Derivative Instruments Schedule of Gains and Losses on Derivative Instruments (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Derivative [Line Items]
Net realized gains (losses) on periodic settements of interest rate swaps	$ 626	$ (1,856)
Net realized gains (losses) other than on periodic settements of interest rate swaps	48,370	(670)
Net realized gains (losses) on financial derivatives	48,996	(2,526)
Change in net unrealized gains (losses) on accrued periodic settlements on interest rate swaps	1,282	(355)
Change in Net Unrealized Gains (Losses) Other Than on Accrued Periodic Settlements of Interest Rate Swaps	57,251	8,955
Change in net unrealized gains (losses) on financial derivatives	58,533	8,600
Interest Rate Swap [Member]
Derivative [Line Items]
Net realized gains (losses) on periodic settements of interest rate swaps	626	(1,856)
Net realized gains (losses) other than on periodic settements of interest rate swaps	7,369	(3,218)
Net realized gains (losses) on financial derivatives	7,995	(5,074)
Change in net unrealized gains (losses) on accrued periodic settlements on interest rate swaps	1,282	(355)
Change in Net Unrealized Gains (Losses) Other Than on Accrued Periodic Settlements of Interest Rate Swaps	55,119	8,940
Change in net unrealized gains (losses) on financial derivatives	56,401	8,585
TBA securities [Member]
Derivative [Line Items]
Net realized gains (losses) other than on periodic settements of interest rate swaps	19,893	(1,150)
Net realized gains (losses) on financial derivatives	19,893	(1,150)
Change in Net Unrealized Gains (Losses) Other Than on Accrued Periodic Settlements of Interest Rate Swaps	2,345	(463)
Change in net unrealized gains (losses) on financial derivatives	2,345	(463)
Futures [Member]
Derivative [Line Items]
Net realized gains (losses) other than on periodic settements of interest rate swaps	21,108	3,698
Net realized gains (losses) on financial derivatives	21,108	3,698
Change in Net Unrealized Gains (Losses) Other Than on Accrued Periodic Settlements of Interest Rate Swaps	(213)	478
Change in net unrealized gains (losses) on financial derivatives	$ (213)	$ 478