Investment Securities (Details 3) (USD $)	Sep. 30, 2012	Dec. 31, 2011
Recorded book value, fair value and approximate yield of investment securities, by contractual maturity
Within One Year, Amortized Cost	$ 569,000
After One But Within Five Years, Amortized Cost	9,700,000
After Five But Within Ten Years, Amortized Cost	48,901,000
After Ten Years, Amortized Cost	28,268,000
Amortized Cost, Total	87,438,000
Available-for-sale securities, Amortized Cost	160,083,000	145,779,000
Within One Year, Fair Value	576,000
After One But Within Five Years, Fair Value	9,866,000
After Five But Within Ten Years, Fair Value	50,223,000
After Ten Years, Fair Value	30,943,000
Fair Value, Total	91,608,000
Available-for-sale (at fair value)	166,464,449	150,960,955
Available-for-sale securities, Yield	3.39%	3.68%
U.S. Government corporations and agencies [Member]
Recorded book value, fair value and approximate yield of investment securities, by contractual maturity
Within One Year, Amortized Cost	9,000	11,000
After One But Within Five Years, Amortized Cost	7,500,000	11,500,000
After Five But Within Ten Years, Amortized Cost	34,592,000	24,500,000
After Ten Years, Amortized Cost	3,000	3,000
Amortized Cost, Total	42,104,000	36,014,000
Available-for-sale securities, Amortized Cost	42,104,000	36,014,000
Within One Year, Fair Value	9,000	11,000
After One But Within Five Years, Fair Value	7,536,000	11,558,000
After Five But Within Ten Years, Fair Value	34,799,000	24,644,000
After Ten Years, Fair Value	3,000	3,000
Fair Value, Total	42,347,000	36,216,000
Available-for-sale (at fair value)	42,347,000	36,216,000
Within One Year, Yield	0.01%	0.80%
After One But Within Five Years, Yield	1.63%	1.68%
After Five But Within Ten Years, Yield	1.92%	2.36%
After Ten Years, Yield	0.87%	0.86%
Yield, total	1.87%	2.14%
Obligations of States and Political Subdivisions [Member]
Recorded book value, fair value and approximate yield of investment securities, by contractual maturity
Within One Year, Amortized Cost	560,000	1,145,000
After One But Within Five Years, Amortized Cost	2,200,000	1,834,000
After Five But Within Ten Years, Amortized Cost	14,309,000	11,395,000
After Ten Years, Amortized Cost	28,265,000	27,780,000
Amortized Cost, Total	45,334,000	42,154,000
Available-for-sale securities, Amortized Cost	45,334,000	42,154,000
Within One Year, Fair Value	567,000	1,151,000
After One But Within Five Years, Fair Value	2,330,000	1,913,000
After Five But Within Ten Years, Fair Value	15,424,000	12,285,000
After Ten Years, Fair Value	30,940,000	29,955,000
Fair Value, Total	49,261,000	45,304,000
Available-for-sale (at fair value)	49,261,000	45,304,000
Within One Year, Yield	5.54%	5.48%
After One But Within Five Years, Yield	5.85%	5.54%
After Five But Within Ten Years, Yield	5.62%	5.66%
After Ten Years, Yield	5.86%	6.07%
Yield, total	5.78%	5.92%
Mortgage-Backed Securities [Member]
Recorded book value, fair value and approximate yield of investment securities, by contractual maturity
Available-for-sale securities, Amortized Cost	72,459,000	67,402,000
Available-for-sale (at fair value)	74,643,000	69,215,000
Available-for-sale securities, Yield	2.68%	3.03%
Equity Securities [Member]
Recorded book value, fair value and approximate yield of investment securities, by contractual maturity
Available-for-sale securities, Amortized Cost	186,000	209,000
Available-for-sale (at fair value)	$ 213,000	$ 226,000
Available-for-sale securities, Yield	2.12%	2.25%