SEGMENT INFORMATION, Geographic Revenue Information and Geographic Area Data - Long-Lived Assets (Excluding Intangible Assets) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	$ 140,760	$ 138,509	$ 138,794	$ 135,141	$ 132,729	$ 140,128	$ 134,773	$ 144,862	$ 553,204	$ 552,492	$ 541,383
Long-lived assets, excluding intangible assets [Abstract]
Long-lived assets, excluding intangible assets	165,754				158,515				165,754	158,515	131,588
United States [Member] | Reportable Geographical Components [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									420,821	441,664	420,324
Foreign Countries [Member] | Reportable Geographical Components [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									132,383	110,828	121,059
North America [Member] | Reportable Geographical Components [Member]
Long-lived assets, excluding intangible assets [Abstract]
Long-lived assets, excluding intangible assets	154,007				148,209				154,007	148,209	121,090
Europe [Member] | Reportable Geographical Components [Member]
Long-lived assets, excluding intangible assets [Abstract]
Long-lived assets, excluding intangible assets	$ 11,747				$ 10,306				$ 11,747	$ 10,306	$ 10,498