Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Securities held to maturity, fair value	$ 139,171	$ 137,087
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	10,000,000	10,000,000
Common stock, shares issued	6,651,760	6,651,760
Common stock, shares outstanding	6,327,226	6,318,708
Treasury stock, shares	324,534	333,052
Deferred Compensation Arrangements [Member]
Common stock, shares outstanding	308,670	319,854
Preferred Class A Non-Voting [Member]
Preferred stock, shares authorized	200,000	200,000
Preferred stock, shares outstanding	0	0
Preferred Class B Voting [Member]
Preferred stock, shares authorized	1,500,000	1,500,000
Preferred stock, shares outstanding	0	0