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ACQUISITIONS - Identifiable Intangible Assets and Estimated Useful Lives (Details) - USD ($)
$ in Thousands
Mar. 02, 2020
May 22, 2019
Feb. 28, 2019
Prime Distribution Services      
Business Acquisition [Line Items]      
Identifiable intangible assets $ 55,000    
Customer relationships | Prime Distribution Services      
Business Acquisition [Line Items]      
Estimated life (years) 7 years    
Identifiable intangible assets $ 55,000    
Customer relationships | Dema Service      
Business Acquisition [Line Items]      
Estimated life (years)   7 years  
Identifiable intangible assets   $ 4,252  
Customer relationships | Space Cargo      
Business Acquisition [Line Items]      
Estimated life (years)     7 years
Identifiable intangible assets     $ 16,439