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Investment Securities - Unrealized Gain (Loss) on Investments (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Available-for-sale debt securities:
Amortized Cost	$ 262,342	$ 63,184
Unrealized Gains	0	29
Unrealized Losses	24,464	351
Available for sale, at fair value	237,878	62,862
Held-to-maturity debt securities:
Amortized Cost	399,494	329,257
Unrealized Gains	0	2,904
Unrealized Losses	50,989	1,535
Fair Value	348,505	330,626
Amortized Cost	661,836	392,441
Unrealized Gains	0	2,933
Unrealized Losses	75,453	1,886
Fair Value	586,383	393,488
U.S. Treasury and U.S. government agencies
Available-for-sale debt securities:
Amortized Cost	36,528
Unrealized Gains	0
Unrealized Losses	1,614
Available for sale, at fair value	34,914
Held-to-maturity debt securities:
Amortized Cost	245,671	178,136
Unrealized Gains	0	26
Unrealized Losses	34,834	1,165
Fair Value	210,837	176,997
Mortgage-backed U.S. government agencies
Available-for-sale debt securities:
Amortized Cost	185,993	49,760
Unrealized Gains	0	3
Unrealized Losses	19,078	283
Available for sale, at fair value	166,915	49,480
Held-to-maturity debt securities:
Amortized Cost	50,710	61,157
Unrealized Gains	0	440
Unrealized Losses	6,676	272
Fair Value	44,034	61,325
State and political subdivision obligations
Available-for-sale debt securities:
Amortized Cost	4,354	3,899
Unrealized Gains	0	26
Unrealized Losses	815	11
Available for sale, at fair value	3,539	3,914
Held-to-maturity debt securities:
Amortized Cost	87,125	75,958
Unrealized Gains	0	2,305
Unrealized Losses	8,345	27
Fair Value	78,780	78,236
Corporate debt securities
Available-for-sale debt securities:
Amortized Cost	35,467	9,525
Unrealized Gains	0	0
Unrealized Losses	2,957	57
Available for sale, at fair value	32,510	9,468
Held-to-maturity debt securities:
Amortized Cost	15,988	14,006
Unrealized Gains	0	133
Unrealized Losses	1,134	71
Fair Value	$ 14,854	$ 14,068

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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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