Information by Geographic Area (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived Assets	$ 20,626		$ 20,626		$ 22,841
Net Sales	262,413	$ 302,791	476,483	$ 539,577
China
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived Assets	14,148		14,148		15,710
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived Assets	6,067		6,067		6,587
Net Sales	199,064	229,850	367,694	416,034
Hong Kong
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived Assets	411		411		$ 544
Net Sales	397	1,184	784	1,861
Europe
Revenues from External Customers and Long-Lived Assets [Line Items]
Net Sales	33,640	43,446	56,537	67,611
Canada
Revenues from External Customers and Long-Lived Assets [Line Items]
Net Sales	11,062	12,709	18,086	22,412
Other
Revenues from External Customers and Long-Lived Assets [Line Items]
Net Sales	$ 18,250	$ 15,602	$ 33,382	$ 31,659