Segment Reporting - Net Sales by Geographic Region (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Revenues from External Customers and Long-Lived Assets [Line Items]
Net Sales	$ 117,115	$ 110,996	$ 228,600	$ 203,172
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Net Sales	107,694	101,095	211,336	184,751
Canada
Revenues from External Customers and Long-Lived Assets [Line Items]
Net Sales	$ 9,421	$ 9,901	$ 17,264	$ 18,421