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Commitments and Contingencies (Details) - USD ($) | 12 Months Ended
--- | ---
Feb. 28, 2017 | Feb. 29, 2016 | Feb. 28, 2015
Commitments and Contingencies Disclosure [Abstract] |  |  |
Minimum operating lease term | 1 year |  |
Rent expense | $ 17,010,000 | $ 13,871,000 | $ 14,070,895

X
- Definition Lessee Leasing Arrangments, Operating Leases, Term of Contract + References No definition available. + Details
Name: | azz_LesseeLeasingArrangmentsOperatingLeasesTermOfContract
Namespace Prefix: | azz_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_CommitmentsAndContingenciesDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of rent expense incurred for leased assets, including but not limited to, furniture and equipment, that is not directly or indirectly associated with the manufacture, sale or creation of a product or product line. + References No definition available. + Details
Name: | us-gaap_LeaseAndRentalExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration