CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Apr. 30, 2016	Jan. 31, 2016
Current assets:
Cash and cash equivalents	$ 428,245	$ 424,541
Investments, current portion	594,246	584,498
Accounts receivable, net	98,607	181,665
Prepaid expenses and other current assets	30,599	26,565
Total current assets	1,151,697	1,217,269
Investments, non-current	1,500	1,500
Property and equipment, net	144,655	134,995
Intangible assets, net	46,504	49,482
Goodwill	124,642	123,318
Other assets	14,866	10,275
Total assets	1,483,864	1,536,839
Current liabilities:
Accounts payable	4,885	4,868
Accrued payroll and compensation	62,171	95,898
Accrued expenses and other liabilities	43,192	49,879
Deferred revenue, current portion	354,888	347,121
Total current liabilities	465,136	497,766
Deferred revenue, non-current	95,889	102,382
Other liabilities, non-current	89,789	77,277
Total non-current liabilities	185,678	179,659
Total liabilities	$ 650,814	$ 677,425
Commitments and contingencies (Note 3)
Stockholders' equity:
Common stock: $0.001 par value; 1,000,000,000 shares authorized; 132,676,092 shares issued and outstanding at April 30, 2016, and 131,543,467 shares issued and outstanding at January 31, 2016	$ 133	$ 132
Accumulated other comprehensive loss	(1,233)	(3,770)
Additional paid-in capital	1,600,641	1,528,647
Accumulated deficit	(766,491)	(665,595)
Total stockholders' equity	833,050	859,414
Total liabilities and stockholders' equity	$ 1,483,864	$ 1,536,839