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Inventory	6 Months Ended
Inventory	Jun. 30, 2015
Inventory Disclosure [Abstract]
Inventory	Inventory Inventory at June 30, 2015 and December 31, 2014, of $7.1 million and $6.5 million respectively, consisted primarily of spare parts and small equipment held for use in the ordinary course of business. Non-current inventory at June 30, 2015 and December 31, 2014 of $5.0 million and $5.5 million, respectively, consisted primarily of spare engines components kept on hand for certain of the Company's assets.