Contingent Liabilites and Commitments (Repurchase Commitments Narrative) (Details) - USD ($)	9 Months Ended
	May. 30, 2015	Aug. 30, 2014
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Repurchase agreement term	18 months
Accrued loss on repurchases	$ 1,749,000	$ 2,212,000
Hypothetical percent change of repurchase assumptions	10.00%
Hypothetical change on repurchase assumptions	$ 296,000
Obligation to Repurchase from Dealers [Member]
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Contingent liability on repurchase agreements	417,700,000	363,800,000
State Obligation to Repurchase [Member]
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Contingent liability on repurchase agreements	$ 7,000,000	$ 6,800,000
Major Customers One and Two [Member]
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Percent of revenue	35.00%