Property and Equipment - Property and Equipment and Related Accumulated Amortization Under Capital Leases (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Property, Plant And Equipment [Line Items]
Property, plant and equipment under capital lease, gross	$ 110,964	$ 109,905
Less accumulated amortization	24,793	18,445
Property and equipment under capital lease, net	86,171	91,460
Pumping equipment
Property, Plant And Equipment [Line Items]
Property, plant and equipment under capital lease, gross	56,578	56,225
Water logistics equipment
Property, Plant And Equipment [Line Items]
Property, plant and equipment under capital lease, gross	39,189	40,097
Light vehicles
Property, Plant And Equipment [Line Items]
Property, plant and equipment under capital lease, gross	13,895	12,160
Contract drilling equipment
Property, Plant And Equipment [Line Items]
Property, plant and equipment under capital lease, gross	783	783
Well service units and equipment
Property, Plant And Equipment [Line Items]
Property, plant and equipment under capital lease, gross	141	262
Construction equipment
Property, Plant And Equipment [Line Items]
Property, plant and equipment under capital lease, gross	$ 378	$ 378