Offsetting Assets and Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Derivative Assets
Gross  Amounts	$ 2,476	$ 1,163
Gross  Amounts  Offset in the Consolidated Balance  Sheets	0	0
Net Amounts of Assets  presented in  the Consolidated Balance  Sheets	2,476	1,163
Gross Amounts Not Offset in the Consolidated Balance Sheets, Financial  Instruments	(571)	(1,163)
Gross Amounts Not Offset in the Consolidated Balance Sheets, Cash  Collateral	0	0
Net Amount	1,905	0
Derivative Liabilities and Repurchase Agreements
Gross amounts, derivative liability, at fair value	1,872	602
Gross  amounts offset in the consolidated balance sheets, derivative liability, at fair value	0	0
Derivative liability, at fair value	1,872	602
Gross amounts not offset in the consolidated balance sheets, financial instruments, derivative liability, at fair value	(365)	(105)
Gross amounts not offset in the consolidated balance sheets, cash collateral, derivative liability, at fair value	(1,467)	(497)
Derivative liability, at fair value, net Amount	40	0
Gross amounts of repurchase agreements	555,076	617,189
Gross amounts offset in the consolidated balance sheets, repurchase agreements	0	0
Repurchase agreements, net	555,076	617,189
Gross amounts not offset in the consolidated balance sheets, financial instruments, repurchase agreements	(555,010)	(617,189)
Gross amounts not offset in the consolidated balance sheets, cash collateral, repurchase agreements	(66)	0
Repurchase agreements, net amount	0	0
Gross amounts of total liabilities	556,948	617,791
Gross amounts  offset in the consolidated balance  sheets, total liabilities	0	0
Total liabilities, net amounts of assets presented in consolidated balance sheets	556,948	617,791
Gross amounts not offset in the consolidated balance sheets, financial instruments, total liabilities	(555,375)	(617,294)
Gross Amounts Not Offset in the Consolidated Balance Sheets, cash collateral, total liability	(1,533)	(497)
Total liabilities, net amount	40	0
Fair value of investments pledged against repurchase agreements	708,500	787,100
Derivative Counterparties
Derivative Liabilities and Repurchase Agreements
Gross Amounts Not Offset in the Consolidated Balance Sheets, cash collateral, total liability	(5,000)	(1,400)
Agency and Non-Agency Interest-Only Strips, accounted for as derivatives included in MBS
Derivative Assets
Gross  Amounts	728	1,058
Gross  Amounts  Offset in the Consolidated Balance  Sheets	0	0
Net Amounts of Assets  presented in  the Consolidated Balance  Sheets	728	1,058
Gross Amounts Not Offset in the Consolidated Balance Sheets, Financial  Instruments	(206)	(1,058)
Gross Amounts Not Offset in the Consolidated Balance Sheets, Cash  Collateral	0	0
Net Amount	522	0
Derivative asset, at fair value
Derivative Assets
Gross  Amounts	1,748	105
Gross  Amounts  Offset in the Consolidated Balance  Sheets	0	0
Net Amounts of Assets  presented in  the Consolidated Balance  Sheets	1,748	105
Gross Amounts Not Offset in the Consolidated Balance Sheets, Financial  Instruments	(365)	(105)
Gross Amounts Not Offset in the Consolidated Balance Sheets, Cash  Collateral	0	0
Net Amount	$ 1,383	$ 0