CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
CONSOLIDATED BALANCE SHEETS
Loans, allowance for loan losses (in dollars)	$ 35,246	$ 39,889
Preferred stock, Authorized shares	400,000	400,000
Preferred stock, Issued shares	34,150	57,000
Preferred stock, outstanding shares	34,150	57,000
Preferred stock, Aggregate liquidation preference (in dollars)	$ 34,150	$ 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	20,851,827	20,780,616
Common stock, Outstanding shares	20,297,325	20,206,214
Treasury stock, shares	554,502	574,402