Revenue (Tables)

12 Months Ended

Dec. 31, 2018

Revenue from Contract with Customer [Abstract]

Disaggregation of Revenue [Table Text Block]

The following table presents the Company’s disaggregated net sales by primary end market served (dollars in thousands):

	Year ended December 31,
Customer End Markets	2018		2017		2016
Consumer	$	276,740	$	259,470	$	259,390
Aerospace	185,920		184,310		174,920
Industrial	212,160		189,550		182,280
Oil and gas	202,320		184,410		177,430
Total net sales	$	877,140	$	817,740	$	794,020