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Long-Term Debt - Summary of Long-Term Debt (Detail) (USD $) In Thousands, unless otherwise specified | Nov. 30, 2014 | Feb. 28, 2014
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Line of Credit Facility [Line Items] |  |
Revolving credit facility | $ 101,500 us-gaap_LongTermDebtNoncurrent | $ 105,500 us-gaap_LongTermDebtNoncurrent
Revolving Credit Facility [Member] |  |
Line of Credit Facility [Line Items] |  |
Revolving credit facility | $ 101,500 us-gaap_LongTermDebtNoncurrent / us-gaap_CreditFacilityAxis = us-gaap_RevolvingCreditFacilityMember | $ 105,500 us-gaap_LongTermDebtNoncurrent / us-gaap_CreditFacilityAxis = us-gaap_RevolvingCreditFacilityMember

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- Details
Name: | us-gaap_LineOfCreditFacilityLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Carrying amount of long-term debt, net of unamortized discount or premium, excluding amounts to be repaid within one year or the normal operating cycle, if longer (current maturities). Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 + Details
Name: | us-gaap_LongTermDebtNoncurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Details
Name: | us-gaap_CreditFacilityAxis=us-gaap_RevolvingCreditFacilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |