Revenues Disaggregated Revenues (Details) - USD ($) $ in Thousands |
3 Months Ended | |
|---|---|---|
May 31, 2019 |
May 31, 2018 |
|
| Disaggregation of Revenue [Line Items] | ||
| Revenues | $ 289,123 | $ 262,236 |
| Industrial [Member] | ||
| Disaggregation of Revenue [Line Items] | ||
| Revenues | 164,800 | 151,308 |
| Transmission and Distribution [Member] | ||
| Disaggregation of Revenue [Line Items] | ||
| Revenues | 72,281 | 65,954 |
| Power Generation [Member] | ||
| Disaggregation of Revenue [Line Items] | ||
| Revenues | $ 52,042 | $ 44,974 |