Short-Term Borrowings and Long-Term Debt - Schedule of Debt (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Short-Term Debt [Line Items]
FHLB Advances - floating	$ 3,500,000	$ 0
Weighted-average contractual interest rates for FHLB advances	5.54%
Bank Term Funding Program
Short-Term Debt [Line Items]
Interest rate short-term borrowings	4.37%
Short-term borrowings	$ 0	$ 4,500,000
Parent Company | Junior Subordinated Debt
Short-Term Debt [Line Items]
Weighted-average rate (as a percent)	7.15%	6.87%
Long-term debt total	$ 31,844	$ 148,249
Minimum
Short-Term Debt [Line Items]
Interest Rates	5.51%
Maximum
Short-Term Debt [Line Items]
Interest Rates	5.58%