Summary of Significant Accounting Policies (Details 1) (USD $)	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]
Rental revenues	$ 124,837,000	$ 95,892,000	$ 32,108,000	$ 29,810,000	$ 32,446,000	$ 29,964,000	$ 28,124,000	$ 30,767,000	$ 282,647,000	$ 121,301,000	$ 108,582,000
Rental expenses									62,214,000	4,691,000	3,682,000
Prior period reclassification of ad valorem tax expenses											1,500,000
Foreign currency exchange gains (losses)									(1,200,000)	(500,000)	(500,000)
Property, plant and equipment [Line Items]
Depreciation expense									37,052,000	14,349,000	13,227,000
Goodwill	233,623,000				72,161,000				233,623,000	72,161,000
Percentage of estimated fair value exceeding carrying value	4.00%								4.00%
Inventory, Work in Process and Raw Materials [Abstract]
Parts and supplies	43,202,000				13,859,000				43,202,000	13,859,000
Work in progress	69,928,000				170,000				69,928,000	170,000
Total inventories	113,130,000				14,029,000				113,130,000	14,029,000
Fair value of intangible assets acquired									66,800,000
Amortization expense of intangible assets									3,800,000	0	28,000
Future amortization expense, next 12 months	9,400,000								9,400,000
Future amortization expense, year two	8,700,000								8,700,000
Future amortization expense, year three	6,400,000								6,400,000
Future amortization expense, year four	4,700,000								4,700,000
Future amortization expense, year five	4,700,000								4,700,000
Automobiles and Trucks [Member]
Property, plant and equipment [Line Items]
Property, plant and equipment, useful life									3 years
Information Systems [Member]
Property, plant and equipment [Line Items]
Property, plant and equipment, useful life									3 years
Software [Member]
Property, plant and equipment [Line Items]
Property, plant and equipment, useful life									7 years
Depreciation expense									4,900,000
Minimum [Member]
Property, plant and equipment [Line Items]
Intangible assets other than goodwill, useful lives									2 years
Minimum [Member] | Compressors [Member]
Property, plant and equipment [Line Items]
Property, plant and equipment, useful life									12 years
Minimum [Member] | Other Equipment [Member]
Property, plant and equipment [Line Items]
Property, plant and equipment, useful life									3 years
Maximum [Member]
Property, plant and equipment [Line Items]
Intangible assets other than goodwill, useful lives									15 years
Maximum [Member] | Compressors [Member]
Property, plant and equipment [Line Items]
Property, plant and equipment, useful life									20 years
Maximum [Member] | Other Equipment [Member]
Property, plant and equipment [Line Items]
Property, plant and equipment, useful life									8 years
Weighted Average [Member]
Property, plant and equipment [Line Items]
Intangible assets other than goodwill, useful lives									10 years 100 days
PEMEX [Member]
Concentration Risk [Line Items]
Major customer, percentage of revenues									11.10%	21.70%	26.00%
BP [Member]
Concentration Risk [Line Items]
Major customer, percentage of revenues									10.10%	10.00%	10.20%
Service Agreements [Member]
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]
Rental revenues									95,979,000	12,674,000
Rental expenses									$ 52,819	$ 7,589