Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
CURRENT ASSETS:
Cash and cash equivalents	$ 859,192	$ 567,923
Marketable securities	676,363	299,910
Accounts receivable, net of rebates and allowances of $7,535 and $1,521, respectively	247,346	253,119
Inventories	306,198	236,490
Prepaid expenses and other current assets	177,330	168,684
Total current assets	2,266,429	1,526,126
Property and equipment, net	74,279	76,961
Investments	36,136	36,136
Deferred tax assets	65,125	70,960
Other assets	18,891	18,824
TOTAL ASSETS	2,460,860	1,729,007
CURRENT LIABILITIES:
Accounts payable	52,200	79,457
Accrued liabilities	133,827	90,951
Deferred revenue	327,706	273,350
Other current liabilities	16,172	15,795
Total current liabilities	529,905	459,553
Income taxes payable	34,067	14,498
Lease financing obligations, non-current	37,673	39,593
Deferred revenue, non-current	187,556	99,585
Other long-term liabilities	9,745	7,958
TOTAL LIABILITIES	798,946	621,187
Commitments and contingencies
STOCKHOLDERS’ EQUITY:
Preferred stock, $0.0001 par value—100,000 shares authorized and no shares issued and outstanding as of December 31, 2017 and 2016	0	0
Common stock, $0.0001 par value—1,000,000 shares authorized as of December 31, 2017 and 2016; 73,706 and 70,811 shares issued and outstanding as of December 31, 2017 and 2016	7	7
Additional paid-in capital	804,731	674,183
Retained earnings	859,114	435,105
Accumulated other comprehensive loss	(1,938)	(1,475)
TOTAL STOCKHOLDERS’ EQUITY	1,661,914	1,107,820
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	$ 2,460,860	$ 1,729,007