Securities - Schedule of Unrealized Loss and Fair Value on Investments (Details) $ in Thousands	Jun. 30, 2026 USD ($) security	Dec. 31, 2025 USD ($) security
Fair Value
Less Than 12 Months	$ 2,475,869	$ 1,079,884
12 Months or Longer	650,790	961,014
Total	3,126,659	2,040,898
Unrealized Losses
Less Than 12 Months	(27,068)	(4,059)
12 Months or Longer	(109,046)	(146,326)
Total	$ (136,114)	$ (150,385)
Number of individual securities | security	477	383
U.S. Treasury securities and obligations of U.S. government agencies
Fair Value
Less Than 12 Months	$ 36,499	$ 21,846
12 Months or Longer	10,743	13,932
Total	47,242	35,778
Unrealized Losses
Less Than 12 Months	(504)	(31)
12 Months or Longer	(437)	(420)
Total	(941)	(451)
Residential mortgage-backed securities and collateralized mortgage obligations of U.S. government-sponsored entities
Fair Value
Less Than 12 Months	1,796,397	378,739
12 Months or Longer	431,657	730,551
Total	2,228,054	1,109,290
Unrealized Losses
Less Than 12 Months	(23,331)	(1,625)
12 Months or Longer	(97,837)	(133,763)
Total	(121,168)	(135,388)
Commercial mortgage-backed securities and collateralized mortgage obligations of U.S. government-sponsored entities
Fair Value
Less Than 12 Months	136,722	90,765
12 Months or Longer	77,674	95,090
Total	214,396	185,855
Unrealized Losses
Less Than 12 Months	(473)	(61)
12 Months or Longer	(4,513)	(5,867)
Total	(4,986)	(5,928)
Private mortgage-backed securities and collateralized mortgage obligations
Fair Value
Less Than 12 Months	894	969
12 Months or Longer	68,579	76,829
Total	69,473	77,798
Unrealized Losses
Less Than 12 Months	(1)	(1)
12 Months or Longer	(5,073)	(5,009)
Total	(5,074)	(5,010)
CLOs
Fair Value
Less Than 12 Months	284,100	211,052
12 Months or Longer	56,235	38,882
Total	340,335	249,934
Unrealized Losses
Less Than 12 Months	(575)	(320)
12 Months or Longer	(283)	(192)
Total	(858)	(512)
Obligations of state and political subdivisions
Fair Value
Less Than 12 Months	82,243	244,168
12 Months or Longer	5,902	5,730
Total	88,145	249,898
Unrealized Losses
Less Than 12 Months	(240)	(1,445)
12 Months or Longer	(903)	(1,075)
Total	(1,143)	(2,520)
Other debt securities
Fair Value
Less Than 12 Months	139,014	132,345
12 Months or Longer	0	0
Total	139,014	132,345
Unrealized Losses
Less Than 12 Months	(1,944)	(576)
12 Months or Longer	0	0
Total	$ (1,944)	$ (576)