Segment and Geographic Information (Tables)

6 Months Ended

Jun. 30, 2011

Segment Reporting [Abstract]

Reconciliation of Revenue from Segments to Consolidated [Table Text Block]

	Three Months Ended June 30,								Six Months Ended June 30,
	2011				2010				2011				2010
	(in thousands)								(in thousands)
Net revenue:
United States	$	112,298	93.9	%	$	104,375	94.8	%	$	217,288	93.8	%	$	200,831	94.6	%
Europe	6,494		5.4	%	4,727		4.3	%	12,369		5.3	%	9,595		4.5	%
Rest of world	799		0.7	%	1,033		0.9	%	2,071		0.9	%	1,797		0.9	%
Total net revenue	$	119,591			$	110,135			$	231,728			$	212,223

Reconciliation of Assets from Segment to Consolidated [Table Text Block]

	June 30, 2011				December 31, 2010
	(in thousands)
Long-lived assets:
United States	$	114,675	98.9	%	$	117,095	98.8	%
Europe	1,230		1.1	%	1,213		1.0	%
Rest of world	100		0.1	%	220		0.2	%
Total long-lived assets	$	116,005			$	118,528