Investment Securities (Details) (USD $)	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Dec. 31, 2011
Available-for-sale Securities [Abstract]
Amortized Cost	$ 326,723,000		$ 355,496,000
Gross Unrealized Gains	14,449,000		11,752,000
Gross Unrealized Losses	2,000		7,000
Securities available-for-sale	341,170,000		367,241,000
Held-to-maturity [Abstract]
Amortized Cost	117,628,000		100,472,000
Gross Unrealized Gains	4,345,000		659,000
Gross Unrealized Losses	4,000		0
Fair Value	121,969,000		101,131,000
Number of Private-label Collateralized Mortgage Obligations	3
Combined Balance of Private-label Collateralized Mortgage Obligations	109,000
Available-for-sale [Abstract]
Due in One Year or Less	41,178,000
Due after one year through five years	39,462,000
Due after five years through ten years	24,117,000
Due after ten years	4,761,000
Asset-backed securities	12,294,000
Mortgage-backed securities and collateralized mortgage obligations: Residential, Available for Sale, Amortized Cost	176,210,000
Mortgage-backed securities and collateralized mortgage obligations: Commercial, Available for Sale, Amortized Cost	28,701,000
Available-for-sale securities, amortized Cost	326,723,000
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]
Due in one year or less	41,389,000
Due after one year through five years	41,758,000
Due after five years through ten years	26,267,000
Due after ten years	5,016,000
Asset-backed securities	12,546,000
Mortgage-backed securities and collateralized mortgage obligations: Residential, Available for Sale, Fair Value	184,174,000
Mortgage-backed securities and collateralized mortgage obligations: Commercial, Available for Sale, Fair Value	30,020,000
Securities available-for-sale	341,170,000		367,241,000
Held-to-maturity Securities, Debt Maturities, Amortized Cost [Abstract]
Due in One Year or Less	200,000
Due after One through Five Years	608,000
Due after five years through ten years	1,510,000
Mortgage-backed securities and collateralized mortgage obligations: Residential, Available for Sale, Amortized Cost	97,856,000
Mortgage-backed securities and collateralized mortgage obligations: Commercial, Available for Sale, Amortized Cost	17,454,000
Held-to-maturity securities, Amortized Cost	117,628,000
Held-to-maturity Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]
Due in One Year or Less	201,000
Due after One Year through Five	611,000
Due after five years through ten years	1,516,000
Mortgage-backed securities and collateralized mortgage obligations: Residential, Available for Sale	101,528,000
Mortgage-backed securities and collateralized mortgage obligations: Commercial, Available for Sale	18,113,000
Held-to-maturity securities, Fair Value	121,969,000
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Securities with Losses Under 12 Months, fair value			8,053,000
Securities with Losses under 12 Months, gross unrealized loss			3,000
Securities with Losses over 12 Months, fair value			136,000
Securities with Losses over 12 Months, gross unrealized loss			4,000
Total securities, fair value			8,189,000
Total securities, gross unrealized loss			7,000
Held-to-maturity Securities, Continuous Unrealized Loss Position [Abstract]
Number of impairment related to credit quality	0
Number of impaired securities evaluated as other temporary	0
Number of Available-for-sale Securities Sold	6	5
Number of Available-for-sale Securities sold with gains	5	4
Available-for-sale Securities, Net Gain	204,000
Available-for-sale Securities, Gross Realized Gains	235,000	94,000
Number of Available-for-sale Securities sold with loss	1	1
Available-for-sale Securities, Gross Realized Losses	31,000	4,000
Number of Held-to-maturity securities sold		1
Held to maturity security, Net gain on sale		9,000
Carrying value of securities pledged to secure public funds on deposits	152,300,000		154,100,000
U.S. Government Sponsored Enterprises [Member]
Available-for-sale Securities [Abstract]
Amortized Cost	31,217,000		94,339,000
Gross Unrealized Gains	94,000		662,000
Gross Unrealized Losses	0		2,000
Securities available-for-sale	31,311,000		94,999,000
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]
Securities available-for-sale	31,311,000		94,999,000
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Securities with Losses Under 12 Months, fair value			6,204,000
Securities with Losses under 12 Months, gross unrealized loss			2,000
Securities with Losses over 12 Months, fair value			0
Securities with Losses over 12 Months, gross unrealized loss			0
Total securities, fair value			6,204,000
Total securities, gross unrealized loss			2,000
Obligation of State and Political Subdivisions [Member]
Available-for-sale Securities [Abstract]
Amortized Cost	78,301,000		90,284,000
Gross Unrealized Gains	4,818,000		5,865,000
Gross Unrealized Losses	0		0
Securities available-for-sale	83,119,000		96,149,000
Held-to-maturity [Abstract]
Amortized Cost	2,318,000		340,000
Gross Unrealized Gains	14,000		2,000
Gross Unrealized Losses	4,000		0
Fair Value	2,328,000		342,000
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]
Securities available-for-sale	83,119,000		96,149,000
Held-to-maturity Securities, Continuous Unrealized Loss Position [Abstract]
Securities with losses under 12 months, fair value	427,000
Securities with losses under 12 months, gross unrealized loss	4,000
Securities with losses over 12 months, fair value	0
Securities with losses over 12 months, gross unrealized losses	0
Total fair value	427,000
Total gross unrealized loss	4,000
GSE Mortgage-backed Securities [Member]
Available-for-sale Securities [Abstract]
Amortized Cost	138,129,000		105,409,000
Gross Unrealized Gains	7,382,000		4,078,000
Gross Unrealized Losses	0		0
Securities available-for-sale	145,511,000		109,487,000
Held-to-maturity [Abstract]
Amortized Cost	97,856,000		82,497,000
Gross Unrealized Gains	3,672,000		550,000
Gross Unrealized Losses	0		0
Fair Value	101,528,000		83,047,000
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]
Securities available-for-sale	145,511,000		109,487,000
Asset-backed Securities [Member]
Available-for-sale Securities [Abstract]
Amortized Cost	12,294,000
Gross Unrealized Gains	252,000
Gross Unrealized Losses	0
Securities available-for-sale	12,546,000
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]
Securities available-for-sale	12,546,000
Collateralized Mortgage Obligations: Residential [Member]
Available-for-sale Securities [Abstract]
Amortized Cost	38,081,000		40,855,000
Gross Unrealized Gains	584,000		618,000
Gross Unrealized Losses	2,000		5,000
Securities available-for-sale	38,663,000		41,468,000
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]
Securities available-for-sale	38,663,000		41,468,000
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Securities with Losses Under 12 Months, fair value	0		1,849,000
Securities with Losses under 12 Months, gross unrealized loss	0		1,000
Securities with Losses over 12 Months, fair value	107,000		136,000
Securities with Losses over 12 Months, gross unrealized loss	2,000		4,000
Total securities, fair value	107,000		1,985,000
Total securities, gross unrealized loss	2,000		5,000
Held-to-maturity Securities, Continuous Unrealized Loss Position [Abstract]
Number of Available-for-sale Securities	21
Number of Available-for-sale Securities in Unrealized Loss Positions	2
Collateralized Mortgage Obligations: Commercial [Member]
Available-for-sale Securities [Abstract]
Amortized Cost	28,701,000		24,609,000
Gross Unrealized Gains	1,319,000		529,000
Gross Unrealized Losses	0		0
Securities available-for-sale	30,020,000		25,138,000
Held-to-maturity [Abstract]
Amortized Cost	17,454,000		17,635,000
Gross Unrealized Gains	659,000		107,000
Gross Unrealized Losses	0		0
Fair Value	18,113,000		17,742,000
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]
Securities available-for-sale	$ 30,020,000		$ 25,138,000