GOODWILL AND INTANGIBLE ASSETS (Intangible) (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2018	Dec. 31, 2017
Finite-lived intangible assets
Weighted Average Amortization Period	13 years
Cost	$ 64,663	$ 64,663
Accumulated Amortization	25,757	23,494
Net Value	38,906	41,169
Total intangible assets
Cost	96,963	96,963
Net Value	71,206	73,469
Trade name
Indefinite-lived intangible assets
Net Value	$ 32,300	32,300
Customer relationships
Finite-lived intangible assets
Weighted Average Amortization Period	14 years
Cost	$ 60,431	60,431
Accumulated Amortization	21,938	19,745
Net Value	$ 38,493	40,686
Driver network
Finite-lived intangible assets
Weighted Average Amortization Period	3 years
Cost	$ 3,200	3,200
Accumulated Amortization	$ 3,200	3,200
Other intangible assets
Finite-lived intangible assets
Weighted Average Amortization Period	9 years
Cost	$ 1,032	1,032
Accumulated Amortization	619	549
Net Value	$ 413	$ 483