Consolidated Statements Of Financial Condition (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
Consolidated Statements Of Financial Condition [Abstract]
Held to maturity, fair value	$ 1,940,444	$ 2,027,197
Junior subordinated debentures issued to capital trusts, fair value	$ 151,409	$ 160,478
Preferred stock, par value	$ 0	$ 0
Preferred stock, shares authorized	30,000,000	30,000,000
Preferred stock, shares issued	0	0
Common stock, par value	$ 0	$ 0
Common stock, shares authorized	232,023,233	232,023,233
Common stock, shares issued	197,073,878	178,717,806
Treasury stock, shares	4,768	34,776