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v3.22.1

Investment Securities (Narrative) (Details) - USD ($) | 3 Months Ended |
--- | --- | ---
Mar. 31, 2022 | Mar. 31, 2021 | Dec. 31, 2021
Schedule of Investments [Line Items] |  |  |
Other than Temporary Impairment Losses, Investments | $ 0 | $ 0 |
Debt Securities, Available-for-sale, Amortized Cost | 1,800,956,000 |  | $ 1,727,363,000
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 | 1,757,147,000 |  | 1,754,140,000
Debt Securities, Available-for-sale, Unrealized Loss Position | 1,296,490,000 |  | 840,832,000
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss | 51,691,000 |  | 9,514,000
Securities Available-for-Sale, 12 months or longer, Fair value | 149,376,000 |  | 73,431,000
U.S. Government Sponsored Entities Asset-Backed Securities [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Debt Securities, Available-for-sale, Amortized Cost | 870,576,000 |  | 849,114,000
Debt Securities, Available-for-sale | 834,802,000 |  | 854,463,000
Debt Securities, Available-for-sale, Unrealized Loss Position | 681,882,000 |  | 407,084,000
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss | 36,959,000 |  | 8,088,000
Securities Available-for-Sale, 12 months or longer, Fair value | 149,376,000 |  | 73,431,000
Collateral Pledged [Member] |  |  |
Schedule of Investments [Line Items] |  |  |
Debt Securities, Available-for-sale, Restricted | $ 690,400,000 |  | $ 733,700,000

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