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Leases
12 Months Ended
Dec. 31, 2014
Leases, Operating [Abstract]  
Leases
LEASES
In 2011, we entered into leases of certain tractors under operating leases which expire in 2015. Rental expense for these leases is included in rent and purchased transportation expense within the Consolidated Statements of Income. At December 31, 2014, the future minimum lease payments under non-cancelable revenue equipment operating leases are as follows (in thousands):
2015
$
578

Total
$
578


Rental expense under these non-cancelable revenue equipment operating leases for the years ended December 31, 2014, 2013, and 2012 was as follows (in thousands):
 
2014
$
1,565

2013
1,593

2012
1,620