Repurchase Agreements (Details) - USD ($)	Dec. 31, 2023	Dec. 31, 2022
Assets and Associated Liabilities of Transfers Accounted for as Secured Borrowings [Line Items]
Repurchase agreements	$ 5,381,104,000	$ 2,644,405,000
Weighted Average Rate	5.59%	4.18%
Fair Value of Collateral Pledged	$ 5,880,747,000	$ 2,810,957,000
Securities Received as Collateral	176,300,000
Collateral Securities Repledged, Delivered, or Used	0
Accrued interest payable	53,194,000	16,450,000
Residential Mortgage Backed Securities [Member] | Agency MBS
Assets and Associated Liabilities of Transfers Accounted for as Secured Borrowings [Line Items]
Repurchase agreements	$ 5,130,438,000	$ 2,349,181,000
Weighted Average Rate	5.59%	4.15%
Fair Value of Collateral Pledged	$ 5,613,212,000	$ 2,496,781,000
Commercial Mortgage Backed Securities [Member] | Agency MBS
Assets and Associated Liabilities of Transfers Accounted for as Secured Borrowings [Line Items]
Repurchase agreements	$ 104,495,000	$ 108,580,000
Weighted Average Rate	5.60%	3.76%
Fair Value of Collateral Pledged	$ 113,753,000	$ 108,146,000
Interest-Only-Strip [Member] | Agency MBS
Assets and Associated Liabilities of Transfers Accounted for as Secured Borrowings [Line Items]
Repurchase agreements	$ 120,979,000	$ 137,569,000
Weighted Average Rate	5.83%	4.62%
Fair Value of Collateral Pledged	$ 127,823,000	$ 150,517,000
Interest-Only-Strip [Member] | Non-Agency MBS
Assets and Associated Liabilities of Transfers Accounted for as Secured Borrowings [Line Items]
Repurchase agreements	$ 25,192,000	$ 49,075,000
Weighted Average Rate	6.25%	5.26%
Fair Value of Collateral Pledged	$ 25,959,000	$ 55,513,000