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Summary Of Significant Accounting Policies (Tables)
 12 Months Ended
Dec. 30, 2012
Accounting Policies [Abstract]  
Schedule of Movement of Warranty Reserves
The following table sets forth the movement in the warranty reserve which is located in the Other Accrued Expenses section of our Consolidated Balance Sheet:
(amounts in thousands)
December 30, 2012

 
December 25, 2011

Balance at beginning of year
$
5,857

 
$
6,170

Accruals for warranties issued
5,205

 
5,882

Settlements made
(5,429
)
 
(6,194
)
Adjustment for discontinued operations
(1,668
)
 
—

Foreign currency translation adjustment
30

 
(1
)
Balance at end of period
$
3,995

 
$
5,857
Assumptions and Weighted Average Fair Values of Share-Based Payment Units Under Black-Scholes Option Pricing Model
The fair value of share-based payment units was estimated using the Black-Scholes option pricing model with the following assumptions and weighted average fair values as follows:
Year Ended
December 30, 2012

 
December 25, 2011

 
December 26, 2010

Weighted-average fair value of grants
$
4.38

 
$
9.74

 
$
7.51

Valuation assumptions:
 

 
 

 
 

Expected dividend yield
0.00
%
 
0.00
%
 
0.00
%
Expected volatility
.5208

 
.4991

 
.4829

Expected life (in years)
5.06

 
4.98

 
4.93

Risk-free interest rate
0.750
%
 
2.138
%
 
1.845
%