Condensed Financial Information of Parent Company Only (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Common Stock, par value	$ 1	$ 1
Common Stock, shares authorized	23,000,000	23,000,000	20,000,000
Common Stock, shares issued	18,523,733	18,461,992
Common Stock, shares outstanding	17,660,390	17,932,954
Treasury Stock, shares	863,343	529,038
Parent Company
Common Stock, par value	$ 1.00	$ 1.00
Common Stock, shares authorized	23,000,000	23,000,000
Common Stock, shares issued	18,523,733	18,461,992
Common Stock, shares outstanding	17,660,390	17,932,954
Treasury Stock, shares	863,343	529,038