Income Taxes (Deferred Tax Assets and Liabilities) (Details) - USD ($) $ in Thousands	Dec. 03, 2016	Nov. 28, 2015	Nov. 29, 2014
Deferred tax assets:
Deferred compensation	$ 8,335	$ 11,294	$ 9,074
Loss carryforward and tax credit items	22,834	30,507	19,620
Accounts receivable	6,245	7,842	6,538
Inventories	6,397	6,390	5,484
Pensions	11,604	9,619	10,019
Accrued liabilities and other	6,665	7,427	6,999
Valuation allowance	(10,497)	(10,855)	(1,268)
Total deferred tax assets, net	51,583	62,224	56,466
Deferred tax liabilities:
Percentage of completion	(524)	(1,866)	(740)
Plant assets	(28,845)	(22,615)	(24,818)
Goodwill and acquired intangible assets	(93,907)	(98,713)	(97,179)
Other deferred tax liabilities	(297)	(287)	(230)
Total deferred tax liabilities	(123,573)	(123,481)	(122,967)
Deferred tax liability, net	$ (71,990)	$ (61,257)	$ (66,501)