CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
CONSOLIDATED BALANCE SHEETS
Loans, allowance for loan losses (in dollars)	$ 39,889	$ 42,605
Preferred stock, Authorized shares	400,000	400,000
Preferred stock, Issued shares	57,000	57,000
Preferred stock, outstanding shares	57,000	57,000
Preferred stock, Aggregate liquidation preference (in dollars)	$ 57,000	$ 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	20,780,616	20,710,764
Common stock, Outstanding shares	20,206,214	20,136,188
Treasury stock, shares	574,402	574,402