PROPERTY, PLANT AND EQUIPMENT - Summary of Property, Plant and Equipment (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Property, Plant and Equipment [Line Items]
Total	$ 341,942	$ 257,722
Accumulated depreciation and amortization	(140,927)	(132,739)
Property, plant and equipment, net	201,015	124,983
Land
Property, Plant and Equipment [Line Items]
Total	7,445	3,124
Buildings and leasehold improvements
Property, Plant and Equipment [Line Items]
Total	39,142	29,690
Machinery and equipment
Property, Plant and Equipment [Line Items]
Total	230,352	174,222
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Total	7,584	6,561
Capitalized ERP system development costs
Property, Plant and Equipment [Line Items]
Total	30,484	25,606
Computers and computer software
Property, Plant and Equipment [Line Items]
Total	11,351	8,062
Automobiles
Property, Plant and Equipment [Line Items]
Total	5,578	5,280
Construction in progress
Property, Plant and Equipment [Line Items]
Total	$ 10,006	$ 5,177