Consolidated Balance Sheet (Parentheticals) (USD $)	Sep. 30, 2013	Dec. 31, 2012
Cost of available for sale securities	$ 1,409,106,000	$ 1,472,565,000
Fair value of held to maturity securities	53,893,000	55,982,000
Common stock, par value (in dollars per share)	$ 1	$ 1
Common stock, shares authorized	25,000,000	25,000,000
Common stock, shares issued	16,952,561	16,827,835
Treasury stock shares	1,508	0
Preferred Stock [Member]
Preferred stock, par value (in dollars per share)	$ 1	$ 1
Preferred stock, shares authorized	20,604	20,604
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Series A Preferred Stock [Member]
Preferred stock, par value (in dollars per share)	$ 1	$ 1
Preferred stock, shares authorized	16,000	16,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Series C Preferred Stock [Member]
Preferred stock, par value (in dollars per share)	$ 1	$ 1
Preferred stock, shares authorized	81,698	81,698
Preferred stock, shares issued	81,698	81,698
Preferred stock, shares outstanding	81,698	81,698
Preferred stock, liquidation value	$ 81,700,000	$ 81,700,000