Property And Equipment (Schedule Of Property, Plant And Equipment Under Capital Lease) (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Property, Plant And Equipment [Line Items]
Property, plant and equipment under capital lease, gross	$ 214,162	$ 214,073
Less accumulated amortization	87,759	77,340
Property, plant and equipment under capital lease, net	126,403	136,733
Light Vehicles
Property, Plant And Equipment [Line Items]
Property, plant and equipment under capital lease, gross	42,551	39,970
Contract Drilling [Member]
Property, Plant And Equipment [Line Items]
Property, plant and equipment under capital lease, gross	4,223	4,223
Well Service Units And Equipment
Property, Plant And Equipment [Line Items]
Property, plant and equipment under capital lease, gross	985	1,554
Fluid Services Equipment
Property, Plant And Equipment [Line Items]
Property, plant and equipment under capital lease, gross	119,870	121,051
Pumping Equipment
Property, Plant And Equipment [Line Items]
Property, plant and equipment under capital lease, gross	28,445	29,080
Construction Equipment
Property, Plant And Equipment [Line Items]
Property, plant and equipment under capital lease, gross	898	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