| r0.1 | label_boi_a2/Quarter (Year -1) | boi_met:md13 | xbrli:monetaryItemType | instant | N/A | boi_CS:x2 | N/A | boi_MC:x125 | N/A | N/A | N/A | boi_RP:x19 | N/A |
| r0.2 | label_boi_a2/Accumulated from the beginning of year (-1) | boi_met:md13 | xbrli:monetaryItemType | instant | N/A | boi_CS:x2 | N/A | boi_MC:x125 | N/A | boi_MU:x1 | N/A | boi_RP:x19 | N/A |
| r1.1 | a. Interest income/Quarter (Year -1) | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x9 | boi_CS:x2 | N/A | boi_MC:x125 | N/A | N/A | N/A | boi_RP:x19 | N/A |
| r1.2 | a. Interest income/Accumulated from the beginning of year (-1) | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x9 | boi_CS:x2 | N/A | boi_MC:x125 | N/A | boi_MU:x1 | N/A | boi_RP:x19 | N/A |
| 1.1 | Credit to the public/Quarter (Year -1) | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x9 | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x8 | N/A | N/A | boi_RP:x19 | boi_SE:x16 |
| 1.2 | Credit to the public/Accumulated from the beginning of year (-1) | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x9 | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x8 | boi_MU:x1 | N/A | boi_RP:x19 | boi_SE:x16 |
| 2.1 | Credit to the government/Quarter (Year -1) | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x9 | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x8 | N/A | N/A | boi_RP:x19 | boi_SE:x11 |
| 2.2 | Credit to the government/Accumulated from the beginning of year (-1) | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x9 | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x8 | boi_MU:x1 | N/A | boi_RP:x19 | boi_SE:x11 |
| 3.1 | From Deposits with at the Bank of Israel and from cash/Quarter (Year -1) | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x9 | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x9 | N/A | N/A | boi_RP:x19 | boi_SE:x20 |
| 3.2 | From Deposits with at the Bank of Israel and from cash/Accumulated from the beginning of year (-1) | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x9 | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x9 | boi_MU:x1 | N/A | boi_RP:x19 | boi_SE:x20 |
| 4.1 | From Deposits with banks/Quarter (Year -1) | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x9 | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x8 | N/A | N/A | boi_RP:x19 | boi_SE:x26 |
| 4.2 | From Deposits with banks/Accumulated from the beginning of year (-1) | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x9 | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x8 | boi_MU:x1 | N/A | boi_RP:x19 | boi_SE:x26 |
| 5.1 | From Securities borrowed or bought under agreements to resale/Quarter (Year -1) | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x9 | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x28 | N/A | N/A | boi_RP:x19 | N/A |
| 5.2 | From Securities borrowed or bought under agreements to resale/Accumulated from the beginning of year (-1) | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x9 | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x28 | boi_MU:x1 | N/A | boi_RP:x19 | N/A |
| 6.1 | Bonds/Quarter (Year -1) | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x9 | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x15 | N/A | N/A | boi_RP:x19 | N/A |
| 6.2 | Bonds/Accumulated from the beginning of year (-1) | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x9 | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x15 | boi_MU:x1 | N/A | boi_RP:x19 | N/A |
| 7.1 | Of which:Interest income on accrual basis from mortgage-backed bonds/Quarter (Year -1) | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x9 | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x120 | N/A | N/A | boi_RP:x19 | N/A |
| 7.2 | Of which:Interest income on accrual basis from mortgage-backed bonds/Accumulated from the beginning of year (-1) | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x9 | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x120 | boi_MU:x1 | N/A | boi_RP:x19 | N/A |
| 8.1 | Other assets/Quarter (Year -1) | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x9 | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x41 | N/A | N/A | boi_RP:x19 | N/A |
| 8.2 | Other assets/Accumulated from the beginning of year (-1) | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x9 | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x41 | boi_MU:x1 | N/A | boi_RP:x19 | N/A |
| 9.1 | Total interest income/Quarter (Year -1) | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x9 | boi_CS:x2 | N/A | boi_MC:x125 | N/A | N/A | N/A | boi_RP:x19 | N/A |
| 9.2 | Total interest income/Accumulated from the beginning of year (-1) | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x9 | boi_CS:x2 | N/A | boi_MC:x125 | N/A | boi_MU:x1 | N/A | boi_RP:x19 | N/A |
| r11.1 | b. Interest expenses/Quarter (Year -1) | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x10 | boi_CS:x2 | N/A | boi_MC:x125 | N/A | N/A | N/A | boi_RP:x19 | N/A |
| r11.2 | b. Interest expenses/Accumulated from the beginning of year (-1) | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x10 | boi_CS:x2 | N/A | boi_MC:x125 | N/A | boi_MU:x1 | N/A | boi_RP:x19 | N/A |
| 10.1 | Deposits of the public/Quarter (Year -1) | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x10 | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x17 | N/A | N/A | boi_RP:x19 | boi_SE:x16 |
| 10.2 | Deposits of the public/Accumulated from the beginning of year (-1) | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x10 | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x17 | boi_MU:x1 | N/A | boi_RP:x19 | boi_SE:x16 |
| 11.1 | Deposits of the government/Quarter (Year -1) | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x10 | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x17 | N/A | N/A | boi_RP:x19 | boi_SE:x11 |
| 11.2 | Deposits of the government/Accumulated from the beginning of year (-1) | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x10 | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x17 | boi_MU:x1 | N/A | boi_RP:x19 | boi_SE:x11 |
| 12.1 | Deposits from the Bank of Israel/Quarter (Year -1) | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x10 | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x17 | N/A | N/A | boi_RP:x19 | boi_SE:x20 |
| 12.2 | Deposits from the Bank of Israel/Accumulated from the beginning of year (-1) | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x10 | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x17 | boi_MU:x1 | N/A | boi_RP:x19 | boi_SE:x20 |
| 13.1 | Deposits from banks/Quarter (Year -1) | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x10 | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x17 | N/A | N/A | boi_RP:x19 | boi_SE:x26 |
| 13.2 | Deposits from banks/Accumulated from the beginning of year (-1) | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x10 | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x17 | boi_MU:x1 | N/A | boi_RP:x19 | boi_SE:x26 |
| 14.1 | On Securities lent or sold under agreements repurchase/Quarter (Year -1) | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x10 | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x28 | N/A | N/A | boi_RP:x19 | N/A |
| 14.2 | On Securities lent or sold under agreements repurchase/Accumulated from the beginning of year (-1) | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x10 | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x28 | boi_MU:x1 | N/A | boi_RP:x19 | N/A |
| 15.1 | Bonds/Quarter (Year -1) | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x10 | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x15 | N/A | N/A | boi_RP:x19 | N/A |
| 15.2 | Bonds/Accumulated from the beginning of year (-1) | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x10 | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x15 | boi_MU:x1 | N/A | boi_RP:x19 | N/A |
| 16.1 | Other liabilities/Quarter (Year -1) | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x10 | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x20 | N/A | N/A | boi_RP:x19 | N/A |
| 16.2 | Other liabilities/Accumulated from the beginning of year (-1) | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x10 | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x20 | boi_MU:x1 | N/A | boi_RP:x19 | N/A |
| 17.1 | Total interest expenses/Quarter (Year -1) | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x10 | boi_CS:x2 | N/A | boi_MC:x125 | N/A | N/A | N/A | boi_RP:x19 | N/A |
| 17.2 | Total interest expenses/Accumulated from the beginning of year (-1) | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x10 | boi_CS:x2 | N/A | boi_MC:x125 | N/A | boi_MU:x1 | N/A | boi_RP:x19 | N/A |
| 18.1 | Total net interest income (expenses)/Quarter (Year -1) | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x11 | boi_CS:x2 | N/A | boi_MC:x125 | N/A | N/A | N/A | boi_RP:x19 | N/A |
| 18.2 | Total net interest income (expenses)/Accumulated from the beginning of year (-1) | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x11 | boi_CS:x2 | N/A | boi_MC:x125 | N/A | boi_MU:x1 | N/A | boi_RP:x19 | N/A |
| r21.1 | c. Details of net effect of derivative instruments/Quarter (Year -1) | boi_met:md13 | xbrli:monetaryItemType | instant | N/A | boi_CS:x2 | boi_EF:x2 | boi_MC:x125 | N/A | N/A | boi_PL:x11 | boi_RP:x19 | N/A |
| r21.2 | c. Details of net effect of derivative instruments/Accumulated from the beginning of year (-1) | boi_met:md13 | xbrli:monetaryItemType | instant | N/A | boi_CS:x2 | boi_EF:x2 | boi_MC:x125 | N/A | boi_MU:x1 | boi_PL:x11 | boi_RP:x19 | N/A |
| 19.1 | Interest income/Quarter (Year -1) | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x9 | boi_CS:x2 | boi_EF:x2 | boi_MC:x125 | N/A | N/A | boi_PL:x11 | boi_RP:x19 | N/A |
| 19.2 | Interest income/Accumulated from the beginning of year (-1) | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x9 | boi_CS:x2 | boi_EF:x2 | boi_MC:x125 | N/A | boi_MU:x1 | boi_PL:x11 | boi_RP:x19 | N/A |
| 20.1 | Interest expenses/Quarter (Year -1) | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x10 | boi_CS:x2 | boi_EF:x2 | boi_MC:x125 | N/A | N/A | boi_PL:x11 | boi_RP:x19 | N/A |
| 20.2 | Interest expenses/Accumulated from the beginning of year (-1) | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x10 | boi_CS:x2 | boi_EF:x2 | boi_MC:x125 | N/A | boi_MU:x1 | boi_PL:x11 | boi_RP:x19 | N/A |
| r24.1 | d. Details of interest income on an accrual basis from bonds/Quarter (Year -1) | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x9 | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x15 | N/A | N/A | boi_RP:x19 | N/A |
| r24.2 | d. Details of interest income on an accrual basis from bonds/Accumulated from the beginning of year (-1) | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x9 | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x15 | boi_MU:x1 | N/A | boi_RP:x19 | N/A |
| 21.1 | Held to maturity/Quarter (Year -1) | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x9 | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x15 | N/A | boi_PL:x5 | boi_RP:x19 | N/A |
| 21.2 | Held to maturity/Accumulated from the beginning of year (-1) | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x9 | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x15 | boi_MU:x1 | boi_PL:x5 | boi_RP:x19 | N/A |
| 22.1 | Available for sale/Quarter (Year -1) | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x9 | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x15 | N/A | boi_PL:x1 | boi_RP:x19 | N/A |
| 22.2 | Available for sale/Accumulated from the beginning of year (-1) | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x9 | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x15 | boi_MU:x1 | boi_PL:x1 | boi_RP:x19 | N/A |
| 23.1 | For trading/Quarter (Year -1) | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x9 | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x15 | N/A | boi_PL:x2 | boi_RP:x19 | N/A |
| 23.2 | For trading/Accumulated from the beginning of year (-1) | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x9 | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x15 | boi_MU:x1 | boi_PL:x2 | boi_RP:x19 | N/A |
| 24.1 | Current period/Quarter (Year -1) | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x9 | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x15 | N/A | N/A | boi_RP:x19 | N/A |
| 24.2 | Current period/Accumulated from the beginning of year (-1) | boi_met:md13 | xbrli:monetaryItemType | instant | boi_BC:x9 | boi_CS:x2 | N/A | boi_MC:x125 | boi_MC:x15 | boi_MU:x1 | N/A | boi_RP:x19 | N/A |