Fair Value of Financial Instruments Level 3 (Details) - USD ($) $ in Thousands		3 Months Ended	9 Months Ended
		Sep. 30, 2022	Sep. 30, 2022
Non-Agency MBS
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance as of beginning of period		$ 613	$ 798
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss)	[1]	7	71
Principal payments		(527)	(734)
Balance as of end of period		182	182
Non-Agency MBS | Accretion (amortization)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Accretion (amortization)		103	189
Loans Receivable
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance as of beginning of period		3,412	4,268
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings	[1]	0	19
Principal payments		(335)	(1,163)
Balance as of end of period		3,073	3,073
Loans Receivable | Accretion (amortization)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Accretion (amortization)		$ (4)	$ (13)

[1] Change in fair value for mortgage loans is recorded within “unrealized gain (loss) on investments, net” in net income and change in fair value for other non-Agency MBS is recorded as unrealized gain (loss) in “other comprehensive income.”