Repurchase Agreements - Remaining Term to Maturity (Details) - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024
Assets and Associated Liabilities of Transfers Accounted for as Secured Borrowings [Line Items]
Repurchase agreements	$ 7,234,723	$ 6,563,120
Weighted Average Rate	4.46%	4.80%
WAVG Original Term to Maturity	83	79
Less than 30 days
Assets and Associated Liabilities of Transfers Accounted for as Secured Borrowings [Line Items]
Repurchase agreements	$ 3,932,031	$ 1,742,440
Weighted Average Rate	4.47%	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	$ 2,997,548	$ 4,820,680
Weighted Average Rate	4.45%	4.78%
WAVG Original Term to Maturity	96	83
Maturity Greater than 90 Days
Assets and Associated Liabilities of Transfers Accounted for as Secured Borrowings [Line Items]
Repurchase agreements	$ 305,144	$ 0
Weighted Average Rate	4.40%	0.00%
WAVG Original Term to Maturity	152	0