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Accounts Receivable and Allowance for Doubtful Receivables - Allowance for Doubtful Receivables (Detail) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Feb. 28, 2015
Feb. 28, 2014
Feb. 28, 2013
Receivables [Abstract]      
Balance at beginning of period $ 3,672us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent $ 3,952us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent $ 4,403us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent
Bad debt expense 1,326us-gaap_ProvisionForDoubtfulAccounts 3,024us-gaap_ProvisionForDoubtfulAccounts 743us-gaap_ProvisionForDoubtfulAccounts
Recoveries 60us-gaap_AllowanceForDoubtfulAccountsReceivableRecoveries 42us-gaap_AllowanceForDoubtfulAccountsReceivableRecoveries 45us-gaap_AllowanceForDoubtfulAccountsReceivableRecoveries
Accounts written off (1,499)us-gaap_AllowanceForDoubtfulAccountsReceivableWriteOffs (3,346)us-gaap_AllowanceForDoubtfulAccountsReceivableWriteOffs (1,239)us-gaap_AllowanceForDoubtfulAccountsReceivableWriteOffs
Balance at end of period $ 3,559us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent $ 3,672us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent $ 3,952us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent