CONSOLIDATED STATEMENTS OF PARTNERS' CAPITAL (USD $) In Thousands, except Share data, unless otherwise specified	Partners' Capital Common Units	Partners' Capital General Partner Units	Treasury Units	Accumulated Other Comprehensive Loss	Total
Balance at Dec. 31, 2011	$ 420,960	$ 12,877	$ (758)	$ (9,313)	$ 423,766
Balance (in units) at Dec. 31, 2011	37,308,402	757,722
Balance (in units) at Dec. 31, 2011			(33,811)
Increase (Decrease) in Partners' Capital
Issuance of common units for vesting of phantom units (in units)	40,329
Treasury units purchased			(225)		(225)
Treasury units purchased (in units)			(9,819)
Net proceeds from issuance of common units	114,530				114,530
Net proceeds from issuance of common units (in units)	4,965,000
Proceeds from sale of general partner units to Exterran Holdings		2,426			2,426
Proceeds from sale of general partner units to Exterran Holdings (in units)		100,861
Acquisition of a portion of Exterran Holdings' U.S. contract operations business	(28,221)				(28,221)
Contribution of capital, net	15,053	39			15,092
Excess of purchase price of equipment over Exterran Holdings' cost of equipment	(10,330)	(682)			(11,012)
Cash distributions	(82,073)	(5,793)			(87,866)
Unit-based compensation expense	782				782
Interest rate swap gain (loss), net of reclassification to earnings				(1,679)	(1,679)
Amortization of terminated interest rate swaps				898	898
Net income	5,886	4,623			10,509
Balance at Dec. 31, 2012	436,587	13,490	(983)	(10,094)	439,000
Balance (in units) at Dec. 31, 2012	42,313,731	858,583
Balance (in units) at Dec. 31, 2012			(43,630)
Increase (Decrease) in Partners' Capital
Issuance of common units for vesting of phantom units (in units)	28,270
Treasury units purchased			(182)		(182)
Treasury units purchased (in units)			(7,287)
Acquisition of a portion of Exterran Holdings' U.S. contract operations business	158,417	3,233			161,650
Acquisition of a portion of Exterran Holdings' U.S. contract operations business (in units)	7,123,527	144,644
Transaction costs for registration of units	(68)				(68)
Contribution of capital, net	36,625	827			37,452
Excess of purchase price of equipment over Exterran Holdings' cost of equipment	(11,161)	(658)			(11,819)
Cash distributions	(99,115)	(8,081)			(107,196)
Unit-based compensation expense	1,154				1,154
Interest rate swap gain (loss), net of reclassification to earnings				5,004	5,004
Amortization of terminated interest rate swaps				2,737	2,737
Net income	56,054	7,969			64,023
Balance at Dec. 31, 2013	578,493	16,780	(1,165)	(2,353)	591,755
Balance (in units) at Dec. 31, 2013	49,465,528	1,003,227
Balance (in units) at Dec. 31, 2013			(50,917)		(50,917)
Increase (Decrease) in Partners' Capital
Issuance of common units for vesting of phantom units (in units)	48,494
Treasury units purchased			(312)		(312)
Treasury units purchased (in units)			(10,748)
Net proceeds from issuance of common units	169,471				169,471
Net proceeds from issuance of common units (in units)	6,210,000
Proceeds from sale of general partner units to Exterran Holdings		3,573			3,573
Proceeds from sale of general partner units to Exterran Holdings (in units)		125,994
Contribution of capital, net	7,960	73			8,033
Excess of purchase price of equipment over Exterran Holdings' cost of equipment	(19,725)	(1,110)			(20,835)
Cash distributions	(117,331)	(13,014)			(130,345)
Unit-based compensation expense	1,367				1,367
Interest rate swap gain (loss), net of reclassification to earnings				(4,752)	(4,752)
Amortization of terminated interest rate swaps				3,667	3,667
Net income	48,479	13,240			61,719
Balance at Dec. 31, 2014	$ 668,714	$ 19,542	$ (1,477)	$ (3,438)	$ 683,341
Balance (in units) at Dec. 31, 2014	55,724,022	1,129,221
Balance (in units) at Dec. 31, 2014			(61,665)		(61,665)