Acquisitions - Purchase Price for Acquisition (Details) (LeTourneau Technologies, Inc., USD $) In Thousands, unless otherwise specified	0 Months Ended
Jun. 22, 2011
LeTourneau Technologies, Inc.
Business Acquisition [Line Items]
Cash consideration	$ 1,100,000
Working capital purchase price adjustments	(46,323)
Total purchase price	$ 1,053,677

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Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

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Amount of tangible or intangible assets, including a business or subsidiary of the acquirer transferred by the entity to the former owners of the acquiree. Excludes cash.

+ References

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The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.

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