Disposition of Business (Details) - USD ($) |
3 Months Ended | 6 Months Ended | ||||
|---|---|---|---|---|---|---|
Apr. 07, 2015 |
Jan. 31, 2016 |
Apr. 30, 2015 |
Jan. 31, 2015 |
Jan. 31, 2016 |
Jan. 31, 2015 |
|
| Disposition of Business | ||||||
| Diluted earnings per share (in dollars per share) | $ 0.37 | $ 0.27 | $ 0.71 | $ 0.54 | ||
| Specialty Packaging business | Other. | Disposal Group, Disposed of by Sale, Not Discontinued Operations | ||||||
| Disposition of Business | ||||||
| Proceeds from sale of business, net of cash retained and disposal costs | $ 7,531,000 | |||||
| Amount held in escrow | $ 660,000 | |||||
| Loss on sale of business | $ 2,206,000 | |||||
| Diluted earnings per share (in dollars per share) | $ (0.04) | |||||