Securities - Schedule of Unrealized Loss and Fair Value on Investments (Details) $ in Thousands	Sep. 30, 2025 USD ($) security	Dec. 31, 2024 USD ($) security
Fair Value
Less Than 12 Months	$ 221,208	$ 717,899
12 Months or Longer	1,027,837	978,673
Total	1,249,045	1,696,572
Unrealized Losses
Less Than 12 Months	(2,249)	(7,996)
12 Months or Longer	(152,884)	(203,342)
Total	$ (155,133)	$ (211,338)
Number of individual securities | security	337	377
U.S. Treasury securities and obligations of U.S. government agencies
Fair Value
Less Than 12 Months	$ 313	$ 4,825
12 Months or Longer	14,493	18,060
Total	14,806	22,885
Unrealized Losses
Less Than 12 Months	(2)	(13)
12 Months or Longer	(430)	(509)
Total	(432)	(522)
Residential mortgage-backed securities and collateralized mortgage obligations of U.S. government-sponsored entities
Fair Value
Less Than 12 Months	175,515	648,967
12 Months or Longer	786,425	739,363
Total	961,940	1,388,330
Unrealized Losses
Less Than 12 Months	(2,115)	(7,578)
12 Months or Longer	(139,082)	(182,958)
Total	(141,197)	(190,536)
Commercial mortgage-backed securities and collateralized mortgage obligations of U.S. government-sponsored entities
Fair Value
Less Than 12 Months	274	13,200
12 Months or Longer	95,067	107,041
Total	95,341	120,241
Unrealized Losses
Less Than 12 Months	0	(222)
12 Months or Longer	(6,471)	(10,061)
Total	(6,471)	(10,283)
Private mortgage-backed securities and collateralized mortgage obligations
Fair Value
Less Than 12 Months	0	7,178
12 Months or Longer	81,657	101,242
Total	81,657	108,420
Unrealized Losses
Less Than 12 Months	0	(16)
12 Months or Longer	(5,582)	(8,366)
Total	(5,582)	(8,382)
CLOs
Fair Value
Less Than 12 Months	45,106	43,410
12 Months or Longer	44,532	7,596
Total	89,638	51,006
Unrealized Losses
Less Than 12 Months	(132)	(152)
12 Months or Longer	(177)	(14)
Total	(309)	(166)
Obligations of state and political subdivisions
Fair Value
Less Than 12 Months	0	319
12 Months or Longer	5,663	5,371
Total	5,663	5,690
Unrealized Losses
Less Than 12 Months	0	(15)
12 Months or Longer	(1,142)	(1,434)
Total	$ (1,142)	$ (1,449)