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Costs and Estimated Earnings On Uncompleted Contracts - Accumulated Costs Net Of Billings (Details) - USD ($) $ in Thousands | Feb. 28, 2018 | Feb. 28, 2017
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Contractors [Abstract] |  |
Costs incurred on uncompleted contracts | $ 115,030 | $ 127,839
Estimated earnings | 57,182 | 53,598
Total costs and estimated earnings | 172,212 | 181,437
Less billings to date | (151,894) | (151,792)
Total costs net of billings | $ 20,318 | $ 29,645

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- Definition Contract Receivable, Aggregate Billings + References No definition available. + Details
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- Definition Contract Receivable, Gross, Excluding Aggregate Billings + References No definition available. + Details
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Namespace Prefix: | azz_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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- Definition Contract Receivable, Gross, Excluding Aggregate Billings Costs Incurred + References No definition available. + Details
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Namespace Prefix: | azz_
Data Type: | xbrli:monetaryItemType
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- Definition Contract Receivable, Gross, Excluding Aggregate Billings, Estimated Profit + References No definition available. + Details
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Namespace Prefix: | azz_
Data Type: | xbrli:monetaryItemType
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- Definition Costs in Excess of Billings, Net + References No definition available. + Details
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Namespace Prefix: | azz_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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- References No definition available. + Details
Name: | us-gaap_ContractorsAbstract
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Balance Type: | na
Period Type: | duration