Quarterly report pursuant to Section 13 or 15(d)

Divestitures Divestitures (Details)

v3.7.0.1
Divestitures Divestitures (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2017
Mar. 31, 2017
Sep. 30, 2016
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Dec. 31, 2016
Sep. 08, 2016
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                
Disposal Group, Including Discontinued Operation, Consideration $ 0       $ 0      
Disposal Group, Not Discontinued Operation, Loss (Gain) on Write-down         0 $ 20,400    
Asset impairment $ 0     $ (20,400) $ 0 $ (20,400)    
Other Nonoperating Income   $ 900            
Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member]                
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                
Disposal Group, Including Discontinued Operation, Consideration               $ 1,000
Gain Contingency, Unrecorded Amount               $ 2,000
Disposal Group, Not Discontinued Operation, Loss (Gain) on Write-down       $ 20,400        
Asset impairment     $ (10,800)          
Transaction and Exit Costs             $ 3,500