Securities - Schedule of Unrealized Loss and Fair Value on Investments (Details) $ in Thousands	Sep. 30, 2024 USD ($) security	Dec. 31, 2023 USD ($) security
Fair Value
Less Than 12 Months	$ 157,285	$ 215,988
12 Months or Longer	1,167,544	1,453,668
Total	1,324,829	1,669,656
Unrealized Losses
Less Than 12 Months	(589)	(11,128)
12 Months or Longer	(178,361)	(206,586)
Total	$ (178,950)	$ (217,714)
Number of individual securities | security	350	504
U.S. Treasury securities and obligations of U.S. government agencies
Fair Value
Less Than 12 Months	$ 372	$ 24,933
12 Months or Longer	20,513	3,594
Total	20,885	28,527
Unrealized Losses
Less Than 12 Months	(1)	(143)
12 Months or Longer	(334)	(335)
Total	(335)	(478)
Residential mortgage-backed securities and collateralized mortgage obligations of U.S. government-sponsored entities
Fair Value
Less Than 12 Months	103,020	91,867
12 Months or Longer	828,586	826,324
Total	931,606	918,191
Unrealized Losses
Less Than 12 Months	(449)	(9,320)
12 Months or Longer	(158,178)	(174,832)
Total	(158,627)	(184,152)
Commercial mortgage-backed securities and collateralized mortgage obligations of U.S. government-sponsored entities
Fair Value
Less Than 12 Months	0	24,251
12 Months or Longer	198,386	262,666
Total	198,386	286,917
Unrealized Losses
Less Than 12 Months	0	(1,270)
12 Months or Longer	(11,586)	(18,295)
Total	(11,586)	(19,565)
Private mortgage-backed securities and collateralized mortgage obligations
Fair Value
Less Than 12 Months	0	3,945
12 Months or Longer	106,748	119,475
Total	106,748	123,420
Unrealized Losses
Less Than 12 Months	0	(69)
12 Months or Longer	(7,028)	(10,842)
Total	(7,028)	(10,911)
Collateralized loan obligations
Fair Value
Less Than 12 Months	53,893	60,087
12 Months or Longer	7,723	232,545
Total	61,616	292,632
Unrealized Losses
Less Than 12 Months	(139)	(223)
12 Months or Longer	(19)	(1,188)
Total	(158)	(1,411)
Obligations of state and political subdivisions
Fair Value
Less Than 12 Months	0	326
12 Months or Longer	5,588	9,064
Total	5,588	9,390
Unrealized Losses
Less Than 12 Months	0	(2)
12 Months or Longer	(1,216)	(1,094)
Total	$ (1,216)	(1,096)
Other debt securities
Fair Value
Less Than 12 Months		10,579
12 Months or Longer		0
Total		10,579
Unrealized Losses
Less Than 12 Months		(101)
12 Months or Longer		0
Total		$ (101)