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Securities - Fair Value of Debt Security, Available-for-sale and Held-to-maturity (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Debt and Equity Securities, FV-NI [Line Items]
Amortized cost, available for sale	$ 616,715	$ 618,790
Gross unrealized gains, available for sale	8	0
Gross unrealized losses, available for sale	(81,375)	(89,041)
Fair value, available for sale	535,348	529,749
Amortized cost, held to maturity	422,876	425,906
Gross unrealized gains, held to maturity	47	1
Gross unrealized losses, held to maturity	(64,550)	(72,006)
Fair value, held to maturity	358,373	353,901
U.S. Treasury Notes and Bonds [Member]
Debt and Equity Securities, FV-NI [Line Items]
Amortized cost, available for sale	90,695	90,810
Gross unrealized gains, available for sale	0	0
Gross unrealized losses, available for sale	(10,720)	(12,606)
Fair value, available for sale	79,975	78,204
U.S. Government and Federal Agency [Member]
Debt and Equity Securities, FV-NI [Line Items]
Fair value, available for sale	0
Amortized cost, held to maturity	2,968	2,966
Gross unrealized gains, held to maturity	0	0
Gross unrealized losses, held to maturity	(365)	(421)
Fair value, held to maturity	2,603	2,545
State and Municipal [Member]
Debt and Equity Securities, FV-NI [Line Items]
Amortized cost, available for sale	281,139	277,489
Gross unrealized gains, available for sale	0	0
Gross unrealized losses, available for sale	(44,641)	(47,551)
Fair value, available for sale	236,498	229,938
Amortized cost, held to maturity	199,267	201,890
Gross unrealized gains, held to maturity	1	1
Gross unrealized losses, held to maturity	(32,688)	(39,355)
Fair value, held to maturity	166,580	162,536
Mortgage-backed [Member]
Debt and Equity Securities, FV-NI [Line Items]
Amortized cost, available for sale	231,577	236,703
Gross unrealized gains, available for sale	8	0
Gross unrealized losses, available for sale	(25,448)	(28,140)
Fair value, available for sale	206,137	208,563
Amortized cost, held to maturity	199,795	200,473
Gross unrealized gains, held to maturity	0	0
Gross unrealized losses, held to maturity	(29,139)	(29,868)
Fair value, held to maturity	170,656	170,605
Corporate [Member]
Debt and Equity Securities, FV-NI [Line Items]
Amortized cost, available for sale	758	757
Gross unrealized gains, available for sale	0	0
Gross unrealized losses, available for sale	(42)	(46)
Fair value, available for sale	716	711
Amortized cost, held to maturity	19,990	19,603
Gross unrealized gains, held to maturity	46	0
Gross unrealized losses, held to maturity	(2,292)	(2,285)
Fair value, held to maturity	17,744	17,318
Asset-backed Securities [Member]
Debt and Equity Securities, FV-NI [Line Items]
Amortized cost, available for sale	12,546	13,031
Gross unrealized gains, available for sale	0	0
Gross unrealized losses, available for sale	(524)	(698)
Fair value, available for sale	12,022	12,333
Amortized cost, held to maturity	856	974
Gross unrealized gains, held to maturity	0	0
Gross unrealized losses, held to maturity	(66)	(77)
Fair value, held to maturity	$ 790	$ 897

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- Definition

Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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