Condensed Consolidated Statements of Financial Condition (Parenthetical) (Unaudited) (USD $)	Jun. 30, 2012	Dec. 31, 2011
Condensed Consolidated Statements of Financial Condition [Abstract]
Preferred stock, par value	$ 1	$ 1
Preferred stock, shares authorized	3,000,000	3,000,000
Preferred stock, shares issued
Common stock, par value	$ 1	$ 1
Common stock, shares authorized	200,000,000	200,000,000
Common stock, shares issued	105,563,455	105,563,455
Common stock, shares outstanding	104,728,846	104,916,994
Treasury stock, shares	834,609	646,461