Restatement of Consolidated Financial Statements (USD $)
In Thousands, unless otherwise specified
Apr. 26, 2013
Apr. 27, 2012
Apr. 29, 2011
Apr. 30, 2010
Jan. 25, 2013
As Reported [Member]
Oct. 26, 2012
As Reported [Member]
Jul. 27, 2012
As Reported [Member]
Apr. 27, 2012
As Reported [Member]
Jan. 27, 2012
As Reported [Member]
Oct. 28, 2011
As Reported [Member]
Jul. 29, 2011
As Reported [Member]
Apr. 29, 2011
As Reported [Member]
Apr. 30, 2010
As Reported [Member]
Jan. 25, 2013
As Adjusted [Member]
Oct. 26, 2012
As Adjusted [Member]
Jul. 27, 2012
As Adjusted [Member]
Apr. 27, 2012
As Adjusted [Member]
Jan. 27, 2012
As Adjusted [Member]
Oct. 28, 2011
As Adjusted [Member]
Jul. 29, 2011
As Adjusted [Member]
Apr. 29, 2011
As Adjusted [Member]
Apr. 30, 2010
As Adjusted [Member]
Jan. 25, 2013
Adjustment [Member]
Oct. 26, 2012
Adjustment [Member]
Jul. 27, 2012
Adjustment [Member]
Apr. 27, 2012
Adjustment [Member]
Jan. 27, 2012
Adjustment [Member]
Oct. 28, 2011
Adjustment [Member]
Jul. 29, 2011
Adjustment [Member]
Apr. 29, 2011
Adjustment [Member]
Apr. 30, 2010
Adjustment [Member]
Deferred income taxes $ 41,873 $ 48,089     $ 90,784 $ 51,739 $ 51,739 $ 51,739 $ 56,777 $ 56,777 $ 56,777     $ 87,134 $ 48,089 $ 48,089 $ 48,089 $ 53,127 $ 53,127 $ 53,127     $ (3,650) $ (3,650) $ (3,650) $ (3,650) $ (3,650) $ (3,650) $ (3,650)    
Long-Term Debt 91,822 210,652           214,302                 210,652                 (3,650)          
Retained earnings 833,723 866,799     810,725 873,688 871,085 863,149 848,397 835,503 830,327 818,561 788,049 814,375 877,338 874,735 866,799 852,047 839,153 833,977 822,211 791,699 3,650 3,650 3,650 3,650 3,650 3,650 3,650 3,650 3,650
Total Stockholders Equity 581,131 660,236 667,760 641,807       656,586       664,110 638,157       660,236       667,760 641,807       3,650       3,650 3,650
Total Liabilities and Stockholders' Equity $ 1,013,837 $ 1,065,777