CONSOLIDATED CONDENSED BALANCE SHEETS (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Investment securities held to maturity - fair value	$ 331,765	$ 378,174
Loans - allowance for loan losses	$ 68,202	$ 69,366
Common Stock, stated value (in dollars per share)	$ 0.125	$ 0.125
Common Stock, Authorized (in shares)	50,000,000	50,000,000
Common Stock, Issued (in shares)	28,801,848	28,692,616
Common Stock, Outstanding (in shares)	28,801,848	28,692,616
Series B Preferred Stock
Preferred Stock, liquidation value per share (in dollars per share)	$ 1,000	$ 1,000
Preferred Stock, Authorized (in shares)	500,000	500,000
Preferred Stock, Issued (in shares)	68,087	90,783
Preferred Stock, Outstanding (in shares)	68,087	90,783
Cumulative Preferred Stock
Preferred Stock, par value (in dollars per share)	$ 1,000	$ 1,000
Preferred Stock, liquidation value per share (in dollars per share)	$ 1,000	$ 1,000
Preferred Stock, Authorized (in shares)	600	600
Preferred Stock, Issued (in shares)	125	125
Preferred Stock, Outstanding (in shares)	125	125