Note 19 - Income Taxes (Details) - Effective Tax Rate |
12 Months Ended | ||
|---|---|---|---|
May. 31, 2015 |
May. 31, 2014 |
May. 31, 2013 |
|
| Effective Tax Rate [Abstract] | |||
| Federal statutory tax rate | 35.00% | 35.00% | 35.00% |
| State income taxes, net of federal tax benefit | 5.90% | 0.80% | 3.70% |
| Foreign taxes, including rate differential | 1.60% | (0.10%) | (0.90%) |
| Incremental U.S. benefit related to foreign dividends | (2.10%) | 0.40% | 0.80% |
| Tax Credits | 2.50% | 0.20% | 1.90% |
| Permanent items | (1.50%) | (0.30%) | (1.30%) |
| Change in election related to foreign tax credits | (69.40%) | ||
| Unremitted Subsidiary earnings | (4.70%) | ||
| Impairment of Goodwill | (28.30%) | ||
| Acquistion-related items | 0.80% | ||
| Change in analysis of uncertain income tax positions | 0.30% | (0.10%) | 0.90% |
| Valuation Allowance | (1.70%) | (0.40%) | (1.50%) |
| Other | (0.50%) | ||
| Effective tax rate | (34.60%) | 8.00% | 38.60% |