Leases

12 Months Ended

Dec. 31, 2012

Leases

4. Leases

The Company leases certain property, plant and equipment under operating leases, primarily consisting of railroad equipment leases. Minimum future rental payments due under non-cancelable operating leases with remaining terms in excess of one year as of December 31, 2012 are as follows:

2013	$	15,127
2014		17,123
2015		16,640
2016		13,939
2017		12,440
Thereafter		45,266
Total	$	120,535

Leases of railroad equipment generally provide for renewal options at their fair rental value at the time of renewal. In the normal course of business, operating leases for railroad equipment are generally renewed or replaced by other leases. Rent expense for all operating leases was $21,452 in 2012, $11,590 in 2011 and $9,054 in 2010.