Property, Plant and Equipment (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2017	Dec. 31, 2016
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 1,269,409	$ 1,269,409	$ 1,293,269
Less: Accumulated depreciation	(771,625)	(771,625)	(726,245)
Total property, plant and equipment, net	497,784	497,784	567,024
Assets held-for-sale, net book value	4,100	4,100
Assets held-for-sale, recognized loss	300
Land
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	16,491	16,491	15,730
Land improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	9,346	$ 9,346	9,379
Land improvements | Minimum
Property, Plant and Equipment [Line Items]
Estimated useful lives (in years)		8 years
Land improvements | Maximum
Property, Plant and Equipment [Line Items]
Estimated useful lives (in years)		15 years
Buildings and improvements
Property, Plant and Equipment [Line Items]
Estimated useful lives (in years)		39 years
Property, plant and equipment, gross	119,971	$ 119,971	73,211
Rental machinery and equipment
Property, Plant and Equipment [Line Items]
Estimated useful lives (in years)		7 years
Property, plant and equipment, gross	930,443	$ 930,443	933,667
Machinery and equipment - other
Property, Plant and Equipment [Line Items]
Estimated useful lives (in years)		7 years
Property, plant and equipment, gross	56,321	$ 56,321	60,182
Furniture, fixtures and computers
Property, Plant and Equipment [Line Items]
Estimated useful lives (in years)		5 years
Property, plant and equipment, gross	26,280	$ 26,280	19,073
Automobiles and other vehicles
Property, Plant and Equipment [Line Items]
Estimated useful lives (in years)		5 years
Property, plant and equipment, gross	32,621	$ 32,621	36,796
Aircraft
Property, Plant and Equipment [Line Items]
Estimated useful lives (in years)		7 years
Property, plant and equipment, gross	0	$ 0	16,267
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	9,870	$ 9,870	8,027
Leasehold improvements | Minimum
Property, Plant and Equipment [Line Items]
Estimated useful lives (in years)		7 years
Leasehold improvements | Maximum
Property, Plant and Equipment [Line Items]
Estimated useful lives (in years)		15 years
Construction in progress - machinery and equipment and buildings
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 68,066	$ 68,066	$ 120,937