Income Taxes (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Tax Disclosure [Line Items]
Alternative minimum tax expense		$ 83	$ 20	$ 35
U.S. federal income tax rate		21.00%	34.00%	34.00%
Net operating loss carryforward for federal income tax purposes	$ 814	$ 1,004	$ 814
Tax expense resulted from the change in tax rate	$ 304
Minimum [Member]
Income Tax Disclosure [Line Items]
Tax year subject to examination		2015
Maximum [Member]
Income Tax Disclosure [Line Items]
Tax year subject to examination		2018
TRS Leasing, Inc [Member]
Income Tax Disclosure [Line Items]
Net operating loss carryforward for federal income tax purposes		$ 4,783
TRS Leasing, Inc [Member] | Minimum [Member]
Income Tax Disclosure [Line Items]
Loss carryforwards expiration period		Dec. 31, 2027
TRS Leasing, Inc [Member] | Maximum [Member]
Income Tax Disclosure [Line Items]
Loss carryforwards expiration period		Dec. 31, 2034