Mortgage Backed Securities (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
Jun. 30, 2020	Dec. 31, 2019
Mortgage Backed Securities
Fair Value	$ 75,411	$ 92,466
Mortgage backed securities
Mortgage Backed Securities
Weighted Average Interest Rate	4.20%	4.60%
Principal Balance	$ 121,902	$ 119,237
Amortized Cost	81,635	86,669
Fair Value	75,411	92,466
Gross Unrealized Gains	1,430	5,839
Gross Unrealized Losses	$ (7,654)	$ (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)	4.20%	4.70%
Mortgage Backed Securities Principal Balance
After five years through ten years	$ 104	$ 2,869
After ten years	121,798	116,368
Mortgage Backed Securities Amortized Cost
After five years through ten years	104	2,641
After ten years	81,531	84,028
Mortgage Backed Securities Estimated Fair Value
After five years through ten years	103	2,825
After ten years	$ 75,308	$ 89,641
Freddie Mac Loans
Mortgage Backed Securities
Weighted Average Interest Rate	3.80%	4.30%
Principal Balance	$ 74,806	$ 83,149
Amortized Cost	54,818	61,207
Fair Value	53,505	66,108
Gross Unrealized Gains	1,430	4,915
Gross Unrealized Losses	$ (2,743)	$ (14)
Commercial Loans
Mortgage Backed Securities
Weighted Average Interest Rate	4.80%	5.40%
Principal Balance	$ 46,992	$ 35,984
Amortized Cost	26,713	25,358
Fair Value	21,803	26,255
Gross Unrealized Gains		924
Gross Unrealized Losses	$ (4,910)	$ (27)
Tax Liens
Mortgage Backed Securities
Weighted Average Interest Rate	6.00%	6.00%
Principal Balance	$ 104	$ 104
Amortized Cost	104	104
Fair Value	103	103
Gross Unrealized Losses	$ (1)	$ (1)

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Amount of the contractual principal due at the origination of the mortgage loan (face amount) for loans maturing in the fifth through tenth fiscal year following the latest fiscal year.

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Amount of the contractual principal due at the origination of the mortgage loan (face amount) for loans maturing after the tenth fiscal year following the latest fiscal year.

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Weighted average interest rate of debt outstanding after five years through ten years.

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Amount of principal due at origination of mortgage loan within investment in mortgage loan on real estate by entity with substantial portion of business acquiring and holding investment real estate or interest in real estate.

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Weighted average interest rate of mortgage loan within investment in mortgage loan on real estate by entity with substantial portion of business acquiring and holding investment real estate or interest in real estate.

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Amount of accumulated unrecognized gain on investment in debt security measured at amortized cost (held-to-maturity).

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Amount of accumulated unrealized loss on investment in debt security measured at amortized cost (held-to-maturity).

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Amount, before other-than-temporary impairment (OTTI) accretion, of investment in debt securities measured at amortized cost (held-to-maturity).

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Fair value of investment in debt security measured at amortized cost (held-to-maturity), with single maturity date and allocated without single maturity date, maturing in sixth through tenth fiscal year following latest fiscal year. Excludes interim and annual periods when interim period is reported on rolling approach, from latest statement of financial position date.

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Fair value of investment in debt security measured at amortized cost (held-to-maturity), with single maturity date and allocated without single maturity date, maturing after tenth fiscal year following latest fiscal year. Excludes interim and annual periods when interim period is reported on rolling approach, from latest statement of financial position date.

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Fair value of securitized, pay-through debt securities collateralized by real estate mortgage loans classified as held-to-maturity.

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