CONSOLIDATED CONDENSED BALANCE SHEETS (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Fair value of investment securities	$ 351,439	$ 378,174
Loans, allowance for loan losses	$ 68,537	$ 69,366
Common Stock, stated value	$ 0.125	$ 0.125
Common Stock, Authorized	50,000,000	50,000,000
Common Stock, shares Issued	28,780,609	28,692,616
Common Stock, shares outstanding	28,780,609	28,692,616
Series B Preferred Stock
Preferred Stock, liquidation value	$ 1,000	$ 1,000
Preferred Stock, Authorized	500,000	500,000
Preferred Stock, Issued	68,087	90,783
Preferred Stock, outstanding	68,087	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