| r0.1 | label_boi_a2/Fixed rate | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CL:x36 | boi_CS:x1 | boi_CU:x23 | boi_CU:x5 | boi_MC:x8 | N/A | N/A | boi_SE:x80 | N/A | N/A |
| r0.2 | label_boi_a2/Floating rate | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CL:x36 | boi_CS:x1 | boi_CU:x24 | boi_CU:x5 | boi_MC:x8 | N/A | N/A | boi_SE:x80 | N/A | N/A |
| r0.3 | label_boi_a2/Fixed rate | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CL:x36 | boi_CS:x1 | boi_CU:x23 | boi_CU:x6 | boi_MC:x8 | N/A | N/A | boi_SE:x80 | N/A | N/A |
| r0.4 | label_boi_a2/Floating rate | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CL:x36 | boi_CS:x1 | boi_CU:x24 | boi_CU:x6 | boi_MC:x8 | N/A | N/A | boi_SE:x80 | N/A | N/A |
| r0.5 | label_boi_a2/Fixed rate | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CL:x36 | boi_CS:x1 | boi_CU:x23 | boi_CU:x15 | boi_MC:x8 | N/A | N/A | boi_SE:x80 | N/A | N/A |
| r0.6 | label_boi_a2/Floating rate | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CL:x36 | boi_CS:x1 | boi_CU:x24 | boi_CU:x15 | boi_MC:x8 | N/A | N/A | boi_SE:x80 | N/A | N/A |
| r0.7 | label_boi_a2/Fixed rate | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CL:x36 | boi_CS:x1 | boi_CU:x23 | N/A | boi_MC:x8 | N/A | N/A | boi_SE:x79 | N/A | N/A |
| r0.8 | label_boi_a2/Floating rate | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CL:x36 | boi_CS:x1 | boi_CU:x24 | N/A | boi_MC:x8 | N/A | N/A | boi_SE:x79 | N/A | N/A |
| r0.9 | label_boi_a2/Performance | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CL:x36 | boi_CS:x1 | N/A | N/A | boi_MC:x8 | N/A | N/A | boi_SE:x16 | N/A | N/A |
| r0.10 | label_boi_a2/No. of loans | boi_met:id102 | xbrli:integerItemType | instant | boi_BC:x1 | N/A | boi_CL:x36 | boi_CS:x1 | N/A | N/A | boi_MC:x8 | N/A | N/A | boi_SE:x16 | N/A | N/A |
| r0.11 | label_boi_a2/Performance | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CL:x36 | boi_CS:x1 | N/A | N/A | boi_MC:x8 | N/A | boi_PU:x1 | boi_SE:x16 | N/A | N/A |
| r0.12 | label_boi_a2/No. of loans | boi_met:id102 | xbrli:integerItemType | instant | boi_BC:x1 | N/A | boi_CL:x36 | boi_CS:x1 | N/A | N/A | boi_MC:x8 | N/A | boi_PU:x1 | boi_SE:x16 | N/A | N/A |
| r0.13 | label_boi_a2/Performance | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CL:x36 | boi_CS:x1 | N/A | N/A | boi_MC:x8 | N/A | boi_PU:x31 | boi_SE:x16 | N/A | N/A |
| r0.14 | label_boi_a2/No. of loans | boi_met:id102 | xbrli:integerItemType | instant | boi_BC:x1 | N/A | boi_CL:x36 | boi_CS:x1 | N/A | N/A | boi_MC:x8 | N/A | boi_PU:x31 | boi_SE:x16 | N/A | N/A |
| r0.15 | label_boi_a2/Performance | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CL:x37 | boi_CS:x1 | N/A | N/A | boi_MC:x8 | N/A | N/A | boi_SE:x16 | N/A | N/A |
| r0.16 | label_boi_a2/No. of loans | boi_met:id102 | xbrli:integerItemType | instant | boi_BC:x1 | N/A | boi_CL:x37 | boi_CS:x1 | N/A | N/A | boi_MC:x8 | N/A | N/A | boi_SE:x16 | N/A | N/A |
| r1.1 | LTV/Fixed rate | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x60 | boi_CL:x36 | boi_CS:x1 | boi_CU:x23 | boi_CU:x5 | boi_MC:x8 | N/A | N/A | boi_SE:x80 | N/A | boi_ST:x22 |
| r1.2 | LTV/Floating rate | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x60 | boi_CL:x36 | boi_CS:x1 | boi_CU:x24 | boi_CU:x5 | boi_MC:x8 | N/A | N/A | boi_SE:x80 | N/A | boi_ST:x22 |
| r1.3 | LTV/Fixed rate | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x60 | boi_CL:x36 | boi_CS:x1 | boi_CU:x23 | boi_CU:x6 | boi_MC:x8 | N/A | N/A | boi_SE:x80 | N/A | boi_ST:x22 |
| r1.4 | LTV/Floating rate | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x60 | boi_CL:x36 | boi_CS:x1 | boi_CU:x24 | boi_CU:x6 | boi_MC:x8 | N/A | N/A | boi_SE:x80 | N/A | boi_ST:x22 |
| r1.5 | LTV/Fixed rate | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x60 | boi_CL:x36 | boi_CS:x1 | boi_CU:x23 | boi_CU:x15 | boi_MC:x8 | N/A | N/A | boi_SE:x80 | N/A | boi_ST:x22 |
| r1.6 | LTV/Floating rate | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x60 | boi_CL:x36 | boi_CS:x1 | boi_CU:x24 | boi_CU:x15 | boi_MC:x8 | N/A | N/A | boi_SE:x80 | N/A | boi_ST:x22 |
| r1.7 | LTV/Fixed rate | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x60 | boi_CL:x36 | boi_CS:x1 | boi_CU:x23 | N/A | boi_MC:x8 | N/A | N/A | boi_SE:x79 | N/A | boi_ST:x22 |
| r1.8 | LTV/Floating rate | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x60 | boi_CL:x36 | boi_CS:x1 | boi_CU:x24 | N/A | boi_MC:x8 | N/A | N/A | boi_SE:x79 | N/A | boi_ST:x22 |
| r1.9 | LTV/Performance | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x60 | boi_CL:x36 | boi_CS:x1 | N/A | N/A | boi_MC:x8 | N/A | N/A | boi_SE:x16 | N/A | boi_ST:x22 |
| r1.10 | LTV/No. of loans | boi_met:id102 | xbrli:integerItemType | instant | boi_BC:x1 | boi_CL:x60 | boi_CL:x36 | boi_CS:x1 | N/A | N/A | boi_MC:x8 | N/A | N/A | boi_SE:x16 | N/A | boi_ST:x22 |
| r1.11 | LTV/Performance | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x60 | boi_CL:x36 | boi_CS:x1 | N/A | N/A | boi_MC:x8 | N/A | boi_PU:x1 | boi_SE:x16 | N/A | boi_ST:x22 |
| r1.12 | LTV/No. of loans | boi_met:id102 | xbrli:integerItemType | instant | boi_BC:x1 | boi_CL:x60 | boi_CL:x36 | boi_CS:x1 | N/A | N/A | boi_MC:x8 | N/A | boi_PU:x1 | boi_SE:x16 | N/A | boi_ST:x22 |
| r1.13 | LTV/Performance | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x60 | boi_CL:x36 | boi_CS:x1 | N/A | N/A | boi_MC:x8 | N/A | boi_PU:x31 | boi_SE:x16 | N/A | boi_ST:x22 |
| r1.14 | LTV/No. of loans | boi_met:id102 | xbrli:integerItemType | instant | boi_BC:x1 | boi_CL:x60 | boi_CL:x36 | boi_CS:x1 | N/A | N/A | boi_MC:x8 | N/A | boi_PU:x31 | boi_SE:x16 | N/A | boi_ST:x22 |
| r1.15 | LTV/Performance | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x60 | boi_CL:x37 | boi_CS:x1 | N/A | N/A | boi_MC:x8 | N/A | N/A | boi_SE:x16 | N/A | boi_ST:x22 |
| r1.16 | LTV/No. of loans | boi_met:id102 | xbrli:integerItemType | instant | boi_BC:x1 | boi_CL:x60 | boi_CL:x37 | boi_CS:x1 | N/A | N/A | boi_MC:x8 | N/A | N/A | boi_SE:x16 | N/A | boi_ST:x22 |
| 1.1 | Up to 30%/Fixed rate | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x60 | boi_CL:x36 | boi_CS:x1 | boi_CU:x23 | boi_CU:x5 | boi_MC:x8 | boi_PI:x13 | N/A | boi_SE:x80 | N/A | boi_ST:x22 |
| 1.2 | Up to 30%/Floating rate | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x60 | boi_CL:x36 | boi_CS:x1 | boi_CU:x24 | boi_CU:x5 | boi_MC:x8 | boi_PI:x13 | N/A | boi_SE:x80 | N/A | boi_ST:x22 |
| 1.3 | Up to 30%/Fixed rate | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x60 | boi_CL:x36 | boi_CS:x1 | boi_CU:x23 | boi_CU:x6 | boi_MC:x8 | boi_PI:x13 | N/A | boi_SE:x80 | N/A | boi_ST:x22 |
| 1.4 | Up to 30%/Floating rate | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x60 | boi_CL:x36 | boi_CS:x1 | boi_CU:x24 | boi_CU:x6 | boi_MC:x8 | boi_PI:x13 | N/A | boi_SE:x80 | N/A | boi_ST:x22 |
| 1.5 | Up to 30%/Fixed rate | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x60 | boi_CL:x36 | boi_CS:x1 | boi_CU:x23 | boi_CU:x15 | boi_MC:x8 | boi_PI:x13 | N/A | boi_SE:x80 | N/A | boi_ST:x22 |
| 1.6 | Up to 30%/Floating rate | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x60 | boi_CL:x36 | boi_CS:x1 | boi_CU:x24 | boi_CU:x15 | boi_MC:x8 | boi_PI:x13 | N/A | boi_SE:x80 | N/A | boi_ST:x22 |
| 1.7 | Up to 30%/Fixed rate | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x60 | boi_CL:x36 | boi_CS:x1 | boi_CU:x23 | N/A | boi_MC:x8 | boi_PI:x13 | N/A | boi_SE:x79 | N/A | boi_ST:x22 |
| 1.8 | Up to 30%/Floating rate | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x60 | boi_CL:x36 | boi_CS:x1 | boi_CU:x24 | N/A | boi_MC:x8 | boi_PI:x13 | N/A | boi_SE:x79 | N/A | boi_ST:x22 |
| 1.9 | Up to 30%/Performance | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x60 | boi_CL:x36 | boi_CS:x1 | N/A | N/A | boi_MC:x8 | boi_PI:x13 | N/A | boi_SE:x16 | N/A | boi_ST:x22 |
| 1.10 | Up to 30%/No. of loans | boi_met:id102 | xbrli:integerItemType | instant | boi_BC:x1 | boi_CL:x60 | boi_CL:x36 | boi_CS:x1 | N/A | N/A | boi_MC:x8 | boi_PI:x13 | N/A | boi_SE:x16 | N/A | boi_ST:x22 |
| 1.11 | Up to 30%/Performance | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x60 | boi_CL:x36 | boi_CS:x1 | N/A | N/A | boi_MC:x8 | boi_PI:x13 | boi_PU:x1 | boi_SE:x16 | N/A | boi_ST:x22 |
| 1.12 | Up to 30%/No. of loans | boi_met:id102 | xbrli:integerItemType | instant | boi_BC:x1 | boi_CL:x60 | boi_CL:x36 | boi_CS:x1 | N/A | N/A | boi_MC:x8 | boi_PI:x13 | boi_PU:x1 | boi_SE:x16 | N/A | boi_ST:x22 |
| 1.13 | Up to 30%/Performance | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x60 | boi_CL:x36 | boi_CS:x1 | N/A | N/A | boi_MC:x8 | boi_PI:x13 | boi_PU:x31 | boi_SE:x16 | N/A | boi_ST:x22 |
| 1.14 | Up to 30%/No. of loans | boi_met:id102 | xbrli:integerItemType | instant | boi_BC:x1 | boi_CL:x60 | boi_CL:x36 | boi_CS:x1 | N/A | N/A | boi_MC:x8 | boi_PI:x13 | boi_PU:x31 | boi_SE:x16 | N/A | boi_ST:x22 |
| 1.15 | Up to 30%/Performance | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x60 | boi_CL:x37 | boi_CS:x1 | N/A | N/A | boi_MC:x8 | boi_PI:x13 | N/A | boi_SE:x16 | N/A | boi_ST:x22 |
| 1.16 | Up to 30%/No. of loans | boi_met:id102 | xbrli:integerItemType | instant | boi_BC:x1 | boi_CL:x60 | boi_CL:x37 | boi_CS:x1 | N/A | N/A | boi_MC:x8 | boi_PI:x13 | N/A | boi_SE:x16 | N/A | boi_ST:x22 |
| 2.1 | >30% - 45%/Fixed rate | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x60 | boi_CL:x36 | boi_CS:x1 | boi_CU:x23 | boi_CU:x5 | boi_MC:x8 | boi_PI:x14 | N/A | boi_SE:x80 | N/A | boi_ST:x22 |
| 2.2 | >30% - 45%/Floating rate | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x60 | boi_CL:x36 | boi_CS:x1 | boi_CU:x24 | boi_CU:x5 | boi_MC:x8 | boi_PI:x14 | N/A | boi_SE:x80 | N/A | boi_ST:x22 |
| 2.3 | >30% - 45%/Fixed rate | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x60 | boi_CL:x36 | boi_CS:x1 | boi_CU:x23 | boi_CU:x6 | boi_MC:x8 | boi_PI:x14 | N/A | boi_SE:x80 | N/A | boi_ST:x22 |
| 2.4 | >30% - 45%/Floating rate | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x60 | boi_CL:x36 | boi_CS:x1 | boi_CU:x24 | boi_CU:x6 | boi_MC:x8 | boi_PI:x14 | N/A | boi_SE:x80 | N/A | boi_ST:x22 |
| 2.5 | >30% - 45%/Fixed rate | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x60 | boi_CL:x36 | boi_CS:x1 | boi_CU:x23 | boi_CU:x15 | boi_MC:x8 | boi_PI:x14 | N/A | boi_SE:x80 | N/A | boi_ST:x22 |
| 2.6 | >30% - 45%/Floating rate | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x60 | boi_CL:x36 | boi_CS:x1 | boi_CU:x24 | boi_CU:x15 | boi_MC:x8 | boi_PI:x14 | N/A | boi_SE:x80 | N/A | boi_ST:x22 |
| 2.7 | >30% - 45%/Fixed rate | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x60 | boi_CL:x36 | boi_CS:x1 | boi_CU:x23 | N/A | boi_MC:x8 | boi_PI:x14 | N/A | boi_SE:x79 | N/A | boi_ST:x22 |
| 2.8 | >30% - 45%/Floating rate | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x60 | boi_CL:x36 | boi_CS:x1 | boi_CU:x24 | N/A | boi_MC:x8 | boi_PI:x14 | N/A | boi_SE:x79 | N/A | boi_ST:x22 |
| 2.9 | >30% - 45%/Performance | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x60 | boi_CL:x36 | boi_CS:x1 | N/A | N/A | boi_MC:x8 | boi_PI:x14 | N/A | boi_SE:x16 | N/A | boi_ST:x22 |
| 2.10 | >30% - 45%/No. of loans | boi_met:id102 | xbrli:integerItemType | instant | boi_BC:x1 | boi_CL:x60 | boi_CL:x36 | boi_CS:x1 | N/A | N/A | boi_MC:x8 | boi_PI:x14 | N/A | boi_SE:x16 | N/A | boi_ST:x22 |
| 2.11 | >30% - 45%/Performance | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x60 | boi_CL:x36 | boi_CS:x1 | N/A | N/A | boi_MC:x8 | boi_PI:x14 | boi_PU:x1 | boi_SE:x16 | N/A | boi_ST:x22 |
| 2.12 | >30% - 45%/No. of loans | boi_met:id102 | xbrli:integerItemType | instant | boi_BC:x1 | boi_CL:x60 | boi_CL:x36 | boi_CS:x1 | N/A | N/A | boi_MC:x8 | boi_PI:x14 | boi_PU:x1 | boi_SE:x16 | N/A | boi_ST:x22 |
| 2.13 | >30% - 45%/Performance | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x60 | boi_CL:x36 | boi_CS:x1 | N/A | N/A | boi_MC:x8 | boi_PI:x14 | boi_PU:x31 | boi_SE:x16 | N/A | boi_ST:x22 |
| 2.14 | >30% - 45%/No. of loans | boi_met:id102 | xbrli:integerItemType | instant | boi_BC:x1 | boi_CL:x60 | boi_CL:x36 | boi_CS:x1 | N/A | N/A | boi_MC:x8 | boi_PI:x14 | boi_PU:x31 | boi_SE:x16 | N/A | boi_ST:x22 |
| 2.15 | >30% - 45%/Performance | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x60 | boi_CL:x37 | boi_CS:x1 | N/A | N/A | boi_MC:x8 | boi_PI:x14 | N/A | boi_SE:x16 | N/A | boi_ST:x22 |
| 2.16 | >30% - 45%/No. of loans | boi_met:id102 | xbrli:integerItemType | instant | boi_BC:x1 | boi_CL:x60 | boi_CL:x37 | boi_CS:x1 | N/A | N/A | boi_MC:x8 | boi_PI:x14 | N/A | boi_SE:x16 | N/A | boi_ST:x22 |
| 3.1 | >45% - 60%/Fixed rate | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x60 | boi_CL:x36 | boi_CS:x1 | boi_CU:x23 | boi_CU:x5 | boi_MC:x8 | boi_PI:x15 | N/A | boi_SE:x80 | N/A | boi_ST:x22 |
| 3.2 | >45% - 60%/Floating rate | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x60 | boi_CL:x36 | boi_CS:x1 | boi_CU:x24 | boi_CU:x5 | boi_MC:x8 | boi_PI:x15 | N/A | boi_SE:x80 | N/A | boi_ST:x22 |
| 3.3 | >45% - 60%/Fixed rate | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x60 | boi_CL:x36 | boi_CS:x1 | boi_CU:x23 | boi_CU:x6 | boi_MC:x8 | boi_PI:x15 | N/A | boi_SE:x80 | N/A | boi_ST:x22 |
| 3.4 | >45% - 60%/Floating rate | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x60 | boi_CL:x36 | boi_CS:x1 | boi_CU:x24 | boi_CU:x6 | boi_MC:x8 | boi_PI:x15 | N/A | boi_SE:x80 | N/A | boi_ST:x22 |
| 3.5 | >45% - 60%/Fixed rate | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x60 | boi_CL:x36 | boi_CS:x1 | boi_CU:x23 | boi_CU:x15 | boi_MC:x8 | boi_PI:x15 | N/A | boi_SE:x80 | N/A | boi_ST:x22 |
| 3.6 | >45% - 60%/Floating rate | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x60 | boi_CL:x36 | boi_CS:x1 | boi_CU:x24 | boi_CU:x15 | boi_MC:x8 | boi_PI:x15 | N/A | boi_SE:x80 | N/A | boi_ST:x22 |
| 3.7 | >45% - 60%/Fixed rate | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x60 | boi_CL:x36 | boi_CS:x1 | boi_CU:x23 | N/A | boi_MC:x8 | boi_PI:x15 | N/A | boi_SE:x79 | N/A | boi_ST:x22 |
| 3.8 | >45% - 60%/Floating rate | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x60 | boi_CL:x36 | boi_CS:x1 | boi_CU:x24 | N/A | boi_MC:x8 | boi_PI:x15 | N/A | boi_SE:x79 | N/A | boi_ST:x22 |
| 3.9 | >45% - 60%/Performance | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x60 | boi_CL:x36 | boi_CS:x1 | N/A | N/A | boi_MC:x8 | boi_PI:x15 | N/A | boi_SE:x16 | N/A | boi_ST:x22 |
| 3.10 | >45% - 60%/No. of loans | boi_met:id102 | xbrli:integerItemType | instant | boi_BC:x1 | boi_CL:x60 | boi_CL:x36 | boi_CS:x1 | N/A | N/A | boi_MC:x8 | boi_PI:x15 | N/A | boi_SE:x16 | N/A | boi_ST:x22 |
| 3.11 | >45% - 60%/Performance | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x60 | boi_CL:x36 | boi_CS:x1 | N/A | N/A | boi_MC:x8 | boi_PI:x15 | boi_PU:x1 | boi_SE:x16 | N/A | boi_ST:x22 |
| 3.12 | >45% - 60%/No. of loans | boi_met:id102 | xbrli:integerItemType | instant | boi_BC:x1 | boi_CL:x60 | boi_CL:x36 | boi_CS:x1 | N/A | N/A | boi_MC:x8 | boi_PI:x15 | boi_PU:x1 | boi_SE:x16 | N/A | boi_ST:x22 |
| 3.13 | >45% - 60%/Performance | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x60 | boi_CL:x36 | boi_CS:x1 | N/A | N/A | boi_MC:x8 | boi_PI:x15 | boi_PU:x31 | boi_SE:x16 | N/A | boi_ST:x22 |
| 3.14 | >45% - 60%/No. of loans | boi_met:id102 | xbrli:integerItemType | instant | boi_BC:x1 | boi_CL:x60 | boi_CL:x36 | boi_CS:x1 | N/A | N/A | boi_MC:x8 | boi_PI:x15 | boi_PU:x31 | boi_SE:x16 | N/A | boi_ST:x22 |
| 3.15 | >45% - 60%/Performance | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x60 | boi_CL:x37 | boi_CS:x1 | N/A | N/A | boi_MC:x8 | boi_PI:x15 | N/A | boi_SE:x16 | N/A | boi_ST:x22 |
| 3.16 | >45% - 60%/No. of loans | boi_met:id102 | xbrli:integerItemType | instant | boi_BC:x1 | boi_CL:x60 | boi_CL:x37 | boi_CS:x1 | N/A | N/A | boi_MC:x8 | boi_PI:x15 | N/A | boi_SE:x16 | N/A | boi_ST:x22 |
| 4.1 | >60% - 75%/Fixed rate | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x60 | boi_CL:x36 | boi_CS:x1 | boi_CU:x23 | boi_CU:x5 | boi_MC:x8 | boi_PI:x16 | N/A | boi_SE:x80 | N/A | boi_ST:x22 |
| 4.2 | >60% - 75%/Floating rate | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x60 | boi_CL:x36 | boi_CS:x1 | boi_CU:x24 | boi_CU:x5 | boi_MC:x8 | boi_PI:x16 | N/A | boi_SE:x80 | N/A | boi_ST:x22 |
| 4.3 | >60% - 75%/Fixed rate | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x60 | boi_CL:x36 | boi_CS:x1 | boi_CU:x23 | boi_CU:x6 | boi_MC:x8 | boi_PI:x16 | N/A | boi_SE:x80 | N/A | boi_ST:x22 |
| 4.4 | >60% - 75%/Floating rate | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x60 | boi_CL:x36 | boi_CS:x1 | boi_CU:x24 | boi_CU:x6 | boi_MC:x8 | boi_PI:x16 | N/A | boi_SE:x80 | N/A | boi_ST:x22 |
| 4.5 | >60% - 75%/Fixed rate | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x60 | boi_CL:x36 | boi_CS:x1 | boi_CU:x23 | boi_CU:x15 | boi_MC:x8 | boi_PI:x16 | N/A | boi_SE:x80 | N/A | boi_ST:x22 |
| 4.6 | >60% - 75%/Floating rate | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x60 | boi_CL:x36 | boi_CS:x1 | boi_CU:x24 | boi_CU:x15 | boi_MC:x8 | boi_PI:x16 | N/A | boi_SE:x80 | N/A | boi_ST:x22 |
| 4.7 | >60% - 75%/Fixed rate | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x60 | boi_CL:x36 | boi_CS:x1 | boi_CU:x23 | N/A | boi_MC:x8 | boi_PI:x16 | N/A | boi_SE:x79 | N/A | boi_ST:x22 |
| 4.8 | >60% - 75%/Floating rate | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x60 | boi_CL:x36 | boi_CS:x1 | boi_CU:x24 | N/A | boi_MC:x8 | boi_PI:x16 | N/A | boi_SE:x79 | N/A | boi_ST:x22 |
| 4.9 | >60% - 75%/Performance | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x60 | boi_CL:x36 | boi_CS:x1 | N/A | N/A | boi_MC:x8 | boi_PI:x16 | N/A | boi_SE:x16 | N/A | boi_ST:x22 |
| 4.10 | >60% - 75%/No. of loans | boi_met:id102 | xbrli:integerItemType | instant | boi_BC:x1 | boi_CL:x60 | boi_CL:x36 | boi_CS:x1 | N/A | N/A | boi_MC:x8 | boi_PI:x16 | N/A | boi_SE:x16 | N/A | boi_ST:x22 |
| 4.11 | >60% - 75%/Performance | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x60 | boi_CL:x36 | boi_CS:x1 | N/A | N/A | boi_MC:x8 | boi_PI:x16 | boi_PU:x1 | boi_SE:x16 | N/A | boi_ST:x22 |
| 4.12 | >60% - 75%/No. of loans | boi_met:id102 | xbrli:integerItemType | instant | boi_BC:x1 | boi_CL:x60 | boi_CL:x36 | boi_CS:x1 | N/A | N/A | boi_MC:x8 | boi_PI:x16 | boi_PU:x1 | boi_SE:x16 | N/A | boi_ST:x22 |
| 4.13 | >60% - 75%/Performance | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x60 | boi_CL:x36 | boi_CS:x1 | N/A | N/A | boi_MC:x8 | boi_PI:x16 | boi_PU:x31 | boi_SE:x16 | N/A | boi_ST:x22 |
| 4.14 | >60% - 75%/No. of loans | boi_met:id102 | xbrli:integerItemType | instant | boi_BC:x1 | boi_CL:x60 | boi_CL:x36 | boi_CS:x1 | N/A | N/A | boi_MC:x8 | boi_PI:x16 | boi_PU:x31 | boi_SE:x16 | N/A | boi_ST:x22 |
| 4.15 | >60% - 75%/Performance | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x60 | boi_CL:x37 | boi_CS:x1 | N/A | N/A | boi_MC:x8 | boi_PI:x16 | N/A | boi_SE:x16 | N/A | boi_ST:x22 |
| 4.16 | >60% - 75%/No. of loans | boi_met:id102 | xbrli:integerItemType | instant | boi_BC:x1 | boi_CL:x60 | boi_CL:x37 | boi_CS:x1 | N/A | N/A | boi_MC:x8 | boi_PI:x16 | N/A | boi_SE:x16 | N/A | boi_ST:x22 |
| 5.1 | >75% - 90%/Fixed rate | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x60 | boi_CL:x36 | boi_CS:x1 | boi_CU:x23 | boi_CU:x5 | boi_MC:x8 | boi_PI:x17 | N/A | boi_SE:x80 | N/A | boi_ST:x22 |
| 5.2 | >75% - 90%/Floating rate | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x60 | boi_CL:x36 | boi_CS:x1 | boi_CU:x24 | boi_CU:x5 | boi_MC:x8 | boi_PI:x17 | N/A | boi_SE:x80 | N/A | boi_ST:x22 |
| 5.3 | >75% - 90%/Fixed rate | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x60 | boi_CL:x36 | boi_CS:x1 | boi_CU:x23 | boi_CU:x6 | boi_MC:x8 | boi_PI:x17 | N/A | boi_SE:x80 | N/A | boi_ST:x22 |
| 5.4 | >75% - 90%/Floating rate | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x60 | boi_CL:x36 | boi_CS:x1 | boi_CU:x24 | boi_CU:x6 | boi_MC:x8 | boi_PI:x17 | N/A | boi_SE:x80 | N/A | boi_ST:x22 |
| 5.5 | >75% - 90%/Fixed rate | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x60 | boi_CL:x36 | boi_CS:x1 | boi_CU:x23 | boi_CU:x15 | boi_MC:x8 | boi_PI:x17 | N/A | boi_SE:x80 | N/A | boi_ST:x22 |
| 5.6 | >75% - 90%/Floating rate | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x60 | boi_CL:x36 | boi_CS:x1 | boi_CU:x24 | boi_CU:x15 | boi_MC:x8 | boi_PI:x17 | N/A | boi_SE:x80 | N/A | boi_ST:x22 |
| 5.7 | >75% - 90%/Fixed rate | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x60 | boi_CL:x36 | boi_CS:x1 | boi_CU:x23 | N/A | boi_MC:x8 | boi_PI:x17 | N/A | boi_SE:x79 | N/A | boi_ST:x22 |
| 5.8 | >75% - 90%/Floating rate | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x60 | boi_CL:x36 | boi_CS:x1 | boi_CU:x24 | N/A | boi_MC:x8 | boi_PI:x17 | N/A | boi_SE:x79 | N/A | boi_ST:x22 |
| 5.9 | >75% - 90%/Performance | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x60 | boi_CL:x36 | boi_CS:x1 | N/A | N/A | boi_MC:x8 | boi_PI:x17 | N/A | boi_SE:x16 | N/A | boi_ST:x22 |
| 5.10 | >75% - 90%/No. of loans | boi_met:id102 | xbrli:integerItemType | instant | boi_BC:x1 | boi_CL:x60 | boi_CL:x36 | boi_CS:x1 | N/A | N/A | boi_MC:x8 | boi_PI:x17 | N/A | boi_SE:x16 | N/A | boi_ST:x22 |
| 5.11 | >75% - 90%/Performance | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x60 | boi_CL:x36 | boi_CS:x1 | N/A | N/A | boi_MC:x8 | boi_PI:x17 | boi_PU:x1 | boi_SE:x16 | N/A | boi_ST:x22 |
| 5.12 | >75% - 90%/No. of loans | boi_met:id102 | xbrli:integerItemType | instant | boi_BC:x1 | boi_CL:x60 | boi_CL:x36 | boi_CS:x1 | N/A | N/A | boi_MC:x8 | boi_PI:x17 | boi_PU:x1 | boi_SE:x16 | N/A | boi_ST:x22 |
| 5.13 | >75% - 90%/Performance | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x60 | boi_CL:x36 | boi_CS:x1 | N/A | N/A | boi_MC:x8 | boi_PI:x17 | boi_PU:x31 | boi_SE:x16 | N/A | boi_ST:x22 |
| 5.14 | >75% - 90%/No. of loans | boi_met:id102 | xbrli:integerItemType | instant | boi_BC:x1 | boi_CL:x60 | boi_CL:x36 | boi_CS:x1 | N/A | N/A | boi_MC:x8 | boi_PI:x17 | boi_PU:x31 | boi_SE:x16 | N/A | boi_ST:x22 |
| 5.15 | >75% - 90%/Performance | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x60 | boi_CL:x37 | boi_CS:x1 | N/A | N/A | boi_MC:x8 | boi_PI:x17 | N/A | boi_SE:x16 | N/A | boi_ST:x22 |
| 5.16 | >75% - 90%/No. of loans | boi_met:id102 | xbrli:integerItemType | instant | boi_BC:x1 | boi_CL:x60 | boi_CL:x37 | boi_CS:x1 | N/A | N/A | boi_MC:x8 | boi_PI:x17 | N/A | boi_SE:x16 | N/A | boi_ST:x22 |
| 6.1 | >90%/Fixed rate | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x60 | boi_CL:x36 | boi_CS:x1 | boi_CU:x23 | boi_CU:x5 | boi_MC:x8 | boi_PI:x18 | N/A | boi_SE:x80 | N/A | boi_ST:x22 |
| 6.2 | >90%/Floating rate | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x60 | boi_CL:x36 | boi_CS:x1 | boi_CU:x24 | boi_CU:x5 | boi_MC:x8 | boi_PI:x18 | N/A | boi_SE:x80 | N/A | boi_ST:x22 |
| 6.3 | >90%/Fixed rate | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x60 | boi_CL:x36 | boi_CS:x1 | boi_CU:x23 | boi_CU:x6 | boi_MC:x8 | boi_PI:x18 | N/A | boi_SE:x80 | N/A | boi_ST:x22 |
| 6.4 | >90%/Floating rate | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x60 | boi_CL:x36 | boi_CS:x1 | boi_CU:x24 | boi_CU:x6 | boi_MC:x8 | boi_PI:x18 | N/A | boi_SE:x80 | N/A | boi_ST:x22 |
| 6.5 | >90%/Fixed rate | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x60 | boi_CL:x36 | boi_CS:x1 | boi_CU:x23 | boi_CU:x15 | boi_MC:x8 | boi_PI:x18 | N/A | boi_SE:x80 | N/A | boi_ST:x22 |
| 6.6 | >90%/Floating rate | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x60 | boi_CL:x36 | boi_CS:x1 | boi_CU:x24 | boi_CU:x15 | boi_MC:x8 | boi_PI:x18 | N/A | boi_SE:x80 | N/A | boi_ST:x22 |
| 6.7 | >90%/Fixed rate | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x60 | boi_CL:x36 | boi_CS:x1 | boi_CU:x23 | N/A | boi_MC:x8 | boi_PI:x18 | N/A | boi_SE:x79 | N/A | boi_ST:x22 |
| 6.8 | >90%/Floating rate | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x60 | boi_CL:x36 | boi_CS:x1 | boi_CU:x24 | N/A | boi_MC:x8 | boi_PI:x18 | N/A | boi_SE:x79 | N/A | boi_ST:x22 |
| 6.9 | >90%/Performance | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x60 | boi_CL:x36 | boi_CS:x1 | N/A | N/A | boi_MC:x8 | boi_PI:x18 | N/A | boi_SE:x16 | N/A | boi_ST:x22 |
| 6.10 | >90%/No. of loans | boi_met:id102 | xbrli:integerItemType | instant | boi_BC:x1 | boi_CL:x60 | boi_CL:x36 | boi_CS:x1 | N/A | N/A | boi_MC:x8 | boi_PI:x18 | N/A | boi_SE:x16 | N/A | boi_ST:x22 |
| 6.11 | >90%/Performance | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x60 | boi_CL:x36 | boi_CS:x1 | N/A | N/A | boi_MC:x8 | boi_PI:x18 | boi_PU:x1 | boi_SE:x16 | N/A | boi_ST:x22 |
| 6.12 | >90%/No. of loans | boi_met:id102 | xbrli:integerItemType | instant | boi_BC:x1 | boi_CL:x60 | boi_CL:x36 | boi_CS:x1 | N/A | N/A | boi_MC:x8 | boi_PI:x18 | boi_PU:x1 | boi_SE:x16 | N/A | boi_ST:x22 |
| 6.13 | >90%/Performance | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x60 | boi_CL:x36 | boi_CS:x1 | N/A | N/A | boi_MC:x8 | boi_PI:x18 | boi_PU:x31 | boi_SE:x16 | N/A | boi_ST:x22 |
| 6.14 | >90%/No. of loans | boi_met:id102 | xbrli:integerItemType | instant | boi_BC:x1 | boi_CL:x60 | boi_CL:x36 | boi_CS:x1 | N/A | N/A | boi_MC:x8 | boi_PI:x18 | boi_PU:x31 | boi_SE:x16 | N/A | boi_ST:x22 |
| 6.15 | >90%/Performance | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x60 | boi_CL:x37 | boi_CS:x1 | N/A | N/A | boi_MC:x8 | boi_PI:x18 | N/A | boi_SE:x16 | N/A | boi_ST:x22 |
| 6.16 | >90%/No. of loans | boi_met:id102 | xbrli:integerItemType | instant | boi_BC:x1 | boi_CL:x60 | boi_CL:x37 | boi_CS:x1 | N/A | N/A | boi_MC:x8 | boi_PI:x18 | N/A | boi_SE:x16 | N/A | boi_ST:x22 |
| 7.1 | Calculated without security/Fixed rate | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x61 | boi_CL:x36 | boi_CS:x1 | boi_CU:x23 | boi_CU:x5 | boi_MC:x8 | N/A | N/A | boi_SE:x80 | N/A | boi_ST:x22 |
| 7.2 | Calculated without security/Floating rate | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x61 | boi_CL:x36 | boi_CS:x1 | boi_CU:x24 | boi_CU:x5 | boi_MC:x8 | N/A | N/A | boi_SE:x80 | N/A | boi_ST:x22 |
| 7.3 | Calculated without security/Fixed rate | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x61 | boi_CL:x36 | boi_CS:x1 | boi_CU:x23 | boi_CU:x6 | boi_MC:x8 | N/A | N/A | boi_SE:x80 | N/A | boi_ST:x22 |
| 7.4 | Calculated without security/Floating rate | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x61 | boi_CL:x36 | boi_CS:x1 | boi_CU:x24 | boi_CU:x6 | boi_MC:x8 | N/A | N/A | boi_SE:x80 | N/A | boi_ST:x22 |
| 7.5 | Calculated without security/Fixed rate | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x61 | boi_CL:x36 | boi_CS:x1 | boi_CU:x23 | boi_CU:x15 | boi_MC:x8 | N/A | N/A | boi_SE:x80 | N/A | boi_ST:x22 |
| 7.6 | Calculated without security/Floating rate | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x61 | boi_CL:x36 | boi_CS:x1 | boi_CU:x24 | boi_CU:x15 | boi_MC:x8 | N/A | N/A | boi_SE:x80 | N/A | boi_ST:x22 |
| 7.7 | Calculated without security/Fixed rate | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x61 | boi_CL:x36 | boi_CS:x1 | boi_CU:x23 | N/A | boi_MC:x8 | N/A | N/A | boi_SE:x79 | N/A | boi_ST:x22 |
| 7.8 | Calculated without security/Floating rate | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x61 | boi_CL:x36 | boi_CS:x1 | boi_CU:x24 | N/A | boi_MC:x8 | N/A | N/A | boi_SE:x79 | N/A | boi_ST:x22 |
| 7.9 | Calculated without security/Performance | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x61 | boi_CL:x36 | boi_CS:x1 | N/A | N/A | boi_MC:x8 | N/A | N/A | boi_SE:x16 | N/A | boi_ST:x22 |
| 7.10 | Calculated without security/No. of loans | boi_met:id102 | xbrli:integerItemType | instant | boi_BC:x1 | boi_CL:x61 | boi_CL:x36 | boi_CS:x1 | N/A | N/A | boi_MC:x8 | N/A | N/A | boi_SE:x16 | N/A | boi_ST:x22 |
| 7.11 | Calculated without security/Performance | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x61 | boi_CL:x36 | boi_CS:x1 | N/A | N/A | boi_MC:x8 | N/A | boi_PU:x1 | boi_SE:x16 | N/A | boi_ST:x22 |
| 7.12 | Calculated without security/No. of loans | boi_met:id102 | xbrli:integerItemType | instant | boi_BC:x1 | boi_CL:x61 | boi_CL:x36 | boi_CS:x1 | N/A | N/A | boi_MC:x8 | N/A | boi_PU:x1 | boi_SE:x16 | N/A | boi_ST:x22 |
| 7.13 | Calculated without security/Performance | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x61 | boi_CL:x36 | boi_CS:x1 | N/A | N/A | boi_MC:x8 | N/A | boi_PU:x31 | boi_SE:x16 | N/A | boi_ST:x22 |
| 7.14 | Calculated without security/No. of loans | boi_met:id102 | xbrli:integerItemType | instant | boi_BC:x1 | boi_CL:x61 | boi_CL:x36 | boi_CS:x1 | N/A | N/A | boi_MC:x8 | N/A | boi_PU:x31 | boi_SE:x16 | N/A | boi_ST:x22 |
| 7.15 | Calculated without security/Performance | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x61 | boi_CL:x37 | boi_CS:x1 | N/A | N/A | boi_MC:x8 | N/A | N/A | boi_SE:x16 | N/A | boi_ST:x22 |
| 7.16 | Calculated without security/No. of loans | boi_met:id102 | xbrli:integerItemType | instant | boi_BC:x1 | boi_CL:x61 | boi_CL:x37 | boi_CS:x1 | N/A | N/A | boi_MC:x8 | N/A | N/A | boi_SE:x16 | N/A | boi_ST:x22 |
| 8.1 | Total/Fixed rate | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CL:x36 | boi_CS:x1 | boi_CU:x23 | boi_CU:x5 | boi_MC:x8 | N/A | N/A | boi_SE:x80 | N/A | boi_ST:x22 |
| 8.2 | Total/Floating rate | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CL:x36 | boi_CS:x1 | boi_CU:x24 | boi_CU:x5 | boi_MC:x8 | N/A | N/A | boi_SE:x80 | N/A | boi_ST:x22 |
| 8.3 | Total/Fixed rate | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CL:x36 | boi_CS:x1 | boi_CU:x23 | boi_CU:x6 | boi_MC:x8 | N/A | N/A | boi_SE:x80 | N/A | boi_ST:x22 |
| 8.4 | Total/Floating rate | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CL:x36 | boi_CS:x1 | boi_CU:x24 | boi_CU:x6 | boi_MC:x8 | N/A | N/A | boi_SE:x80 | N/A | boi_ST:x22 |
| 8.5 | Total/Fixed rate | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CL:x36 | boi_CS:x1 | boi_CU:x23 | boi_CU:x15 | boi_MC:x8 | N/A | N/A | boi_SE:x80 | N/A | boi_ST:x22 |
| 8.6 | Total/Floating rate | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CL:x36 | boi_CS:x1 | boi_CU:x24 | boi_CU:x15 | boi_MC:x8 | N/A | N/A | boi_SE:x80 | N/A | boi_ST:x22 |
| 8.7 | Total/Fixed rate | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CL:x36 | boi_CS:x1 | boi_CU:x23 | N/A | boi_MC:x8 | N/A | N/A | boi_SE:x79 | N/A | boi_ST:x22 |
| 8.8 | Total/Floating rate | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CL:x36 | boi_CS:x1 | boi_CU:x24 | N/A | boi_MC:x8 | N/A | N/A | boi_SE:x79 | N/A | boi_ST:x22 |
| 8.9 | Total/Performance | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CL:x36 | boi_CS:x1 | N/A | N/A | boi_MC:x8 | N/A | N/A | boi_SE:x16 | N/A | boi_ST:x22 |
| 8.10 | Total/No. of loans | boi_met:id102 | xbrli:integerItemType | instant | boi_BC:x1 | N/A | boi_CL:x36 | boi_CS:x1 | N/A | N/A | boi_MC:x8 | N/A | N/A | boi_SE:x16 | N/A | boi_ST:x22 |
| 8.11 | Total/Performance | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CL:x36 | boi_CS:x1 | N/A | N/A | boi_MC:x8 | N/A | boi_PU:x1 | boi_SE:x16 | N/A | boi_ST:x22 |
| 8.12 | Total/No. of loans | boi_met:id102 | xbrli:integerItemType | instant | boi_BC:x1 | N/A | boi_CL:x36 | boi_CS:x1 | N/A | N/A | boi_MC:x8 | N/A | boi_PU:x1 | boi_SE:x16 | N/A | boi_ST:x22 |
| 8.13 | Total/Performance | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CL:x36 | boi_CS:x1 | N/A | N/A | boi_MC:x8 | N/A | boi_PU:x31 | boi_SE:x16 | N/A | boi_ST:x22 |
| 8.14 | Total/No. of loans | boi_met:id102 | xbrli:integerItemType | instant | boi_BC:x1 | N/A | boi_CL:x36 | boi_CS:x1 | N/A | N/A | boi_MC:x8 | N/A | boi_PU:x31 | boi_SE:x16 | N/A | boi_ST:x22 |
| 8.15 | Total/Performance | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CL:x37 | boi_CS:x1 | N/A | N/A | boi_MC:x8 | N/A | N/A | boi_SE:x16 | N/A | boi_ST:x22 |
| 8.16 | Total/No. of loans | boi_met:id102 | xbrli:integerItemType | instant | boi_BC:x1 | N/A | boi_CL:x37 | boi_CS:x1 | N/A | N/A | boi_MC:x8 | N/A | N/A | boi_SE:x16 | N/A | boi_ST:x22 |
| 9.1 | Thereof: credit issued for payback of other bank's housing credit/Fixed rate | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CL:x36 | boi_CS:x1 | boi_CU:x23 | boi_CU:x5 | boi_MC:x8 | N/A | N/A | boi_SE:x80 | N/A | boi_ST:x23 |
| 9.2 | Thereof: credit issued for payback of other bank's housing credit/Floating rate | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CL:x36 | boi_CS:x1 | boi_CU:x24 | boi_CU:x5 | boi_MC:x8 | N/A | N/A | boi_SE:x80 | N/A | boi_ST:x23 |
| 9.3 | Thereof: credit issued for payback of other bank's housing credit/Fixed rate | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CL:x36 | boi_CS:x1 | boi_CU:x23 | boi_CU:x6 | boi_MC:x8 | N/A | N/A | boi_SE:x80 | N/A | boi_ST:x23 |
| 9.4 | Thereof: credit issued for payback of other bank's housing credit/Floating rate | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CL:x36 | boi_CS:x1 | boi_CU:x24 | boi_CU:x6 | boi_MC:x8 | N/A | N/A | boi_SE:x80 | N/A | boi_ST:x23 |
| 9.5 | Thereof: credit issued for payback of other bank's housing credit/Fixed rate | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CL:x36 | boi_CS:x1 | boi_CU:x23 | boi_CU:x15 | boi_MC:x8 | N/A | N/A | boi_SE:x80 | N/A | boi_ST:x23 |
| 9.6 | Thereof: credit issued for payback of other bank's housing credit/Floating rate | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CL:x36 | boi_CS:x1 | boi_CU:x24 | boi_CU:x15 | boi_MC:x8 | N/A | N/A | boi_SE:x80 | N/A | boi_ST:x23 |
| 9.7 | Thereof: credit issued for payback of other bank's housing credit/Fixed rate | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CL:x36 | boi_CS:x1 | boi_CU:x23 | N/A | boi_MC:x8 | N/A | N/A | boi_SE:x79 | N/A | boi_ST:x23 |
| 9.8 | Thereof: credit issued for payback of other bank's housing credit/Floating rate | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CL:x36 | boi_CS:x1 | boi_CU:x24 | N/A | boi_MC:x8 | N/A | N/A | boi_SE:x79 | N/A | boi_ST:x23 |
| 9.9 | Thereof: credit issued for payback of other bank's housing credit/Performance | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CL:x36 | boi_CS:x1 | N/A | N/A | boi_MC:x8 | N/A | N/A | boi_SE:x16 | N/A | boi_ST:x23 |
| 9.10 | Thereof: credit issued for payback of other bank's housing credit/No. of loans | boi_met:id102 | xbrli:integerItemType | instant | boi_BC:x1 | N/A | boi_CL:x36 | boi_CS:x1 | N/A | N/A | boi_MC:x8 | N/A | N/A | boi_SE:x16 | N/A | boi_ST:x23 |
| 9.11 | Thereof: credit issued for payback of other bank's housing credit/Performance | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CL:x36 | boi_CS:x1 | N/A | N/A | boi_MC:x8 | N/A | boi_PU:x1 | boi_SE:x16 | N/A | boi_ST:x23 |
| 9.12 | Thereof: credit issued for payback of other bank's housing credit/No. of loans | boi_met:id102 | xbrli:integerItemType | instant | boi_BC:x1 | N/A | boi_CL:x36 | boi_CS:x1 | N/A | N/A | boi_MC:x8 | N/A | boi_PU:x1 | boi_SE:x16 | N/A | boi_ST:x23 |
| 9.13 | Thereof: credit issued for payback of other bank's housing credit/Performance | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CL:x36 | boi_CS:x1 | N/A | N/A | boi_MC:x8 | N/A | boi_PU:x31 | boi_SE:x16 | N/A | boi_ST:x23 |
| 9.14 | Thereof: credit issued for payback of other bank's housing credit/No. of loans | boi_met:id102 | xbrli:integerItemType | instant | boi_BC:x1 | N/A | boi_CL:x36 | boi_CS:x1 | N/A | N/A | boi_MC:x8 | N/A | boi_PU:x31 | boi_SE:x16 | N/A | boi_ST:x23 |
| 9.15 | Thereof: credit issued for payback of other bank's housing credit/Performance | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CL:x37 | boi_CS:x1 | N/A | N/A | boi_MC:x8 | N/A | N/A | boi_SE:x16 | N/A | boi_ST:x23 |
| 9.16 | Thereof: credit issued for payback of other bank's housing credit/No. of loans | boi_met:id102 | xbrli:integerItemType | instant | boi_BC:x1 | N/A | boi_CL:x37 | boi_CS:x1 | N/A | N/A | boi_MC:x8 | N/A | N/A | boi_SE:x16 | N/A | boi_ST:x23 |
| 10.1 | Thereof: credit issued for payback of housing credit by Midat Gvia Plan/Fixed rate | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CL:x36 | boi_CS:x1 | boi_CU:x23 | boi_CU:x5 | boi_MC:x8 | N/A | N/A | boi_SE:x80 | N/A | boi_ST:x154 |
| 10.2 | Thereof: credit issued for payback of housing credit by Midat Gvia Plan/Floating rate | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CL:x36 | boi_CS:x1 | boi_CU:x24 | boi_CU:x5 | boi_MC:x8 | N/A | N/A | boi_SE:x80 | N/A | boi_ST:x154 |
| 10.3 | Thereof: credit issued for payback of housing credit by Midat Gvia Plan/Fixed rate | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CL:x36 | boi_CS:x1 | boi_CU:x23 | boi_CU:x6 | boi_MC:x8 | N/A | N/A | boi_SE:x80 | N/A | boi_ST:x154 |
| 10.4 | Thereof: credit issued for payback of housing credit by Midat Gvia Plan/Floating rate | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CL:x36 | boi_CS:x1 | boi_CU:x24 | boi_CU:x6 | boi_MC:x8 | N/A | N/A | boi_SE:x80 | N/A | boi_ST:x154 |
| 10.5 | Thereof: credit issued for payback of housing credit by Midat Gvia Plan/Fixed rate | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CL:x36 | boi_CS:x1 | boi_CU:x23 | boi_CU:x15 | boi_MC:x8 | N/A | N/A | boi_SE:x80 | N/A | boi_ST:x154 |
| 10.6 | Thereof: credit issued for payback of housing credit by Midat Gvia Plan/Floating rate | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CL:x36 | boi_CS:x1 | boi_CU:x24 | boi_CU:x15 | boi_MC:x8 | N/A | N/A | boi_SE:x80 | N/A | boi_ST:x154 |
| 10.7 | Thereof: credit issued for payback of housing credit by Midat Gvia Plan/Fixed rate | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CL:x36 | boi_CS:x1 | boi_CU:x23 | N/A | boi_MC:x8 | N/A | N/A | boi_SE:x79 | N/A | boi_ST:x154 |
| 10.8 | Thereof: credit issued for payback of housing credit by Midat Gvia Plan/Floating rate | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CL:x36 | boi_CS:x1 | boi_CU:x24 | N/A | boi_MC:x8 | N/A | N/A | boi_SE:x79 | N/A | boi_ST:x154 |
| 10.9 | Thereof: credit issued for payback of housing credit by Midat Gvia Plan/Performance | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CL:x36 | boi_CS:x1 | N/A | N/A | boi_MC:x8 | N/A | N/A | boi_SE:x16 | N/A | boi_ST:x154 |
| 10.10 | Thereof: credit issued for payback of housing credit by Midat Gvia Plan/No. of loans | boi_met:id102 | xbrli:integerItemType | instant | boi_BC:x1 | N/A | boi_CL:x36 | boi_CS:x1 | N/A | N/A | boi_MC:x8 | N/A | N/A | boi_SE:x16 | N/A | boi_ST:x154 |
| 10.11 | Thereof: credit issued for payback of housing credit by Midat Gvia Plan/Performance | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CL:x36 | boi_CS:x1 | N/A | N/A | boi_MC:x8 | N/A | boi_PU:x1 | boi_SE:x16 | N/A | boi_ST:x154 |
| 10.12 | Thereof: credit issued for payback of housing credit by Midat Gvia Plan/No. of loans | boi_met:id102 | xbrli:integerItemType | instant | boi_BC:x1 | N/A | boi_CL:x36 | boi_CS:x1 | N/A | N/A | boi_MC:x8 | N/A | boi_PU:x1 | boi_SE:x16 | N/A | boi_ST:x154 |
| 10.13 | Thereof: credit issued for payback of housing credit by Midat Gvia Plan/Performance | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CL:x36 | boi_CS:x1 | N/A | N/A | boi_MC:x8 | N/A | boi_PU:x31 | boi_SE:x16 | N/A | boi_ST:x154 |
| 10.14 | Thereof: credit issued for payback of housing credit by Midat Gvia Plan/No. of loans | boi_met:id102 | xbrli:integerItemType | instant | boi_BC:x1 | N/A | boi_CL:x36 | boi_CS:x1 | N/A | N/A | boi_MC:x8 | N/A | boi_PU:x31 | boi_SE:x16 | N/A | boi_ST:x154 |
| 10.15 | Thereof: credit issued for payback of housing credit by Midat Gvia Plan/Performance | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CL:x37 | boi_CS:x1 | N/A | N/A | boi_MC:x8 | N/A | N/A | boi_SE:x16 | N/A | boi_ST:x154 |
| 10.16 | Thereof: credit issued for payback of housing credit by Midat Gvia Plan/No. of loans | boi_met:id102 | xbrli:integerItemType | instant | boi_BC:x1 | N/A | boi_CL:x37 | boi_CS:x1 | N/A | N/A | boi_MC:x8 | N/A | N/A | boi_SE:x16 | N/A | boi_ST:x154 |
| 11.1 | Thereof: credit issued for a person with a disabilities shortnes life/Fixed rate | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CL:x36 | boi_CS:x1 | boi_CU:x23 | boi_CU:x5 | boi_MC:x8 | N/A | N/A | boi_SE:x80 | N/A | boi_ST:x206 |
| 11.2 | Thereof: credit issued for a person with a disabilities shortnes life/Floating rate | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CL:x36 | boi_CS:x1 | boi_CU:x24 | boi_CU:x5 | boi_MC:x8 | N/A | N/A | boi_SE:x80 | N/A | boi_ST:x206 |
| 11.3 | Thereof: credit issued for a person with a disabilities shortnes life/Fixed rate | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CL:x36 | boi_CS:x1 | boi_CU:x23 | boi_CU:x6 | boi_MC:x8 | N/A | N/A | boi_SE:x80 | N/A | boi_ST:x206 |
| 11.4 | Thereof: credit issued for a person with a disabilities shortnes life/Floating rate | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CL:x36 | boi_CS:x1 | boi_CU:x24 | boi_CU:x6 | boi_MC:x8 | N/A | N/A | boi_SE:x80 | N/A | boi_ST:x206 |
| 11.5 | Thereof: credit issued for a person with a disabilities shortnes life/Fixed rate | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CL:x36 | boi_CS:x1 | boi_CU:x23 | boi_CU:x15 | boi_MC:x8 | N/A | N/A | boi_SE:x80 | N/A | boi_ST:x206 |
| 11.6 | Thereof: credit issued for a person with a disabilities shortnes life/Floating rate | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CL:x36 | boi_CS:x1 | boi_CU:x24 | boi_CU:x15 | boi_MC:x8 | N/A | N/A | boi_SE:x80 | N/A | boi_ST:x206 |
| 11.7 | Thereof: credit issued for a person with a disabilities shortnes life/Fixed rate | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CL:x36 | boi_CS:x1 | boi_CU:x23 | N/A | boi_MC:x8 | N/A | N/A | boi_SE:x79 | N/A | boi_ST:x206 |
| 11.8 | Thereof: credit issued for a person with a disabilities shortnes life/Floating rate | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CL:x36 | boi_CS:x1 | boi_CU:x24 | N/A | boi_MC:x8 | N/A | N/A | boi_SE:x79 | N/A | boi_ST:x206 |
| 11.9 | Thereof: credit issued for a person with a disabilities shortnes life/Performance | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CL:x36 | boi_CS:x1 | N/A | N/A | boi_MC:x8 | N/A | N/A | boi_SE:x16 | N/A | boi_ST:x206 |
| 11.10 | Thereof: credit issued for a person with a disabilities shortnes life/No. of loans | boi_met:id102 | xbrli:integerItemType | instant | boi_BC:x1 | N/A | boi_CL:x36 | boi_CS:x1 | N/A | N/A | boi_MC:x8 | N/A | N/A | boi_SE:x16 | N/A | boi_ST:x206 |
| 11.11 | Thereof: credit issued for a person with a disabilities shortnes life/Performance | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CL:x36 | boi_CS:x1 | N/A | N/A | boi_MC:x8 | N/A | boi_PU:x1 | boi_SE:x16 | N/A | boi_ST:x206 |
| 11.12 | Thereof: credit issued for a person with a disabilities shortnes life/No. of loans | boi_met:id102 | xbrli:integerItemType | instant | boi_BC:x1 | N/A | boi_CL:x36 | boi_CS:x1 | N/A | N/A | boi_MC:x8 | N/A | boi_PU:x1 | boi_SE:x16 | N/A | boi_ST:x206 |
| 11.13 | Thereof: credit issued for a person with a disabilities shortnes life/Performance | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CL:x36 | boi_CS:x1 | N/A | N/A | boi_MC:x8 | N/A | boi_PU:x31 | boi_SE:x16 | N/A | boi_ST:x206 |
| 11.14 | Thereof: credit issued for a person with a disabilities shortnes life/No. of loans | boi_met:id102 | xbrli:integerItemType | instant | boi_BC:x1 | N/A | boi_CL:x36 | boi_CS:x1 | N/A | N/A | boi_MC:x8 | N/A | boi_PU:x31 | boi_SE:x16 | N/A | boi_ST:x206 |
| 11.15 | Thereof: credit issued for a person with a disabilities shortnes life/Performance | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CL:x37 | boi_CS:x1 | N/A | N/A | boi_MC:x8 | N/A | N/A | boi_SE:x16 | N/A | boi_ST:x206 |
| 11.16 | Thereof: credit issued for a person with a disabilities shortnes life/No. of loans | boi_met:id102 | xbrli:integerItemType | instant | boi_BC:x1 | N/A | boi_CL:x37 | boi_CS:x1 | N/A | N/A | boi_MC:x8 | N/A | N/A | boi_SE:x16 | N/A | boi_ST:x206 |
| 12.1 | Credit recycled/Fixed rate | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CL:x36 | boi_CS:x1 | boi_CU:x23 | boi_CU:x5 | boi_MC:x8 | N/A | N/A | boi_SE:x80 | N/A | boi_ST:x25 |
| 12.2 | Credit recycled/Floating rate | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CL:x36 | boi_CS:x1 | boi_CU:x24 | boi_CU:x5 | boi_MC:x8 | N/A | N/A | boi_SE:x80 | N/A | boi_ST:x25 |
| 12.3 | Credit recycled/Fixed rate | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CL:x36 | boi_CS:x1 | boi_CU:x23 | boi_CU:x6 | boi_MC:x8 | N/A | N/A | boi_SE:x80 | N/A | boi_ST:x25 |
| 12.4 | Credit recycled/Floating rate | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CL:x36 | boi_CS:x1 | boi_CU:x24 | boi_CU:x6 | boi_MC:x8 | N/A | N/A | boi_SE:x80 | N/A | boi_ST:x25 |
| 12.5 | Credit recycled/Fixed rate | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CL:x36 | boi_CS:x1 | boi_CU:x23 | boi_CU:x15 | boi_MC:x8 | N/A | N/A | boi_SE:x80 | N/A | boi_ST:x25 |
| 12.6 | Credit recycled/Floating rate | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CL:x36 | boi_CS:x1 | boi_CU:x24 | boi_CU:x15 | boi_MC:x8 | N/A | N/A | boi_SE:x80 | N/A | boi_ST:x25 |
| 12.7 | Credit recycled/Fixed rate | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CL:x36 | boi_CS:x1 | boi_CU:x23 | N/A | boi_MC:x8 | N/A | N/A | boi_SE:x79 | N/A | boi_ST:x25 |
| 12.8 | Credit recycled/Floating rate | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CL:x36 | boi_CS:x1 | boi_CU:x24 | N/A | boi_MC:x8 | N/A | N/A | boi_SE:x79 | N/A | boi_ST:x25 |
| 12.9 | Credit recycled/Performance | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CL:x36 | boi_CS:x1 | N/A | N/A | boi_MC:x8 | N/A | N/A | boi_SE:x16 | N/A | boi_ST:x25 |
| 12.10 | Credit recycled/No. of loans | boi_met:id102 | xbrli:integerItemType | instant | boi_BC:x1 | N/A | boi_CL:x36 | boi_CS:x1 | N/A | N/A | boi_MC:x8 | N/A | N/A | boi_SE:x16 | N/A | boi_ST:x25 |
| 12.11 | Credit recycled/Performance | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CL:x36 | boi_CS:x1 | N/A | N/A | boi_MC:x8 | N/A | boi_PU:x1 | boi_SE:x16 | N/A | boi_ST:x25 |
| 12.12 | Credit recycled/No. of loans | boi_met:id102 | xbrli:integerItemType | instant | boi_BC:x1 | N/A | boi_CL:x36 | boi_CS:x1 | N/A | N/A | boi_MC:x8 | N/A | boi_PU:x1 | boi_SE:x16 | N/A | boi_ST:x25 |
| 12.13 | Credit recycled/Performance | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CL:x36 | boi_CS:x1 | N/A | N/A | boi_MC:x8 | N/A | boi_PU:x31 | boi_SE:x16 | N/A | boi_ST:x25 |
| 12.14 | Credit recycled/No. of loans | boi_met:id102 | xbrli:integerItemType | instant | boi_BC:x1 | N/A | boi_CL:x36 | boi_CS:x1 | N/A | N/A | boi_MC:x8 | N/A | boi_PU:x31 | boi_SE:x16 | N/A | boi_ST:x25 |
| 12.15 | Credit recycled/Performance | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CL:x37 | boi_CS:x1 | N/A | N/A | boi_MC:x8 | N/A | N/A | boi_SE:x16 | N/A | boi_ST:x25 |
| 12.16 | Credit recycled/No. of loans | boi_met:id102 | xbrli:integerItemType | instant | boi_BC:x1 | N/A | boi_CL:x37 | boi_CS:x1 | N/A | N/A | boi_MC:x8 | N/A | N/A | boi_SE:x16 | N/A | boi_ST:x25 |
| 13.1 | Thereof: recycling of problematic loans/Fixed rate | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CL:x36 | boi_CS:x1 | boi_CU:x23 | boi_CU:x5 | boi_MC:x8 | N/A | N/A | boi_SE:x80 | boi_ST:x2 | boi_ST:x25 |
| 13.2 | Thereof: recycling of problematic loans/Floating rate | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CL:x36 | boi_CS:x1 | boi_CU:x24 | boi_CU:x5 | boi_MC:x8 | N/A | N/A | boi_SE:x80 | boi_ST:x2 | boi_ST:x25 |
| 13.3 | Thereof: recycling of problematic loans/Fixed rate | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CL:x36 | boi_CS:x1 | boi_CU:x23 | boi_CU:x6 | boi_MC:x8 | N/A | N/A | boi_SE:x80 | boi_ST:x2 | boi_ST:x25 |
| 13.4 | Thereof: recycling of problematic loans/Floating rate | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CL:x36 | boi_CS:x1 | boi_CU:x24 | boi_CU:x6 | boi_MC:x8 | N/A | N/A | boi_SE:x80 | boi_ST:x2 | boi_ST:x25 |
| 13.5 | Thereof: recycling of problematic loans/Fixed rate | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CL:x36 | boi_CS:x1 | boi_CU:x23 | boi_CU:x15 | boi_MC:x8 | N/A | N/A | boi_SE:x80 | boi_ST:x2 | boi_ST:x25 |
| 13.6 | Thereof: recycling of problematic loans/Floating rate | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CL:x36 | boi_CS:x1 | boi_CU:x24 | boi_CU:x15 | boi_MC:x8 | N/A | N/A | boi_SE:x80 | boi_ST:x2 | boi_ST:x25 |
| 13.7 | Thereof: recycling of problematic loans/Fixed rate | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CL:x36 | boi_CS:x1 | boi_CU:x23 | N/A | boi_MC:x8 | N/A | N/A | boi_SE:x79 | boi_ST:x2 | boi_ST:x25 |
| 13.8 | Thereof: recycling of problematic loans/Floating rate | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CL:x36 | boi_CS:x1 | boi_CU:x24 | N/A | boi_MC:x8 | N/A | N/A | boi_SE:x79 | boi_ST:x2 | boi_ST:x25 |
| 13.9 | Thereof: recycling of problematic loans/Performance | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CL:x36 | boi_CS:x1 | N/A | N/A | boi_MC:x8 | N/A | N/A | boi_SE:x16 | boi_ST:x2 | boi_ST:x25 |
| 13.10 | Thereof: recycling of problematic loans/No. of loans | boi_met:id102 | xbrli:integerItemType | instant | boi_BC:x1 | N/A | boi_CL:x36 | boi_CS:x1 | N/A | N/A | boi_MC:x8 | N/A | N/A | boi_SE:x16 | boi_ST:x2 | boi_ST:x25 |
| 13.11 | Thereof: recycling of problematic loans/Performance | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CL:x36 | boi_CS:x1 | N/A | N/A | boi_MC:x8 | N/A | boi_PU:x1 | boi_SE:x16 | boi_ST:x2 | boi_ST:x25 |
| 13.12 | Thereof: recycling of problematic loans/No. of loans | boi_met:id102 | xbrli:integerItemType | instant | boi_BC:x1 | N/A | boi_CL:x36 | boi_CS:x1 | N/A | N/A | boi_MC:x8 | N/A | boi_PU:x1 | boi_SE:x16 | boi_ST:x2 | boi_ST:x25 |
| 13.13 | Thereof: recycling of problematic loans/Performance | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CL:x36 | boi_CS:x1 | N/A | N/A | boi_MC:x8 | N/A | boi_PU:x31 | boi_SE:x16 | boi_ST:x2 | boi_ST:x25 |
| 13.14 | Thereof: recycling of problematic loans/No. of loans | boi_met:id102 | xbrli:integerItemType | instant | boi_BC:x1 | N/A | boi_CL:x36 | boi_CS:x1 | N/A | N/A | boi_MC:x8 | N/A | boi_PU:x31 | boi_SE:x16 | boi_ST:x2 | boi_ST:x25 |
| 13.15 | Thereof: recycling of problematic loans/Performance | boi_met:md99 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CL:x37 | boi_CS:x1 | N/A | N/A | boi_MC:x8 | N/A | N/A | boi_SE:x16 | boi_ST:x2 | boi_ST:x25 |
| 13.16 | Thereof: recycling of problematic loans/No. of loans | boi_met:id102 | xbrli:integerItemType | instant | boi_BC:x1 | N/A | boi_CL:x37 | boi_CS:x1 | N/A | N/A | boi_MC:x8 | N/A | N/A | boi_SE:x16 | boi_ST:x2 | boi_ST:x25 |