Consolidated Statements Of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Net revenue	$ 1,369,633	$ 1,271,921	$ 1,181,018
Cost of revenue	976,018	888,368	811,572
Gross profit	393,615	383,553	369,446
Operating expenses:
Research and development	85,168	61,066	48,699
Sales and marketing	153,804	149,766	154,562
General and administrative	48,915	45,027	39,423
Restructuring and other charges	5,335	1,190	2,094
Litigation reserves, net	5,354	390	(201)
Impairment charges	2,000	0	0
Total operating expenses	300,576	257,439	244,577
Income from operations	93,039	126,114	124,869
Interest income	400	498	477
Other (expense) income, net	(457)	2,670	(1,136)
Income before income taxes	92,982	129,282	124,210
Provision for income taxes	37,765	42,743	32,842
Net Income	$ 55,217	$ 86,539	$ 91,368
Net income per share:
Basic net income per share (in dollars per share)	$ 1.44	$ 2.27	$ 2.46
Diluted net income per share (in dollars per share)	$ 1.42	$ 2.23	$ 2.41
Weighted average shares outstanding used to compute net income per share:
Basic (in shares)	38,379	38,057	37,121
Diluted (in shares)	38,948	38,747	37,932