Intangible Assets (Intangible Assets) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 5,090	$ 5,315
Accumulated Amortization	(4,817)	(4,638)
Net Carrying Amount	273us-gaap_FiniteLivedIntangibleAssetsNet	677us-gaap_FiniteLivedIntangibleAssetsNet
Trademarks [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	1,278	1,278
Accumulated Amortization	(1,084)	(962)
Net Carrying Amount	194	316
Contracts Owned Equipment [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	3,812	4,037
Accumulated Amortization	(3,733)	(3,676)
Net Carrying Amount	$ 79	$ 361

Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 50

-Paragraph 2

-Subparagraph (a)(1)

-URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275

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Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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