Inventories

12 Months Ended

Dec. 31, 2016

Inventories [Abstract]

Inventory Disclosure [Text Block]

INVENTORIES

December 31,	2016		2015
(Dollars in thousands)
Raw materials	$	40,255	$	19,148
Work in process	21,447		21,063
Finished goods	21,135		21,558
Inventories	$	82,837	$	61,769

Service wheel and supplies inventory included in other non-current assets in the consolidated balance sheets totaled $6.5 million and $6.9 million at December 31, 2016 and 2015, respectively. Included in raw materials were operating supplies and spare parts totaling $10.3 million and $9.2 million at December 31, 2016 and 2015, respectively.