Repurchase Agreements - Remaining Term to Maturity (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Assets and Associated Liabilities of Transfers Accounted for as Secured Borrowings [Line Items]
Repurchase agreements	$ 2,937,124	$ 2,644,405
Weighted Average Rate	4.92%	4.18%
WAVG Original Term to Maturity	73	84
Less than 30 days
Assets and Associated Liabilities of Transfers Accounted for as Secured Borrowings [Line Items]
Repurchase agreements	$ 1,288,034	$ 858,161
Weighted Average Rate	4.96%	4.44%
WAVG Original Term to Maturity	35	42
30 to 90 days
Assets and Associated Liabilities of Transfers Accounted for as Secured Borrowings [Line Items]
Repurchase agreements	$ 1,254,958	$ 1,786,244
Weighted Average Rate	4.88%	4.06%
WAVG Original Term to Maturity	78	104
91 to 180 days
Assets and Associated Liabilities of Transfers Accounted for as Secured Borrowings [Line Items]
Repurchase agreements	$ 394,132	$ 0
Weighted Average Rate	4.95%	0.00%
WAVG Original Term to Maturity	183	0