Income Taxes (Narrative) (Details) - TRS Leasing, Inc [Member] $ in Thousands	6 Months Ended
	Jun. 30, 2017 USD ($)
Income Tax Disclosure [Line Items]
Alternative minimum tax expense	$ 35
Net operating loss carryforward for federal income tax purposes	$ 2,020
Minimum [Member]
Income Tax Disclosure [Line Items]
Loss carryforwards expiration period	Dec. 31, 2022
Maximum [Member]
Income Tax Disclosure [Line Items]
Loss carryforwards expiration period	Dec. 31, 2035