REVENUE AND LONG-LIVED ASSETS - Net Sales and Long Lived Assets by Region (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Revenues from External Customers and Long-Lived Assets [Line Items]
Net Sales	$ 179,968	$ 195,690	$ 176,888	$ 159,160	$ 159,716	$ 153,363	$ 153,089	$ 148,933	$ 711,706	$ 615,101	$ 601,119
Long - Lived Assets	94,469				89,247				94,469	89,247	71,232
North America
Revenues from External Customers and Long-Lived Assets [Line Items]
Net Sales									574,806	527,134	537,308
Long - Lived Assets	90,036				85,707				90,036	85,707	68,556
Foreign
Revenues from External Customers and Long-Lived Assets [Line Items]
Net Sales									136,900	87,967	63,811
Long - Lived Assets	$ 4,433				$ 3,540				$ 4,433	$ 3,540	$ 2,676