Consolidated Balance Sheets (Parenthetical) (USD $)	0 Months Ended	12 Months Ended
	Sep. 30, 2009	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2011
Preferred stock, shares authorized		250,000	250,000
Preferred stock, shares issued	3,710
Common stock, par value		$ 2.50	$ 2.50
Common stock, shares authorized		20,000,000	20,000,000
Common stock, shares issued		8,301,746	7,451,022
Common stock, shares outstanding		8,301,746	7,451,022
Series 2009 Preferred Stock [Member]
Preferred stock, par value	$ 1.00	$ 1.00	$ 1.00
Preferred stock, shares issued		3,610	3,710
Preferred stock, dividend rate	8.00%	8.00%	8.00%
Series 2011 Preferred Stock [Member]
Preferred stock, par value		$ 1.00	$ 1.00	$ 1.00
Preferred stock, shares issued		11,914	11,938	12,000
Preferred stock, dividend rate		8.00%	8.00%	8.00%