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Acquisitions And Dispositions (Clinton Cards Acquisition) - Purchase Price Allocation (Detail) (USD $)
12 Months Ended
Feb. 28, 2013
Business Acquisition [Line Items]  
Cash acquired $ (621,000)us-gaap_CashAcquiredFromAcquisition
Clinton Cards [Member]  
Business Acquisition [Line Items]  
Credit bid 37,200,000us-gaap_BusinessCombinationConsiderationTransferredOther1
/ us-gaap_BusinessAcquisitionAxis
= am_ClintonCardsMember
Effective settlement of pre-existing relationships with the legacy Clinton Cards business 6,400,000am_BusinessCombinationPurchaseConsiderationFromSettlementOfPreExistingRelationshipBetweenAcquirerAndAcquiree
/ us-gaap_BusinessAcquisitionAxis
= am_ClintonCardsMember
Cash acquired (600,000)us-gaap_CashAcquiredFromAcquisition
/ us-gaap_BusinessAcquisitionAxis
= am_ClintonCardsMember
Total purchase price 43,000,000us-gaap_BusinessCombinationConsiderationTransferred1
/ us-gaap_BusinessAcquisitionAxis
= am_ClintonCardsMember
Inventory 5,500,000us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory
/ us-gaap_BusinessAcquisitionAxis
= am_ClintonCardsMember
Property, plant and equipment 18,400,000us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment
/ us-gaap_BusinessAcquisitionAxis
= am_ClintonCardsMember
Indefinite-lived intangible assets 22,500,000us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIndefiniteLivedIntangibleAssets
/ us-gaap_BusinessAcquisitionAxis
= am_ClintonCardsMember
Current liabilities assumed (3,400,000)us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilities
/ us-gaap_BusinessAcquisitionAxis
= am_ClintonCardsMember
Total allocation $ 43,000,000us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet
/ us-gaap_BusinessAcquisitionAxis
= am_ClintonCardsMember