Quarterly report pursuant to Section 13 or 15(d)

Earnings Per Share - Narrative (Details)

v3.7.0.1
Earnings Per Share - Narrative (Details) - shares
3 Months Ended 9 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Antidilutive securities excluded from computation of earnings per share [Line Items]        
Antidilutive securities excluded from computation of earnings per share, amount 600,000 800,000 800,000 700,000
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     600,000 800,000