Property, Plant and Equipment Asset Impairment (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended	12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Sep. 30, 2016	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Property, Plant and Equipment [Line Items]
Goodwill	$ 6,708			$ 6,708	$ 6,708
Other Asset Impairment Charges	$ 4,300	$ 4,800	$ 3,200	$ 0	$ 12,490	$ 0