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FAIR VALUE (Details) - USD ($)
$ in Thousands
Mar. 31, 2016
Dec. 31, 2015
Assets    
Other long term assets $ 3,651 $ 2,631
Recurring basis | Level 1    
Assets    
Pension Plan Assets 4,910 4,986
Other long term assets 3,146 2,631
Recurring basis | Level 2    
Assets    
Interest rate swaps $ (131) $ (27)