Basis of Presentation and Significant Accounting Policies (Details 1) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 01, 2012 segments	Dec. 03, 2011	Nov. 27, 2010
Schedule of Consolidated Financial Disclosures [Line Items]
Number of segments	3
Foreign Currency Transaction Gain (Loss), before Tax	$ (847)	$ 44	$ (709)
Restricted cash, noncurrent	1,839	1,590
Impairment of long-lived assets	0	87	276
Revenue Recognized Under Percentage of Completion Method	34,466	40,072	40,500
Research and Development Expense	11,811	10,989	9,817
Letters of Credit Outstanding, Amount	23,307
Components of Inventory [Abstract]
Raw materials	75,928	72,289
Work in process	34,996	30,957
Finished products	100,327	97,028
Inventories	$ 211,251	$ 200,274
Patents [Member] | Weighted Average [Member]
Schedule of Consolidated Financial Disclosures [Line Items]
Finite-Lived Intangible Assets, Useful Life	13 years
Other Acquired Intangibles [Member] | Minimum [Member]
Schedule of Consolidated Financial Disclosures [Line Items]
Finite-Lived Intangible Assets, Useful Life	2 years
Other Acquired Intangibles [Member] | Maximum [Member]
Schedule of Consolidated Financial Disclosures [Line Items]
Finite-Lived Intangible Assets, Useful Life	30 years
Building and Building Improvements [Member] | Minimum [Member]
Schedule of Consolidated Financial Disclosures [Line Items]
Property, Plant and Equipment, Useful Life	15 years
Building and Building Improvements [Member] | Maximum [Member]
Schedule of Consolidated Financial Disclosures [Line Items]
Property, Plant and Equipment, Useful Life	40 years
Machinery and Equipment [Member] | Minimum [Member]
Schedule of Consolidated Financial Disclosures [Line Items]
Property, Plant and Equipment, Useful Life	3 years
Machinery and Equipment [Member] | Maximum [Member]
Schedule of Consolidated Financial Disclosures [Line Items]
Property, Plant and Equipment, Useful Life	15 years