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Federal Home Loan Bank Advances - Summary of FHLB Advances (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Federal Home Loan Bank, Advances [Line Items]
FHLB advances (fixed rates 2.19% to 5.53%    and variable rates 5.33% to 5.36%) maturing   June 2024 to March 2044	$ 4,225,528	$ 4,300,528
Fair value hedge basis adjustments and unamortized prepayment fees	(32,489)	(19,847)
Federal Home Loan Bank advances	$ 4,193,039	$ 4,280,681
Minimum | FHLB Advances
Federal Home Loan Bank, Advances [Line Items]
Fixed rates	2.19%
Variable rates	5.33%
Maximum | FHLB Advances
Federal Home Loan Bank, Advances [Line Items]
Fixed rates	5.53%
Variable rates	5.36%

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Advances From Federal Home Loan Banks, Fair Value Hedge Basis adjustments And Unamortized Prepayment Fees

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Amount of borrowings as of the balance sheet date from the Federal Home Loan Bank, which are primarily used to cover shortages in the required reserve balance and liquidity shortages.

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Including both current and noncurrent portions, Federal Home Loan Bank borrowings initially due beyond one year or beyond the normal operating cycle if longer.

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The interest rate applicable to the portion of the carrying amount of long-term borrowings outstanding as of the balance sheet date, including current maturities, which accrues interest at a set, unchanging rate.

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