Summary Of Significant Accounting Policies (Summary Of Activity Of Goodwill) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Goodwill [Roll Forward]
Beginning Balance	$ 581,379	$ 588,000
Acquisition activities	1,955,647	3,563
Disposition activities	(9,741)	(519)
Reduction in value of assets		(10,334)
Additional consideration paid for prior acquisitions	3,000	1,000
Foreign currency translation adjustments	1,780	(331)
Ending Balance	2,532,065	581,379
Drilling Products And Services [Member]
Goodwill [Roll Forward]
Beginning Balance	140,428	139,463
Additional consideration paid for prior acquisitions	3,000	1,000
Foreign currency translation adjustments	1,519	(35)
Ending Balance	144,947	140,428
Onshore Completion Services [Member]
Goodwill [Roll Forward]
Beginning Balance
Acquisition activities	1,193,486
Disposition activities
Reduction in value of assets
Allocation of goodwill to new segments	224,564
Additional consideration paid for prior acquisitions
Foreign currency translation adjustments
Ending Balance	1,418,050
Production Services [Member]
Goodwill [Roll Forward]
Beginning Balance
Acquisition activities	738,709
Disposition activities
Reduction in value of assets
Allocation of goodwill to new segments	138,994
Additional consideration paid for prior acquisitions
Foreign currency translation adjustments	349
Ending Balance	878,052
Subsea And Technical Solutions [Member]
Goodwill [Roll Forward]
Beginning Balance
Acquisition activities
Disposition activities
Reduction in value of assets
Allocation of goodwill to new segments	91,016
Additional consideration paid for prior acquisitions
Foreign currency translation adjustments
Ending Balance	91,016
Subsea and Well Enhancement [Member]
Goodwill [Roll Forward]
Beginning Balance	440,951	437,684
Acquisition activities	23,452	3,563
Disposition activities	(9,741)
Allocation of goodwill to new segments	(454,574)
Foreign currency translation adjustments	(88)	(296)
Ending Balance		440,951
Marine [Member]
Goodwill [Roll Forward]
Beginning Balance		10,853
Acquisition activities
Disposition activities		(519)
Reduction in value of assets		(10,334)
Allocation of goodwill to new segments
Additional consideration paid for prior acquisitions
Foreign currency translation adjustments
Ending Balance