Segment Information (Net Sales by Geographic Area) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Segment Reporting Information [Line Items]
Net sales	$ 524,505	$ 535,829	$ 397,969
Long-Lived Assets	116,717	118,680	80,325
United States
Segment Reporting Information [Line Items]
Net sales	344,950	345,864	269,989
Long-Lived Assets	76,502	72,832	48,787
France
Segment Reporting Information [Line Items]
Net sales	47,495	52,534	47,831
Long-Lived Assets	12,899	13,861	16,436
Germany
Segment Reporting Information [Line Items]
Net sales	68,861	77,896	77,229
Long-Lived Assets	10,149	12,366	13,287
United Kingdom
Segment Reporting Information [Line Items]
Net sales	26,598	26,387	0
Long-Lived Assets	6,399	7,601	0
China
Segment Reporting Information [Line Items]
Net sales	33,885	29,401	0
Long-Lived Assets	9,953	11,225	0
Other
Segment Reporting Information [Line Items]
Net sales	2,716	3,747	2,920
Long-Lived Assets	$ 815	$ 795	$ 1,815