Revenues Contract Liability (Details) - USD ($) $ in Thousands |
3 Months Ended | |||
|---|---|---|---|---|
May 31, 2019 |
May 31, 2018 |
Feb. 28, 2019 |
Feb. 28, 2018 |
|
| Contract Liability [Abstract] | ||||
| Contract with Customer, Liability | $ 22,319 | $ 21,838 | $ 56,928 | $ 22,698 |
| Increase (Decrease) in Contract with Customer, Liability | 10,970 | 16,441 | ||
| Contract with Customer, Liability, Revenue Recognized | $ (45,579) | $ (17,301) | ||