Leases

12 Months Ended

Dec. 31, 2011

Leases

5. 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, 2011 are as follows:

2012	$	17,010
2013		17,134
2014		15,429
2015		14,350
2016		13,116
Thereafter		39,676
Total	$	116,715

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 $11,590 in 2011, $9,054 in 2010, and $7,693 in 2009.