Consolidated Balance Sheets (unaudited) (Parenthetical) - $ / shares	6 Months Ended		12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Common stock, par value (in dollars per share)	$ 2.50	$ 2.50	$ 2.50
Common stock, shares authorized	20,000,000	20,000,000	20,000,000
Common stock, shares issued	10,843,676	7,457,222	8,301,746
Common stock, shares outstanding	10,843,676	7,457,222	8,301,746
Preferred stock, shares authorized	0	250,000	250,000
Series 2009 Preferred Stock [Member]
Preferred stock, par value (in dollars per share)	$ 0	$ 1.00	$ 1.00
Preferred stock, shares issued	0	3,710	3,610
Preferred stock, dividend rate, percentage	0.00%	8.00%	8.00%
Series 2011 Preferred Stock [Member]
Preferred stock, par value (in dollars per share)	$ 0	$ 1.00	$ 1.00
Preferred stock, shares issued	0	11,914	11,914
Preferred stock, dividend rate, percentage	0.00%	8.00%	8.00%