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Earnings per share | 12 Months Ended
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Sep. 30, 2018
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 (in thousands):
| Year ended September 30,
| 2018 |  | 2017 |  | 2016
Weighted average shares outstanding | 65,501 |  |  | 65,632 |  |  | 65,822 |
Effect of employee stock options and unvested restricted stock awards | 431 |  |  | 433 |  |  | 407 |
Denominator for diluted earnings per share | 65,932 |  |  | 66,065 |  |  | 66,229 |
For the years ended September 30, 2018, 2017 and 2016, we excluded approximately 5,000, 9,000 and 21,000 unvested restricted stock units, respectively, from the calculation of diluted earnings per share as the effect of including them would have been anti-dilutive.

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- Definition The entire disclosure for earnings per share. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -URI http://asc.fasb.org/topic&trid=2144383 + Details
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