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Acquisitions (Narrative) (Details) (USD $)
9 Months Ended 3 Months Ended 9 Months Ended
Jul. 01, 2011
Jun. 10, 2011
May 26, 2011
Apr. 27, 2011
May 26, 2011
Maximum [Member]
AATI [Member]
May 26, 2011
Minimum [Member]
AATI [Member]
May 26, 2011
AATI [Member]
Jul. 01, 2011
SiGe [Member]
Jul. 01, 2011
SiGe [Member]
Jun. 10, 2011
SiGe [Member]
Percentage of interest acquired       100.00%           100.00%
Aggregated purchase price       $ 28,800,000           $ 279,500,000
Fair value of contingent consideration 59,400,000     2,000,000           57,400,000
Business combination, contingent consideration arrangements, range of outcomes, value, high                   65,000,000
Business combination, contingent consideration arrangements, range of outcomes, value, low                   0
Time period of achievement of milestones, in years                   1
Amount contributed to net income by acquired entity               6,500,000 6,500,000  
Goodwill   172,029,000                
Potential payment for pending acquisition in cash and stock, price per share             6.13      
Business acquisition immaterial impact on revenue

The acquisition has an immaterial impact to the Company's results of operations (i.e., contributed less than one percent of net revenue for the three and nine-months ended July 1, 2011)

                 
Expected cash to be received from pending acquisition         90,000,000 80,000,000        
Expected cash payment for pending acquisition         120,000,000 100,000,000        
Stock consideration right to receive, share amount             0.08725      
Time period used to calculate average sale price of common stock, number of days     30              
Measurement period of final cash consideration preceding the closing of the merger, number of days 5                  
Closing value of the stock consideration $ 2.45                  
Merger consideration right to receive, initial calculated amount without interest             $ 3.68      
Conditional last reported sale price during the pre-closing measurement period, price per share $ 21.00