Investments - Amortized Cost and Estimated Fair Value - Available-for-Sale Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Debt Securities, Available-for-sale, Fair Value to Amortized Cost [Abstract]
Amortized Cost	$ 1,145,141
Amortized Cost (before ASU 2016-13)		$ 957,459
Gross Unrealized Gains	172	18,769
Gross Unrealized Losses	(75,879)	(2,914)
Allowance for Credit Losses	0
Allowance for Credit Losses (before ASU 2016-13)		0
Investment securities available for sale	1,069,434
Investment securities available for sale (before ASU 2016-13)		973,314
U.S. Government Agencies [Member]
Debt Securities, Available-for-sale, Fair Value to Amortized Cost [Abstract]
Amortized Cost	4,000
Amortized Cost (before ASU 2016-13)		1,546
Gross Unrealized Gains		28
Gross Unrealized Losses	(45)
Investment securities available for sale	3,955
Investment securities available for sale (before ASU 2016-13)		1,574
Mortgage-Backed Securities [Member]
Debt Securities, Available-for-sale, Fair Value to Amortized Cost [Abstract]
Amortized Cost	202,882
Amortized Cost (before ASU 2016-13)		303,912
Gross Unrealized Gains		4,772
Gross Unrealized Losses	(11,860)	(1,957)
Investment securities available for sale	191,022
Investment securities available for sale (before ASU 2016-13)		306,727
States and Political Subdivisions [Member]
Debt Securities, Available-for-sale, Fair Value to Amortized Cost [Abstract]
Amortized Cost	363,790
Amortized Cost (before ASU 2016-13)		290,729
Gross Unrealized Gains	53	13,807
Gross Unrealized Losses	(43,114)	(268)
Investment securities available for sale	320,729
Investment securities available for sale (before ASU 2016-13)		304,268
Corporate Bond [Member]
Debt Securities, Available-for-sale, Fair Value to Amortized Cost [Abstract]
Amortized Cost	59,768
Amortized Cost (before ASU 2016-13)		28,436
Gross Unrealized Gains		94
Gross Unrealized Losses	(5,432)	(1)
Investment securities available for sale	54,336
Investment securities available for sale (before ASU 2016-13)		28,529
Collateralized Loan Obligations [Member]
Debt Securities, Available-for-sale, Fair Value to Amortized Cost [Abstract]
Amortized Cost	514,701
Amortized Cost (before ASU 2016-13)		332,836
Gross Unrealized Gains	119	68
Gross Unrealized Losses	(15,428)	(688)
Investment securities available for sale	$ 499,392
Investment securities available for sale (before ASU 2016-13)		$ 332,216

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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Amortized cost of 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 of allowance for credit loss 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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