Borrowings (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Borrowings	$ 5,950,000	$ 906,175
Advance from Federal Home Loan Bank	5,900,000	$ 906,200
Line of Credit Facility, Maximum Borrowing Capacity	50,000
Short-Term Debt	$ 50,000
Short-Term Debt Interest Rate	6.38%
FHLB
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	$ 5,500,000
FRB
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	1,300,000
Federal funds with additional financial institutions
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	600,000
FRB Bank Team Funding Program
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	$ 2,300,000
Maximum
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
FHLB Advances Fixed Interest Rates	5.38%
Minimum
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
FHLB Advances Fixed Interest Rates	4.97%