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Proceeds received through the bankruptcy/administration process on the investment in Clinton Cards secured debt.

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Valuation adjustment associated with the expected realization of the residual investment in Clinton Cards secured debt.

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The gain (loss) resulting from the sale of a disposal group that is not a discontinued operation. It is included in income from continuing operations before income taxes in the income statement.

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This item represents the net total realized and unrealized gain (loss) included in earnings for the period as a result of selling or holding marketable securities categorized as trading, available-for-sale, or held-to-maturity, including the unrealized holding gain (loss) of held-to-maturity securities transferred to the trading security category and the cumulative unrealized gain (loss) which was included in other comprehensive income (a separate component of shareholders' equity) for available-for-sale securities transferred to trading securities during the period. Additionally, this item would include any gains (losses) realized during the period from the sale of investments accounted for under the cost method of accounting and losses recognized for other than temporary impairments (OTTI) of the subject investments.

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Amount of gain (loss) on sale or disposal of property, plant and equipment assets, including oil and gas property and timber property.

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The amount by which the fair value of an investment is less than the amortized cost basis or carrying amount of that investment at the balance sheet date and the decline in fair value is deemed to be other than temporary, before considering whether or not such amount is recognized in earnings or other comprehensive income.

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Amount of interest income earned from interest bearing assets not separately disclosed.

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The cash inflow from sale of buildings.

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Other Income and Expense - Additional Information (Detail) (USD $)	1 Months Ended	3 Months Ended		9 Months Ended		3 Months Ended		6 Months Ended
	Jul. 31, 2013	Nov. 28, 2014	Nov. 29, 2013	Nov. 28, 2014	Nov. 29, 2013	May 30, 2014	Aug. 29, 2014	Aug. 29, 2014
Other Income And Expense [Line Items]
Net gain on sale of the AGI In-Store business		$ (139,000)		$ 38,663,000
Proceeds from sale of AGI In-Store				73,659,000
Non-cash loss on disposal of fixed assets		90,000	672,000	15,823,000	559,000
Clinton Cards secured debt recovery			1,804,000	3,390,000	4,232,000
Distribution received				11,926,000am_ProceedsFromBankruptcyAdministration	4,982,000am_ProceedsFromBankruptcyAdministration
Interest income		2,517,000us-gaap_InterestIncomeOther	29,000us-gaap_InterestIncomeOther	2,658,000us-gaap_InterestIncomeOther	222,000us-gaap_InterestIncomeOther
Investment impairment charge			1,935,000us-gaap_ImpairmentOfInvestments		1,935,000us-gaap_ImpairmentOfInvestments
Gain related to Party City investment	3,300,000us-gaap_GainLossOnInvestments				3,262,000us-gaap_GainLossOnInvestments
Clinton Cards [Member]
Other Income And Expense [Line Items]
Clinton Cards secured debt recovery						3,400,000
Distribution received		11,300,000
Interest income		2,500,000
WHQ Location [Member]
Other Income And Expense [Line Items]
Non-cash loss on disposal of fixed assets				15,500,000			15,500,000
Cash received from sale of property				13,500,000			13,500,000
AGI In-Store [Member]
Other Income And Expense [Line Items]
Net gain on sale of the AGI In-Store business		(100,000)		38,700,000			38,800,000
Proceeds from sale of AGI In-Store				73,700,000				73,700,000
Clinton Cards [Member]
Other Income And Expense [Line Items]
Clinton Cards secured debt recovery			$ 1,800,000		$ 4,200,000