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Goodwill and Intangible Assets (Details 1) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2012
Mar. 26, 2011
Composition of other intangible assets    
Gross carrying amount $ 24,385 $ 20,596
Accumulated Amortization 9,213 7,090
Customer lists [Member]
   
Composition of other intangible assets    
Gross carrying amount 9,539 7,629
Accumulated Amortization 4,217 3,112
Trade names [Member]
   
Composition of other intangible assets    
Gross carrying amount 6,932 6,932
Accumulated Amortization 3,286 2,921
Favorable leases [Member]
   
Composition of other intangible assets    
Gross carrying amount 7,269 5,390
Accumulated Amortization 1,314 788
Other intangible assets [Member]
   
Composition of other intangible assets    
Gross carrying amount 645 645
Accumulated Amortization $ 396 $ 269