Goodwill and Other Intangibles (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 31, 2012	Mar. 31, 2012 U.S. Operations	Mar. 31, 2012 U.S. Operations Minimum	Mar. 31, 2012 U.S. Operations Maximum	Mar. 31, 2012 European Operations	Mar. 31, 2012 Asia Pacific Operations	Dec. 31, 2011 Asia Pacific Operations
Goodwill
Balance at the beginning of the period	$ 274,292	$ 245,105			$ 28,486	$ 701	$ 701
Currency translation adjustment	(9)	5			(14)
Balance at the end of the period	$ 274,283	$ 245,110			$ 28,472	$ 701	$ 701
Percentage of fair value of goodwill in excess of carrying value			14.00%	40.00%

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