Property And Equipment (Property And Equipment) (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Property, Plant And Equipment [Line Items]
Property and equipment, gross	$ 2,074,549	$ 2,058,987
Less accumulated depreciation and amortization	1,178,890	1,051,018
Property and equipment, net	895,659	1,007,969
Land
Property, Plant And Equipment [Line Items]
Property and equipment, gross	19,551	19,071
Buildings and improvements
Property, Plant And Equipment [Line Items]
Property and equipment, gross	72,813	69,629
Well service units and equipment
Property, Plant And Equipment [Line Items]
Property and equipment, gross	492,937	483,644
Fluid services equipment
Property, Plant And Equipment [Line Items]
Property and equipment, gross	269,660	277,902
Brine and fresh water stations
Property, Plant And Equipment [Line Items]
Property and equipment, gross	13,735	14,175
Frac equipment/test tanks
Property, Plant And Equipment [Line Items]
Property and equipment, gross	364,776	355,912
Pumping equipment
Property, Plant And Equipment [Line Items]
Property and equipment, gross	346,513	343,379
Construction equipment
Property, Plant And Equipment [Line Items]
Property and equipment, gross	14,983	15,764
Contract drilling equipment
Property, Plant And Equipment [Line Items]
Property and equipment, gross	112,258	110,510
Disposal facilities
Property, Plant And Equipment [Line Items]
Property and equipment, gross	166,800	157,519
Light vehicles
Property, Plant And Equipment [Line Items]
Property and equipment, gross	68,390	70,414
Rental equipment
Property, Plant And Equipment [Line Items]
Property and equipment, gross	93,629	102,471
Aircraft
Property, Plant And Equipment [Line Items]
Property and equipment, gross		857
Software
Property, Plant And Equipment [Line Items]
Property and equipment, gross	21,881	21,416
Other
Property, Plant And Equipment [Line Items]
Property and equipment, gross	$ 16,623	$ 16,324