CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2018		Jun. 30, 2017
CASH FLOWS FROM OPERATING ACTIVITIES:
Net loss	$ (60,941)		$ (53,123)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	44,610		38,497
Non-cash interest expense	17,300		15,601
Accretion of discount on investments	(41)		1,327
Stock-based compensation	75,214		70,775
Gain on sale of intangible assets	(20,000)		0
Gain on the sale of equity investments	0		(3,252)
Deferred income taxes	(29,681)		(22,770)
Unrealized foreign exchange gain	(5,693)		(4,870)
Non-cash changes in the fair value of contingent acquisition consideration	1,828		7,195
Other	1,772		3,806
Changes in operating assets and liabilities:
Accounts receivable, net	(77,416)		(16,834)
Inventory	15,493		(60,369)
Other current assets	(2,037)		(3,710)
Other assets	(6,448)		(1,109)
Accounts payable and accrued liabilities	(32,989)		(36,286)
Other long-term liabilities	2,663		3,459
Net cash used in operating activities	(76,366)		(61,663)
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchases of property, plant and equipment	(52,682)		(116,847)
Maturities and sales of investments	311,969		234,617
Purchases of available-for-sale securities	(345,458)		(130,986)
Proceeds from sale of intangible asset	20,000		0
Other	(841)		(1,560)
Net cash used in investing activities	(67,012)		(14,776)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from exercises of awards under equity incentive plans	44,926		40,659
Taxes paid related to net share settlement of equity awards	(28,614)		(26,624)
Payment of contingent acquisition consideration	(43,108)		(1,894)
Other	0		(28)
Net cash (used in) provided by financing activities	(26,796)		12,113
Effect of exchange rate changes on cash	(443)		10,860
NET DECREASE IN CASH AND CASH EQUIVALENTS	(170,617)		(53,466)
Cash and cash equivalents:
Beginning of period	598,028	[1]	408,330
End of period	427,411		354,864
SUPPLEMENTAL CASH FLOW DISCLOSURES:
Cash paid for income taxes	14,858		16,341
Cash paid for interest, net of interest capitalized into fixed assets	5,831		4,519
SUPPLEMENTAL CASH FLOW DISCLOSURES FOR NON CASH INVESTING AND FINANCING ACTIVITIES:
Decrease in accounts payable and accrued liabilities related to fixed assets	(7,734)		(29,300)
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.