CONSOLIDATED STATEMENTS OF FINANCIAL CONDITION (UNAUDITED) (Parentheticals) - USD ($) $ in Thousands	Mar. 31, 2016	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)	134,092,173	133,695,803
Common stock, shares outstanding (in shares)	91,270,241	92,936,595
Treasury stock, shares (in shares)	42,821,932	40,759,408