Intangible Assets (Intangible Assets) (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 5,298	$ 5,315
Accumulated Amortization	(4,822)	(4,638)
Net Carrying Amount	476	677
Trademarks [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	1,279	1,278
Accumulated Amortization	(1,026)	(962)
Net Carrying Amount	253	316
Contracts Owned Equipment [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	4,019	4,037
Accumulated Amortization	(3,796)	(3,676)
Net Carrying Amount	$ 223	$ 361