Accounts Payable and Accrued Liabilities (Details 1) (USD $) In Thousands, unless otherwise specified	Dec. 01, 2012	Dec. 03, 2011
Accounts Payable and Accrued Liabilities [Line Items]
Accounts payable	$ 69,206	$ 64,701
Accrued salaries, wages and commissions	16,884	24,760
Pension and postretirement healthcare benefits liabilities	21,442	319
Compensated absences	9,010	8,530
Accrued insurance liabilities	7,733	9,017
Customer deposits	14,207	8,727
Other accrued liabilities	33,780	39,531
Accounts payable and accrued liabilities	172,262	155,585
Chief Executive Officer, Retired [Member]
Accounts Payable and Accrued Liabilities [Line Items]
Pension and postretirement healthcare benefits liabilities	$ 21,034