Condensed Financial Statements Of Parent Company Condensed Financial Statements of Parent Company (Narrative) (Details) - $ / shares	Mar. 12, 2015	Dec. 31, 2011	Sep. 30, 2009	Dec. 31, 2017	Dec. 31, 2016
Preferred stock, shares authorized				250,000	250,000
Preferred stock, par value				$ 1.00	$ 1.00
Common stock, par value				$ 2.50	$ 2.50
Common stock, shares authorized				20,000,000	20,000,000
Common stock, shares issued				12,465,296	10,883,509
Common stock, shares outstanding				12,358,562	10,736,970
Employee Stock Ownership Plan (ESOP), Number of Suspense Shares				106,734	146,539
Series 2009 Preferred Stock [Member]
Preferred stock, par value	$ 1.00		$ 1.00
Preferred stock, shares issued			3,710
Preferred stock, dividend rate	8.00%		8.00%
Series 2011 Preferred Stock [Member]
Preferred stock, par value	$ 1.00	$ 1.00
Preferred stock, shares issued		12,000
Preferred stock, dividend rate	8.00%	8.00%