Property, Plant and Equipment (Tables)

12 Months Ended

Dec. 31, 2019

Property Plant And Equipment [Abstract]

Schedule of Property, Plant and Equipment

	(in thousands)
December 31,	2019			2018
Land and improvements, net	$	719,736		$	654,786
Buildings and improvements		1,413,690			1,283,182
Machinery and equipment		11,630,179			11,101,840
Proved oil and gas properties		558,123			557,383
Leasehold interest in unproved oil and gas properties		165,000			165,000
Construction in process and equipment deposits		1,108,054			762,884
		15,594,782			14,525,075
Less accumulated depreciation		(9,416,227	)		(9,190,327	)
	$	6,178,555		$	5,334,748