Inventories (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Inventories [Abstract]
Raw materials and supplies	$ 133,473	$ 127,525
Work in process	33,915	30,498
Finished products	91,054	90,352
Inventory reserves	(45,002)	(43,452)
Total Inventory	$ 213,440	$ 204,923