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COMMITMENTS AND CONTINGENCIES (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2016
USD ($)
ft²
Area
Seller
Dec. 31, 2015
USD ($)
Dec. 31, 2014
USD ($)
Dec. 31, 2013
USD ($)
Dec. 31, 2012
USD ($)
Dec. 31, 2011
USD ($)
Dec. 31, 2010
USD ($)
Dec. 31, 2009
USD ($)
Dec. 31, 2008
USD ($)
Dec. 31, 2007
USD ($)
Dec. 31, 2006
USD ($)
Dec. 31, 2005
USD ($)
Dec. 31, 2004
USD ($)
COMMITMENTS AND CONTINGENCIES [Abstract]                          
Operating lease term 6 years                        
Office space subject to operating lease | ft² 20,000                        
Rent expense charged to operations $ 3,134 $ 2,414 $ 1,595                    
Future minimum rental payments required under non-cancelable operating leases [Abstract]                          
2017 2,436                        
2018 2,011                        
2019 1,702                        
2020 1,364                        
2021 1,245                        
Thereafter 8,752                        
Total minimum lease payments 17,510                        
Slate Hill, New York Site [Member] | Maximum [Member]                          
Site Contingency [Line Items]                          
Annual monitoring costs $ 5 $ 5 $ 5 $ 5 $ 5 $ 5 $ 5 $ 5 $ 5 $ 5 $ 5 $ 5 $ 5
Verona, Missouri Facility [Member] | Dioxin Contamination [Member]                          
Site Contingency [Line Items]                          
Number of areas of the site in which capping of areas of residual contamination was performed | Area 4                        
Monitoring period for groundwater and surface water prior to submission of risk assessment report 2 years                        
Number of sellers who have the benefit of certain contractual indemnification by the prior owner | Seller 1