Schedule II - Valuation and Qualifying Accounts and Reserves (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Valuation Allowance of Deferred Tax Assets [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at beginning of the period	$ 84,960	$ 72,061	$ 53,663
Charged to other accounts	24,070	12,899	18,398
Balance at end of the period	109,030	84,960	72,061
Allowance For Rebates [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at beginning of the period	2,581	231
Charged to income	(613)
Charged to other accounts	6,615	2,725	231
Deductions	(5,577)	(375)
Balance at end of the period	3,006	2,581	231
Allowance For Price Adjustments And Chargebacks [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at beginning of the period	2,272	1,108
Charged to income	(555)
Charged to other accounts	6,598	6,894	1,542
Deductions	(6,876)	(5,730)	(434)
Balance at end of the period	$ 1,439	$ 2,272	$ 1,108