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Restructuring and Excess Facilities (Details Textual) (USD $)
3 Months Ended
Mar. 30, 2012
Apr. 01, 2011
Apr. 01, 2011
Facilities charge [Member]
Dec. 31, 2010
Selling, general and administrative expenses [Member]
Restructuring and Excess Facilities (Textual) [Abstract]        
Excess facilities expense       $ 3,000,000
Expected sublease income 32,311,000 33,564,000 500,000  
Additional Restructuring and Excess Facilities (Textual) [Abstract]        
Accrued excess facilities cost 2,200,000      
Accrued excess facilities cost current portion $ 1,700,000