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Earnings Per Share - Schedule of Earnings Per Share, Basic and Diluted (Details) - shares
3 Months Ended 9 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Weighted-Average Common Shares Outstanding        
Basic weighted-average common shares outstanding 68,781,801 68,087,363 68,510,847 68,155,389
Dilutive stock options and other equity-based compensation awards 829,844 492,575 724,429 642,231
Diluted weighted-average common shares outstanding 69,611,645 68,579,938 69,235,276 68,797,620