Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Current assets:
Cash and cash equivalents	$ 232,784	$ 274,030
Short-term investments	190,016	197,163
Accounts receivable, net	205,568	202,329
Inventories, net	187,411	173,052
Prepaid expenses and other current assets	80,885	70,075
Deferred income taxes, net	30,016	31,171
Total current assets	926,680	947,820
Property and equipment, net	264,146	264,086
Goodwill	167,491	144,325
Intangible assets, net	76,488	78,282
Other long-term assets	21,397	20,978
Total assets	1,456,202	1,455,491
Current liabilities:
Accounts payable	57,289	58,603
Accrued compensation	27,679	33,774
Deferred revenue - current	109,514	105,964
Accrued expenses and other liabilities	12,985	14,714
Other taxes payable	36,333	34,602
Total current liabilities	243,800	247,657
Deferred income taxes	45,765	47,406
Liability for uncertain tax positions	10,280	10,127
Deferred revenue- long term	26,705	26,452
Other long-term liabilities	10,026	6,353
Total liabilities	$ 336,576	$ 337,995
Commitments and contingencies
Stockholders' equity:
Preferred stock: par value $0.01; 5,000,000 shares authorized; none issued and outstanding
Common stock: par value $0.01; 360,000,000 shares authorized; 128,860,566 shares and 127,849,271 shares issued and outstanding, respectively	$ 1,289	$ 1,278
Additional paid-in capital	693,107	662,889
Retained earnings	449,023	464,993
Accumulated other comprehensive loss	(23,793)	(11,664)
Total stockholders' equity	1,119,626	1,117,496
Total liabilities and stockholders' equity	$ 1,456,202	$ 1,455,491