Income Taxes (Schedule of Components of Income Tax Expense (Benefit)) (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]
Federal: Current
Federal: Deferred									(550)	817	202
State and local: Current										2	(8)
State and local: Deferred									70	(57)	58
Total income tax expense (benefit)									$ (480)	$ 762	$ 252