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Federal Income Taxes - Tax Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Federal tax benefit at statutory tax rate	$ (655)	$ (548)	$ (1,225)
TRS state and local taxes, net of Federal benefit	(197)	(165)	(190)
Permanent differences, net	239	951	1,131
Prior year over-accrual, net	0	0	(1,541)
Effect of Tax Cuts and Jobs Act	0	0	1,982
Adjustment to deferred tax reserve	1,748	(1,530)	0
Other	(112)	1,702	404
REIT state and local income and franchise taxes	445	524	443
Total provision (benefit) for income taxes	$ 1,468	$ 934	$ 1,004

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