Intangible Assets and Goodwill (Narrative) (Details) - USD ($) |
3 Months Ended | 6 Months Ended | 12 Months Ended | ||
|---|---|---|---|---|---|
May 31, 2016 |
May 31, 2015 |
May 31, 2016 |
May 31, 2015 |
Nov. 30, 2015 |
|
| Goodwill and Intangible Assets Disclosure [Abstract] | |||||
| Intangible assets, amortization expense | $ 7,100,000 | $ 7,300,000 | $ 14,300,000 | $ 15,100,000 | |
| Goodwill impairment loss | $ 0 | ||||