Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
CURRENT ASSETS:
Cash and cash equivalents	$ 524,687	$ 859,192
Marketable securities	1,137,112	676,363
Accounts receivable, net of rebates and allowances of $11,251 and $7,535, respectively	322,053	247,346
Inventories	216,313	306,198
Prepaid expenses and other current assets	235,881	177,330
Total current assets	2,436,046	2,266,429
Property and equipment, net	75,397	74,279
Acquisition-related intangible assets, net	62,110	0
Goodwill	55,168	0
Investments	35,036	36,136
Deferred tax assets	114,282	65,125
Other assets	20,199	18,891
TOTAL ASSETS	2,798,238	2,460,860
CURRENT LIABILITIES:
Accounts payable	85,097	52,200
Accrued liabilities	103,108	133,827
Deferred revenue	318,850	327,706
Other current liabilities	32,727	16,172
Total current liabilities	539,782	529,905
Income taxes payable	42,470	34,067
Lease financing obligations, non-current	36,040	37,673
Deferred revenue, non-current	211,005	187,556
Other long-term liabilities	23,065	9,745
TOTAL LIABILITIES	852,362	798,946
Commitments and contingencies (Note 6)
STOCKHOLDERS’ EQUITY:
Preferred stock, $0.0001 par value—100,000 shares authorized and no shares issued and outstanding as of September 30, 2018 and December 31, 2017	0	0
Common stock, $0.0001 par value—1,000,000 shares authorized as of September 30, 2018 and December 31, 2017; 75,393 and 73,706 shares issued and outstanding as of September 30, 2018 and December 31, 2017	8	7
Additional paid-in capital	929,829	804,731
Retained earnings	1,020,481	859,114
Accumulated other comprehensive loss	(4,442)	(1,938)
TOTAL STOCKHOLDERS’ EQUITY	1,945,876	1,661,914
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	$ 2,798,238	$ 2,460,860