Quarterly report pursuant to Section 13 or 15(d)

Earnings Per Share - Narrative (Details)

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Earnings Per Share - Narrative (Details) - shares
3 Months Ended 9 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Antidilutive securities excluded from computation of earnings per share [Line Items]        
Antidilutive securities excluded from computation of earnings per share, amount 700,000 400,000 700,000 400,000
Performance-based stock awards (maximum that can be earned)        
Antidilutive securities excluded from computation of earnings per share [Line Items]        
Antidilutive securities excluded from computation of earnings per share, amount     1,400,000 1,800,000