Quarterly report pursuant to Section 13 or 15(d)

Earnings Per Share - Narrative (Details)

v3.10.0.1
Earnings Per Share - Narrative (Details) - shares
3 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Antidilutive securities excluded from computation of earnings per share [Line Items]    
Antidilutive securities excluded from computation of earnings per share, amount 700,000 200,000
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 400,000 400,000