Inventories (Tables)

6 Months Ended

Jun. 30, 2021

Inventory, Net [Abstract]

Classes of inventories

(in thousands)	June 30, 2021		December 31, 2020		June 30, 2020
Grain and other agricultural products (a)	$	636,380	$	1,025,809	$	452,339
Frac sand and propane (a)	11,265		12,477		6,498
Ethanol and co-products (a)	155,993		114,895		63,195
Plant nutrients and cob products	101,286		139,885		87,346
Railcar repair parts	7,375		7,627		6,945
Total Inventories	$	912,299	$	1,300,693	$	616,323

(a) Includes RMI of $612.2 million, $983.2 million and $418.0 million at June 30, 2021, December 31, 2020 and June 30, 2020, respectively.