FHLB Advances, Other Borrowings and Subordinated Notes - Schedule of FHLB Advances, Other Borrowings and Subordinated Notes (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023	Jun. 30, 2023
Debt Disclosure [Abstract]
FHLB advances	$ 3,176,309	$ 2,326,071	$ 2,026,071
Other borrowings:
Notes payable	157,024	171,282	185,539
Short-term borrowings	0	13,430	17,773
Secured borrowings	391,395	401,897	401,669
Other	58,160	59,204	60,238
Total other borrowings	606,579	645,813	665,219
Subordinated notes	298,113	437,866	437,628
Total FHLB advances, other borrowings and subordinated notes	$ 4,081,001	$ 3,409,750	$ 3,128,918