Inventories:

6 Months Ended

Jun. 30, 2018

Inventory Disclosure [Abstract]

Inventories [Text Block]

Inventories

Inventories consisted of the following (in thousands): 

	June 30, 2018		December 31, 2017
Raw material	$	78,716	$	82,397
Work in process	53,121		42,304
Finished goods	157,113		163,956
Total inventories	$	288,950	$	288,657