Investment Securities (Details) (USD $)	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Dec. 31, 2011
Available-for-sale Securities [Abstract]
Available-for-sale, Amortized Cost	$ 357,393,000		$ 355,496,000
Available-for-sale, Gross Unrealized Gains	12,946,000		11,752,000
Available-for-sale, Gross Unrealized Losses	46,000		7,000
Available-for-sale, Fair Value	370,293,000		367,241,000	[1]
Held-to-maturity [Abstract]
Held-to-maturity, Amortized Cost	123,054,000		100,472,000
Held-to-maturity, Gross Unrealized Gains	2,858,000		659,000
Held-to-maturity, Gross Unrealized Losses	0		0
Held-to-maturity, Fair Value	125,912,000		101,131,000
Number of Private-label Collateralized Mortgage Obligations	3
Combined Balance of Private-label Collateralized Mortgage Obligations	119,000
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity [Abstract]
Available-for-sale Securities, Debt Maturities, Due in One Year or Less, Amortized Cost	73,193,000
Available-for-sale Securities, Debt Maturities, Due after One Year through Five Years, Amortized Cost	46,458,000
Available-for-sale Securities, Debt Maturities, Due after Five Years through Ten Years, Amortized Cost	25,988,000
Available-for-sale Securities, Debt Maturities, Due after Ten Years, Amortized Cost	4,765,000
Asset-backed securities, Available for Sale, Amortized Cost	12,392,000
Mortgage-backed securities and collateralized mortgage obligations: Residential, Available for Sale, Amortized Cost	165,811,000
Mortgage-backed securities and collateralized mortgage obligations: Commercial, Available for Sale, Amortized Cost	28,786,000
Available-for-sale securities, amortized Cost	357,393,000
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]
Available-for-sale Securities, Debt Maturities, Due in One Year or Less, Fair Value	73,614,000
Available-for-sale Securities, Debt Maturities, Due after One Year through Five Years, Fair Value	48,905,000
Available-for-sale Securities, Debt Maturities, Due after Five Years through Ten Years, Fair Value	28,336,000
Available-for-sale Securities, Debt Maturities, Due after Ten Years, Fair Value	5,015,000
Asset-backed securities, Available for Sale, Fair Value	12,463,000
Mortgage-backed securities and collateralized mortgage obligations: Residential, Available for Sale, Fair Value	172,030,000
Mortgage-backed securities and collateralized mortgage obligations: Commercial, Available for Sale, Fair Value	29,930,000
Available-for-sale securities, Fair Value	370,293,000		367,241,000	[1]
Held-to-maturity Securities, Debt Maturities, Amortized Cost [Abstract]
Held-to-maturity Securities, Debt Maturities, Due in One Year or Less, Amortized Cost	0
Held-to-maturity Securities, Debt Maturities, Due after One through Five Years, Amortized Cost	200,000
Mortgage-backed securities and collateralized mortgage obligations: Residential, Available for Sale, Amortized Cost	105,339,000
Mortgage-backed securities and collateralized mortgage obligations: Commercial, Available for Sale, Amortized Cost	17,515,000
Held-to-maturity securities, Amortized Cost	123,054,000
Held-to-maturity Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]
Held-to-maturity Securities, Debt Maturities, Due in One Year or Less, Fair Value	0
Held-to-maturity Securities, Debt Maturities, Due after One Year through Five, Fair Value	201,000
Mortgage-backed securities and collateralized mortgage obligations: Residential, Available for Sale, Fair Value	107,643,000
Mortgage-backed securities and collateralized mortgage obligations: Commercial, Available for Sale, Fair Value	18,068,000
Held-to-maturity securities, Fair Value	125,912,000
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Securities with Losses Under 12 Months, Fair Value	10,037,000		8,053,000
Securities with Losses under 12 Months, Gross Unrealized Loss	43,000		3,000
Securities with Losses over 12 Months, Fair Value	119,000		136,000
Securities with Losses over 12 Months, Gross Unrealized Loss	3,000		4,000
Total Securities, Fair Value	10,156,000		8,189,000
Total Securities, Gross Unrealized Loss	46,000		7,000
Number of Available-for-sale Securities Sold	3	5
Number of Available-for-sale Securities sold with gains	3	4
Available-for-sale Securities, Gross Realized Gains	135,000	94,000
Number of Available-for-sale Securities sold with loss		1
Number of Held-to-maturity securities sold		1
Available-for-sale Securities, Gross Realized Losses		4,000
Available-for-sale Securities, Net Gain		90,000
Held to maturity security, Net gain on sale		9,000
Carrying value of securities pledged as collateral	141,000,000		154,100,000
U.S. Government Sponsored Enterprises [Member]
Available-for-sale Securities [Abstract]
Available-for-sale, Amortized Cost	68,241,000		94,339,000
Available-for-sale, Gross Unrealized Gains	262,000		662,000
Available-for-sale, Gross Unrealized Losses	0		2,000
Available-for-sale, Fair Value	68,503,000		94,999,000
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]
Available-for-sale securities, Fair Value	68,503,000		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]
Available-for-sale, Amortized Cost	82,163,000		90,284,000
Available-for-sale, Gross Unrealized Gains	5,204,000		5,865,000
Available-for-sale, Gross Unrealized Losses	0		0
Available-for-sale, Fair Value	87,367,000		96,149,000
Held-to-maturity [Abstract]
Held-to-maturity, Amortized Cost	200,000		340,000
Held-to-maturity, Gross Unrealized Gains	1,000		2,000
Held-to-maturity, Gross Unrealized Losses	0		0
Held-to-maturity, Fair Value	201,000		342,000
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]
Available-for-sale securities, Fair Value	87,367,000		96,149,000
GSE Mortgage-backed Securities [Member]
Available-for-sale Securities [Abstract]
Available-for-sale, Amortized Cost	118,436,000		105,409,000
Available-for-sale, Gross Unrealized Gains	5,706,000		4,078,000
Available-for-sale, Gross Unrealized Losses	0		0
Available-for-sale, Fair Value	124,142,000		109,487,000
Held-to-maturity [Abstract]
Held-to-maturity, Amortized Cost	105,339,000		82,497,000
Held-to-maturity, Gross Unrealized Gains	2,304,000		550,000
Held-to-maturity, Gross Unrealized Losses	0		0
Held-to-maturity, Fair Value	107,643,000		83,047,000
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]
Available-for-sale securities, Fair Value	124,142,000		109,487,000
Asset-backed Securities [Member]
Available-for-sale Securities [Abstract]
Available-for-sale, Amortized Cost	12,392,000
Available-for-sale, Gross Unrealized Gains	93,000
Available-for-sale, Gross Unrealized Losses	22,000
Available-for-sale, Fair Value	12,463,000
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]
Available-for-sale securities, Fair Value	12,463,000
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Securities with Losses Under 12 Months, Fair Value	5,603,000
Securities with Losses under 12 Months, Gross Unrealized Loss	22,000
Securities with Losses over 12 Months, Fair Value	0
Securities with Losses over 12 Months, Gross Unrealized Loss	0
Total Securities, Fair Value	5,603,000
Total Securities, Gross Unrealized Loss	22,000
Number of Available-for-sale Securities	4
Number of Available-for-sale Securities in Unrealized Loss Positions	2
Collateralized Mortgage Obligations: Residential [Member]
Available-for-sale Securities [Abstract]
Available-for-sale, Amortized Cost	47,375,000		40,855,000
Available-for-sale, Gross Unrealized Gains	537,000		618,000
Available-for-sale, Gross Unrealized Losses	24,000		5,000
Available-for-sale, Fair Value	47,888,000		41,468,000
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]
Available-for-sale securities, Fair Value	47,888,000		41,468,000
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Securities with Losses Under 12 Months, Fair Value	4,434,000		1,849,000
Securities with Losses under 12 Months, Gross Unrealized Loss	21,000		1,000
Securities with Losses over 12 Months, Fair Value	119,000		136,000
Securities with Losses over 12 Months, Gross Unrealized Loss	3,000		4,000
Total Securities, Fair Value	4,553,000		1,985,000
Total Securities, Gross Unrealized Loss	24,000		5,000
Number of Available-for-sale Securities	23
Number of Available-for-sale Securities in Unrealized Loss Positions	3
Collateralized Mortgage Obligations: Commercial [Member]
Available-for-sale Securities [Abstract]
Available-for-sale, Amortized Cost	28,786,000		24,609,000
Available-for-sale, Gross Unrealized Gains	1,144,000		529,000
Available-for-sale, Gross Unrealized Losses	0		0
Available-for-sale, Fair Value	29,930,000		25,138,000
Held-to-maturity [Abstract]
Held-to-maturity, Amortized Cost	17,515,000		17,635,000
Held-to-maturity, Gross Unrealized Gains	553,000		107,000
Held-to-maturity, Gross Unrealized Losses	0		0
Held-to-maturity, Fair Value	18,068,000		17,742,000
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]
Available-for-sale securities, Fair Value	$ 29,930,000		$ 25,138,000

[1] Derived from audited financial statements.