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Revenue Recognition and Reserve for Sales Returns and Allowances - Additional Information (Detail) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Dec. 31, 2016
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]
Reserve for sales returns and allowances	$ 12,975	$ 16,424
Minimum
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]
Discount on invoiced amount of products	1.00%
Maximum
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]
Discount on invoiced amount of products	10.00%

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- Definition

Cash Discount Discount Rate

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- Definition

Sales Reserves and Allowances

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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