Debt Securities - Schedule of Available for Sale Securities (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022	Jan. 01, 2022
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 873,136	$ 1,261,740
Gross Unrealized Gains	199	163
Gross Unrealized Losses	78,201	108,356
Allowance for Credit Loss related to Debt Securities	0	0
Fair Value	795,134	1,153,547
Gross Unrealized Gains	0	0
Gross Unrealized Losses	179,927	204,527
Held to Maturity
Amortized Cost	1,075,190	1,129,421
Gross Unrealized Gains	0	0
Gross Unrealized Losses	179,927	204,527
Allowance for Credit Loss related to Debt Securities	0	0
Fair Value	895,263	924,894
U.S. Government agencies and corporations
Debt Securities, Available-for-sale [Line Items]
Amortized Cost		7,598
Gross Unrealized Gains		0
Gross Unrealized Losses		253
Allowance for Credit Loss related to Debt Securities		0
Fair Value		7,345
State and political subdivisions
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	139,482	303,573
Gross Unrealized Gains	2	27
Gross Unrealized Losses	9,345	18,244
Allowance for Credit Loss related to Debt Securities	0	0
Fair Value	130,139	285,356
Gross Unrealized Gains	0	0
Gross Unrealized Losses	65,932	88,349
Gain related to reclassification	200		$ 200
Held to Maturity
Amortized Cost	532,422	538,746
Gross Unrealized Gains	0	0
Gross Unrealized Losses	65,932	88,349
Allowance for Credit Loss related to Debt Securities	0	0
Fair Value	466,490	450,397
Gain related to reclassification	200		200
Mortgage-backed securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	5,448	6,165
Gross Unrealized Gains	5	11
Gross Unrealized Losses	142	232
Allowance for Credit Loss related to Debt Securities	0	0
Fair Value	5,311	5,944
Gross Unrealized Gains	0	0
Gross Unrealized Losses	11,635	12,851
Loss related to reclassification			36
Gain related to reclassification	(58)
Held to Maturity
Amortized Cost	74,904	81,032
Gross Unrealized Gains	0	0
Gross Unrealized Losses	11,635	12,851
Allowance for Credit Loss related to Debt Securities	0	0
Fair Value	63,269	68,181
Gain related to reclassification	(58)
Loss related to reclassification			36
Collateralized loan obligations
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	50,541
Gross Unrealized Gains	135
Gross Unrealized Losses	239
Allowance for Credit Loss related to Debt Securities	0
Fair Value	50,437
Held to Maturity
Amortized Cost	0
Fair Value	0
Collateralized mortgage obligations
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	190,304	172,568
Gross Unrealized Gains	0	0
Gross Unrealized Losses	21,108	25,375
Allowance for Credit Loss related to Debt Securities	0	0
Fair Value	169,196	147,193
Gross Unrealized Gains	0	0
Gross Unrealized Losses	102,360	103,327
Loss related to reclassification	9,700		11,900
Held to Maturity
Amortized Cost	467,864	509,643
Gross Unrealized Gains	0	0
Gross Unrealized Losses	102,360	103,327
Allowance for Credit Loss related to Debt Securities	0	0
Fair Value	365,504	406,316
Loss related to reclassification	9,700		$ 11,900
Corporate debt securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	487,361	771,836
Gross Unrealized Gains	57	125
Gross Unrealized Losses	47,367	64,252
Allowance for Credit Loss related to Debt Securities	0	0
Fair Value	$ 440,051	$ 707,709