CONSOLIDATED CONDENSED BALANCE SHEETS (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Fair value of investment securities	$ 396,217	$ 442,469
Loans, allowance for loan losses	$ 69,493	$ 70,898
Common Stock, stated value	$ 0.125	$ 0.125
Common Stock, Authorized	50,000,000	50,000,000
Common Stock, shares Issued	28,672,177	28,559,707
Common Stock, shares outstanding	28,672,177	28,559,707
Preferred stock, Series B
Preferred Stock, no-par value	$ 0	$ 0
Preferred Stock, liquidation value	$ 1,000	$ 1,000
Preferred Stock, Authorized	500,000	500,000
Preferred Stock, Issued	90,783	90,783
Preferred Stock, outstanding	90,783	90,783
Cumulative Preferred Stock
Preferred Stock, par value	$ 1,000	$ 1,000
Preferred Stock, liquidation value	$ 1,000	$ 1,000
Preferred Stock, Authorized	600	600
Preferred Stock, Issued	125	125
Preferred Stock, outstanding	125	125