Property and Equipment - Components of Property and Equipment (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Components of Property, Plant and Equipment
Property and equipment	$ 107,047	$ 105,117
Less accumulated depreciation	(32,720)	(30,426)
Property and equipment, net	74,327	74,691
Land
Components of Property, Plant and Equipment
Property and equipment	6,355	5,837
Buildings and leasehold improvements
Components of Property, Plant and Equipment
Property and equipment	43,152	42,986
Machinery, equipment and rental tools
Components of Property, Plant and Equipment
Property and equipment	37,031	36,187
Equipment in progress
Components of Property, Plant and Equipment
Property and equipment	3,827	3,235
Furniture and fixtures
Components of Property, Plant and Equipment
Property and equipment	1,983	1,969
Transportation equipment
Components of Property, Plant and Equipment
Property and equipment	2,730	3,059
Computer equipment and software
Components of Property, Plant and Equipment
Property and equipment	$ 11,969	$ 11,844