Mortgage Backed Securities (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Mortgage Backed Securities
Fair Value	$ 88,011	$ 92,466
Mortgage backed securities
Mortgage Backed Securities
Weighted Average Interest Rate	4.10%	4.60%
Principal Balance	$ 212,574	$ 119,237
Amortized Cost	91,636	86,669
Fair Value	88,011	92,466
Gross Unrealized Gains	2,106	5,839
Gross Unrealized Losses	$ (5,731)	$ (42)
Mortgage Backed Securities Weighted Average Interest Rate
After five years through ten years (as percent)	6.00%	3.80%
After ten years (as percent)	2.80%	4.70%
Mortgage Backed Securities Principal Balance
After five years through ten years	$ 92	$ 2,869
After ten years	212,482	116,368
Mortgage Backed Securities Amortized Cost
After five years through ten years	92	2,641
After ten years	91,544	84,028
Mortgage Backed Securities Estimated Fair Value
After five years through ten years	91	2,825
After ten years	$ 87,920	$ 89,641
Freddie Mac Loans
Mortgage Backed Securities
Weighted Average Interest Rate	3.70%	4.30%
Principal Balance	$ 139,408	$ 83,149
Amortized Cost	52,320	61,207
Fair Value	53,509	66,108
Gross Unrealized Gains	1,880	4,915
Gross Unrealized Losses	$ (691)	$ (14)
Commercial Loans
Mortgage Backed Securities
Weighted Average Interest Rate	4.50%	5.40%
Principal Balance	$ 73,074	$ 35,984
Amortized Cost	39,224	25,358
Fair Value	34,411	26,255
Gross Unrealized Gains	226	924
Gross Unrealized Losses	$ (5,039)	$ (27)
Tax Liens
Mortgage Backed Securities
Weighted Average Interest Rate	6.00%	6.00%
Principal Balance	$ 92	$ 104
Amortized Cost	92	104
Fair Value	91	103
Gross Unrealized Losses	$ (1)	$ (1)