Investment Securities - Held-to-maturity Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	$ 408,039	$ 374,415
Allowance for Credit Losses	(238)	(286)
Gross Unrealized Gains	170	1,644
Gross Unrealized Losses	(81,514)	(5,818)
Fair Value	326,457	369,955
U.S. government sponsored agencies
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	59,871	36,431
Allowance for Credit Losses	0	0
Gross Unrealized Gains	0	86
Gross Unrealized Losses	(8,963)	(1,004)
Fair Value	50,908	35,513
States and political subdivisions
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	145,490	151,688
Allowance for Credit Losses	(238)	(286)
Gross Unrealized Gains	170	1,006
Gross Unrealized Losses	(37,969)	(2,270)
Fair Value	107,453	150,138
Residential mortgage-backed securities
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	111,707	110,708
Allowance for Credit Losses	0	0
Gross Unrealized Gains	0	370
Gross Unrealized Losses	(17,822)	(919)
Fair Value	93,885	110,159
Commercial mortgage-backed securities
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	90,971	75,588
Allowance for Credit Losses	0	0
Gross Unrealized Gains	0	182
Gross Unrealized Losses	(16,760)	(1,625)
Fair Value	$ 74,211	$ 74,145

Amount, excluding accrued interest, of allowance for credit loss on investment in debt security measured at amortized cost (held-to-maturity).

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-Publisher FASB
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Amount excluding accrued interest, before allowance for credit loss, of investment in debt security measured at amortized cost (held-to-maturity).

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