Amounts Reclassified out of Accumulated Other Comprehensive Income (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net product revenues	$ 1,704,048	$ 1,491,212	$ 1,313,646
LOSS FROM OPERATIONS	(100,457)	(123,524)	(14,700)
Other income	6,945	2,205	7,970
Provision for (benefit from) income taxes	(70,963)	(65,494)	81,167
NET LOSS	(23,848)	(77,211)	(117,042)
Product
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net product revenues	1,661,043	1,470,356	1,270,445
Amount Reclassified from AOCI (Gain) Loss
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Provision for (benefit from) income taxes	0	0	(1,191)
Total gain on available-for-sale debt securities	0	0	2,061
NET LOSS	15,853	(2,047)	(3,052)
Amount Reclassified from AOCI (Gain) Loss | Gains (losses) on Cash Flow Hedges
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
LOSS FROM OPERATIONS	15,853	(2,047)	(5,113)
Amount Reclassified from AOCI (Gain) Loss | Gains (losses) on Cash Flow Hedges | Forward Foreign Currency Exchange Contracts
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Operating expenses	(1,819)	3,958	264
Amount Reclassified from AOCI (Gain) Loss | Gains (losses) on Cash Flow Hedges | Product | Forward Foreign Currency Exchange Contracts
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net product revenues	17,672	(6,005)	(5,377)
Amount Reclassified from AOCI (Gain) Loss | Gain (Loss) on Sale of Available-for-Sale Debt Securities
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other income	$ 0	$ 0	$ 3,252