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Securities - Amortized Cost and Fair Value of Securities by Contractual Maturity (Detail) - USD ($) $ in Thousands | Jun. 30, 2023 | Dec. 31, 2022
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Investments, Debt and Equity Securities [Abstract] |  |
Amortized Cost, Due in one year or less | $ 6,174 |
Amortized Cost, Due after one year through five years | 73,270 |
Amortized Cost, Due after five years through ten years | 40,195 |
Amortized Cost, Due after ten years | 305,282 |
Amortized Cost, Mortgage-backed securities | 256,457 |
Amortized Cost, Total securities available for sale | 681,378 | $ 682,351
Fair Value, Due in one year or less | 6,064 |
Fair Value, Due after one year through five years | 67,318 |
Fair Value, Due after five years through ten years | 37,579 |
Fair Value, Due after ten years | 280,338 |
Fair Value, Mortgage-backed securities | 225,999 |
Fair Value, Total securities available for sale | $ 617,298 | $ 615,402

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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 sixth through tenth 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 (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-3 + Details
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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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