Borrowings (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Borrowings	$ 3,900,000	$ 3,950,000
Advance from Federal Home Loan Bank	2,400,000	3,800,000
FRB Bank Team Funding Program | Federal Reserve Bank Advances [Member]
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Other Short-Term Borrowings	$ 1,600,000	$ 200,000
Maximum
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
FHLB Advances Fixed Interest Rates	5.25%
Maximum | FRB Bank Team Funding Program | Federal Reserve Bank Advances [Member]
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Other short-term borrowings, interest rate	4.93%
Minimum
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
FHLB Advances Fixed Interest Rates	5.10%
Minimum | FRB Bank Team Funding Program | Federal Reserve Bank Advances [Member]
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Other short-term borrowings, interest rate	4.76%