Securities, Available-for-Sale Securities (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Available-for-sale [Abstract]
Amortized cost	$ 1,430,605	$ 1,461,829
Gross unrealized gains	245	11,283
Gross unrealized losses	(174,624)	(17,683)
Fair value	1,256,226	1,455,429
U.S. Treasury and Government Agencies [Member]
Available-for-sale [Abstract]
Amortized cost	418,579	299,606
Gross unrealized gains	212	351
Gross unrealized losses	(36,859)	(4,187)
Fair value	381,932	295,770
State and Political Subdivisions [Member]
Available-for-sale [Abstract]
Amortized cost	326,746	334,218
Gross unrealized gains	32	5,524
Gross unrealized losses	(61,676)	(5,539)
Fair value	265,102	334,203
U.S. Government Sponsored Agency Mortgage-backed Securities [Member]
Available-for-sale [Abstract]
Amortized cost	593,917	733,467
Gross unrealized gains	1	5,107
Gross unrealized losses	(73,833)	(7,765)
Fair value	520,085	730,809
Asset-backed Securities [Member]
Available-for-sale [Abstract]
Amortized cost	91,363	94,538
Gross unrealized gains	0	301
Gross unrealized losses	(2,256)	(192)
Fair value	$ 89,107	$ 94,647

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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Amount, before tax, of unrealized loss 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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Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

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