Intangible Assets (Changes in the Carrying Amount of Goodwill, by Segment) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2011	Dec. 31, 2010
Deferred Tax Liabilities, Goodwill and Intangible Assets [Abstract]
Balance at December 31	$ 1,352,281	$ 1,337,064
Goodwill acquired during the year	402,575
Earn-out and milestone payments	1,122	2,983
Purchase adjustments	615	579
Effect of foreign currency translation	(22,871)	11,655
Balance at December 31	$ 1,733,722	$ 1,352,281

Carrying amount as of the balance sheet date, which is the cumulative amount paid and (if applicable) the fair value of any noncontrolling interest in the acquiree, adjusted for any amortization recognized prior to the adoption of any changes in generally accepted accounting principles (as applicable) and for any impairment charges, in excess of the fair value of net assets acquired in one or more business combination transactions.

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+ Details

- Definition

The aggregate amount of goodwill acquired in the period and allocated to the reportable segment. The value is stated at fair value based on the purchase price allocation.

+ References+ Details

- Definition

The increase (decrease) in the recorded value of goodwill for foreign currency translation adjustments and purchase accounting adjustments needed to revise the carrying amount of goodwill to fair value.

+ References

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

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