Fair Value Measurements (Details) (USD $) In Thousands	Aug. 27, 2011
Assets
Marketable securities	$ 44,642
Derivative assets	1,776
Interest rate swaps	7,368
Liabilities [Abstract]
Derivative liabilities	963
Contingent consideration liability	1,919
Fair Value, Inputs, Level 1 [Member]
Assets
Marketable securities	44,642
Derivative assets	0
Interest rate swaps	0
Liabilities [Abstract]
Derivative liabilities	0
Contingent consideration liability	0
Fair Value, Inputs, Level 2 [Member]
Assets
Marketable securities	0
Derivative assets	1,776
Interest rate swaps	7,368
Liabilities [Abstract]
Derivative liabilities	963
Contingent consideration liability	0
Fair Value, Inputs, Level 3 [Member]
Assets
Marketable securities	0
Derivative assets
Interest rate swaps	0
Liabilities [Abstract]
Derivative liabilities	0
Contingent consideration liability	$ 1,919