| Earnings Per Share (Tables) | 3 Months Ended | |||||||||||||||||||||||||||||||||||||||||||||||||
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| Dec. 31, 2017 | ||||||||||||||||||||||||||||||||||||||||||||||||||
| 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: 
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- References No definition available. 
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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. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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