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Earnings Per Share
6 Months Ended
Mar. 31, 2019
Earnings Per Share [Abstract]  
Earnings Per Share Earnings Per Share
The weighted average number of shares outstanding used to compute earnings per share was as follows:
 Three Months Ended March 31,Six Months Ended March 31,
(shares in thousands)2019 2018 2019 2018 
Basic weighted average shares outstanding64,369 65,856 64,600 65,857 
Dilutive effect of unvested RSUs274 412 217 366 
Denominator for diluted earnings per share64,643 66,268 64,817 66,223