Property, Plant and Equipment (Tables)

12 Months Ended

Dec. 31, 2017

Property, Plant and Equipment, at Cost

Property, plant and equipment, at cost, consisted of the following (in thousands):

	December 31,
	2017			2016
Land	$	68,562		$	68,562
Buildings and leasehold improvements		205,534			163,333
Machinery and equipment		466,325			440,955
		740,421			672,850
Less: Accumulated depreciation		(367,954	)		(319,473	)
Total property, plant and equipment, net	$	372,467		$	353,377