| Item | Type | Period | Balance | Description | | Debt Securities, Held-to-maturity | text | | | |
| Debt Securities, Held-to-maturity | text | | | Disclosure of information about investment in debt security measured at amortized cost (held-to-maturity). |
| Financial Instrument | text | | | Information by type of financial instrument. |
| Schedule of Held-to-maturity Securities | text | | | Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. |
| Financial Instruments | | duration | | Instrument or contract that imposes a contractual obligation to deliver cash or another financial instrument or to exchange other financial instruments on potentially unfavorable terms and conveys a contractual right to receive cash or another financial instrument or to exchange other financial instruments on potentially favorable terms. |
| Debt Securities, Held-to-maturity, Fair Value, Total | $ | instant | debit | Fair value of investment in debt security measured at amortized cost (held-to-maturity). |
| Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss | $ | instant | debit | Amount of accumulated unrealized loss on investment in debt security measured at amortized cost (held-to-maturity). |
| Debt Securities, Held-to-maturity, Accumulated Unrecognized Gain | $ | instant | credit | Amount of accumulated unrecognized gain on investment in debt security measured at amortized cost (held-to-maturity). |
| Debt Securities, Held-to-maturity, Total | $ | instant | debit | Amount of investment in debt security measured at amortized cost (held-to-maturity). |
| Residential Mortgage Backed Securities | | duration | | Securities collateralized by residential real estate mortgage loans. |
| Commercial Mortgage Backed Securities | | duration | | Securities collateralized by commercial real estate mortgage loans. |
| Collateralized Mortgage Backed Securities | | duration | | Securities collateralized by mortgage loans. |
| US States and Political Subdivisions Debt Securities | | duration | | Bonds or similar securities issued by state, city, or local US governments or the agencies operated by state, city, or local governments. Debt securities issued by state governments may include bond issuances of US state authorities including, for example, but not limited to, housing authorities, dormitory authorities, and general obligations while debt securities issued by political subdivisions of US states would include, for example, debt issuances by county, borough, city, or municipal governments. |