Property And Equipment - Property and Equipment (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Property, Plant And Equipment [Line Items]
Property and equipment, gross	$ 2,061,773	$ 2,067,485
Less accumulated depreciation and amortization	1,310,703	1,221,195
Property and equipment, net	751,070	846,290
Land
Property, Plant And Equipment [Line Items]
Property and equipment, gross	20,422	19,893
Buildings and improvements
Property, Plant And Equipment [Line Items]
Property and equipment, gross	75,359	73,599
Well service units and equipment
Property, Plant And Equipment [Line Items]
Property and equipment, gross	489,345	488,003
Frac equipment/test tanks
Property, Plant And Equipment [Line Items]
Property and equipment, gross	355,358	363,346
Pumping equipment
Property, Plant And Equipment [Line Items]
Property and equipment, gross	344,679	345,938
Fluid services equipment
Property, Plant And Equipment [Line Items]
Property and equipment, gross	268,778	268,249
Disposal facilities
Property, Plant And Equipment [Line Items]
Property and equipment, gross	163,015	166,371
Contract drilling equipment
Property, Plant And Equipment [Line Items]
Property and equipment, gross	112,690	112,068
Rental equipment
Property, Plant And Equipment [Line Items]
Property and equipment, gross	95,633	94,970
Light vehicles
Property, Plant And Equipment [Line Items]
Property and equipment, gross	67,419	67,521
Software
Property, Plant And Equipment [Line Items]
Property and equipment, gross	21,920	21,920
Other
Property, Plant And Equipment [Line Items]
Property and equipment, gross	16,335	16,672
Construction equipment
Property, Plant And Equipment [Line Items]
Property and equipment, gross	15,010	15,174
Brine and fresh water stations
Property, Plant And Equipment [Line Items]
Property and equipment, gross	$ 15,810	$ 13,761