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Supplemental Disclosure of Cash Flow Information (Details) (USD $)
 9 Months Ended
Dec. 24, 2011
Dec. 25, 2010
Supplemental Cash Flow [Line Items]    
Accounting for income tax benefits related to the exercise of stock options $ 4,999,000 $ 3,837,000
Property, plant and equipment, purchase price adjustment 1,331,000  
Deferred income tax asset, purchase price adjustment 381,000  
Goodwill, purchase price adjustment 325,000  
Intangible assets, purchase price adjustment 297,000  
Long-term debt, purchase price adjustment 2,334,000  
Current liabilities, exercise of stock options 5,485,000 1,120,000
Common Stock, exercise of stock options 6,000 1,000
Paid in capital, exercise of stock options 8,685,000 606,000
Treasury Stock, exercise of stock options 14,176,000 1,727,000
Capital Leases-property, plant and equipment 1,400,000 1,065,000
Capital Leases - Long-term debt 1,400,000 1,065,000
Fiscal Year 2012 Acquisitions [Member]
    
Supplemental Cash Flow [Line Items]    
Fair value of assets acquired 7,799,000  
Goodwill acquired 31,895,000  
Cash paid, net of cash acquired 37,843,000  
Liabilities assumed 1,851,000  
Fiscal Year 2011 Acquisitions [Member]
    
Supplemental Cash Flow [Line Items]    
Fair value of assets acquired   2,354,000
Goodwill acquired   8,400,000
Cash paid, net of cash acquired   10,232,000
Liabilities assumed   $ 522,000