5. 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, 2015 are as follows:


2016	$	17,197
2017		19,445
2018		17,396
2019		14,519
2020		14,102
Thereafter		49,555

Total	$	132,214

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, 2016, 2017 and 2018, minimum future rental payments in the table above are presented net of sublease income related to subleases of railroad equipment of $4,872, $301 and $71, respectively. Rent expense for all operating leases was $23,757 in 2015, $24,116 in 2014 and $22,542 in 2013. For the years ended December 31, 2015, 2014 and 2013, rent expense is stated net of sublease income of $5,031, $1,816 and $208, respectively.