Goodwill and Intangible Assets - Schedule of Goodwill (Details) - USD ($) $ in Thousands |
12 Months Ended | |
|---|---|---|
Feb. 29, 2016 |
Feb. 28, 2015 |
|
| Goodwill [Roll Forward] | ||
| Goodwill, beginning balance | $ 279,074 | $ 278,556 |
| Acquisitions | 15,576 | 4,113 |
| Foreign Exchange Translation | (2,123) | (3,595) |
| Goodwill, ending balance | 292,527 | 279,074 |
| Galvanizing Services [Member] | ||
| Goodwill [Roll Forward] | ||
| Goodwill, beginning balance | 95,538 | 94,731 |
| Acquisitions | 15,576 | 3,306 |
| Foreign Exchange Translation | (1,800) | (2,499) |
| Goodwill, ending balance | 109,314 | 95,538 |
| Energy [Member] | ||
| Goodwill [Roll Forward] | ||
| Goodwill, beginning balance | 183,536 | 183,825 |
| Acquisitions | 0 | 807 |
| Foreign Exchange Translation | (323) | (1,096) |
| Goodwill, ending balance | $ 183,213 | $ 183,536 |