Discontinued Operations, Goodwill, Impairment Loss

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- Definition

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

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-URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274

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- Definition

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 50

-Paragraph 1

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- Definition

Amount of accumulated impairment loss for an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (a,h)

-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267

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- Definition

Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585

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Goodwill and Other Intangible Assets Narrative (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Finite-Lived Intangible Assets [Line Items]
Amortization of intangibles		$ 9,582us-gaap_AmortizationOfIntangibleAssets	$ 8,709us-gaap_AmortizationOfIntangibleAssets	$ 7,634us-gaap_AmortizationOfIntangibleAssets
Impairment of goodwill	36,700us-gaap_GoodwillImpairmentLoss	36,666us-gaap_GoodwillImpairmentLoss	0us-gaap_GoodwillImpairmentLoss	192us-gaap_GoodwillImpairmentLoss
Goodwill	30,864us-gaap_Goodwill	30,864us-gaap_Goodwill	67,530us-gaap_Goodwill	53,093us-gaap_Goodwill
Accumulated goodwill impairment	42,231	42,231	5,565
Impairment loss		36,666	3,577
Ruckus
Finite-Lived Intangible Assets [Line Items]
Impairment of goodwill			3,600
Energy segment:
Finite-Lived Intangible Assets [Line Items]
Goodwill	28,693	28,693	65,359	52,939
Impairment loss		36,666	0
Sun Well
Finite-Lived Intangible Assets [Line Items]
Goodwill	18,100	18,100
Black Hawk
Finite-Lived Intangible Assets [Line Items]
Goodwill	10,600	10,600
Eagle Well and Sun Well
Finite-Lived Intangible Assets [Line Items]
Impairment of goodwill	30,400
Rogue
Finite-Lived Intangible Assets [Line Items]
Impairment of goodwill		$ 6,300