GOODWILL AND INTANGIBLE ASSETS (Details 2) (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
Finite-lived intangible assets
Weighted Average Amortization Period	13 years
Cost	$ 46,700,000
Accumulated Amortization	7,478,000
Net Value	39,222,000
Indefinite-lived intangible assets
Net Value	35,122,000
Total intangible assets
Cost	81,822,000
Net Value	74,344,000		75,387,000
Amortization expense on intangible assets
Amortization of intangibles	1,043,000	1,043,000
Trade name
Indefinite-lived intangible assets
Net Value	32,300,000
Other
Indefinite-lived intangible assets
Net Value	2,822,000
Customer relationships
Finite-lived intangible assets
Weighted Average Amortization Period	14 years
Cost	43,500,000
Accumulated Amortization	5,567,000
Net Value	37,933,000
Driver network
Finite-lived intangible assets
Weighted Average Amortization Period	3 years
Cost	3,200,000
Accumulated Amortization	1,911,000
Net Value	1,289,000
Premium Logistics (Panther) | Minimum
Amortization expense on intangible assets
Annual amortization expense on intangible assets expected for the full years 2014 through 2018	3,000,000
Premium Logistics (Panther) | Maximum
Amortization expense on intangible assets
Annual amortization expense on intangible assets expected for the full years 2014 through 2018	$ 4,000,000