Consolidated Statements Of Condition (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011	Mar. 31, 2011	Mar. 31, 2012 Series A Preferred Stock [Member]	Dec. 31, 2011 Series A Preferred Stock [Member]	Mar. 31, 2011 Series A Preferred Stock [Member]	Mar. 31, 2012 Series C Preferred Stock [Member]	Dec. 31, 2011 Series C Preferred Stock [Member]	Mar. 31, 2011 Series C Preferred Stock [Member]
Interest-bearing deposits with other banks, restricted for securitization investors	$ 529,418	$ 272,592	$ 35,630
Net loans - restricted for securitization investors	$ 156,132	$ 411,532	$ 647,793
Preferred stock, par value	$ 0	$ 0	$ 0
Preferred stock, shares authorized	20,000,000	20,000,000	20,000,000
Preferred stock, liquidation value per share				$ 1,000	$ 1,000	$ 1,000	$ 1,000	$ 1,000	$ 1,000
Preferred stock, shares issued				50,000	50,000	50,000	126,500	0	0
Preferred stock, shares outstanding				50,000	50,000	50,000	126,500	0	0
Common stock, par value	$ 0	$ 0	$ 0
Common stock, stated value	$ 1	$ 1	$ 1
Common stock, shares authorized	60,000,000	60,000,000	60,000,000
Common stock, shares issued	36,521,562	35,981,950	34,947,251
Treasury stock, shares	232,182	3,601	1,069