XML 74 R63.htm IDEA: XBRL DOCUMENT v3.10.0.1
COMMITMENTS AND CONTINGENCIES (Details)
$ in Thousands
6 Months Ended 12 Months Ended
Jun. 30, 2018
USD ($)
Seller
Jun. 30, 2017
USD ($)
Dec. 31, 2017
USD ($)
Dec. 31, 2016
USD ($)
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]                                
Rent expense charged to operations $ 1,655 $ 1,613                            
Future minimum rental payments required under all non-cancelable operating leases [Abstract]                                
July 1, 2018 to December 31, 2018 1,555                              
2019 3,156                              
2020 2,785                              
2021 2,342                              
2022 1,611                              
2023 1,220                              
Thereafter 4,369                              
Total minimum lease payments 17,038                              
Slate Hill, New York Site [Member] | Maximum [Member]                                
Environmental remediation costs [Abstract]                                
Annual monitoring costs $ 5   $ 5 $ 5 $ 5 $ 5 $ 5 $ 5 $ 5 $ 5 $ 5 $ 5 $ 5 $ 5 $ 5 $ 5
Verona, Missouri Facility [Member] | Dioxin Contamination [Member]                                
Environmental remediation costs [Abstract]                                
Number of sellers who have the benefit of certain contractual indemnification by the prior owner | Seller 1