Inventories

3 Months Ended

Mar. 31, 2019

Inventory, Net [Abstract]

Inventories

Inventories

Major classes of inventories are as follows:

(in thousands)	March 31, 2019		December 31, 2018		March 31, 2018
Grain and other agricultural products	$	812,361	$	527,471	$	541,272
Frac sand and propane	8,172		—		—
Ethanol and co-products	16,302		11,918		14,320
Plant nutrients and cob products	183,886		145,693		170,748
Railcar repair parts	5,744		5,722		5,289
	$	1,026,465	$	690,804	$	731,629

Inventories on the Condensed Consolidated Balance Sheets at March 31, 2019, and March 31, 2018, do not include 1.9 million and 0.7 million bushels of grain, respectively, held in storage for others. Grain inventories held in storage for others were de minimis as of December 31, 2018. The Company does not have title to the grain and is only liable for any deficiencies in grade or shortage of quantity that may arise during the storage period. Management has not experienced historical losses on any deficiencies and does not anticipate material losses in the future.