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Investment Securities (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
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 |  | 196,400,000
Debt Securities, Available for Sale, Sold at Loss, Amortized Cost Amount |  |  | 112,500,000
Debt Securities, Available-for-sale, Realized Gain |  |  | 3,400,000
Debt Securities, Available-for-sale, Realized Loss |  |  | 64,000
Gain on equity securities, net | 2,955,000 | 5,011,000 | 2,182,000
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer | 413,070,000 | 73,431,000 |
Debt Securities, Available-for-sale, Allowance for Credit Loss | 0 |  |
Debt Securities, Available-for-sale, Unrealized Loss Position | 1,590,490,000 | 840,832,000 |
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss | 122,776,000 | 9,514,000 |
Debt Securities, Available-for-sale | 1,733,696,000 | 1,754,140,000 |
Debt Securities, Available-for-sale, Amortized Cost | 1,854,852,000 | 1,727,363,000 |
Deposits |  |  |
Investment [Line Items] |  |  |
Debt Securities, Available-for-sale, Amortized Cost | 452,200,000 | 396,300,000 |
Securities Sold under Agreements to Repurchase [Member] |  |  |
Investment [Line Items] |  |  |
Debt Securities, Available-for-sale | 313,100,000 | 334,900,000 |
Debt Securities, Available-for-sale, Amortized Cost | 353,000,000 | 327,900,000 |
Federal Home Loan Bank Advances [Member] |  |  |
Investment [Line Items] |  |  |
Debt Securities, Available-for-sale, Amortized Cost | 7,200,000 | 9,500,000 |
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 | 310,338,000 | 73,431,000 |
Debt Securities, Available-for-sale, Unrealized Loss Position | 756,761,000 | 407,084,000 |
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss | 82,638,000 | 8,088,000 |
Debt Securities, Available-for-sale | 756,761,000 | 854,463,000 |
Debt Securities, Available-for-sale, Amortized Cost | 839,399,000 | 849,114,000 |
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 | 84,400,000 |  |
Investments [Member] |  |  |
Investment [Line Items] |  |  |
Gain on equity securities, net | $ 601,000 | $ (552,000) | $ (239,000)

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