Information about Geographic Areas (Tables)

6 Months Ended

Jun. 30, 2012

Segment Reporting [Abstract]

Scedule of Revenue by Geographic Area

Long-lived assets are allocated based on the location of the corporate entity to which they relate.

	Three Months Ended June 30,				Six Months Ended June 30,
	2012		2011		2012		2011
Revenues
United States	$	61,957	$	46,890	$	121,125	$	92,116
Germany	6,635		5,761		14,237		11,173
Rest of the world	8,346		4,102		14,914		6,138
Total revenues	$	76,938	$	56,753	$	150,276	$	109,427

Schedule of Long-lived Assets by Geographic Area

	As of June 30,		As of December 31,
	2012		2011
Long-lived assets
United States	$	147,390	$	149,254
Germany	18,956		20,205
Rest of the world	8,729		9,376
Total long-lived assets	$	175,075	$	178,835