Federal Income Taxes - Tax Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Federal tax benefit at statutory tax rate	$ (810)	$ (655)	$ (548)
TRS state and local taxes, net of Federal benefit	(244)	(197)	(165)
Permanent differences, net	227	239	951
Prior year over-accrual, net	0	0	0
Effect of Tax Cuts and Jobs Act	0	0	0
Adjustment to deferred tax reserve	851	1,748	(1,530)
Other	(131)	(112)	1,702
REIT state and local income and franchise taxes	378	445	524
Total provision for income taxes	$ 271	$ 1,468	$ 934