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Goodwill and Acquisition-Related Intangibles (Details 1) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Dec. 31, 2011
Jan. 01, 2011
Dec. 31, 2011
Jan. 01, 2011
Schedule of expected annual amortization expense for acquisition-related intangibles        
2012 (remaining three months)     $ 1,982  
2013     8,536  
2014     7,918  
2015     7,289  
2016     6,742  
Thereafter     5,847  
Total     38,314  
Goodwill and Acquisition-Related Intangibles (Textual) [Abstract]        
Amortization of acquisition-related intangibles $ 1,982 $ 0 $ 5,587 $ 0