Operating Leases

12 Months Ended

Dec. 31, 2017

OPERATING LEASES

The Company leases certain land and equipment under operating leases. Total rent expense under operating leases was $20,013, $22,487 and $19,814 for the years ended December 31, 2017, 2016 and 2015, respectively. For each of the next five calendar years and thereafter, future minimum lease payments under operating leases that have initial or remaining noncancelable lease terms in excess of one year are as follows:



	Total Payments
2018	$	17,032
2019	14,243
2020	9,330
2021	8,900
2022	2,052
Thereafter	14,953
Total minimum payments	$	66,510

The Company's leases consist primarily of access to distribution terminals, biomass-based diesel storage facilities, railcars and vehicles. At the end of the lease term the Company, generally, has the option to (a) return the leased equipment to the lessor, (b) purchase the property at its then fair value or (c) renew its lease at the then fair rental value on a year-to-year basis or for an agreed upon term. Certain leases allow for adjustment to minimum rentals in future periods as determined by the Consumer Price Index.