Schedule II - Valuation and Qualifying Accounts (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Allowance for Doubtful Accounts [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance, beginning of year	$ 2,239	$ 2,703	$ 2,725
Provision	32	7	1,061
Write-offs, recoveries and discounts allowed	(497)	(275)	(946)
Other	(55)	(196)	(137)
Balance, end of year	1,719	2,239	2,703
Allowance for Sales Discounts and Deductions [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance, beginning of year	1,593	1,809	1,810
Provision	4,283	3,856	4,356
Write-offs, recoveries and discounts allowed	(4,368)	(3,649)	(4,719)
Other	(46)	(423)	362
Balance, end of year	$ 1,462	$ 1,593	$ 1,809