Inventories (Tables)

12 Months Ended

Dec. 31, 2018

Inventory Disclosure [Abstract]

Schedule of Inventory, Current

Inventories consist of the following components (dollars in thousands):

	December 31, 2018		December 31, 2017
Finished goods	$	91,780	$	86,310
Work in process	29,080		24,580
Raw materials	52,260		44,460
Total inventories	$	173,120	$	155,350