Securities - Schedule of Information Regarding Securities with Unrealized Losses (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Securities in an Unrealized Loss Position for Less than 12 Months
Fair Value, AFS and HTM	$ 1,117	$ 478,793
Unrealized Losses, AFS and HTM	5	33,147
Securities in an Unrealized Loss Position for More than 12 Months
Fair Value, AFS and HTM	2,628,150	2,263,197
Unrealized Losses, AFS and HTM	484,839	520,099
Total
Fair Value, AFS and HTM	2,629,267	2,741,990
Unrealized Losses, AFS and HTM	484,844	553,246
US Treasury Securities
Securities in an Unrealized Loss Position for Less than 12 Months
Fair Value, AFS	0	168,758
Unrealized Losses, AFS	0	5,662
Securities in an Unrealized Loss Position for More than 12 Months
Fair Value, AFS	172,570	0
Unrealized Losses, AFS	2,215	0
Total
Fair Value, AFS	172,570	168,758
Unrealized Losses, AFS	2,215	5,662
Government-sponsored enterprise securities
Securities in an Unrealized Loss Position for Less than 12 Months
Fair Value, AFS	0	0
Unrealized Losses, AFS	0	0
Securities in an Unrealized Loss Position for More than 12 Months
Fair Value, AFS	60,266	57,456
Unrealized Losses, AFS	11,698	14,501
Total
Fair Value, AFS	60,266	57,456
Unrealized Losses, AFS	11,698	14,501
Mortgage-backed securities
Securities in an Unrealized Loss Position for Less than 12 Months
Fair Value, AFS and HTM	1,117	221,006
Unrealized Losses, AFS and HTM	5	18,215
Securities in an Unrealized Loss Position for More than 12 Months
Fair Value, AFS and HTM	1,945,830	1,835,958
Unrealized Losses, AFS and HTM	386,553	405,557
Total
Fair Value, AFS and HTM	1,946,947	2,056,964
Unrealized Losses, AFS and HTM	386,558	423,772
Corporate bonds
Securities in an Unrealized Loss Position for Less than 12 Months
Fair Value, AFS	0	40,644
Unrealized Losses, AFS	0	947
Securities in an Unrealized Loss Position for More than 12 Months
Fair Value, AFS	17,008	886
Unrealized Losses, AFS	917	114
Total
Fair Value, AFS	17,008	41,530
Unrealized Losses, AFS	917	1,061
State and local governments
Securities in an Unrealized Loss Position for Less than 12 Months
Fair Value, HTM	0	48,385
Unrealized Losses, HTM	0	8,323
Securities in an Unrealized Loss Position for More than 12 Months
Fair Value, HTM	432,476	368,897
Unrealized Losses, HTM	83,456	99,927
Total
Fair Value, HTM	432,476	417,282
Unrealized Losses, HTM	$ 83,456	$ 108,250