Consolidated Balance Sheets (Parenthetical) (USD $)	6 Months Ended		12 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2012
Preferred stock, par value	$ 1	$ 1	$ 1
Preferred stock, shares authorized	250,000	250,000	250,000
Preferred stock, shares issued	15,688	15,710	15,710
Common stock, par value	$ 2.5	$ 2.5	$ 2.5
Common stock, shares authorized	20,000,000	20,000,000	20,000,000
Common stock, shares issued	7,440,222	7,425,472	7,425,472
Series A Preferred Stock [Member]
Preferred stock, par value	$ 1	$ 1	$ 1
Preferred stock, shares issued	3,710	3,710	3,710
Preferred stock, dividend rate, percentage	8.00%	8.00%	8.00%
Series B Preferred Stock [Member]
Preferred stock, par value	$ 1	$ 1	$ 1
Preferred stock, shares issued	11,978	12,000	12,000
Preferred stock, dividend rate, percentage	8.00%	8.00%	8.00%