Long-Term Debt (Narrative) (Details) - USD ($)	12 Months Ended
	Nov. 28, 2015	Nov. 29, 2014	Nov. 22, 2013	Apr. 05, 2012
Line of Credit Facility [Line Items]
Line of credit, term	5 years
Long-term debt	$ 405,156,000	$ 411,563,000
Letters of credit outstanding, amount	24,581,000	33,359,000
Letter of Credit Sub-Facility [Member]
Line of Credit Facility [Line Items]
Sub-facility letters of credit maximum capacity	50,000,000
Letters of credit outstanding, amount	7,521,000	16,012,000
Term Loan [Member]
Line of Credit Facility [Line Items]
Long-term debt	$ 200,000,000	395,000,000	$ 200,000,000
Weighted average interest rate	1.44%
Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Current borrowing capacity				$ 700,000,000
Maximum borrowing capacity				500,000,000
Long-term debt	$ 197,000,000	0
Additional borrowing capacity				100,000,000
Remaining borrowing capacity	295,479,000
Sub-facility letters of credit maximum capacity				$ 50,000,000
Bonds [Member]
Line of Credit Facility [Line Items]
Long-term debt	7,410,000	15,820,000
Bonds [Member] | Campbellsville-Taylor County Industrial Development Authority (Kentucky) [Member]
Line of Credit Facility [Line Items]
Long-term debt	7,410,000	7,410,000
Bonds [Member] | South Dakota Economic Development Finance Authority [Member]
Line of Credit Facility [Line Items]
Long-term debt	$ 0	$ 8,410,000