Treasury Stock - Narrative (Details) - shares |
Sep. 30, 2017 |
May 31, 2017 |
Mar. 31, 2017 |
Sep. 30, 2015 |
Sep. 30, 2013 |
|---|---|---|---|---|---|
| Stockholders' Equity Note [Abstract] | |||||
| Number of shares authorized to be repurchased (up to) (in shares) | 7,000,000 | 2,000,000 | 5,000,000 | 170,000 | 105,000 |
| X | ||||||||||
- Definition The number of shares authorized to be repurchased by an entity's Board of Directors under a stock repurchase plan. No definition available.
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| X | ||||||||||
- References No definition available.
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