Debt Securities - Schedule of Available for Sale Securities (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022	Jan. 01, 2022
Schedule of Available-for-sale Securities
Amortized Cost	$ 1,049,380	$ 1,261,740
Gross Unrealized Gains	51	163
Gross Unrealized Losses	95,357	108,356
Allowance for Credit Loss related to Debt Securities	0	0
Debt securities available for sale	954,074	1,153,547
Schedule of Held-to-maturity Securities
Amortized cost	1,117,709	1,129,421
Gross Unrealized Gains	0	0
Gross Unrealized Losses	179,174	204,527
Allowance for Credit Loss related to Debt Securities	0	0
Fair Value	938,535	924,894
Collateralized loan obligations
Schedule of Available-for-sale Securities
Amortized Cost	54,224
Gross Unrealized Gains	0
Gross Unrealized Losses	150
Allowance for Credit Loss related to Debt Securities	0
Debt securities available for sale	54,074
Schedule of Held-to-maturity Securities
Amortized cost	0
Fair Value	0
U.S. Government agencies and corporations
Schedule of Available-for-sale Securities
Amortized Cost		7,598
Gross Unrealized Gains		0
Gross Unrealized Losses		253
Allowance for Credit Loss related to Debt Securities		0
Debt securities available for sale		7,345
State and political subdivisions
Schedule of Available-for-sale Securities
Amortized Cost	196,497	303,573
Gross Unrealized Gains	24	27
Gross Unrealized Losses	11,940	18,244
Allowance for Credit Loss related to Debt Securities	0	0
Debt securities available for sale	184,581	285,356
Schedule of Held-to-maturity Securities
Amortized cost	538,182	538,746
Gross Unrealized Gains	0	0	$ 200
Gross Unrealized Losses	71,250	88,349
Allowance for Credit Loss related to Debt Securities	0	0
Fair Value	466,932	450,397
Mortgage-backed securities
Schedule of Available-for-sale Securities
Amortized Cost	5,851	6,165
Gross Unrealized Gains	5	11
Gross Unrealized Losses	177	232
Allowance for Credit Loss related to Debt Securities	0	0
Debt securities available for sale	5,679	5,944
Schedule of Held-to-maturity Securities
Amortized cost	79,597	81,032
Gross Unrealized Gains	0	0
Gross Unrealized Losses	11,772	12,851	10
Allowance for Credit Loss related to Debt Securities	0	0
Fair Value	67,825	68,181
Collateralized mortgage obligations
Schedule of Available-for-sale Securities
Amortized Cost	168,135	172,568
Gross Unrealized Gains	0	0
Gross Unrealized Losses	23,469	25,375
Allowance for Credit Loss related to Debt Securities	0	0
Debt securities available for sale	144,666	147,193
Schedule of Held-to-maturity Securities
Amortized cost	499,930	509,643
Gross Unrealized Gains	0	0
Gross Unrealized Losses	96,152	103,327	$ 11,400
Allowance for Credit Loss related to Debt Securities	0	0
Fair Value	403,778	406,316
Corporate debt securities
Schedule of Available-for-sale Securities
Amortized Cost	624,673	771,836
Gross Unrealized Gains	22	125
Gross Unrealized Losses	59,621	64,252
Allowance for Credit Loss related to Debt Securities	0	0
Debt securities available for sale	$ 565,074	$ 707,709

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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