Revenues Disaggregated Revenues (Details) - USD ($) $ in Thousands	3 Months Ended
	May 31, 2020	May 31, 2019
Disaggregation of Revenue [Line Items]
Revenues	$ 213,293	$ 289,123
Industrial [Member]
Disaggregation of Revenue [Line Items]
Revenues	130,109	164,800
Transmission and Distribution [Member]
Disaggregation of Revenue [Line Items]
Revenues	49,057	72,281
Power Generation [Member]
Disaggregation of Revenue [Line Items]
Revenues	$ 34,127	$ 52,042