Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies Summary of Significant Accounting Policies (Details)

v3.7.0.1
Summary of Significant Accounting Policies Summary of Significant Accounting Policies (Details) - USD ($)
3 Months Ended 9 Months Ended
Jun. 30, 2017
Jun. 30, 2017
Jun. 30, 2016
Sep. 30, 2016
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Increase (Decrease) in Deferred Income Taxes   $ (30,300,000) $ 7,100,000  
New Accounting Pronouncement, Early Adoption, Effect [Member]        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Increase (Decrease) in Deferred Income Taxes $ 2,600,000      
Adjustments for New Accounting Pronouncement [Member]        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Debt Issuance Costs, Net $ 1,000,000 $ 1,000,000   $ 1,200,000.0