Repurchase Agreements - Remaining Term to Maturity (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Assets and Associated Liabilities of Transfers Accounted for as Secured Borrowings [Line Items]
Repurchase agreements	$ 2,644,405	$ 2,849,916
Weighted Average Rate	4.18%	0.23%
WAVG Original Term to Maturity	84	198
Less than 30 days
Assets and Associated Liabilities of Transfers Accounted for as Secured Borrowings [Line Items]
Repurchase agreements	$ 858,161	$ 602,994
Weighted Average Rate	4.44%	0.42%
WAVG Original Term to Maturity	42	123
30 to 90 days
Assets and Associated Liabilities of Transfers Accounted for as Secured Borrowings [Line Items]
Repurchase agreements	$ 1,786,244	$ 763,302
Weighted Average Rate	4.06%	0.14%
WAVG Original Term to Maturity	104	166
91 to 180 days
Assets and Associated Liabilities of Transfers Accounted for as Secured Borrowings [Line Items]
Repurchase agreements	$ 0	$ 1,075,324
Weighted Average Rate	0.00%	0.15%
WAVG Original Term to Maturity	0	198
181 days to 1 year
Assets and Associated Liabilities of Transfers Accounted for as Secured Borrowings [Line Items]
Repurchase agreements	$ 0	$ 408,296
Weighted Average Rate	0.00%	0.30%
WAVG Original Term to Maturity	0	366