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v3.23.2

Investment Securities (Narrative) (Details) - USD ($) | 6 Months Ended |
--- | --- | ---
Jun. 30, 2023 | Jun. 30, 2022 | Dec. 31, 2022
Schedule of Investments [Line Items] |  |  |
Other than Temporary Impairment Losses, Investments | $ 0 | $ 0 |
Debt Securities, Available-for-sale, Amortized Cost | 1,782,922,000 |  | $ 1,854,852,000
Debt Securities, Available-for-sale, Allowance for Credit Loss | $ 0 |  | 0
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent | 21.00% |  |
Debt Securities, Available for Sale, Sold at Gain, Amortized Cost Amount | $ 0 | $ 0 |
Debt Securities, Available-for-sale | 1,668,864,000 |  | 1,733,696,000
Debt Securities, Available-for-sale, Unrealized Loss Position | 1,484,240,000 |  | 1,590,490,000
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss | 115,776,000 |  | 122,776,000
Securities Available-for-Sale, 12 months or longer, Fair value | 1,279,229,000 |  | 413,070,000
U.S. Government Sponsored Entities Asset-Backed Securities [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Debt Securities, Available-for-sale, Amortized Cost | 769,715,000 |  | 839,399,000
Debt Securities, Available-for-sale | 687,378,000 |  | 756,761,000
Debt Securities, Available-for-sale, Unrealized Loss Position | 687,378,000 |  | 756,761,000
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss | 82,337,000 |  | 82,638,000
Securities Available-for-Sale, 12 months or longer, Fair value | 614,417,000 |  | 310,338,000
USGovernmentSponsored asset backed securities and US Treasury obligations |  |  |
Schedule of Investments [Line Items] |  |  |
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss | 84,200,000 |  |
Collateral Pledged [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Debt Securities, Available-for-sale, Restricted | $ 722,600,000 |  | $ 753,600,000

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