CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (Parenthetical) - shares |
12 Months Ended | ||
|---|---|---|---|
Sep. 30, 2020 |
Sep. 30, 2019 |
Sep. 30, 2018 |
|
| Statement of Stockholders' Equity [Abstract] | |||
| Purchase of treasury stock (in shares) | 173,576 | 709,970 | 393,864 |
| Issuance of treasury stock (in shares) | 12,125 | 3,782 | 326,827 |
| Cancellation of treasury stock (in shares) | 23,461 | 20,114 | 6,756 |
| Contribution of treasury stock (in shares) | 668,000 | ||
| X | ||||||||||
- Definition Treasury Stock, Shares, Contributed No definition available.
|
| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- Definition Number of treasury shares or units reissued. Excludes reissuance of shares or units in treasury for award under share-based payment arrangement. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Number of shares that have been repurchased during the period and are being held in treasury. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Number of shares of common and preferred stock retired from treasury during the period. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|