Fair Value of Financial Instruments Level 3 (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2021 USD ($)
Non-Agency MBS
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at the beginning of the period	$ 1,275
Change in fair value	195	[1]
Principal payments	(533)
Balance at the end of the period	798
Non-Agency MBS | Accretion (amortization)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Accretion (amortization)	251
Loans Receivable
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at the beginning of the period	6,264
Change in fair value	(131)	[1]
Principal payments	(2,101)
Balance at the end of the period	4,268
Loans Receivable | Accretion (amortization)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Accretion (amortization)	$ (26)

[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.”