CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 252,854	$ 274,305
Investments	305,541	304,781
Accounts receivable, net	85,233	92,375
Inventories	36,927	37,258
Prepaid and other current assets	8,316	9,839
Total current assets	688,871	718,558
Property, plant and equipment, net	22,708	24,460
Goodwill	639,484	639,484
Intangible assets, net	1,067,329	1,092,178
Restricted cash	2,493	2,593
Other long-term assets	1,025	1,153
Total assets	2,421,910	2,478,426
Current liabilities:
Accounts payable	7,591	3,684
Accrued expenses	147,479	156,008
Current portion of long-term debt	20,455	21,166
Current portion of acquisition-related contingent consideration	97,515	97,068
Deferred revenues	34,899	34,951
Total current liabilities	307,939	312,877
Long-term liabilities:
Long-term debt, net	783,333	785,992
Convertible 2.5% notes, net	181,566	179,363
Acquisition-related contingent consideration	51,440	50,927
Deferred tax liabilities	154,225	197,066
Deferred revenues	16,970	14,850
Other long-term liabilities	2,349	2,962
Total liabilities	1,497,822	1,544,037
Commitments and contingencies
Stockholders’ equity:
Preferred stock, par value $0.01 per share, 2,000,000 shares authorized; none issued	0	0
Common stock, par value $0.01 per share, 117,500,000 shares authorized; 34,445,394 and 34,336,147 shares issued and outstanding at March 31, 2017 and December 31, 2016, respectively	344	343
Additional paid-in capital	1,242,640	1,238,031
Accumulated other comprehensive loss	(3,746)	(3,838)
Accumulated deficit	(315,150)	(300,147)
Total stockholders’ equity	924,088	934,389
Total liabilities and stockholders’ equity	$ 2,421,910	$ 2,478,426