Intangible Assets (Intangible Assets) (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 4,944	$ 5,090
Accumulated Amortization	(4,807)	(4,817)
Net Carrying Amount	137	273
Trademarks [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	1,272	1,278
Accumulated Amortization	(1,135)	(1,084)
Net Carrying Amount	137	194
Contracts-Owned Equipment [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	3,672	3,812
Accumulated Amortization	$ (3,672)	(3,733)
Net Carrying Amount		$ 79