Consolidated Statements of Condition (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2012
Statement of Financial Position [Abstract]
Securities held to maturity, fair value	$ 94,667	$ 50,980	$ 48,971
Allowance for loan losses	$ 16,797	$ 16,825	$ 15,993
Preferred Stock, Par value	$ 2.5	$ 2.5	$ 2.5
Preferred Stock, Shares authorized	20,000,000	20,000,000	20,000,000
Preferred Stock, Shares outstanding	0	0	0
Common Stock, Par value	$ 2.5	$ 2.5	$ 2.5
Common Stock, Shares authorized	20,000,000	20,000,000	20,000,000
Common Stock, Shares issued	6,049,261	6,027,968	6,023,320
Common Stock, Shares outstanding	5,986,661	5,965,368	5,960,720
Treasury Stock, Shares	62,600	62,600	62,600