FHLB Advances, Other Borrowings and Subordinated Notes - Schedule of FHLB Advances, Other Borrowings and Subordinated Notes (Details) - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024	Mar. 31, 2024
Debt Disclosure [Abstract]
FHLB advances	$ 3,151,309	$ 3,151,309	$ 2,676,751
Other borrowings:
Notes payable	135,632	142,763	164,153
Short-term borrowings	0	0	10,869
Secured borrowings	337,065	334,934	341,704
Other	56,572	57,106	58,682
Total other borrowings	529,269	534,803	575,408
Subordinated notes	298,360	298,283	437,965
Total FHLB advances, other borrowings and subordinated notes	$ 3,978,938	$ 3,984,395	$ 3,690,124