Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Current assets
Cash and cash equivalents	$ 500,766	$ 435,093
Short-term investments	171,265	184,242
Trade receivables, net	162,896	187,888
Inventories	98,281	89,392
Prepaid expenses and other current assets	50,706	52,852
Total current assets	983,914	949,467
Property and equipment, net	97,301	101,853
Long-term investments	41,168	46,484
Goodwill	558,913	558,775
Purchased intangibles, net	11,765	14,065
Deferred taxes	85,221	89,865
Other assets	21,407	21,738
Total assets	1,799,689	1,782,247
Current liabilities
Accounts payable	87,093	73,472
Accrued payroll and related liabilities	29,390	38,781
Taxes payable	1,469	4,342
Deferred revenue	173,342	170,559
Current portion of long-term debt	5,717	5,717
Other accrued liabilities	79,835	85,095
Total current liabilities	376,846	377,966
Long-term deferred revenue	89,931	86,191
Taxes payable	10,073	9,983
Deferred taxes	149	135
Long-term debt	227,369	228,799
Other non-current liabilities	25,676	25,964
Total liabilities	$ 730,044	$ 729,038
Commitments and contingencies (Note 8)
Stockholders' equity
Common stock, $0.0005 par value; authorized: 350,000,000 shares; issued and outstanding:135,613,941 shares at March 31, 2016 and 132,665,165 shares at December 31, 2015	$ 67	$ 66
Additional paid-in capital	1,181,071	1,167,701
Accumulated deficit	(110,019)	(113,355)
Accumulated other comprehensive loss	(1,474)	(1,203)
Total stockholders' equity	1,069,645	1,053,209
Total liabilities and stockholders' equity	$ 1,799,689	$ 1,782,247