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Acquisition (Details 1) (Alumicor Limited [Member], USD $) In Thousands, except Per Share data, unless otherwise specified | 3 Months Ended | 9 Months Ended
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Nov. 30, 2013 | Nov. 30, 2013
Alumicor Limited [Member] |  |
Business Acquisition [Line Items] |  |
Business Acquisition, Pro Forma Revenue | $ 210,613 us-gaap_BusinessAcquisitionsProFormaRevenue / us-gaap_BusinessAcquisitionAxis = apog_AlumicorLimitedMember | $ 595,451 us-gaap_BusinessAcquisitionsProFormaRevenue / us-gaap_BusinessAcquisitionAxis = apog_AlumicorLimitedMember
Business Acquisition, Pro Forma Net Income (Loss) | $ 10,595 us-gaap_BusinessAcquisitionsProFormaNetIncomeLoss / us-gaap_BusinessAcquisitionAxis = apog_AlumicorLimitedMember | $ 22,516 us-gaap_BusinessAcquisitionsProFormaNetIncomeLoss / us-gaap_BusinessAcquisitionAxis = apog_AlumicorLimitedMember
Business Acquisition, Pro Forma Earnings Per Share, Basic | $ 0.37 us-gaap_BusinessAcquisitionProFormaEarningsPerShareBasic / us-gaap_BusinessAcquisitionAxis = apog_AlumicorLimitedMember | $ 0.79 us-gaap_BusinessAcquisitionProFormaEarningsPerShareBasic / us-gaap_BusinessAcquisitionAxis = apog_AlumicorLimitedMember
Business Acquisition, Pro Forma Earnings Per Share, Diluted | $ 0.36 us-gaap_BusinessAcquisitionProFormaEarningsPerShareDiluted / us-gaap_BusinessAcquisitionAxis = apog_AlumicorLimitedMember | $ 0.77 us-gaap_BusinessAcquisitionProFormaEarningsPerShareDiluted / us-gaap_BusinessAcquisitionAxis = apog_AlumicorLimitedMember

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- Definition The pro forma basic net income per share for a period as if the business combination or combinations had been completed at the beginning of a period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(2)-(3) -URI http://asc.fasb.org/extlink&oid=25497992&loc=d3e1392-128463 + Details
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