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Earnings Per Share (Tables)
9 Months Ended
Jun. 30, 2021
Earnings Per Share [Abstract]  
Weighted average number of shares used to compute earnings per share The weighted average number of shares outstanding used to compute earnings per share was as follows:
 Three Months Ended June 30,Nine Months Ended June 30,
(shares in thousands)2021202020212020
Basic weighted average shares outstanding62,064 61,882 62,028 63,463 
Dilutive effect of unvested RSUs389 220 272 203 
Denominator for diluted earnings per share62,453 62,102 62,300 63,666