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.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 50

-Paragraph 1

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

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 45

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-URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266

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- Definition

Amount of other (increase) decrease 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 350

-SubTopic 20

-Section 50

-Paragraph 1

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Number of reporting units tested for impairment of goodwill. A reporting unit is an operating segment or one level below an operating segment.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

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Summary Of Significant Accounting Policies (Goodwill - Narrative and Schedule Of Goodwill) (Details) (USD $) In Thousands, unless otherwise specified	0 Months Ended	12 Months Ended
	Nov. 01, 2014 segment	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Goodwill [Line Items]
Number of reporting units	2us-gaap_NumberOfReportingUnits
Goodwill, Beginning Balance		$ 63,230us-gaap_Goodwill	$ 62,935us-gaap_Goodwill
Goodwill, Other Changes		(1,084)us-gaap_GoodwillOtherChanges	295us-gaap_GoodwillOtherChanges
Goodwill, Ending Balance		62,146us-gaap_Goodwill	63,230us-gaap_Goodwill
Well Intervention [Member]
Goodwill [Line Items]
Goodwill, Beginning Balance		18,123	17,828
Goodwill, Other Changes		(1,084)	295
Goodwill, Ending Balance		17,039	18,123
Robotics [Member]
Goodwill [Line Items]
Goodwill, Beginning Balance				45,107
Goodwill, Ending Balance		$ 45,107	$ 45,107	$ 45,107