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Investment Securities - Securities Temporarily Impaired (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Debt Securities, Available-for-sale [Line Items]
Fair Value (Estimated) (Less than 12 months)	$ 251,182	$ 273,453
Unrealized Losses (Less than 12 months)	(23,126)	(6,144)
Fair Value (Estimated) (12 months or more)	310,159	55,942
Unrealized Losses (12 months or more)	(88,620)	(2,297)
Fair Value (Estimated)	561,341	329,395
Unrealized Losses	(111,746)	(8,441)
U.S. Government-sponsored agencies
Debt Securities, Available-for-sale [Line Items]
Fair Value (Estimated) (Less than 12 months)	4,804	24,030
Unrealized Losses (Less than 12 months)	(675)	(920)
Fair Value (Estimated) (12 months or more)	41,965	29,170
Unrealized Losses (12 months or more)	(16,680)	(1,375)
Fair Value (Estimated)	46,769	53,200
Unrealized Losses	(17,355)	(2,295)
Mortgage-backed securities
Debt Securities, Available-for-sale [Line Items]
Fair Value (Estimated) (Less than 12 months)	73,509	216,461
Unrealized Losses (Less than 12 months)	(6,486)	(4,768)
Fair Value (Estimated) (12 months or more)	197,102	26,772
Unrealized Losses (12 months or more)	(47,353)	(922)
Fair Value (Estimated)	270,611	243,233
Unrealized Losses	(53,839)	(5,690)
State and political subdivisions
Debt Securities, Available-for-sale [Line Items]
Fair Value (Estimated) (Less than 12 months)	149,517	29,528
Unrealized Losses (Less than 12 months)	(13,769)	(390)
Fair Value (Estimated) (12 months or more)	67,932	0
Unrealized Losses (12 months or more)	(24,247)	0
Fair Value (Estimated)	217,449	29,528
Unrealized Losses	(38,016)	(390)
Asset-backed securities
Debt Securities, Available-for-sale [Line Items]
Fair Value (Estimated) (Less than 12 months)	3,495
Unrealized Losses (Less than 12 months)	(53)
Fair Value (Estimated) (12 months or more)	0
Unrealized Losses (12 months or more)	0
Fair Value (Estimated)	3,495
Unrealized Losses	(53)
Corporate securities
Debt Securities, Available-for-sale [Line Items]
Fair Value (Estimated) (Less than 12 months)	19,857	3,434
Unrealized Losses (Less than 12 months)	(2,143)	(66)
Fair Value (Estimated) (12 months or more)	3,160	0
Unrealized Losses (12 months or more)	(340)	0
Fair Value (Estimated)	23,017	3,434
Unrealized Losses	$ (2,483)	$ (66)

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