Segment Information (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016 USD ($)	Sep. 30, 2015 USD ($)	Sep. 30, 2016 USD ($) segment	Sep. 30, 2015 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)
Segment Reporting [Abstract]
Number of reportable segments | segment			3
Segment Information
Net sales	$ 230,974	$ 216,139	$ 660,470	$ 609,295
Income (Loss) from Operations	45,777	35,249	113,342	86,535
Total Assets	984,303	960,046	984,303	960,046	$ 961,309
Cash and cash equivalent	218,720	242,795	218,720	242,795	258,825	$ 260,307
Intersegment elimination
Segment Information
Net sales	11,710	6,553	24,882	19,212
Administrative and all other
Segment Information
Income (Loss) from Operations	(728)	(801)	(5,019)	(4,753)
Total Assets	(15,755)	27,919	(15,755)	27,919	20,397
Cash and cash equivalent	128,600	153,800	128,600	153,800	164,100
North America
Segment Information
Net sales	197,459	184,515	569,198	518,221
Income (Loss) from Operations	42,356	33,432	112,924	89,148
Total Assets	795,339	730,333	795,339	730,333	748,241
North America | Intersegment elimination
Segment Information
Net sales	732	680	1,994	2,284
Europe
Segment Information
Net sales	31,485	29,728	86,003	83,143
Income (Loss) from Operations	3,899	3,563	4,180	5,259
Total Assets	178,428	176,208	178,428	176,208	168,305
Europe | Intersegment elimination
Segment Information
Net sales	157	250	338	641
Asia/Pacific
Segment Information
Net sales	2,030	1,896	5,269	7,931
Income (Loss) from Operations	250	(945)	1,257	(3,119)
Total Assets	26,291	25,586	26,291	25,586	$ 24,366
Asia/Pacific | Intersegment elimination
Segment Information
Net sales	$ 10,821	$ 5,623	$ 22,550	$ 16,287