Sales Disaggregated Revenues (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Aug. 31, 2021	Aug. 31, 2020	Aug. 31, 2021	Aug. 31, 2020
Disaggregation of Revenue [Line Items]
Revenues	$ 216,447	$ 203,372	$ 446,273	$ 416,664
Industrial
Disaggregation of Revenue [Line Items]
Revenues	132,033	67,112	285,615	197,220
Transmission and distribution
Disaggregation of Revenue [Line Items]
Revenues	47,619	97,619	89,255	146,676
Power generation
Disaggregation of Revenue [Line Items]
Revenues	$ 36,795	$ 38,641	$ 71,403	$ 72,768

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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+ Details