Repurchase Agreements - Remaining Term to Maturity (Details) - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024
Assets and Associated Liabilities of Transfers Accounted for as Secured Borrowings [Line Items]
Repurchase agreements	$ 8,600,143	$ 6,563,120
Weighted Average Rate	4.47%	4.80%
WAVG Original Term to Maturity	88	79
Less than 30 days
Assets and Associated Liabilities of Transfers Accounted for as Secured Borrowings [Line Items]
Repurchase agreements	$ 7,037,298	$ 1,742,440
Weighted Average Rate	4.49%	4.83%
WAVG Original Term to Maturity	67	68
30 to 90 days
Assets and Associated Liabilities of Transfers Accounted for as Secured Borrowings [Line Items]
Repurchase agreements	$ 0	$ 4,820,680
Weighted Average Rate	0.00%	4.78%
WAVG Original Term to Maturity	0	83
Maturity Greater than 90 Days
Assets and Associated Liabilities of Transfers Accounted for as Secured Borrowings [Line Items]
Repurchase agreements	$ 1,562,845	$ 0
Weighted Average Rate	4.37%	0.00%
WAVG Original Term to Maturity	184	0