Annual report pursuant to Section 13 and 15(d)

Earnings Per Share - Antidilutive Securities (Detail)

v3.10.0.1
Earnings Per Share - Antidilutive Securities (Detail) - shares
12 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Earnings Per Share [Abstract]    
Common stock excluded from calculation of diluted earnings per share (in shares) 0 768,984