Consolidated Statements Of Condition (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2012
Interest-bearing deposits with other banks, restricted for securitization investors	$ 0	$ 0	$ 529,418
Net loans - restricted for securitization investors	$ 0	$ 0	$ 156,132
Preferred stock, par value
Preferred stock, shares authorized	20,000,000	20,000,000	20,000,000
Common stock, par value
Common stock, stated value	$ 1.00	$ 1.00	$ 1.00
Common stock, shares authorized	100,000,000	100,000,000	60,000,000
Common stock, shares issued	37,272,279	37,107,684	36,521,562
Treasury stock, shares	258,572	249,329	232,182
Series A Preferred Stock [Member]
Preferred stock, liquidation value per share	$ 1,000	$ 1,000	$ 1,000
Preferred stock, shares issued	50,000	50,000	50,000
Preferred stock, shares outstanding	50,000	50,000	50,000
Series C Preferred Stock [Member]
Preferred stock, liquidation value per share	$ 1,000	$ 1,000	$ 1,000
Preferred stock, shares issued	126,500	126,500	126,500
Preferred stock, shares outstanding	126,500	126,500	126,500