Goodwill and Intangible Assets - Schedule of Goodwill (Details) - USD ($) $ in Thousands	12 Months Ended
Feb. 29, 2020	Feb. 28, 2019
Goodwill [Roll Forward]
Goodwill, beginning balance	$ 323,756	$ 321,307
Acquisitions	39,419	3,063
Divestiture	(7,888)
Other	1,413
Currency Translation Adjustment	(475)	(614)
Goodwill, ending balance	356,225	323,756
Galvanizing Services [Member]
Goodwill [Roll Forward]
Goodwill, beginning balance	116,691	117,232
Acquisitions	39,419	73
Divestiture	0
Other	1,413
Currency Translation Adjustment	(475)	(614)
Goodwill, ending balance	157,048	116,691
Energy [Member]
Goodwill [Roll Forward]
Goodwill, beginning balance	207,065	204,075
Acquisitions	0	2,990
Currency Translation Adjustment	0	0
Goodwill, ending balance	$ 199,177	$ 207,065

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination.

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Amount of foreign currency translation gain (loss) which increases (decreases) an asset representing future economic benefits from other assets acquired in a business combination that are not individually identified and separately recognized.

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Amount of increase (decrease), classified as other, of an asset representing the future economic benefits from other assets acquired in a business combination that are not individually identified and separately recognized.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Amount of divestiture of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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