Consolidated Statements of Condition (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014	Jun. 30, 2014
Statement of Financial Position [Abstract]
Securities held to maturity, fair value	$ 75,665	$ 73,057	$ 76,916
Allowance for loan losses	$ 14,865	$ 15,172	$ 15,763
Preferred Stock, Par value	$ 2.50	$ 2.50	$ 2.50
Preferred Stock, Shares authorized	20,000,000	20,000,000	20,000,000
Preferred Stock, Shares outstanding	0	0	0
Common Stock, Par value	$ 2.50	$ 2.50	$ 2.50
Common Stock, Shares authorized	20,000,000	20,000,000	20,000,000
Common Stock, Shares issued	6,092,708	6,078,250	6,067,946
Common Stock, Shares outstanding	6,030,108	6,015,650	6,005,346
Treasury Stock, Shares	62,600	62,600	62,600