Long-Term Debt (Narrative) (Details) (USD $)	12 Months Ended
	Nov. 29, 2014	Nov. 30, 2013	Nov. 22, 2013	Apr. 05, 2012	May 01, 2014
Line of Credit Facility [Line Items]
Long-term debt	411,563,000	$ 166,636,000
Letters of credit outstanding, amount	33,359,000	28,541,000
Term Loan [Member]
Line of Credit Facility [Line Items]
Long-term debt	395,000,000	100,000,000	100,000,000
Weighted average interest rate	1.05%
Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Long-term debt	0	50,000,000
Remaining borrowing capacity	133,988,000
Credit Facility 2012 [Member]
Line of Credit Facility [Line Items]
Line of credit, term	5 years
Maximum borrowing capacity				150,000,000
Credit Facility 2012 [Member] | Credit Facility - Swing Line [Member]
Line of Credit Facility [Line Items]
Maximum borrowing capacity				10,000,000
Credit Facility 2012 [Member] | Credit Facility - Accordion [Member]
Line of Credit Facility [Line Items]
Maximum borrowing capacity				100,000,000
Credit Facility 2012 [Member] | 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	16,012,000	16,012,000
Credit Facility 2014 [Member] | Term Loan [Member]
Line of Credit Facility [Line Items]
Maximum borrowing capacity					315,000,000
Bonds [Member]
Line of Credit Facility [Line Items]
Long-term debt	15,820,000	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
Debt instrument, maturity date	May 01, 2031
Bonds [Member] | South Dakota Economic Development Finance Authority [Member]
Line of Credit Facility [Line Items]
Long-term debt	8,410,000	$ 8,410,000
Debt instrument, maturity date	Feb. 01, 2016