| r0.1 | label_boi_a2/Non-problematic | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | N/A | boi_MC:x8 | boi_RP:x24 | N/A | boi_ST:x1 | N/A |
| r0.2 | label_boi_a2/Performing | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | N/A | boi_MC:x8 | boi_RP:x24 | N/A | boi_ST:x215 | N/A |
| r0.3 | label_boi_a2/Nonperforming | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | N/A | boi_MC:x8 | boi_RP:x24 | N/A | boi_ST:x212 | N/A |
| r0.4 | label_boi_a2/Total | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | N/A | boi_MC:x8 | boi_RP:x24 | N/A | N/A | N/A |
| r0.5 | label_boi_a2/In arrears of 90 days or more | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | N/A | boi_MC:x8 | boi_RP:x24 | N/A | boi_ST:x215 | boi_TI:x2 |
| r0.6 | label_boi_a2/In arrears of 30 to 89 days | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | N/A | boi_MC:x8 | boi_RP:x24 | N/A | boi_ST:x218 | boi_TI:x1 |
| r0.99 | label_boi_a2/Of which:Perform Problem debts | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | N/A | boi_MC:x8 | boi_RP:x24 | N/A | boi_ST:x215 | boi_TI:x1 |
| r1.1 | Activity of borrowers in Israel/Non-problematic | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | N/A | boi_ST:x1 | N/A |
| r1.2 | Activity of borrowers in Israel/Performing | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | N/A | boi_ST:x215 | N/A |
| r1.3 | Activity of borrowers in Israel/Nonperforming | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | N/A | boi_ST:x212 | N/A |
| r1.4 | Activity of borrowers in Israel/Total | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | N/A | N/A | N/A |
| r1.5 | Activity of borrowers in Israel/In arrears of 90 days or more | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | N/A | boi_ST:x215 | boi_TI:x2 |
| r1.6 | Activity of borrowers in Israel/In arrears of 30 to 89 days | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | N/A | boi_ST:x218 | boi_TI:x1 |
| r1.99 | Activity of borrowers in Israel/Of which:Perform Problem debts | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | N/A | boi_ST:x215 | boi_TI:x1 |
| 1.1 | Construction and real estate - construction/Non-problematic | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x8 | boi_ST:x1 | N/A |
| 1.2 | Construction and real estate - construction/Performing | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x8 | boi_ST:x215 | N/A |
| 1.3 | Construction and real estate - construction/Nonperforming | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x8 | boi_ST:x212 | N/A |
| 1.4 | Construction and real estate - construction/Total | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x8 | N/A | N/A |
| 1.5 | Construction and real estate - construction/In arrears of 90 days or more | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x8 | boi_ST:x215 | boi_TI:x2 |
| 1.6 | Construction and real estate - construction/In arrears of 30 to 89 days | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x8 | boi_ST:x218 | boi_TI:x1 |
| 1.99 | Construction and real estate - construction/Of which:Perform Problem debts | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x8 | boi_ST:x215 | boi_TI:x1 |
| 2.1 | Construction and real estate - real estate activity/Non-problematic | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x7 | boi_ST:x1 | N/A |
| 2.2 | Construction and real estate - real estate activity/Performing | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x7 | boi_ST:x215 | N/A |
| 2.3 | Construction and real estate - real estate activity/Nonperforming | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x7 | boi_ST:x212 | N/A |
| 2.4 | Construction and real estate - real estate activity/Total | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x7 | N/A | N/A |
| 2.5 | Construction and real estate - real estate activity/In arrears of 90 days or more | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x7 | boi_ST:x215 | boi_TI:x2 |
| 2.6 | Construction and real estate - real estate activity/In arrears of 30 to 89 days | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x7 | boi_ST:x218 | boi_TI:x1 |
| 2.99 | Construction and real estate - real estate activity/Of which:Perform Problem debts | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x7 | boi_ST:x215 | boi_TI:x1 |
| 3.1 | Financial services/Non-problematic | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x36 | boi_ST:x1 | N/A |
| 3.2 | Financial services/Performing | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x36 | boi_ST:x215 | N/A |
| 3.3 | Financial services/Nonperforming | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x36 | boi_ST:x212 | N/A |
| 3.4 | Financial services/Total | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x36 | N/A | N/A |
| 3.5 | Financial services/In arrears of 90 days or more | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x36 | boi_ST:x215 | boi_TI:x2 |
| 3.6 | Financial services/In arrears of 30 to 89 days | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x36 | boi_ST:x218 | boi_TI:x1 |
| 3.99 | Financial services/Of which:Perform Problem debts | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x36 | boi_ST:x215 | boi_TI:x1 |
| 4.1 | Commercial - other/Non-problematic | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x13 | boi_ST:x1 | N/A |
| 4.2 | Commercial - other/Performing | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x13 | boi_ST:x215 | N/A |
| 4.3 | Commercial - other/Nonperforming | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x13 | boi_ST:x212 | N/A |
| 4.4 | Commercial - other/Total | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x13 | N/A | N/A |
| 4.5 | Commercial - other/In arrears of 90 days or more | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x13 | boi_ST:x215 | boi_TI:x2 |
| 4.6 | Commercial - other/In arrears of 30 to 89 days | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x13 | boi_ST:x218 | boi_TI:x1 |
| 4.99 | Commercial - other/Of which:Perform Problem debts | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x13 | boi_ST:x215 | boi_TI:x1 |
| 5.1 | Total commercial/Non-problematic | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x4 | boi_ST:x1 | N/A |
| 5.2 | Total commercial/Performing | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x4 | boi_ST:x215 | N/A |
| 5.3 | Total commercial/Nonperforming | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x4 | boi_ST:x212 | N/A |
| 5.4 | Total commercial/Total | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x4 | N/A | N/A |
| 5.5 | Total commercial/In arrears of 90 days or more | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x4 | boi_ST:x215 | boi_TI:x2 |
| 5.6 | Total commercial/In arrears of 30 to 89 days | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x4 | boi_ST:x218 | boi_TI:x1 |
| 5.99 | Total commercial/Of which:Perform Problem debts | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x4 | boi_ST:x215 | boi_TI:x1 |
| 6.1 | Private individuals - housing loans/Non-problematic | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x35 | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x15 | boi_ST:x1 | N/A |
| 6.2 | Private individuals - housing loans/Performing | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x35 | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x15 | boi_ST:x215 | N/A |
| 6.3 | Private individuals - housing loans/Nonperforming | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x35 | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x15 | boi_ST:x212 | N/A |
| 6.4 | Private individuals - housing loans/Total | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x35 | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x15 | N/A | N/A |
| 6.5 | Private individuals - housing loans/In arrears of 90 days or more | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x35 | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x15 | boi_ST:x215 | boi_TI:x2 |
| 6.6 | Private individuals - housing loans/In arrears of 30 to 89 days | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x35 | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x15 | boi_ST:x218 | boi_TI:x1 |
| 6.99 | Private individuals - housing loans/Of which:Perform Problem debts | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x35 | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x15 | boi_ST:x215 | boi_TI:x1 |
| 7.1 | Private individuals - other/Non-problematic | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x38 | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x15 | boi_ST:x1 | N/A |
| 7.2 | Private individuals - other/Performing | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x38 | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x15 | boi_ST:x215 | N/A |
| 7.3 | Private individuals - other/Nonperforming | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x38 | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x15 | boi_ST:x212 | N/A |
| 7.4 | Private individuals - other/Total | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x38 | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x15 | N/A | N/A |
| 7.5 | Private individuals - other/In arrears of 90 days or more | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x38 | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x15 | boi_ST:x215 | boi_TI:x2 |
| 7.6 | Private individuals - other/In arrears of 30 to 89 days | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x38 | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x15 | boi_ST:x218 | boi_TI:x1 |
| 7.99 | Private individuals - other/Of which:Perform Problem debts | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | boi_CL:x38 | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x15 | boi_ST:x215 | boi_TI:x1 |
| 8.1 | Total public - activity in Israel/Non-problematic | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x16 | boi_ST:x1 | N/A |
| 8.2 | Total public - activity in Israel/Performing | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x16 | boi_ST:x215 | N/A |
| 8.3 | Total public - activity in Israel/Nonperforming | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x16 | boi_ST:x212 | N/A |
| 8.4 | Total public - activity in Israel/Total | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x16 | N/A | N/A |
| 8.5 | Total public - activity in Israel/In arrears of 90 days or more | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x16 | boi_ST:x215 | boi_TI:x2 |
| 8.6 | Total public - activity in Israel/In arrears of 30 to 89 days | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x16 | boi_ST:x218 | boi_TI:x1 |
| 8.99 | Total public - activity in Israel/Of which:Perform Problem debts | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x1 | boi_MC:x8 | boi_RP:x24 | boi_SE:x16 | boi_ST:x215 | boi_TI:x1 |
| r10.1 | Activity of borrowers abroad/Non-problematic | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x8 | boi_RP:x24 | N/A | boi_ST:x1 | N/A |
| r10.2 | Activity of borrowers abroad/Performing | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x8 | boi_RP:x24 | N/A | boi_ST:x215 | N/A |
| r10.3 | Activity of borrowers abroad/Nonperforming | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x8 | boi_RP:x24 | N/A | boi_ST:x212 | N/A |
| r10.4 | Activity of borrowers abroad/Total | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x8 | boi_RP:x24 | N/A | N/A | N/A |
| r10.5 | Activity of borrowers abroad/In arrears of 90 days or more | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x8 | boi_RP:x24 | N/A | boi_ST:x215 | boi_TI:x2 |
| r10.6 | Activity of borrowers abroad/In arrears of 30 to 89 days | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x8 | boi_RP:x24 | N/A | boi_ST:x218 | boi_TI:x1 |
| r10.99 | Activity of borrowers abroad/Of which:Perform Problem debts | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x8 | boi_RP:x24 | N/A | boi_ST:x215 | boi_TI:x1 |
| 9.1 | Construction and real estate/Non-problematic | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x8 | boi_RP:x24 | boi_SE:x8 | boi_ST:x1 | N/A |
| 9.2 | Construction and real estate/Performing | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x8 | boi_RP:x24 | boi_SE:x8 | boi_ST:x215 | N/A |
| 9.3 | Construction and real estate/Nonperforming | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x8 | boi_RP:x24 | boi_SE:x8 | boi_ST:x212 | N/A |
| 9.4 | Construction and real estate/Total | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x8 | boi_RP:x24 | boi_SE:x8 | N/A | N/A |
| 9.5 | Construction and real estate/In arrears of 90 days or more | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x8 | boi_RP:x24 | boi_SE:x8 | boi_ST:x215 | boi_TI:x2 |
| 9.6 | Construction and real estate/In arrears of 30 to 89 days | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x8 | boi_RP:x24 | boi_SE:x8 | boi_ST:x218 | boi_TI:x1 |
| 9.99 | Construction and real estate/Of which:Perform Problem debts | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x8 | boi_RP:x24 | boi_SE:x8 | boi_ST:x215 | boi_TI:x1 |
| 10.1 | Commercial - other/Non-problematic | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x8 | boi_RP:x24 | boi_SE:x365 | boi_ST:x1 | N/A |
| 10.2 | Commercial - other/Performing | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x8 | boi_RP:x24 | boi_SE:x365 | boi_ST:x215 | N/A |
| 10.3 | Commercial - other/Nonperforming | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x8 | boi_RP:x24 | boi_SE:x365 | boi_ST:x212 | N/A |
| 10.4 | Commercial - other/Total | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x8 | boi_RP:x24 | boi_SE:x365 | N/A | N/A |
| 10.5 | Commercial - other/In arrears of 90 days or more | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x8 | boi_RP:x24 | boi_SE:x365 | boi_ST:x215 | boi_TI:x2 |
| 10.6 | Commercial - other/In arrears of 30 to 89 days | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x8 | boi_RP:x24 | boi_SE:x365 | boi_ST:x218 | boi_TI:x1 |
| 10.99 | Commercial - other/Of which:Perform Problem debts | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x8 | boi_RP:x24 | boi_SE:x365 | boi_ST:x215 | boi_TI:x1 |
| 11.1 | Total commercial/Non-problematic | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x8 | boi_RP:x24 | boi_SE:x4 | boi_ST:x1 | N/A |
| 11.2 | Total commercial/Performing | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x8 | boi_RP:x24 | boi_SE:x4 | boi_ST:x215 | N/A |
| 11.3 | Total commercial/Nonperforming | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x8 | boi_RP:x24 | boi_SE:x4 | boi_ST:x212 | N/A |
| 11.4 | Total commercial/Total | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x8 | boi_RP:x24 | boi_SE:x4 | N/A | N/A |
| 11.5 | Total commercial/In arrears of 90 days or more | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x8 | boi_RP:x24 | boi_SE:x4 | boi_ST:x215 | boi_TI:x2 |
| 11.6 | Total commercial/In arrears of 30 to 89 days | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x8 | boi_RP:x24 | boi_SE:x4 | boi_ST:x218 | boi_TI:x1 |
| 11.99 | Total commercial/Of which:Perform Problem debts | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x8 | boi_RP:x24 | boi_SE:x4 | boi_ST:x215 | boi_TI:x1 |
| 12.1 | Private individuals/Non-problematic | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x8 | boi_RP:x24 | boi_SE:x15 | boi_ST:x1 | N/A |
| 12.2 | Private individuals/Performing | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x8 | boi_RP:x24 | boi_SE:x15 | boi_ST:x215 | N/A |
| 12.3 | Private individuals/Nonperforming | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x8 | boi_RP:x24 | boi_SE:x15 | boi_ST:x212 | N/A |
| 12.4 | Private individuals/Total | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x8 | boi_RP:x24 | boi_SE:x15 | N/A | N/A |
| 12.5 | Private individuals/In arrears of 90 days or more | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x8 | boi_RP:x24 | boi_SE:x15 | boi_ST:x215 | boi_TI:x2 |
| 12.6 | Private individuals/In arrears of 30 to 89 days | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x8 | boi_RP:x24 | boi_SE:x15 | boi_ST:x218 | boi_TI:x1 |
| 12.99 | Private individuals/Of which:Perform Problem debts | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x8 | boi_RP:x24 | boi_SE:x15 | boi_ST:x215 | boi_TI:x1 |
| 13.1 | Total public - activity abroad/Non-problematic | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x8 | boi_RP:x24 | boi_SE:x16 | boi_ST:x1 | N/A |
| 13.2 | Total public - activity abroad/Performing | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x8 | boi_RP:x24 | boi_SE:x16 | boi_ST:x215 | N/A |
| 13.3 | Total public - activity abroad/Nonperforming | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x8 | boi_RP:x24 | boi_SE:x16 | boi_ST:x212 | N/A |
| 13.4 | Total public - activity abroad/Total | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x8 | boi_RP:x24 | boi_SE:x16 | N/A | N/A |
| 13.5 | Total public - activity abroad/In arrears of 90 days or more | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x8 | boi_RP:x24 | boi_SE:x16 | boi_ST:x215 | boi_TI:x2 |
| 13.6 | Total public - activity abroad/In arrears of 30 to 89 days | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x8 | boi_RP:x24 | boi_SE:x16 | boi_ST:x218 | boi_TI:x1 |
| 13.99 | Total public - activity abroad/Of which:Perform Problem debts | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | boi_GA:x2 | boi_MC:x8 | boi_RP:x24 | boi_SE:x16 | boi_ST:x215 | boi_TI:x1 |
| 14.1 | Total/Non-problematic | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | N/A | boi_MC:x8 | boi_RP:x24 | boi_SE:x16 | boi_ST:x1 | N/A |
| 14.2 | Total/Performing | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | N/A | boi_MC:x8 | boi_RP:x24 | boi_SE:x16 | boi_ST:x215 | N/A |
| 14.3 | Total/Nonperforming | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | N/A | boi_MC:x8 | boi_RP:x24 | boi_SE:x16 | boi_ST:x212 | N/A |
| 14.4 | Total/Total | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | N/A | boi_MC:x8 | boi_RP:x24 | boi_SE:x16 | N/A | N/A |
| 14.5 | Total/In arrears of 90 days or more | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | N/A | boi_MC:x8 | boi_RP:x24 | boi_SE:x16 | boi_ST:x215 | boi_TI:x2 |
| 14.6 | Total/In arrears of 30 to 89 days | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | N/A | boi_MC:x8 | boi_RP:x24 | boi_SE:x16 | boi_ST:x218 | boi_TI:x1 |
| 14.99 | Total/Of which:Perform Problem debts | boi_met:mi2 | xbrli:monetaryItemType | instant | boi_BC:x1 | N/A | boi_CS:x2 | N/A | boi_MC:x8 | boi_RP:x24 | boi_SE:x16 | boi_ST:x215 | boi_TI:x1 |