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Segment Information (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017 USD ($)	Sep. 30, 2016 USD ($)	Sep. 30, 2017 USD ($) segment	Sep. 30, 2016 USD ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)
Segment Reporting [Abstract]
Number of reportable segments | segment			3
Segment Information
Net sales	$ 262,476	$ 230,974	$ 745,345	$ 660,470
Income (Loss) from Operations	46,696	45,777	114,463	113,342
Total Assets	1,068,383	984,303	1,068,383	984,303	$ 979,974
Cash and cash equivalent	204,171	218,720	204,171	218,720	226,537	$ 258,825
Intersegment elimination
Segment Information
Net sales	4,888	11,710	17,484	24,882
Administrative and all other
Segment Information
Income (Loss) from Operations	(197)	(728)	(3,387)	(5,019)
Total Assets	(114,886)	(15,755)	(114,886)	(15,755)	(64,091)
Cash and cash equivalent	116,000	128,600	116,000	128,600	137,400
North America
Segment Information
Net sales	213,254	197,459	612,765	569,198
Income (Loss) from Operations	41,972	42,356	110,748	112,924
Total Assets	946,180	795,339	946,180	795,339	853,826
North America | Intersegment elimination
Segment Information
Net sales	625	732	2,403	1,994
Europe
Segment Information
Net sales	47,137	31,485	126,752	86,003
Income (Loss) from Operations	5,139	3,899	7,443	4,180
Total Assets	211,083	178,428	211,083	178,428	165,121
Europe | Intersegment elimination
Segment Information
Net sales	175	157	424	338
Asia/Pacific
Segment Information
Net sales	2,085	2,030	5,828	5,269
Income (Loss) from Operations	(218)	250	(341)	1,257
Total Assets	26,006	26,291	26,006	26,291	$ 25,118
Asia/Pacific | Intersegment elimination
Segment Information
Net sales	$ 4,088	$ 10,821	$ 14,657	$ 22,550

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Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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