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CONSOLIDATED STATEMENTS OF FINANCIAL CONDITION (UNAUDITED) (Parentheticals) - USD ($)
$ in Thousands
Dec. 31, 2015
Sep. 30, 2015
Statement of Financial Position [Abstract]    
Goodwill $ 291,503 $ 291,503
Common stock, par value (in dollars per share) $ 1.00 $ 1.00
Common stock, shares authorized (in shares) 300,000,000 300,000,000
Common stock, shares issued (in shares) 134,100,924 133,695,803
Common stock, shares outstanding (in shares) 92,918,434 92,936,595
Treasury stock, shares (in shares) 41,182,490 40,759,708