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Securities - Contractual Maturities of Debt Securities (Details) - USD ($) $ in Thousands | Jun. 30, 2023 | Dec. 31, 2022
--- | --- | ---
Amortized Cost |  |
Due in one year or less | $ 17,981 |
Due after one year through five years | 162,227 |
Due after five years through ten years | 27,160 |
Due after ten years | 11,426 |
Available-for-Sale Debt Securities With Maturities, Amortized Cost | 218,794 |
Amortized Cost | 1,071,876 | $ 1,104,105
Fair Value |  |
Due in one year or less | 17,624 |
Due after one year through five years | 148,717 |
Due after five years through ten years | 25,814 |
Due after ten years | 11,323 |
Available-for-Sale Debt Securities With Maturities, Fair Value | 203,478 |
Total Available-for-Sale Debt Securities, Fair Value | 969,425 | 1,001,784
Collateralized mortgage obligations of U.S. government corporations and agencies |  |
Amortized Cost |  |
Available-for-Sale Debt Securities With Fixed Maturities | 485,131 |
Amortized Cost | 485,131 | 482,039
Fair Value |  |
Available-for-Sale Debt Securities With Fixed Maturities | 428,889 |
Total Available-for-Sale Debt Securities, Fair Value | 428,889 | 428,407
Residential mortgage-backed securities of U.S. government corporations and agencies |  |
Amortized Cost |  |
Available-for-Sale Debt Securities With Fixed Maturities | 46,958 |
Amortized Cost | 46,958 | 49,418
Fair Value |  |
Available-for-Sale Debt Securities With Fixed Maturities | 39,780 |
Total Available-for-Sale Debt Securities, Fair Value | 39,780 | 41,587
Commercial mortgage-backed securities of U.S. government corporations and agencies |  |
Amortized Cost |  |
Available-for-Sale Debt Securities With Fixed Maturities | 320,993 |
Amortized Cost | 320,993 | 352,465
Fair Value |  |
Available-for-Sale Debt Securities With Fixed Maturities | 297,278 |
Total Available-for-Sale Debt Securities, Fair Value | $ 297,278 | $ 327,313

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- Definition Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in second through fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-3 + Details
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