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Income Taxes (Tables)
3 Months Ended
Feb. 28, 2015
Income Tax Disclosure [Abstract]  
Summary of income tax contingencies
The following is a reconciliation of the beginning and ending amounts of gross unrecognized tax benefits for uncertain tax positions, including positions which impact only the timing of tax benefits.

 
Three Months Ended
 
February 28,
2015
 
March 1,
2014
Unrecognized tax benefits at beginning of year
$
2,487

 
$
2,155

Additions for current period tax positions
175

 
79

Changes in interest and penalties
19

 
33

Unrecognized tax benefits at end of period
$
2,681

 
$
2,267