Consolidated Statements of Financial Condition (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Held-to-maturity securities, fair value (in dollars)	$ 2,035,378	$ 1,811,122
Preferred stock, par value (in dollars per share)	$ 1.00	$ 1.00
Preferred stock, shares authorized	5,000,000	5,000,000
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized	200,000,000	200,000,000
Common stock, shares issued	166,494,888	166,494,888
Common stock, shares outstanding	99,707,552	98,841,960
Treasury stock, shares	66,787,336	67,652,928
Series C Preferred Stock
Preferred stock, shares authorized	150,000	150,000
Preferred stock, shares issued	135,000	135,000
Preferred stock, shares outstanding	135,000	135,000