Goodwill and Intangible Assets, Net (Details 3) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Changes in the carrying amount of goodwill
Balance at the beginning of the period			$ 129,218
Foreign exchange			13
Balance at the end of the period	129,231	122,678	129,231	122,678
Changes in the carrying amount of intangible assets
Balance at the beginning of the period			41,773
Amortization	(1,500)	(2,000)	(3,697)	(4,000)
Foreign exchange			(20)
Balance at the end of the period	$ 38,056	$ 48,725	$ 38,056	$ 48,725