Property, Plant and Equipment (Tables)

12 Months Ended

Dec. 31, 2015

Property, Plant and Equipment [Abstract]

Schedule of Property, Plant and Equipment

	(in thousands) December 31,
	2015			2014
Land and improvements	$	585,057		$	576,511
Buildings and improvements		1,033,610			1,018,342
Machinery and equipment		10,229,602			10,080,640
Proved oil and gas properties		586,362			584,466
Construction in process and equipment deposits		197,278			193,594
		12,631,909			12,453,553
Less accumulated depreciation		(7,740,756	)		(7,165,914	)
	$	4,891,153		$	5,287,639