Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
CURRENT ASSETS:
Cash and cash equivalents	$ 342,958	$ 240,031
Marketable securities	208,805	209,426
Accounts receivable, net of allowances of $2,090 and $3,094, respectively	122,342	96,982
Inventories	100,304	78,006
Deferred tax assets	12,268	12,252
Prepaid expenses and other current assets	63,535	42,782
Total current assets	850,212	679,479
Property and equipment, net	73,178	71,558
Investments	36,636	36,636
Deferred tax assets	13,760	11,510
Other assets	17,053	11,840
TOTAL ASSETS	990,839	811,023
CURRENT LIABILITIES:
Accounts payable	43,831	32,428
Accrued liabilities	43,347	40,369
Deferred revenue	107,245	60,327
Other current liabilities	8,075	11,249
Total current liabilities	202,498	144,373
Income taxes payable	17,850	17,323
Lease financing obligations, non-current	41,912	42,547
Deferred revenue, non-current	57,198	46,141
Other long-term liabilities	5,839	4,981
TOTAL LIABILITIES	$ 325,297	$ 255,365
Commitments and contingencies (Note 5)
STOCKHOLDERS’ EQUITY:
Preferred stock, $0.0001 par value—100,000 shares authorized, no shares issued and outstanding as of June 30, 2015 and December 31, 2014	$ 0	$ 0
Common stock, $0.0001 par value—1,000,000 shares authorized as of June 30, 2015 and December 31, 2014; 67,302 and 65,528 shares issued and outstanding as of June 30, 2015 and December 31, 2014, respectively	7	7
Additional paid-in capital	487,376	426,171
Retained earnings	178,302	129,814
Accumulated other comprehensive loss	(143)	(334)
TOTAL STOCKHOLDERS’ EQUITY	665,542	555,658
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	$ 990,839	$ 811,023