Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Current assets:
Cash and cash equivalents	$ 198,952	$ 298,133
Short-term investments, available for sale	312,226	318,599
Accounts receivable, net of allowances of $18.6 and $17.5 million, respectively	188,193	155,421
Inventories	111,751	72,132
Income taxes receivable and deferred tax assets	17,905	18,618
Other current assets	32,537	15,804
Total current assets	861,564	878,707
Property and equipment, net	96,002	86,197
Goodwill	328,617	245,443
Intangible assets, net	133,165	62,571
Deferred tax assets	28,391	22,062
Other assets	13,012	9,580
Total assets	1,460,751	1,304,560
Current liabilities:
Accounts payable	111,552	86,940
Accrued and other liabilities	65,756	63,183
Deferred revenue	61,675	41,927
Income taxes payable and deferred tax liabilities	5,957	1,759
Total current liabilities	244,940	193,809
Convertible senior notes, net	293,516	284,818
Imputed financing obligation related to build-to-suit lease	13,134	12,472
Noncurrent contingent and other liabilities	48,645	5,440
Noncurrent deferred tax liabilities	26,324	3,820
Noncurrent income taxes payable	10,809	15,512
Total liabilities	$ 637,368	$ 515,871
Commitments and contingencies (Note 8)
Stockholders' equity:
Preferred stock, $0.01 par value; 5,000 shares authorized; none issued and outstanding
Common stock, $0.01 par value; 150,000 shares authorized; 51,540 and 49,671 shares issued, respectively	$ 515	$ 497
Additional paid-in capital	638,038	568,896
Treasury stock, at cost; 3,931 and 2,736 shares, respectively	(164,884)	(113,992)
Accumulated other comprehensive loss	(14,142)	(7,357)
Retained earnings	363,856	340,645
Total stockholders' equity	823,383	788,689
Total liabilities and stockholders' equity	$ 1,460,751	$ 1,304,560