Property And Equipment (Property And Equipment) (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Property, Plant And Equipment [Line Items]
Property and equipment, gross	$ 2,067,485	$ 2,058,987
Less accumulated depreciation and amortization	1,221,195	1,051,018
Property and equipment, net	846,290	1,007,969
Land
Property, Plant And Equipment [Line Items]
Property and equipment, gross	19,893	19,071
Buildings and improvements
Property, Plant And Equipment [Line Items]
Property and equipment, gross	73,599	69,629
Well service units and equipment
Property, Plant And Equipment [Line Items]
Property and equipment, gross	488,003	483,644
Frac/test tanks
Property, Plant And Equipment [Line Items]
Property and equipment, gross	363,346	355,912
Pumping equipment
Property, Plant And Equipment [Line Items]
Property and equipment, gross	345,938	343,379
Fluid services equipment
Property, Plant And Equipment [Line Items]
Property and equipment, gross	268,249	277,902
Disposal facilities
Property, Plant And Equipment [Line Items]
Property and equipment, gross	166,371	157,519
Contract drilling equipment
Property, Plant And Equipment [Line Items]
Property and equipment, gross	112,068	110,510
Rental equipment
Property, Plant And Equipment [Line Items]
Property and equipment, gross	94,970	102,471
Light vehicles
Property, Plant And Equipment [Line Items]
Property and equipment, gross	67,521	70,414
Software
Property, Plant And Equipment [Line Items]
Property and equipment, gross	21,920	21,416
Other
Property, Plant And Equipment [Line Items]
Property and equipment, gross	16,672	16,324
Construction equipment
Property, Plant And Equipment [Line Items]
Property and equipment, gross	15,174	15,764
Brine and fresh water stations
Property, Plant And Equipment [Line Items]
Property and equipment, gross	$ 13,761	14,175
Aircraft
Property, Plant And Equipment [Line Items]
Property and equipment, gross		$ 857