Property, Plant and Equipment (Tables)

12 Months Ended

Dec. 31, 2020

Property, Plant and Equipment

Schedule of property, plant and equipment

December 31,	2020		2019
(in thousands)
Land	$	19,474	$	18,945
Buildings and leasehold improvements		122,289		114,318
Operating equipment		645,576		1,194,071
Computer software		24,681		25,247
Furniture and fixtures		6,692		7,086
Vehicles		236,411		553,968
Gross property, plant and equipment		1,055,123		1,913,635
Less: accumulated depreciation		(790,712)		(1,396,908)
Net property, plant and equipment	$	264,411	$	516,727