Number Of Businesses Which Changed Revenue Recognition Practices Due To New Accounting Pronouncement

No definition available.

Name:	apog_NumberOfBusinessesWhichChangedRevenueRecognitionPracticesDueToNewAccountingPronouncement
Namespace Prefix:	apog_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Number Of Businesses Which Operate Under Long-Term, Fixed-Price Contracts

+ References

No definition available.

+ Details

Name:	apog_NumberOfBusinessesWhichOperateUnderLongTermFixedPriceContracts
Namespace Prefix:	apog_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Number Of Businesses Which Operate Under Long-Term, Fixed-Price Contracts, Percent Of Total Revenue

+ References

No definition available.

+ Details

Name:	apog_NumberOfBusinessesWhichOperateUnderLongTermFixedPriceContractsPercentOfTotalRevenue
Namespace Prefix:	apog_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Number Of Businesses Which Recognize Revenue Following The Over-Time Output Method

+ References

No definition available.

+ Details

Name:	apog_NumberOfBusinessesWhichRecognizeRevenueFollowingTheOverTimeOutputMethod
Namespace Prefix:	apog_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Number Of Businesses Which Recognize Revenue Following The Over-Time Output Method, Percent Of Total Revenue

+ References

No definition available.

+ Details

Name:	apog_NumberOfBusinessesWhichRecognizeRevenueFollowingTheOverTimeOutputMethodPercentOfTotalRevenue
Namespace Prefix:	apog_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage Of Total Revenue

+ References

No definition available.

+ Details

Name:	apog_PercentageOfTotalRevenue
Namespace Prefix:	apog_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Tax Cuts And Jobs Act Of 2017, Incomplete Accounting, Change In Tax Rate, Deferred Tax Asset, Provisional Income Tax Expense

+ References

No definition available.

+ Details

Name:	apog_TaxCutsAndJobsActOf2017IncompleteAccountingChangeInTaxRateDeferredTaxAssetProvisionalIncomeTaxExpense
Namespace Prefix:	apog_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The end date of the period reflected on the cover page if a periodic report. For all other reports and registration statements containing historical data, it is the date up through which that historical data is presented. If there is no historical data in the report, use the filing date. The format of the date is CCYY-MM-DD.

+ References

No definition available.

+ Details

Name:	dei_DocumentPeriodEndDate
Namespace Prefix:	dei_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_DisaggregationOfRevenueLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The cumulative amount of the reporting entity's undistributed earnings or deficit.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(23)(a)(4))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770

Reference 3: 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(30)(a)(3))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_RetainedEarningsAccumulatedDeficit
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Number of stock bought back by the entity at the exercise price or redemption price.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=84159872&loc=d3e21463-112644

+ Details

Name:	us-gaap_StockRedeemedOrCalledDuringPeriodShares
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Equity impact of the value of stock bought back by the entity at the exercise price or redemption price.

+ References

+ Details

Name:	us-gaap_StockRedeemedOrCalledDuringPeriodValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The number of shares authorized to be repurchased by an entity's Board of Directors under a stock repurchase plan.

+ References

No definition available.

+ Details

Name:	us-gaap_StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Details

Name:	us-gaap_TimingOfTransferOfGoodOrServiceAxis=us-gaap_TransferredAtPointInTimeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_InitialApplicationPeriodCumulativeEffectTransitionAxis=us-gaap_DifferenceBetweenRevenueGuidanceInEffectBeforeAndAfterTopic606Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_AdjustmentsForNewAccountingPronouncementsAxis=us-gaap_AccountingStandardsUpdate201409Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementEquityComponentsAxis=us-gaap_AccumulatedOtherComprehensiveIncomeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementEquityComponentsAxis=us-gaap_RetainedEarningsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_NewAccountingPronouncementEarlyAdoptionAxis=us-gaap_NewAccountingPronouncementEarlyAdoptionEffectMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_AdjustmentsForNewAccountingPronouncementsAxis=apog_AccountingStandardsUpdate201802Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ShareRepurchaseProgramAxis=apog_ShareRepurchaseProgramMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Summary of Significant Accounting Policies (Details 1) $ in Thousands	1 Months Ended	6 Months Ended
	Oct. 09, 2018 USD ($) shares	Sep. 01, 2018 USD ($) business shares	Sep. 02, 2017 USD ($) shares	Mar. 03, 2018 USD ($)
Disaggregation of Revenue [Line Items]
Document period end date		Sep. 01, 2018
Number of businesses which operate under long-term, fixed-price contracts \| business		3
Revenue from businesses which operate under long-term, fixed-price contracts (as a percent)		34.00%
Number of businesses which changed revenue recognition practices due to the adoption of the new guidance \| business		1
Number of businesses that recognize revenue following an over-time output method \| business		1
Revenue from businesses that recognize revenue following an over-time output method (as a percent)		20.00%
Increase to retained earnings		$ 402,619		$ 373,259
Share repurchases (in shares) \| shares			200,000
Recognized at the time products are shipped
Disaggregation of Revenue [Line Items]
Percentage of total revenue		46.00%
Difference between Revenue Guidance in Effect before and after Topic 606 \| Accounting Standards Update 2014-09
Disaggregation of Revenue [Line Items]
Increase to retained earnings				$ 3,000
AOCI
Disaggregation of Revenue [Line Items]
Reclassification of tax effects (see Note 1)		$ 737
Retained earnings
Disaggregation of Revenue [Line Items]
Reclassification of tax effects (see Note 1)		(737)
Share repurchases			$ 9,675
New Accounting Pronouncement, Early Adoption, Effect \| AOCI \| Accounting Standards Update 2018-02
Disaggregation of Revenue [Line Items]
Reclassification of tax effects (see Note 1)		(700)
New Accounting Pronouncement, Early Adoption, Effect \| Retained earnings \| Accounting Standards Update 2018-02
Disaggregation of Revenue [Line Items]
Reclassification of tax effects (see Note 1)		$ 700
Share Repurchase Program
Disaggregation of Revenue [Line Items]
Shares authorized for repurchase (in shares) \| shares		2,000,000
Subsequent Event \| Share Repurchase Program
Disaggregation of Revenue [Line Items]
Share repurchases (in shares) \| shares	200,000
Share repurchases	$ 8,300
Shares authorized for repurchase (in shares) \| shares	3,040,068