Summary of Significant Accounting Policies (Inventory) (Details) $ in Thousands	12 Months Ended
Dec. 31, 2015 USD ($) compressor	Dec. 31, 2014 USD ($) compressor
Accounting Policies [Abstract]
Inventory valuation reserves, deductions	$ 12	$ 225
Available-for-sale or rental, compressor units \| compressor	7	0
Raw materials	$ 20,726	$ 25,984
Finished goods	1,051	0
Work in process	5,945	6,640
Inventory, net	$ 27,722	$ 32,624

Carrying amount, net of reserves and adjustments, as of the balance sheet date of merchandise or goods which are partially completed. This inventory is generally comprised of raw materials, labor and factory overhead costs, which require further materials, labor and overhead to be converted into finished goods, and which generally require the use of estimates to determine percentage complete and pricing.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.6(a)(3))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 330
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SAB TOPIC 5.BB)
-URI http://asc.fasb.org/extlink&oid=27011343&loc=d3e100047-122729

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Staff Accounting Bulletin (SAB)
-Number Topic 5
-Section BB

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Balance Type:	debit
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