Property And Equipment (Schedule Of Property, Plant And Equipment Under Capital Lease) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Property, Plant And Equipment [Line Items]
Property, plant and equipment under capital lease, gross	$ 258,005us-gaap_CapitalLeasedAssetsGross	$ 258,077us-gaap_CapitalLeasedAssetsGross
Less accumulated amortization	101,148	100,896
Property, plant and equipment under capital lease, net	156,857	157,181
Light vehicles
Property, Plant And Equipment [Line Items]
Property, plant and equipment under capital lease, gross	46,598	47,853
Contract drilling equipment
Property, Plant And Equipment [Line Items]
Property, plant and equipment under capital lease, gross	6,142	6,142
Well service units and equipment
Property, Plant And Equipment [Line Items]
Property, plant and equipment under capital lease, gross	819	883
Fluid services equipment
Property, Plant And Equipment [Line Items]
Property, plant and equipment under capital lease, gross	143,784	143,014
Pumping equipment
Property, Plant And Equipment [Line Items]
Property, plant and equipment under capital lease, gross	42,742	42,264
Construction equipment
Property, Plant And Equipment [Line Items]
Property, plant and equipment under capital lease, gross	730	730
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	$ 71

Amount before accumulated depreciation of leased physical assets used in the normal conduct of business to produce goods and services.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 840

-SubTopic 30

-Section 45

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6455314&loc=d3e45014-112735

+ Details

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- Definition

The total gross amount less the charge for the use of the long-lived depreciable assets subject to a lease meeting the criteria for capitalization.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 840

-SubTopic 30

-Section 50

-Paragraph 1

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=6455398&loc=d3e45280-112737

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- Definition

The cumulative amount of depreciation (related to capitalized assets classified as property, plant and equipment not otherwise defined in the taxonomy) that has been recognized in the income statement.

+ References

No definition available.

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