Property and Equipment - Property and Equipment Under Capital Leases (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Property, Plant And Equipment [Line Items]
Property, plant and equipment under capital lease, gross	$ 109,905	$ 48,934
Less accumulated amortization	(18,445)	0
Property, plant and equipment under capital lease, net	91,460	48,934
Fluid services equipment
Property, Plant And Equipment [Line Items]
Property, plant and equipment under capital lease, gross	40,097	29,372
Pumping equipment
Property, Plant And Equipment [Line Items]
Property, plant and equipment under capital lease, gross	56,225	12,806
Light vehicles
Property, Plant And Equipment [Line Items]
Property, plant and equipment under capital lease, gross	12,160	5,729
Contract drilling equipment
Property, Plant And Equipment [Line Items]
Property, plant and equipment under capital lease, gross	783	999
Well service units and equipment
Property, Plant And Equipment [Line Items]
Property, plant and equipment under capital lease, gross	262	0
Construction equipment
Property, Plant And Equipment [Line Items]
Property, plant and equipment under capital lease, gross	$ 378	$ 28