Inventories, Net (Tables)

3 Months Ended

Mar. 31, 2018

Inventory Disclosure [Abstract]

Schedule of Inventories Net

	March 31,			December 31,			March 31,
	2018			2017			2017
	(Dollars in Thousands)
Finished products	$	563,315		$	552,999		$	495,793
Products in process and raw materials		62,857			62,761			61,815
Supplies and expendable parts		128,754			128,792			120,054
		754,926			744,552			677,662
Less: Allowances		(148,132	)		(143,961	)		(140,662	)
Total	$	606,794		$	600,591		$	537,000