CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Operating Activities
Net (loss) income	$ (45,070)	$ 37,139
Adjustments to reconcile net (loss) income to net cash provided by (used in) operating activities:
Non-cash PDL royalty revenue		(95,852)
Non-cash interest expense on PDL liability		14,646
Depreciation and amortization	57,930	9,063
Accretion of debt discount	11,456	825
Amortization of investments	391	262
Provision for inventory obsolescence	1,159
Loss on disposal of property and equipment	45	17
Stock-based compensation	9,697	6,497
Change in fair value of contingent consideration and unfavorable contract	(2,733)	1,784
Deferred income taxes (benefit) provision	(13,238)	31,173
Excess tax benefit from stock-based compensation	(4,011)	(2,152)
Changes in assets and liabilities:
Accounts receivable	(41,352)	(1,133)
Receivables from collaborative partners	181
Inventories	7,533	2,853
Prepaid and other assets	(2,208)	(972)
Income taxes receivable	(15,598)	(6,246)
Accounts payable and other accrued liabilities	104,575	5,432
Interest payable	13,836
Accrued compensation	3,246	(416)
Income taxes payable		(59,722)
Deferred revenue		(2,281)
Net cash provided by (used in) operating activities	85,839	(59,083)
Investing Activities
Purchases of property and equipment	(1,162)	(853)
Business acquisition (Note 13)	(1,050,000)
Purchases of marketable securities	(62,153)	(6,703)
Maturities of marketable securities	72,505	24,845
Net cash (used in) provided by investing activities	(1,040,810)	17,289
Financing Activities
Proceeds from the issuance of Senior Notes	562,063	345,000
Senior Notes issuance costs	(511)	(10,561)
Proceeds from issuance of common stock	8,240	7,227
Excess tax benefit from stock-based compensation	4,011	2,152
Net cash provided by financing activities	573,803	343,818
Net decrease in cash and cash equivalents	(381,168)	302,024
Cash and cash equivalents at beginning of period	488,668	244,674
Cash and cash equivalents at end of period	107,500	546,698
Cash paid during the period for:
Taxes, net of refunds	77	58,800
Interest	$ 23,715
Convertible debt issuance costs included in account payable and other accrued liabilities		$ 214