Segment Information (Net Sales by Geographic Area) (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Segment Reporting Information [Line Items]
Net sales	$ 397,969	$ 378,924	$ 383,588
Long-Lived Assets	80,325	78,008	81,769
United States [Member]
Segment Reporting Information [Line Items]
Net sales	269,989	251,695	239,101
Long-Lived Assets	48,787	45,979	48,803
France [Member]
Segment Reporting Information [Line Items]
Net sales	47,831	52,517	58,974
Long-Lived Assets	16,436	17,463	17,621
Germany [Member]
Segment Reporting Information [Line Items]
Net sales	77,229	71,896	81,424
Long-Lived Assets	13,287	13,542	14,065
Others [Member]
Segment Reporting Information [Line Items]
Net sales	2,920	2,816	4,089
Long-Lived Assets	$ 1,815	$ 1,024	$ 1,280