Resale and Repurchase Agreements (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Balance Sheet Offsetting [Line Items]
Securities purchased under agreements to resell	$ 225,000	$ 450,000
Total resale agreements, subject to master netting arrangements
Balance Sheet Offsetting [Line Items]
Securities Purchased under Agreements to Resell, Gross	225,000	450,000
Securities Purchased under Agreements to Resell, Liability	0	0
Securities purchased under agreements to resell	225,000	450,000
Securities Purchased under Agreements to Resell, Not Subject to Master Netting Arrangement	0	0
Securities Purchased under Agreements to Resell, Collateral, Obligation to Return Securities	(225,000)	(450,000)
Securities Purchased under Agreements to Resell, Amount Offset Against Collateral	0	0
Total repurchase agreements, subject to master netting arrangements
Balance Sheet Offsetting [Line Items]
Securities Sold under Agreements to Repurchase, Gross	2,241,106	2,647,510
Securities Sold under Agreements to Repurchase, Asset	0	0
Securities Sold under Agreements to Repurchase	2,241,106	2,647,510
Securities Sold under Agreements to Repurchase, Not Subject to Master Netting Arrangement	0	0
Securities Sold under Agreements to Repurchase, Collateral, Right to Reclaim Securities	(2,241,106)	(2,647,510)
Securities Sold under Agreements to Repurchase, Amount Offset Against Collateral	$ 0	$ 0