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Consolidated Statements of Changes in Stockholders' Equity (USD $)
Total
Paid-in Capital in Excess of Par Value
Retained Earnings
Class A Common Stock
Class B Common Stock
Balance at Sep. 26, 2009 $ 394,301,743 $ 118,184,132 $ 274,891,998 $ 644,430 $ 581,183
Balance, shares at Sep. 26, 2009       12,888,608 11,623,651
Net income 30,842,189 0 30,842,189 0 0
Cash dividends (15,469,943) 0 (15,469,943)   0
Common stock conversions 0     42 (42)
Common stock conversions, shares       825 (825)
Stock repurchases, at cost (593,200) (591,200) 0 0 (2,000)
Stock repurchases, at cost, shares       0 (40,000)
Balance at Sep. 25, 2010 409,080,789 117,592,932 290,264,244 644,472 579,141
Balance, shares at Sep. 25, 2010       12,889,433 11,582,826
Net income 39,059,510 0 39,059,510 0 0
Cash dividends (15,444,465) 0 (15,444,465)   0
Common stock conversions 0     2,505 (2,505)
Common stock conversions, shares       50,100 (50,100)
Stock repurchases, at cost (750,240) (748,090) 0 0 (2,150)
Stock repurchases, at cost, shares         (43,000)
Balance at Sep. 24, 2011 431,945,594 116,844,842 313,879,289 646,977 574,486
Balance, shares at Sep. 24, 2011       12,939,533 11,489,726
Net income 43,444,343 0 43,444,343 0 0
Cash dividends (15,359,401) 0 (15,359,401) 0 0
Common stock conversions 0     1,479 (1,479)
Common stock conversions, shares       29,575 (29,575)
Stock repurchases, at cost (2,617,067) (2,608,593) 0 (774) (7,700)
Stock repurchases, at cost, shares       (15,473) (154,010)
Balance at Sep. 29, 2012 $ 457,413,469 $ 114,236,249 $ 341,964,231 $ 647,682 $ 565,307
Balance, shares at Sep. 29, 2012       12,953,635 11,306,141