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Earnings per share (Tables) | 12 Months Ended
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Sep. 30, 2020
Earnings Per Share [Abstract] |
Schedule of the components of basic and diluted earnings per share | The weighted average number of shares outstanding used to compute earnings per share was as follows:
| Year ended September 30,
(in thousands) | 2020 |  | 2019 |  | 2018
Weighted average shares outstanding | 63,062 |  |  | 64,498 |  |  | 65,501 |
Dilutive effect of unvested restricted stock awards | 260 |  |  | 322 |  |  | 431 |
Denominator for diluted earnings per share | 63,322 |  |  | 64,820 |  |  | 65,932 |

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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