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Investment Securities (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Investment [Line Items] |  |  |
Other than Temporary Impairment Losses, Investments | $ 0 | $ 0 | $ 0
Schedule of Repurchase Agreement Counterparties with Whom Repurchase Agreements Exceed 10 Percent of Stockholders' Equity [Table Text Block] | $ 0 |  |
Percentage of amount greater than shareholder's equity | 10.00% |  |
Debt Securities, Available for Sale, Sold at Gain, Amortized Cost Amount |  | 0 | 0
Debt Securities, Available for Sale, Sold at Loss, Amortized Cost Amount | $ 291,000,000 |  |
Debt Securities, Available-for-sale, Realized Loss | 7,875,000 | 0 | 0
Gain on equity securities, net | 971,000 | 2,955,000 | 5,011,000
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer | 1,150,640,000 | 413,070,000 |
Debt Securities, Available-for-sale, Allowance for Credit Loss | 0 |  |
Debt Securities, Available-for-sale, Unrealized Loss Position | 1,206,855,000 | 1,590,490,000 |
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss | 87,155,000 | 122,776,000 |
Debt Securities, Available-for-sale | 1,332,842,000 | 1,733,696,000 |
Debt Securities, Available-for-sale, Amortized Cost | 1,418,770,000 | 1,854,852,000 |
Equity Securities without Readily Determinable Fair Value, Upward Price Adjustment, Annual Amount | 0 | 871,000 |
Payments to Acquire Federal Home Loan Bank Stock | 18,228,000 | 0 | 0
Deposits |  |  |
Investment [Line Items] |  |  |
Debt Securities, Available-for-sale, Amortized Cost | 416,000,000 | 433,800,000 |
Securities Sold under Agreements to Repurchase [Member] |  |  |
Investment [Line Items] |  |  |
Debt Securities, Available-for-sale | 180,800,000 | 313,100,000 |
Debt Securities, Available-for-sale, Amortized Cost | 180,800,000 | 313,100,000 |
Federal Home Loan Bank Advances [Member] |  |  |
Investment [Line Items] |  |  |
Debt Securities, Available-for-sale, Amortized Cost | 5,200,000 | 6,800,000 |
US Government-sponsored Enterprises Debt Securities |  |  |
Investment [Line Items] |  |  |
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer |  | 0 |
Debt Securities, Available-for-sale, Unrealized Loss Position |  | 37,213,000 |
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss |  | 1,787,000 |
Debt Securities, Available-for-sale |  | 37,213,000 |
Debt Securities, Available-for-sale, Amortized Cost |  | 39,000,000 |
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] |  |  |
Investment [Line Items] |  |  |
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer | 634,261,000 | 310,338,000 |
Debt Securities, Available-for-sale, Unrealized Loss Position | 634,261,000 | 756,761,000 |
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss | 68,193,000 | 82,638,000 |
Debt Securities, Available-for-sale | 635,475,000 | 756,761,000 |
Debt Securities, Available-for-sale, Amortized Cost | 703,645,000 | 839,399,000 |
Obligations of U.S. Treasury and other U.S. Government sponsored entities |  |  |
Investment [Line Items] |  |  |
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss | 68,200,000 |  |
Investments [Member] |  |  |
Investment [Line Items] |  |  |
Gain on equity securities, net | $ 600,000 | $ 601,000 | $ 552,000

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