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Contingent Liabilites and Commitments (Repurchase Commitments Narrative) (Details) - USD ($) $ in Thousands | 6 Months Ended |
--- | --- | ---
Feb. 25, 2017 | Aug. 27, 2016
Purchase Commitment, Excluding Long-term Commitment [Line Items] |  |
Repurchase agreement term | 18 months |
Accrued loss on repurchases | $ 1,522 | $ 881
Major Customers One and Two [Member] |  |
Purchase Commitment, Excluding Long-term Commitment [Line Items] |  |
Percent of revenue | 26.00% |
Obligation to Repurchase from Dealers [Member] |  |
Purchase Commitment, Excluding Long-term Commitment [Line Items] |  |
Contingent liability on repurchase agreements | $ 640,200 | 409,300
State Obligation to Repurchase [Member] |  |
Purchase Commitment, Excluding Long-term Commitment [Line Items] |  |
Contingent liability on repurchase agreements | $ 10,900 | $ 7,900

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