Pension and Other Postretirement Benefits - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Aug. 27, 2016	Aug. 27, 2016	Nov. 28, 2015
Weighted-average assumptions used to determine benefit obligation:
Weighted-average discount rate, rounded amount		0.25%
Cash contributions	$ 100	$ 201
Qualified Pension Plans [Member]
Weighted-average assumptions used to determine benefit obligation:
Effect of plan amendment on net periodic benefit cost	445	445
Effect of plan amendment on net periodic benefit cost compared to prior approach		1,343
Nonqualified Pension Plans [Member]
Weighted-average assumptions used to determine benefit obligation:
Effect of plan amendment on net periodic benefit cost	58	58
Effect of plan amendment on net periodic benefit cost compared to prior approach		14
Other Noncurrent Assets [Member]
Weighted-average assumptions used to determine benefit obligation:
Restricted trust, included in Other noncurrent assets	$ 641	$ 641	$ 729