Inventories (Narrative) (Details) (USD $)	12 Months Ended
	Aug. 25, 2012	Aug. 27, 2011	Aug. 28, 2010
Inventory Disclosure [Abstract]
Inventory, gross	$ 118,118,000	$ 100,802,000
LIFO inventory amount	110,100,000	94,300,000
FIFO Towables inventory amount	8,000,000	6,500,000
Reduction to LIFO reserves	$ (613,000)	$ 2,075,000	$ (783,000)