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Basis of Presentation Basis of Presentation - Cequent Spinoff (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended 7 Months Ended 9 Months Ended
Sep. 30, 2015
Jun. 30, 2015
Sep. 30, 2014
Jun. 30, 2015
Jun. 30, 2015
Sep. 30, 2015
Sep. 30, 2014
Presentation of spin-off costs [Line Items]              
Cash distribution received from Cequent spin-off   $ 214,500          
Cequent Spin-off, one-time costs       $ 29,000 $ 30,000    
Debt financing and extinguishment costs $ 0   $ 0     $ (1,970) $ 0
Discontinued Operations [Member]              
Presentation of spin-off costs [Line Items]              
Debt financing costs         18,000    
Deferred finance costs   9,000   9,000 9,000    
Continuing Operations [Member]              
Presentation of spin-off costs [Line Items]              
Debt financing and extinguishment costs and deferred finance costs   3,000          
Debt financing and extinguishment costs   2,000          
Deferred Finance Costs, Noncurrent, Net   $ 1,400   $ 1,400 $ 1,400