Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 37,628	$ 72,747
Restricted cash	0	3,227
Marketable securities	25,880	26,851
Trade receivables, net of allowance for doubtful accounts of $143 as of December 31, 2013 and December 31, 2012	45,510	47,196
Promissory note receivable	1,000	25,895
Prepaid expenses, deferred tax assets and other current assets	11,696	10,492
Total current assets	121,714	186,408
Assets, Noncurrent
Marketable securities, net of current portion	2,879	12,548
Restricted cash, net of current portion	516	273
Property and equipment, net	18,449	10,888
Goodwill	158,507	123,670
Purchased intangible assets, net	68,671	53,223
Promissory notes receivable, net of current portion	6,393	8,901
Other assets	15,437	9,931
Total assets	392,566	405,842
Current liabilities:
Accounts payable	2,481	3,279
Accrued liabilities	16,117	19,760
Accrued compensation and benefits	12,078	14,514
Current portion of accrued restructuring charges	1,463	324
Deferred gain on sale of intellectual property	0	25,895
Current portion of deferred revenue	82,275	86,340
Total current liabilities	114,414	150,112
Liabilities, Noncurrent
Deferred revenue, net of current portion	3,342	2,811
Accrued income tax	19,943	8,710
Accrued restructuring charges, net of current portion	359	367
Lease-related liabilities, net of current portion	6,049	1,021
Stockholders’ equity:
Preferred stock, $.0001 par value; 2,000 shares authorized; no shares issued and outstanding	0	0
Common stock, $.0001 par value; 100,000 shares authorized; 55,713 and 55,879 shares issued and outstanding at December 31 2013 and December 31, 2012, respectively	6	6
Additional paid-in capital	493,509	480,001
Lease guarantee	(147)	(210)
Accumulated deficit	(247,597)	(238,240)
Accumulated other comprehensive income	2,688	1,264
Total stockholders’ equity	248,459	242,821
Total liabilities and stockholders’ equity	$ 392,566	$ 405,842