Income Taxes (Schedule of Actual Income Expense of the TRS) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Tax Disclosure [Line Items]
Total income tax expense (benefit)	$ (35)	$ 27	$ (61)	$ (306)	$ 282	$ 8	$ 461	$ 186	$ (375)	$ 937	$ 335
TRS Leasing, Inc [Member]
Income Tax Disclosure [Line Items]
Computed "expected" income tax (benefit) expense									(1,893)	403	191
State income taxes, net of federal income tax (benefit) expense									(240)	62	40
(Decrease) increase in valuation allowance									1,383	(124)	29
Return to provision adjustments										431	(16)
Adjustment to state net operating losses									248
Other									22	(10)	8
Total income tax expense (benefit)									$ (480)	$ 762	$ 252