Summary of Significant Accounting Policies (Details 2) (USD $) In Thousands, unless otherwise specified	9 Months Ended				9 Months Ended
	Sep. 30, 2013	Sep. 30, 2013 Drilling and Rig Services	Sep. 30, 2013 U.S.	Dec. 31, 2012 U.S.	Sep. 30, 2013 Rig Services	Sep. 30, 2013 Completion and Production Services	Dec. 31, 2012 Completion and Production Services	Sep. 30, 2013 Completion	Dec. 31, 2012 Completion	Sep. 30, 2013 Production	Dec. 31, 2012 Production
Change in the carrying amount of goodwill for various contract drilling segments and other operating segments
Beginning Balance	$ 472,326	$ 82,262	$ 50,149	$ 50,149	$ 32,113	$ 390,064	$ 390,064	$ 334,992	$ 334,992	$ 55,072	$ 55,072
Acquisitions and purchase price adjustment	15,828	15,828			15,828
Disposals and Impairments	(8,000)	(8,000)			(8,000)
Cumulative Translation Adjustment	(597)	(597)			(597)
Ending Balance	$ 479,557	$ 89,493	$ 50,149	$ 50,149	$ 39,344	$ 390,064	$ 390,064	$ 334,992	$ 334,992	$ 55,072	$ 55,072