Net Revenues by Geographic Area (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014		Mar. 31, 2013
Segment Reporting Information [Line Items]
Net revenues	$ 180,646	[1]	$ 153,580	[1]
United States
Segment Reporting Information [Line Items]
Net revenues	128,640	[1]	119,840	[1]
the Netherlands
Segment Reporting Information [Line Items]
Net revenues	38,843	[1]	26,947	[1]
Other international
Segment Reporting Information [Line Items]
Net revenues	$ 13,163	[1]	$ 6,793	[1]

[1] Net revenues are attributed to countries based on location of where revenue is recognized.