Offsetting Assets and Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Derivative Assets
Gross  Amounts	$ 781	$ 715
Gross  Amounts  Offset in the Consolidated Balance  Sheets	0	0
Net Amounts of Assets  presented in  the Consolidated Balance  Sheets	781	715
Gross amounts not offset in the consolidated balance sheets, financial instruments	(214)	(197)
Gross amounts not offset in the consolidated balance sheets, cash collateral	0	0
Net Amount	567	518
Derivative Liabilities and Repurchase Agreements
Gross amounts, derivative liability, at fair value	121	61
Gross  amounts offset in the consolidated balance sheets, derivative liability, at fair value	0	0
Derivative liability, at fair value	121	61
Gross amounts not offset in the consolidated balance sheets, financial instruments, derivative liability, at fair value	0	(1)
Gross amounts not offset in the consolidated balance sheets, cash collateral, derivative liability, at fair value	(121)	(60)
Derivative liability, at fair value, net Amount	0	0
Gross amounts of repurchase agreements	171,290	193,117
Gross amounts offset in the consolidated balance sheets, repurchase agreements	0	0
Repurchase agreements, net	171,290	193,117
Gross amounts not offset in the consolidated balance sheets, financial instruments, repurchase agreements	(171,277)	(193,073)
Gross amounts not offset in the consolidated balance sheets, cash collateral, repurchase agreements	0	(44)
Repurchase agreements, net amount	13	0
Gross amounts of total liabilities	171,411	193,178
Gross amounts  offset in the consolidated balance  sheets, total liabilities	0	0
Total liabilities, net amounts of assets presented in consolidated balance sheets	171,411	193,178
Gross amounts not offset in the consolidated balance sheets, financial instruments, total liabilities	(171,277)	(193,074)
Gross amounts not offset in the consolidated balance sheets, cash collateral, total liability	(121)	(104)
Total liabilities, net amount	13	0
Fair value of investments pledged against repurchase agreements	246,500	288,300
Derivative Counterparties
Derivative Liabilities and Repurchase Agreements
Gross amounts not offset in the consolidated balance sheets, cash collateral, total liability	(1,400)	(3,200)
Agency and Non-Agency Interest-Only Strips, accounted for as derivatives included in MBS
Derivative Assets
Gross  Amounts	781	714
Gross  Amounts  Offset in the Consolidated Balance  Sheets	0	0
Net Amounts of Assets  presented in  the Consolidated Balance  Sheets	781	714
Gross amounts not offset in the consolidated balance sheets, financial instruments	(214)	(196)
Gross amounts not offset in the consolidated balance sheets, cash collateral	0	0
Net Amount	$ 567	518
Derivative asset, at fair value
Derivative Assets
Gross  Amounts		1
Gross  Amounts  Offset in the Consolidated Balance  Sheets		0
Net Amounts of Assets  presented in  the Consolidated Balance  Sheets		1
Gross amounts not offset in the consolidated balance sheets, financial instruments		(1)
Gross amounts not offset in the consolidated balance sheets, cash collateral		0
Net Amount		$ 0