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Earnings Per Share (Details 1)
Jul. 31, 2012
Oct. 31, 2011
Class A common stock [Member]
   
Summarization of the Company's Class A and Class B common and treasury shares    
Authorized Shares 128,000,000 128,000,000
Issued Shares 42,281,920 42,281,920
Outstanding Shares 25,212,598 24,972,029
Treasury Shares 17,069,322 17,309,891
Class B common stock [Member]
   
Summarization of the Company's Class A and Class B common and treasury shares    
Authorized Shares 69,120,000 69,120,000
Issued Shares 34,560,000 34,560,000
Outstanding Shares 22,119,966 22,120,966
Treasury Shares 12,440,034 12,439,034