Property, Plant and Equipment (Tables)

12 Months Ended

Dec. 31, 2021

Property, Plant and Equipment [Abstract]

Summary of Property, Plant and Equipment

Property, plant and equipment consist of the following as of December 31 (in thousands):

	2021			2020
Machinery and equipment	$	471,667		$	312,870
Building and improvements		101,609			61,860
Forklifts and tractors		18,584			16,003
Computer equipment		15,022			11,948
Furniture and fixtures		2,283			1,534
Construction in process		87,700			157,465
Land		22,911			11,351
Total property, plant and equipment		719,776			573,031
Accumulated depreciation		(259,411	)		(236,494	)
Total property, plant and equipment, net	$	460,365		$	336,537