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Exit Costs and Assets Held for Sale (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2017
Dec. 31, 2016
Jun. 30, 2016
Restructuring Cost and Reserve [Line Items]        
Property, plant and equipment part of disposal group, held for sale $ 10,028 $ 10,028 $ 0 $ 0
Retail | Retail Segment        
Restructuring Cost and Reserve [Line Items]        
Exit charges 3,500 11,300    
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 $ 10,000 $ 10,000