CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
CONSOLIDATED BALANCE SHEETS
Loans, allowance for loan losses (in dollars)	$ 38,541	$ 39,889
Preferred stock, Authorized shares	400,000	400,000
Preferred stock, Issued shares	35,970	57,000
Preferred stock, outstanding shares	35,970	57,000
Preferred stock, Aggregate liquidation preference (in dollars)	$ 35,970	$ 57,000
Common stock, stated value (in dollars per share)	$ 0.50	$ 0.50
Common stock, Authorized shares	100,000,000	100,000,000
Common stock, Issued shares	20,789,366	20,780,616
Common stock, Outstanding shares	20,214,964	20,206,214
Treasury stock, shares	574,402	574,402