Exit Costs and Assets Held for Sale (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Dec. 31, 2016	Sep. 30, 2016
Restructuring Cost and Reserve [Line Items]
Property, plant and equipment part of disposal group, held for sale	$ 8,383	$ 0	$ 0
Retail | Retail Segment
Restructuring Cost and Reserve [Line Items]
Exit charges	11,500
Retail | Retail Segment | Disposal Group, Held-for-sale, Not Discontinued Operations
Restructuring Cost and Reserve [Line Items]
Property, plant and equipment part of disposal group, held for sale	$ 8,400