Quarterly report pursuant to Section 13 or 15(d)

Earnings Per Share - Narrative (Details)

v3.4.0.3
Earnings Per Share - Narrative (Details) - shares
3 Months Ended 6 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Mar. 31, 2016
Mar. 31, 2015
Antidilutive securities excluded from computation of earnings per share [Line Items]        
Antidilutive securities excluded from computation of earnings per share, amount 1,300,000 700,000 700,000 700,000
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     800,000 1,400,000