Property, Plant, and Equipment, net

3 Months Ended

Mar. 31, 2020

Property Plant And Equipment [Abstract]

3.	Property, Plant, and Equipment, net

At March 31, 2020 and December 31, 2019, property, plant, and equipment consisted of the following:

	March 31, 2020			December 31, 2019
	(in thousands)
Land and improvements	$	225,107		$	230,300
Mineral rights properties		664,437			677,238
Machinery and equipment		1,315,919			1,338,411
Buildings and improvements		322,468			327,314
Railroad equipment		59,917			59,761
Furniture, fixtures, and other		5,148			5,382
Assets under construction		102,079			103,715
		2,695,075			2,742,121
Accumulated depletion and depreciation		(1,312,827	)		(1,322,139	)
Property, plant, and equipment, net	$	1,382,248		$	1,419,982

Finance right-of-use assets are included within machinery and equipment.

We are required to evaluate the recoverability of the carrying amount of our long-lived asset groups whenever events or changes in circumstances indicate that the carrying amount of the asset groups may not be recoverable. We performed an analysis of impairment indicators of the asset groups and the precipitous decline in oil and gas markets required a review of the assets of our Energy segment for recoverability. We have concluded that the asset groups within our Energy segment were recoverable at March 31, 2020; however, there is a risk that we will be unable to recover certain asset groups within our Energy segment, associated with our West Texas operations, due to the capacity reduction decisions made in the second quarter of 2020. These reductions are being evaluated to determine if they will impact future undiscounted cashflows of the asset groups, that as of March 31, 2020 have a carrying value of approximately $300 million, a portion of which may be deemed impaired.