DERIVATIVE FINANCIAL INSTRUMENTS	12 Months Ended
Jan. 31, 2015
Derivative Instruments and Hedging Activities Disclosure [Abstract]
DERIVATIVE FINANCIAL INSTRUMENTS	DERIVATIVE FINANCIAL INSTRUMENTS Hedging Derivatives In order to manage fluctuations in cash flows resulting from changes in diesel fuel costs, the Company entered into fuel derivative contracts with third parties. The Company hedged 1.6 million, 2.8 million and 4.8 million gallons of diesel fuel in 2014, 2013 and 2012, respectively. These hedges represented approximately 10%, 20% and 35% of the total domestic truckload fuel needs in 2014, 2013 and 2012, respectively. The Company currently has fuel derivative contracts to hedge 6.6 million gallons of diesel fuel, or approximately 40% of the Company's domestic truckload fuel needs from February 2015 through January 2016. Under these contracts, the Company pays the third party a fixed price for diesel fuel and receives variable diesel fuel prices at amounts approximating current diesel fuel costs, thereby creating the economic equivalent of a fixed-rate obligation. These derivative contracts do not qualify for hedge accounting and therefore all changes in fair value for these derivatives are included under "Other (income) expense, net" on the accompanying consolidated income statements. The fair value of these contracts at January 31, 2015 was a liability of $5.7 million.

DERIVATIVE FINANCIAL INSTRUMENTS

Hedging Derivatives

In order to manage fluctuations in cash flows resulting from changes in diesel fuel costs, the Company entered into fuel derivative contracts with third parties. The Company hedged 1.6 million, 2.8 million and 4.8 million gallons of diesel fuel in 2014, 2013 and 2012, respectively. These hedges represented approximately 10%, 20% and 35% of the total domestic truckload fuel needs in 2014, 2013 and 2012, respectively. The Company currently has fuel derivative contracts to hedge 6.6 million gallons of diesel fuel, or approximately 40% of the Company's domestic truckload fuel needs from February 2015 through January 2016. Under these contracts, the Company pays the third party a fixed price for diesel fuel and receives variable diesel fuel prices at amounts approximating current diesel fuel costs, thereby creating the economic equivalent of a fixed-rate obligation. These derivative contracts do not qualify for hedge accounting and therefore all changes in fair value for these derivatives are included under "Other (income) expense, net" on the accompanying consolidated income statements. The fair value of these contracts at January 31, 2015 was a liability of $5.7 million.