Contingent Liabilites and Commitments (Repurchase Commitments Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended
	Nov. 26, 2016	Aug. 27, 2016
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Repurchase agreement term	18 months
Accrued loss on repurchases	$ 1,340	$ 881
Major Customers One and Two [Member]
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Percent of revenue	28.00%
Obligation to Repurchase from Dealers [Member]
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Contingent liability on repurchase agreements	$ 553,100	409,300
State Obligation to Repurchase [Member]
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Contingent liability on repurchase agreements	$ 9,000	$ 7,900