Inventories

6 Months Ended

Jun. 30, 2019

Inventory Disclosure [Abstract]

Inventories

6.  Inventories

Inventories are valued at the lower of cost or market for last-in, first-out (“LIFO”) inventory and lower of cost or net realizable value for first-in, first-out (“FIFO”) inventory. Approximately 30 percent of inventories are valued using the LIFO method of determining cost. All other inventories are valued at the FIFO method of determining cost. An actual valuation of inventory under the LIFO method can be made only at the end of each year based on inventory levels and costs at that time. Accordingly, interim LIFO calculations must be based on management’s estimates of expected year-end inventory levels and costs. Because these calculations are subject to many factors beyond management’s control, annual results may differ from interim results as they are subject to the final year-end LIFO inventory valuation. During 2019 and 2018, one inventory pool had a reduction in inventory quantities that was expected to hold through year-end, and therefore an adjustment was recorded for the quarters and six months ended June 30, 2019 and 2018 to decrease cost of sales by $0.3 million and $0.5 million, respectively, as a result of the liquidation of LIFO inventories.

Inventories consisted of the following:

	June 30,		December 31,
	2019		2018
Finished and in-process products	$	27,034	$	27,960
Raw materials and supplies		15,307		15,636
	$	42,341	$	43,596