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Supplemental Disclosure of Cash Flow Information (Details Textual) (USD $)
 12 Months Ended
Mar. 31, 2012
Mar. 26, 2011
Mar. 27, 2010
Schedule of Trading Securities and Other Trading Assets [Line Items]      
Other comprehensive income in connection with interest rate swap contracts   $ 190,000 [1] $ 435,000 [1]
Supplemental Disclosure Of Cash Flow Information (Textual) [Abstract]      
Capital leases - property, plant and equipment 1,400,000 1,065,000 3,500,000
Capital leases - long-term debt 1,400,000 1,065,000 3,500,000
Other non current assets pension liability adjustment (3,033,000)   1,311,000
Other comprehensive income pension liability adjustment (1,977,000)   (813,000)
Long term deferred taxes pension liability adjustment (1,212,000)   (498,000)
Other long term liabilities pension liability adjustment 156,000    
Paid in capital in connection with accounting for income tax benefits related to the exercise of stock options (5,314,000) (3,538,000) (2,990,000)
Tax benefit from exercise of stock options 5,314,000 3,531,000 2,990,000
Long-term deferred taxes in connection with accounting for income tax benefits related to the exercise of stock options   7,000  
Current liabilities, exercise of stock options 5,485,000 1,120,000 792,000
Common stock issued exercise of stock options 6,000 1,000 1,000
Paid in capital exercise of stock options 8,685,000 606,000 2,343,000
Treasury stock exercise of stock options 14,176,000 1,727,000 3,136,000
Other current liabilities in connection with declaration of cash dividend     1,434,000
Retained earnings in connection with declaration of cash dividend     1,434,000
Interest rate swap [Member]
      
Schedule of Trading Securities and Other Trading Assets [Line Items]      
Other comprehensive income in connection with interest rate swap contracts     435,000
Other current liabilities in connection with interest rate swap contracts     307,000
Other long-term liabilities in connection with interest rate swap contracts     (1,008,000)
Long-term deferred taxes in connection with interest rate swap contracts     $ (266,000)
[1] The balance related to the derivatives contracts was $(190) at March 27, 2010.