Segment Information (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016 USD ($)	Jun. 30, 2015 USD ($)	Jun. 30, 2016 USD ($) segment	Jun. 30, 2015 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)
Segment Reporting [Abstract]
Number of reportable segments | segment			3
Segment Information
Net sales	$ 229,973	$ 216,665	$ 429,496	$ 393,156
Income (Loss) from Operations	40,924	35,009	67,565	51,286
Total Assets	999,539	995,857	999,539	995,857	$ 961,309
Cash and cash equivalent	246,337	248,612	246,337	248,612	258,825	$ 260,307
Intersegment elimination
Segment Information
Net sales	7,398	6,632	13,172	12,659
Administrative and all other
Segment Information
Income (Loss) from Operations	(1,943)	(2,197)	(4,291)	(3,951)
Total Assets	40	74,891	40	74,891	20,397
Cash and cash equivalent	164,700	165,000	164,700	165,000	164,100
North America
Segment Information
Net sales	197,284	183,381	371,738	333,705
Income (Loss) from Operations	40,116	35,249	70,568	55,715
Total Assets	799,429	716,222	799,429	716,222	748,241
North America | Intersegment elimination
Segment Information
Net sales	761	720	1,262	1,604
Europe
Segment Information
Net sales	30,820	30,627	54,518	53,414
Income (Loss) from Operations	1,899	3,328	281	1,696
Total Assets	173,273	177,227	173,273	177,227	168,305
Europe | Intersegment elimination
Segment Information
Net sales	89	92	181	391
Asia/Pacific
Segment Information
Net sales	1,869	2,657	3,240	6,037
Income (Loss) from Operations	852	(1,371)	1,007	(2,174)
Total Assets	26,797	27,517	26,797	27,517	$ 24,366
Asia/Pacific | Intersegment elimination
Segment Information
Net sales	$ 6,548	$ 5,820	$ 11,729	$ 10,664