Borrowings under Repurchase Agreements Schedule of Repurchase Agreements by Maturity (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Repurchase Agreements [Line Items]
Repurchase agreements	$ 842,455	$ 1,064,835
Debt, Weighted Average Interest Rate	3.70%	0.18%
Repurchase Agreement Counterparty, Weighted Average Maturity of Agreements	26 days	111 days
Agency Securities [Member]
Repurchase Agreements [Line Items]
Repurchase agreements	$ 827,736	$ 1,064,835
Debt, Weighted Average Interest Rate	3.67%	0.18%
Repurchase Agreement Counterparty, Weighted Average Maturity of Agreements	26 days	111 days
Non-Agency RMBS [Member]
Repurchase Agreements [Line Items]
Repurchase agreements	$ 14,719	$ 0
Debt, Weighted Average Interest Rate	5.64%	0.00%
Repurchase Agreement Counterparty, Weighted Average Maturity of Agreements	42 days	0 days
Maturity up to 30 days [Member] | Agency Securities [Member]
Repurchase Agreements [Line Items]
Repurchase agreements	$ 559,178	$ 162,089
Debt, Weighted Average Interest Rate	4.00%	0.18%
Repurchase Agreement Counterparty, Weighted Average Maturity of Agreements	14 days	13 days
Maturity up to 30 days [Member] | Non-Agency RMBS [Member]
Repurchase Agreements [Line Items]
Repurchase agreements	$ 4,748	$ 0
Debt, Weighted Average Interest Rate	5.33%	0.00%
Repurchase Agreement Counterparty, Weighted Average Maturity of Agreements	4 days	0 days
Maturity 31 to 60 days [Member] | Agency Securities [Member]
Repurchase Agreements [Line Items]
Repurchase agreements	$ 207,066	$ 235,321
Debt, Weighted Average Interest Rate	2.68%	0.21%
Repurchase Agreement Counterparty, Weighted Average Maturity of Agreements	43 days	43 days
Maturity 31 to 60 days [Member] | Non-Agency RMBS [Member]
Repurchase Agreements [Line Items]
Repurchase agreements	$ 3,503	$ 0
Debt, Weighted Average Interest Rate	5.88%	0.00%
Repurchase Agreement Counterparty, Weighted Average Maturity of Agreements	48 days	0 days
Maturity 61 to 90 days [Member] | Agency Securities [Member]
Repurchase Agreements [Line Items]
Repurchase agreements	$ 61,492	$ 114,931
Debt, Weighted Average Interest Rate	4.00%	0.18%
Repurchase Agreement Counterparty, Weighted Average Maturity of Agreements	73 days	72 days
Maturity 61 to 90 days [Member] | Non-Agency RMBS [Member]
Repurchase Agreements [Line Items]
Repurchase agreements	$ 6,468	$ 0
Debt, Weighted Average Interest Rate	5.73%	0.00%
Repurchase Agreement Counterparty, Weighted Average Maturity of Agreements	66 days	0 days
Maturity 91 to 120 days [Member] | Agency Securities [Member]
Repurchase Agreements [Line Items]
Repurchase agreements	$ 0	$ 104,361
Debt, Weighted Average Interest Rate	0.00%	0.17%
Repurchase Agreement Counterparty, Weighted Average Maturity of Agreements	0 days	106 days
Maturity 121 to 150 days [Member] [Member] | Agency Securities [Member]
Repurchase Agreements [Line Items]
Repurchase agreements	$ 0	$ 148,855
Debt, Weighted Average Interest Rate	0.00%	0.16%
Repurchase Agreement Counterparty, Weighted Average Maturity of Agreements	0 days	133 days
Maturity 151 to 180 days [Member] [Member] | Agency Securities [Member]
Repurchase Agreements [Line Items]
Repurchase agreements	$ 0	$ 56,337
Debt, Weighted Average Interest Rate	0.00%	0.15%
Repurchase Agreement Counterparty, Weighted Average Maturity of Agreements	0 days	163 days
Maturity 181 to 360 days [Member] | Agency Securities [Member]
Repurchase Agreements [Line Items]
Repurchase agreements	$ 0	$ 242,941
Debt, Weighted Average Interest Rate	0.00%	0.19%
Repurchase Agreement Counterparty, Weighted Average Maturity of Agreements	0 days	238 days