Consolidated Statements of Condition (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2012
Consolidated Statements of Condition [Abstract]
Securities held to maturity, fair value	$ 61,743	$ 50,980	$ 10,641
Loans, net allowance for loan losses	$ 17,486	$ 16,825	$ 14,538
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	6,032,730	6,027,968	6,012,015
Common Stock, Shares, Outstanding	5,970,130	5,965,368	5,949,415
Treasury Stock, Shares	62,600	62,600	62,600