Leases

The Company leases certain property, plant and equipment under operating leases, primarily consisting of railroad equipment leases. Net minimum future rental payments due under non-cancelable operating leases with remaining terms in excess of one year as of December 31, 2016 are as follows:

2017	$	15,272
2018		13,262
2019		14,367
2020		16,174
2021		15,895
Thereafter		37,865
Total	$	112,835

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. For the years ended December 31, 2017 and 2018, minimum future rental payments in the table above are presented net of sublease income related to subleases of railroad equipment of $993 and $581, respectively. Rent expense for all operating leases was $22,040 in 2016, $23,757 in 2015 and $24,116 in 2014. For the years ended December 31, 2016, 2015 and 2014, rent expense is stated net of sublease income of $4,778, $5,031 and $1,816, respectively.