Acquisition Acquisition (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Aug. 18, 2014	Aug. 11, 2014	Aug. 04, 2014	Dec. 31, 2012
Business Acquisition [Line Items]
Effective date of acquisition		Aug. 04, 2014
Date of acquisition agreement		Jul. 20, 2014
Acquisition purchase price	$ 0	$ 825,000	$ 0
Subordinated units converted to common units				6,273,970
Number of units sold in public offering		15,280,000
Net proceeds from issuance or sale of equity		$ 346,000
Number of units subject to underwriters' option					2,292,000
Date of exercise of underwriters' option		Aug. 11, 2014
Number of units sold to General Partner		1,390,290
General Partner capital contribution					$ 1,100	$ 7,300
General Partner percentage interest		2.00%
Goodwill	92,402	$ 233,548	72,161				$ 72,161
Financing expense	$ 0	(6,750)	$ 0
Compressor Systems, Inc. [Member]
Business Acquisition [Line Items]
Current assets						101,411
Property and equipment						571,706
Intangible assets						68,000
Goodwill						161,387
Total assets acquired						902,504
Current liabilities						77,504
Total liabilities assumed						77,504
Net assets acquired						$ 825,000
Revenues associated with acquired operations		152,500
Depreciation and amortization associated with acquired operations		25,200
Income before taxes associated with acquired operations		16,000
Transaction costs		5,500
Deferred financing costs		16,600
Financing expense		6,800
Business Acquisition, Pro Forma Information [Abstract]
Revenues		490,545
Depreciation and amortization		84,849
Net income		$ 13,624
Per unit information:
Basic		$ 0.54
Diluted		0.53
Net income per basic and diluted subordinated unit		$ 0.54