CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018		Sep. 30, 2017
CASH FLOWS FROM OPERATING ACTIVITIES:
Net loss	$ (73,561)		$ (65,650)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	70,955		59,197
Non-cash interest expense	26,099		23,792
Accretion of discount on investments	769		2,162
Stock-based compensation	112,261		106,678
Gain on sale of intangible assets	(20,000)		0
Gain on the sale of equity investments	0		(3,252)
Deferred income taxes	(32,735)		(36,150)
Unrealized foreign exchange gain	(11,997)		4,348
Non-cash changes in the fair value of contingent acquisition consideration	12,836		3,382
Other	(459)		4,657
Changes in operating assets and liabilities:
Accounts receivable, net	(95,884)		(21,598)
Inventory	(10,232)		(80,885)
Other current assets	4,276		(20,787)
Other assets	(3,148)		(1,030)
Accounts payable and accrued liabilities	(12,090)		(1,732)
Other long-term liabilities	3,744		3,497
Net cash used in operating activities	(29,166)		(23,371)
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchases of property, plant and equipment	(102,541)		(159,329)
Maturities and sales of investments	857,063		325,678
Purchases of available-for-sale securities	(439,198)		(609,794)
Proceeds from sale of intangible asset	20,000		0
Other	(10)		(1,560)
Net cash provided by (used in) investing activities	335,314		(445,005)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from exercises of awards under equity incentive plans	55,643		46,119
Taxes paid related to net share settlement of equity awards	(34,180)		(31,863)
Proceeds from convertible senior subordinated note offering, net	0		481,713
Payment of contingent acquisition consideration	(43,108)		(1,894)
Other	0		(26)
Net cash (used in) provided by financing activities	(21,645)		494,049
Effect of exchange rate changes on cash	(347)		(2,604)
NET INCREASE IN CASH AND CASH EQUIVALENTS	284,156		23,069
Cash and cash equivalents:
Beginning of period	598,028	[1]	408,330
End of period	882,184		431,399
SUPPLEMENTAL CASH FLOW DISCLOSURES:
Cash paid for income taxes	15,791		21,744
Cash paid for interest, net of interest capitalized into fixed assets	7,521		4,287
SUPPLEMENTAL CASH FLOW DISCLOSURES FOR NON CASH INVESTING AND FINANCING ACTIVITIES:
Decrease in accounts payable and accrued liabilities related to fixed assets	(7,678)		(25,047)
Conversion of convertible debt	$ 0		$ 22,477

[1] December 31, 2017 balances were derived from the audited Consolidated Financial Statements included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2017, filed with the SEC on February 26, 2018.