Annual report pursuant to Section 13 and 15(d)

Earnings Per Share - Diluted (Detail)

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Earnings Per Share - Diluted (Detail) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Numerator    
Net income attributable to common shareholders $ 43,121 $ 50,791
Denominator    
Weighted average number of basic common shares outstanding (in shares) 51,421,159 45,605,845
Effect of dilutive securities:    
Weighted average number of diluted common shares outstanding (in shares) 51,427,220 45,919,648
Net income per diluted common share attributable to common stockholders (in dollars per share) $ 0.84 $ 1.11
Options    
Effect of dilutive securities:    
Effect of dilutive securities (in shares) 0 272,915
Restricted Stock    
Effect of dilutive securities:    
Effect of dilutive securities (in shares) 6,061 40,888