Note 4 - Investment Securities (Details) - Investment Securities - USD ($) $ in Millions |
May. 30, 2015 |
Feb. 28, 2015 |
|---|---|---|
| Available-for-sale securities: | ||
| Long term | $ 47.9 | $ 47.9 |
| Trading securities: | ||
| Long term | 52.6 | 49.2 |
| Held-to-maturity securities: | ||
| Short term | 76.9 | 110.0 |
| Total investment securities | $ 177.4 | $ 207.1 |