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Summary of Significant Accounting Policies - Debt (Details) (Senior Notes [Member], USD $)
Feb. 28, 2015
Feb. 28, 2014
Jan. 21, 2011
Unsecured Senior Notes Due March 31, 2018 [Member]
      
Debt Instrument [Line Items]      
Fair value of notes $ 164,418,000us-gaap_NotesPayableFairValueDisclosure
/ us-gaap_DebtInstrumentAxis
= azz_UnsecuredSeniorNotesDueMarch312018Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember		 $ 179,377,000us-gaap_NotesPayableFairValueDisclosure
/ us-gaap_DebtInstrumentAxis
= azz_UnsecuredSeniorNotesDueMarch312018Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember		  
Debt Instrument, Annual Principal Payment 14,300,000us-gaap_DebtInstrumentAnnualPrincipalPayment
/ us-gaap_DebtInstrumentAxis
= azz_UnsecuredSeniorNotesDueMarch312018Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember		    
Debt instrument, face amount 100,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= azz_UnsecuredSeniorNotesDueMarch312018Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember		    
Unsecured Senior Notes Due January 2021 [Member]
      
Debt Instrument [Line Items]      
Debt instrument, face amount     $ 125,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= azz_UnsecuredSeniorNotesDueJanuary2021Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember