Repurchase Agreements - Remaining Term to Maturity (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Assets and Associated Liabilities of Transfers Accounted for as Secured Borrowings [Line Items]
Repurchase agreements	$ 4,201,901	$ 2,644,405
Weighted Average Rate	5.26%	4.18%
WAVG Original Term to Maturity	122	84
Less than 30 days
Assets and Associated Liabilities of Transfers Accounted for as Secured Borrowings [Line Items]
Repurchase agreements	$ 1,069,565	$ 858,161
Weighted Average Rate	5.27%	4.44%
WAVG Original Term to Maturity	50	42
30 to 90 days
Assets and Associated Liabilities of Transfers Accounted for as Secured Borrowings [Line Items]
Repurchase agreements	$ 2,039,943	$ 1,786,244
Weighted Average Rate	5.24%	4.06%
WAVG Original Term to Maturity	130	104
91 to 180 days
Assets and Associated Liabilities of Transfers Accounted for as Secured Borrowings [Line Items]
Repurchase agreements	$ 1,092,393	$ 0
Weighted Average Rate	5.30%	0.00%
WAVG Original Term to Maturity	175	0