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Basis of Presentation and Significant Accounting Policies (Tables)
 12 Months Ended
Dec. 01, 2012
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Schedule of Inventory, Current [Table Text Block]
Inventories are summarized as follows:

 
2012
 
2011
Raw materials
$
75,928

 
$
72,289

Work in process
34,996

 
30,957

Finished products
100,327

 
97,028

 
$
211,251

 
$
200,274
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]
The components of the ending balances of Accumulated other comprehensive loss are as follows:

 
2012
 
2011
 
2010
Pension liability, net of tax
$
(50,890
)
 
$
(44,656
)
 
$
(37,042
)
Translation adjustments, net of tax
(818
)
 
265

 
2,001

Accumulated other comprehensive loss
$
(51,708
)
 
$
(44,391
)
 
$
(35,041
)