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GOODWILL AND INTANGIBLE ASSETS (Intangible) (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2017
Dec. 31, 2016
Finite-lived intangible assets    
Weighted Average Amortization Period 13 years  
Cost $ 64,663 $ 64,663
Accumulated Amortization 20,092 18,956
Net Value 44,571 45,707
Indefinite-lived intangible assets    
Net Value 34,800 34,800
Total intangible assets    
Cost 99,463 99,463
Net Value 79,371 80,507
Trade name    
Indefinite-lived intangible assets    
Net Value 32,300 32,300
Other    
Indefinite-lived intangible assets    
Net Value $ 2,500 2,500
Customer relationships    
Finite-lived intangible assets    
Weighted Average Amortization Period 14 years  
Cost $ 60,431 60,431
Accumulated Amortization 16,450 15,350
Net Value 43,981 45,081
Customer relationships | LDS    
Finite-lived intangible assets    
Cost $ 7,700  
Driver network    
Finite-lived intangible assets    
Weighted Average Amortization Period 3 years  
Cost $ 3,200 3,200
Accumulated Amortization $ 3,200 3,200
Other    
Finite-lived intangible assets    
Weighted Average Amortization Period 9 years  
Cost $ 1,032 1,032
Accumulated Amortization 442 406
Net Value $ 590 $ 626