Inventories

6 Months Ended

Jun. 30, 2019

Inventory, Net [Abstract]

Inventories

Inventories

Major classes of inventories are as follows:

(in thousands)	June 30, 2019		December 31, 2018		June 30, 2018
Grain and other agricultural products	$	603,318	$	527,471	$	385,118
Frac sand and propane	9,287		—		—
Ethanol and co-products	26,185		11,918		22,828
Plant nutrients and cob products	109,156		145,693		82,230
Railcar repair parts	5,695		5,722		5,435
	$	753,641	$	690,804	$	495,611

Inventories on the Condensed Consolidated Balance Sheets at June 30, 2019, and June 30, 2018, do not include 1.3 million and 0.1 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.