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GOODWILL AND INTANGIBLE ASSETS - Components of Intangible Assets (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Schedule of Intangible Assets Disclosure [Line Items]        
Goodwill, Gross $ 49,371 $ 92,361    
Goodwill, Accumulated Impairment (19,100) (42,990)    
Goodwill, Net 30,271 49,371 $ 91,690 $ 15,772
Indefinite-Lived Trade Names, Gross 50,600 58,216    
Indefinite-lived intangible assets, Impairment (1,000)      
Indefinite-Lived Trade Names, Net 49,600 58,216    
Finite-Lived Intangible Assets, Gross 352,231 393,558    
Finite-Lived Intangible Assets, Accumulated Amortization (88,106) (70,097)    
Finite-Lived Intangible Assets, Net 244,025 280,471    
Impairment of Intangible Assets, Indefinite-lived, Including Goodwill (20,100) (42,990)    
Licenses        
Schedule of Intangible Assets Disclosure [Line Items]        
Finite-Lived Intangible Assets, Gross 15,847 15,847    
Finite-Lived Intangible Assets, Accumulated Amortization (10,742) (10,287)    
Finite-Lived Intangible Assets, Net 5,105 5,560    
Trade Names        
Schedule of Intangible Assets Disclosure [Line Items]        
Finite-Lived Intangible Assets, Gross 52,030 43,986    
Finite-Lived Intangible Assets, Accumulated Amortization (20,874) (17,337)    
Finite-Lived Intangible Assets, Net $ 31,156 26,649    
Intangible assets acquired, estimated useful life 18 years      
Customer relationships        
Schedule of Intangible Assets Disclosure [Line Items]        
Finite-Lived Intangible Assets, Gross $ 177,801 176,602    
Finite-Lived Intangible Assets, Accumulated Amortization (54,008) (40,605)    
Finite-Lived Intangible Assets, Net 123,793 135,997    
Other        
Schedule of Intangible Assets Disclosure [Line Items]        
Finite-Lived Intangible Assets, Gross 6,582 6,546    
Finite-Lived Intangible Assets, Accumulated Amortization (2,482) (1,868)    
Finite-Lived Intangible Assets, Net $ 4,100 $ 4,678