Securities - Schedule of Debt Securities (Details) - USD ($)	Dec. 31, 2024	Dec. 31, 2023	Jan. 01, 2022
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 4,778,644,000	$ 5,161,904,000
Unrealized Gains	0	172,000
Unrealized Losses	(757,046,000)	(754,555,000)
Allowance for Credit Losses	0	0	$ 0
Fair Value	4,021,598,000	4,407,521,000
Government-sponsored residential mortgage-backed securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	3,099,328,000	3,302,165,000
Unrealized Gains	0	0
Unrealized Losses	(537,433,000)	(521,527,000)
Allowance for Credit Losses	0	0
Fair Value	2,561,895,000	2,780,638,000
Government-sponsored commercial mortgage-backed securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	1,362,519,000	1,326,029,000
Unrealized Gains	0	0
Unrealized Losses	(201,408,000)	(201,653,000)
Allowance for Credit Losses	0	0
Fair Value	1,161,111,000	1,124,376,000
U.S. Agency bonds
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	19,608,000	236,454,000
Unrealized Gains	0	0
Unrealized Losses	(1,936,000)	(20,443,000)
Allowance for Credit Losses	0	0
Fair Value	17,672,000	216,011,000
U.S. Treasury securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	99,784,000	99,552,000
Unrealized Gains	0	0
Unrealized Losses	(2,165,000)	(4,400,000)
Allowance for Credit Losses	0	0
Fair Value	97,619,000	95,152,000
State and municipal bonds and obligations
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	197,405,000	197,704,000
Unrealized Gains	0	172,000
Unrealized Losses	(14,104,000)	(6,532,000)
Allowance for Credit Losses	0	0
Fair Value	$ 183,301,000	$ 191,344,000