Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
CURRENT ASSETS:
Cash and cash equivalents	$ 546,237	$ 460,887
Marketable securities	2,573,145	2,982,422
Accounts receivable (net of allowance for doubtful accounts of $17,970 and $11,944 at December 31, 2015 and 2014, respectively)	603,060	449,048
Deferred commissions	87,706	66,561
Prepaid expenses	62,992	52,978
Other current assets	61,949	110,204
Total current assets	3,935,089	4,122,100
Property and equipment, net	1,047,005	740,909
Goodwill	1,507,093	356,718
Intangible assets, net	373,087	131,275
Other assets	148,925	76,255
TOTAL ASSETS	7,011,199	5,427,257
CURRENT LIABILITIES:
Accounts payable	162,176	100,297
Accrued liabilities	316,792	260,189
Deferred revenue	709,116	522,299
Total current liabilities	1,188,084	882,785
CONVERTIBLE SENIOR NOTES, NET	1,126,534	1,081,553
OTHER LONG-TERM LIABILITIES	201,128	132,100
Total liabilities	$ 2,515,746	$ 2,096,438
COMMITMENTS AND CONTINGENCIES (Note 12)
REDEEMABLE NONCONTROLLING INTEREST	$ 26,810	$ 5,427
STOCKHOLDERS’ EQUITY (Note 13):
Additional paid-in capital	4,588,578	3,285,705
Accumulated other comprehensive income (loss)	9,124	(198)
Accumulated earnings (deficit)	(129,072)	39,872
Total stockholders’ equity	4,468,643	3,325,392
TOTAL LIABILITIES, REDEEMABLE NONCONTROLLING INTEREST, AND STOCKHOLDERS’ EQUITY	7,011,199	5,427,257
Class A Common Stock [Member]
STOCKHOLDERS’ EQUITY (Note 13):
Common stock	12	11
Class B Common Stock [Member]
STOCKHOLDERS’ EQUITY (Note 13):
Common stock	$ 1	$ 2