Inventories	12 Months Ended
	Dec. 31, 2022
Inventory Disclosure [Abstract]
Inventories	Inventories:Inventories are measured using the last-in, first-out (LIFO) method of valuation because it results in a better matching of current costs and revenues. The excess of current costs over our carrying value of inventories was approximately $45,545,000 and $34,704,000 at December 31, 2022 and 2021, respectively. The use of the LIFO valuation method as compared to the FIFO method had a negative impact on our cost of goods sold of approximately $10,841,000 in 2022, $12,310,000 in 2021 and $636,000 in 2020. During 2020, there were liquidations of LIFO inventory layers. The effect of the liquidations (included in the preceding LIFO impact amounts) decreased cost of goods sold. The effect of the liquidations during 2020 decreased cost of goods sold by approximately $562,000 or $0.03 per diluted share of common stock. We believe this information is meaningful to the users of these consolidated financial statements for analyzing the effects of price changes, for better understanding our financial position and for comparing such effects with other companies.