Change in Accounting Principle: Inventories Components of Inventories (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Inventory Disclosure [Abstract]
Raw materials	$ 239,673	$ 212,027
Work in process	12,739	13,898
Finished goods	195,538	209,972
Supplies and materials	169,012	158,394
Inventories	$ 616,962	$ 594,291