Property, Plant and Equipment

12 Months Ended

Dec. 31, 2022

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment

3. Property, Plant and Equipment

	Average	December 31,
	useful lives (1)	2022		2021
		(In Thousands)
Machinery, equipment and automotive	25	$	1,283,429	$	1,244,617
Buildings and improvements	26		38,021		44,814
Land improvements	35		8,384		8,271
Furniture, fixtures and store equipment	7		2,438		1,156
Construction in progress	N/A		28,029		15,298
Capital spare parts	N/A		22,300		26,744
Land	N/A		4,567		4,567
			1,387,168		1,345,467
Less accumulated depreciation and amortization			538,507		486,987
		$	848,661	$	858,480

(1) Weighted average useful lives as of December 31, 2022.

Machinery, equipment and automotive primarily includes the categories of property and equipment and estimated useful lives as follows: processing plants and plant infrastructure (15-30 years); certain processing plant components (3-10 years); and trucks, automobiles, trailers, and other rolling stock (4-7 years).