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LEASES AND RELATED PARTY LEASES - Narrative (Details)
 9 Months Ended 12 Months Ended
Sep. 30, 2019
USD ($)
renewal_option
Sep. 30, 2018
USD ($)
Dec. 31, 2018
USD ($)
Jun. 30, 2019
USD ($)
Operating Leased Assets [Line Items]        
Number of renewal options (or more) | renewal_option 1      
Operating lease expense $ 14,200,000 $ 11,800,000    
Right of use asset - operating leases 97,738,000      
Operating lease liability 108,655,000      
Operating lease expense, Topic 840     $ 16,300,000  
Future minimum lease payments, capital leases     $ 0  
NEW JERSEY        
Operating Leased Assets [Line Items]        
Operating lease, term     18 years  
Right of use asset - operating leases       $ 35,600,000
Operating lease liability       $ 35,600,000
Related Parties        
Operating Leased Assets [Line Items]        
Operating lease expense $ 200,000 $ 200,000    
Operating lease expense, Topic 840     $ 300,000  
Percent of manufacturing facility owned by corporation whose shareholders are trusts whose beneficiaries include family members of company's former director 50.00%      
Annual rate of lease agreement $ 300,000      
Related Parties | Five Year Option Lease From November 1, 2032 Through October 31, 2037        
Operating Leased Assets [Line Items]        
Option to extend lease, years 5 years      
Period for extended lease November 1, 2032 through October 31, 2037      
Related Parties | Five Year Option Lease From November 1, 2037 Through October 31, 2042        
Operating Leased Assets [Line Items]        
Option to extend lease, years 5 years      
Period for extended lease November 1, 2037 through October 31, 2042