Goodwill and Intangible Assets, Net (Details 2) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 31, 2012	Mar. 31, 2011	Dec. 31, 2011
Changes in gross carrying amount of finite-lived intangible assets
Gross Carrying Amount	$ 63,505	$ 39,100	$ 46,026
Accumulated Amortization	(20,021)	(16,204)	(18,170)
Net Carrying Amount	43,484	22,896	27,856
Amortization expense of intangible assets	1,851	1,100
Estimated future amortization of intangible assets
Final nine months of 2012	5,227
2012	6,550
2013	6,334
2014	5,566
2015	5,410
2016	3,912
Thereafter	10,485
Total	43,484
North America
Changes in gross carrying amount of finite-lived intangible assets
Gross Carrying Amount	34,552	24,022	32,912
Accumulated Amortization	(14,304)	(11,443)	(13,288)
Net Carrying Amount	20,248	12,579	19,624
Europe
Changes in gross carrying amount of finite-lived intangible assets
Gross Carrying Amount	28,953	15,078	13,114
Accumulated Amortization	(5,717)	(4,761)	(4,882)
Net Carrying Amount	$ 23,236	$ 10,317	$ 8,232

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The accumulated amount of amortization of a major finite-lived intangible asset class. A major class is composed of intangible assets that can be grouped together because they are similar, either by their nature or by their use in the operations of a company.

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Aggregate amount of intangible asset amortization recognized as expense during the period.

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The aggregate estimated amortization expense for succeeding fiscal years for intangible assets subject to amortization.

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Sum of the gross carrying amounts before accumulated amortization as of the balance sheet date of all intangible assets having statutory or estimated useful lives. The aggregate gross carrying amount (including any previously recognized impairment charges) of a major finite-lived intangible asset class. A major class is composed of intangible assets that can be grouped together because they are similar, either by their nature or by their use in the operations of a company.

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The amount of amortization expense expected to be recognized for the remainder of the finite-lived intangible asset useful life after the fifth succeeding fiscal year.

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