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Fair Value (Tables)
12 Months Ended
Sep. 28, 2012
Fair Value Disclosures [Abstract]  
Fair Value Of Assets and Liabilities Measured on a Recurring Basis
As of September 28, 2012, assets and liabilities recorded at fair value on a recurring basis consist of the following (in thousands):                         
 
 
 
Fair Value Measurements
 



Total
 
Quoted prices in active markets for identical assets
(Level 1)
 
Significant
other
observable inputs
(Level 2)
 
Significant unobservable inputs
(Level 3)
Assets
 
 
 
 
 
 
 
Money market
$
141,480

 
$
141,480

 
$

 
$

Auction rate securities
3,093

 

 

 
3,093

Total
$
144,573

 
$
141,480

 
$

 
$
3,093

Liabilities
 
 
 
 
 
 
 
Contingent consideration liability recorded for business combinations
$
1,046

 
$

 
$

 
$
1,046


Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation
The following table summarizes changes to the fair value of the ARS, which is a Level 3 asset (in thousands):
 
 
Auction rate securities
Balance at September 30, 2011
 
$
2,288

Acquisition related additions (see Notes 3 and 4 for further detail)
 
805

Balance at September 28, 2012
 
$
3,093

Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation
The following table summarizes changes to the fair value of the contingent consideration, which is a Level 3 liability (in thousands):
 
 
Contingent consideration
Balance at September 30, 2011
 
$
59,400

Changes in fair value
 
(5,414
)
Payments
 
(52,940
)
Balance at September 28, 2012
 
$
1,046