Goodwill and Intangible Assets - Schedule of Goodwill (Details) $ in Thousands	6 Months Ended
Aug. 31, 2020 USD ($)
Goodwill [Roll Forward]
Balance as of February 29, 2020	$ 356,225
Allocated to Galvabar	(1,132)
Allocated to disposal group	(3,955)
Foreign currency translation adjustment	617
Balance as of August 31, 2020	351,755
Metal Coatings \| Operating Segments
Goodwill [Roll Forward]
Balance as of February 29, 2020	157,048
Allocated to Galvabar	(1,132)
Allocated to disposal group	0
Foreign currency translation adjustment	617
Balance as of August 31, 2020	156,533
Infrastructure Solutions \| Operating Segments
Goodwill [Roll Forward]
Balance as of February 29, 2020	199,177
Allocated to Galvabar	0
Allocated to disposal group	(3,955)
Foreign currency translation adjustment	0
Balance as of August 31, 2020	$ 195,222

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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