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BUSINESS ACQUISITION - Fair Value of Goodwill (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Feb. 11, 2020
Dec. 31, 2019
Disclosure of detailed information about business combination [line items]      
Goodwill $ 132,894   $ 107,677
Nortech Packaging Acquisition      
Disclosure of detailed information about business combination [line items]      
Less: fair value of net identifiable assets acquired   $ 21,354  
Goodwill   25,640  
Nortech Packaging Acquisition | Gross carrying amount      
Disclosure of detailed information about business combination [line items]      
Consideration transferred   $ 46,994