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Goodwill and Intangible Assets, Net (Details 1) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Summary of intangible assets acquired in business combinations
Intangible assets with definite lives	$ 21,382	$ 89,323
Less: accumulated amortization	(13,492)	(75,593)
Intangible assets with definite lives, net	7,890	13,730
Intangible assets with indefinite lives	30,300	30,300
Intangible assets, net	$ 38,190	$ 44,030

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Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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