Intangibles and Goodwill - Estimated Annual Amortization Expense (Details) |
Oct. 31, 2016
USD ($)
|
|---|---|
| Estimated annual amortization expense of intangible assets for next five years | |
| Nine month period ending July 31, 2016 | $ 11,538,000 |
| 2018 | 15,129,000 |
| 2019 | 14,805,000 |
| 2020 | 13,056,000 |
| 2021 | 12,736,000 |
| 2022 | $ 12,000,000 |