Property And Equipment (Schedule Of Property, Plant And Equipment Under Capital Lease) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Property, Plant And Equipment [Line Items]
Property, plant and equipment under capital lease, gross	$ 230,496	$ 214,073
Less accumulated amortization	94,082	77,340
Property, plant and equipment under capital lease, net	136,414	136,733
Light vehicles
Property, Plant And Equipment [Line Items]
Property, plant and equipment under capital lease, gross	44,635	39,970
Contract drilling equipment
Property, Plant And Equipment [Line Items]
Property, plant and equipment under capital lease, gross	4,255	4,223
Well service units and equipment
Property, Plant And Equipment [Line Items]
Property, plant and equipment under capital lease, gross	966	1,554
Fluid services equipment
Property, Plant And Equipment [Line Items]
Property, plant and equipment under capital lease, gross	127,594	121,051
Pumping equipment
Property, Plant And Equipment [Line Items]
Property, plant and equipment under capital lease, gross	35,126	29,080
Construction equipment
Property, Plant And Equipment [Line Items]
Property, plant and equipment under capital lease, gross	730	1,005
Software
Property, Plant And Equipment [Line Items]
Property, plant and equipment under capital lease, gross	17,120	17,120
Other
Property, Plant And Equipment [Line Items]
Property, plant and equipment under capital lease, gross	$ 70	$ 70