Consolidated Statements of Condition (Parenthetical) (USD $) In Thousands, except Share data	Jun. 30, 2011	Dec. 31, 2010	Jun. 30, 2010
Interest-bearing deposits with banks, restricted for securitization investors	$ 23,276	$ 36,620	$ 83,501
Net loans, restricted for securitization investors	$ 660,294	$ 646,268	$ 598,857
Preferred stock, no par value
Preferred stock, shares authorized	20,000,000	20,000,000	20,000,000
Common stock, no par value
Common stock, stated value	$ 1	$ 1	$ 1
Common stock, shares authorized	60,000,000	60,000,000	60,000,000
Common stock, shares issued	34,988,497	34,864,068	31,084,417
Treasury stock, shares	1,441	0	119
Series A Preferred Stock [Member]
Preferred stock, liquidation value	$ 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 B Preferred Stock [Member]
Preferred stock, liquidation value	$ 1,000	$ 1,000	$ 1,000
Preferred stock, shares issued	0	0	250,000
Preferred stock, shares outstanding	0	0	250,000