CONSOLIDATED STATEMENTS OF FINANCIAL CONDITION (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
CONSOLIDATED STATEMENTS OF FINANCIAL CONDITION
Held-to-maturity securities, fair value (in dollars)	$ 1,725,090	$ 2,176,925
Preferred stock, par value (in dollars per share)	$ 1.00	$ 1.00
Preferred stock, shares authorized	5,000,000	5,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
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	98,419,318	98,537,715
Treasury stock, shares	68,075,570	67,957,173
Unallocated common stock held by ESOP, shares	967,013	2,042,367