|
Stock Award Plan (Details) (USD $)
In Millions, except Share data, unless otherwise specified |
0 Months Ended | 9 Months Ended | 12 Months Ended |
|---|---|---|---|
|
Oct. 31, 2011
|
Apr. 30, 2013
|
Jul. 31, 2012
|
|
| Stock Award Plan [Abstract] | |||
| Shares awarded (in shares) | 62,099 | ||
| Shares awarded, value | $ 0.9 | ||
| Share-based award, vesting period | 3 years | ||
| Excess tax benefits accumulated in Capital in Excess of Par Value | 0.3 | 0.3 | |
| Unrecognized compensation expense | $ 0.4 | $ 0.8 |