Investment Securities (Details) (USD $)	3 Months Ended
	Mar. 31, 2014 Security Label	Mar. 31, 2013 Security	Dec. 31, 2013
Available-for-sale Securities [Abstract]
Amortized Cost	$ 328,705,000		$ 341,828,000
Gross Unrealized Gains	6,752,000		5,576,000
Gross Unrealized Losses	3,969,000		5,739,000
Fair Value	331,488,000		341,665,000
Held-to-maturity [Abstract]
Amortized Cost	152,162,000		155,523,000	[1]
Gross Unrealized Gains	681,000		289,000
Gross Unrealized Losses	2,869,000		4,644,000
Fair Value	149,974,000		151,168,000
Number of Private label Collateralized Mortgage Obligations	3
Combined balance of private-label collateralized mortgage obligations	57,000
Available-for-sale, Amortized Cost [Abstract]
Due in one year or less	8,965,000
Due after one year through five years	34,408,000
Due after five years through ten years	14,871,000
Due after ten years	5,181,000
Other asset-backed securities	24,955,000
Mortgage-backed securities and collateralized mortgage obligations: Residential, Amortized Cost	212,856,000
Mortgage-backed securities and collateralized mortgage obligations: Commercial, Amortized Cost	27,005,000
Collateralized debt obligation	464,000
Available-for-sale securities, Amortized Cost	328,705,000
Available-for-sale, Fair Value [Abstract]
Due in one year or less	9,094,000
Due after one year through five years	35,389,000
Due after five years through ten years	15,649,000
Due after ten years	5,094,000
Other asset-backed securities	25,363,000
Mortgage-backed securities and collateralized mortgage obligations: Residential, Fair Value	212,295,000
Mortgage-backed securities and collateralized mortgage obligations: Commercial, Fair Value	27,231,000
Collateralized debt obligation	1,373,000
Available-for-sale securities, Fair Value	331,488,000
Held-to-maturity, Amortized Cost [Abstract]
Due in one year or less	107,000
Due after one year through five years	2,411,000
Due after five years through ten years	6,928,000
Due after ten years	37,553,000
Mortgage-backed securities and collateralized mortgage obligations: Residential, Amortized Cost	89,531,000
Mortgage-backed securities and collateralized mortgage obligations: Commercial, Amortized Cost	15,632,000
Held-to-maturity securities, Amortized Cost	152,162,000
Held-to-maturity, Fair Value [Abstract]
Due in one year or less	107,000
Due after one year through five years	2,408,000
Due after five years through ten years	6,768,000
Due after ten years	36,242,000
Mortgage-backed securities and collateralized mortgage obligations: Residential, Fair Value	88,744,000
Mortgage-backed securities and collateralized mortgage obligations: Commercial, Fair Value	15,705,000
Held-to-maturity securities, Fair Value	149,974,000
Available-for-sale [Abstract]
Securities with losses under 12 months, Fair Value, Available-for-sale	120,740,000		157,103,000
Securities with losses under 12 months, Gross Unrealized Loss, Available-for-sale	3,275,000		5,408,000
Securities with losses over 12 months, Fair Value, Available-for-sale	24,352,000		4,371,000
Securities with losses over 12 months, Gross Unrealized Loss, Available-for-sale	694,000		331,000
Total securities, Fair Value, Available-for-sale	145,092,000		161,474,000
Total securities, Gross Unrealized Loss, Available-for-sale	3,969,000		5,739,000
Held-to-maturity [Abstract]
Securities with losses under 12 months, Fair Value, Held-to-maturity	58,787,000		86,498,000
Securities with losses under 12 months, Gross Unrealized Loss, Held-to-maturity	1,728,000		4,627,000
Securities with losses over 12 months, Fair Value, Held-to-maturity	25,950,000		685,000
Securities with losses over 12 months, Gross Unrealized Loss, Held-to-maturity	1,141,000		17,000
Total securities, Fair Value, Held-to-maturity	84,737,000		87,183,000
Total securities, Gross Unrealized Loss, Held-to-maturity	2,869,000		4,644,000
Number of available-for-sale and held-to-maturity securities in unrealized loss positions	101
Unrealized losses as a percentage of individual securities' amortized cost basis (in hundredths)	2.89%
Unrealized losses as a percentage of the Company's total amortized cost basis (in hundredths)	1.42%
Number of available-for-sale securities in continuous loss position	31
Unamortized cost basis of securities in a continuous loss position	52,100,000
Unrealized loss on securities in a continuous loss position	1,800,000
Number of impairment related to credit quality	0
Number of impaired securities evaluated as other temporary	0
Impairment losses recognized on debt securities	0
Number of available-for-sale securities sold		21
Available-for-sale securities, net gain		204,000
Number of available-for-sale securities sold with gains		18
Available-for-sale securities, gross realized gains		217,000
Number of available-for-sale securities sold with loss		3
Available-for-sale securities, gross realized losses		13,000
Securities pledged to secure public funds on deposits and for other purposes required or permitted by law	270,500,000		259,900,000
U.S. Government Sponsored Enterprises [Member]
Available-for-sale Securities [Abstract]
Amortized Cost	11,328,000		11,455,000
Gross Unrealized Gains	1,000		1,000
Gross Unrealized Losses	163,000		191,000
Fair Value	11,166,000		11,265,000
Available-for-sale [Abstract]
Securities with losses under 12 months, Fair Value, Available-for-sale	10,413,000		10,463,000
Securities with losses under 12 months, Gross Unrealized Loss, Available-for-sale	163,000		191,000
Securities with losses over 12 months, Fair Value, Available-for-sale	0		0
Securities with losses over 12 months, Gross Unrealized Loss, Available-for-sale	0		0
Total securities, Fair Value, Available-for-sale	10,413,000		10,463,000
Total securities, Gross Unrealized Loss, Available-for-sale	163,000		191,000
Obligation of State and Political Subdivisions [Member]
Available-for-sale Securities [Abstract]
Amortized Cost	52,097,000		57,925,000
Gross Unrealized Gains	2,079,000		2,296,000
Gross Unrealized Losses	116,000		243,000
Fair Value	54,060,000		59,978,000
Held-to-maturity [Abstract]
Amortized Cost	46,999,000		47,377,000
Gross Unrealized Gains	18,000		38,000
Gross Unrealized Losses	1,492,000		2,586,000
Fair Value	45,525,000		44,829,000
Available-for-sale [Abstract]
Securities with losses under 12 months, Fair Value, Available-for-sale	3,850,000		4,256,000
Securities with losses under 12 months, Gross Unrealized Loss, Available-for-sale	109,000		243,000
Securities with losses over 12 months, Fair Value, Available-for-sale	481,000		0
Securities with losses over 12 months, Gross Unrealized Loss, Available-for-sale	7,000		0
Total securities, Fair Value, Available-for-sale	4,331,000		4,256,000
Total securities, Gross Unrealized Loss, Available-for-sale	116,000		243,000
Held-to-maturity [Abstract]
Securities with losses under 12 months, Fair Value, Held-to-maturity	19,478,000		42,246,000
Securities with losses under 12 months, Gross Unrealized Loss, Held-to-maturity	622,000		2,569,000
Securities with losses over 12 months, Fair Value, Held-to-maturity	21,648,000		685,000
Securities with losses over 12 months, Gross Unrealized Loss, Held-to-maturity	870,000		17,000
Total securities, Fair Value, Held-to-maturity	41,126,000		42,931,000
Total securities, Gross Unrealized Loss, Held-to-maturity	1,492,000		2,586,000
GSE Mortgage-Backed Securities [Member]
Available-for-sale Securities [Abstract]
Amortized Cost	141,719,000		146,129,000
Gross Unrealized Gains	2,597,000		2,029,000
Gross Unrealized Losses	1,371,000		2,193,000
Fair Value	142,945,000		145,965,000
Held-to-maturity [Abstract]
Amortized Cost	75,634,000		78,272,000
Gross Unrealized Gains	590,000		148,000
Gross Unrealized Losses	706,000		1,079,000
Fair Value	75,518,000		77,341,000
Available-for-sale [Abstract]
Securities with losses under 12 months, Fair Value, Available-for-sale	56,625,000		68,028,000
Securities with losses under 12 months, Gross Unrealized Loss, Available-for-sale	1,360,000		2,193,000
Securities with losses over 12 months, Fair Value, Available-for-sale	10,702,000		0
Securities with losses over 12 months, Gross Unrealized Loss, Available-for-sale	11,000		0
Total securities, Fair Value, Available-for-sale	67,327,000		68,028,000
Total securities, Gross Unrealized Loss, Available-for-sale	1,371,000		2,193,000
Held-to-maturity [Abstract]
Securities with losses under 12 months, Fair Value, Held-to-maturity	30,385,000		31,042,000
Securities with losses under 12 months, Gross Unrealized Loss, Held-to-maturity	706,000		1,079,000
Securities with losses over 12 months, Fair Value, Held-to-maturity	0		0
Securities with losses over 12 months, Gross Unrealized Loss, Held-to-maturity	0		0
Total securities, Fair Value, Held-to-maturity	30,385,000		31,042,000
Total securities, Gross Unrealized Loss, Held-to-maturity	706,000		1,079,000
Collateralized Mortgage Obligations: Residential [Member]
Available-for-sale Securities [Abstract]
Amortized Cost	71,137,000		73,569,000
Gross Unrealized Gains	360,000		212,000
Gross Unrealized Losses	2,147,000		2,894,000
Fair Value	69,350,000		70,887,000
Held-to-maturity [Abstract]
Amortized Cost	13,897,000		14,189,000
Gross Unrealized Gains	0		0
Gross Unrealized Losses	671,000		979,000
Fair Value	13,226,000		13,210,000
Available-for-sale [Abstract]
Securities with losses under 12 months, Fair Value, Available-for-sale	39,722,000		56,975,000
Securities with losses under 12 months, Gross Unrealized Loss, Available-for-sale	1,471,000		2,563,000
Securities with losses over 12 months, Fair Value, Available-for-sale	13,169,000		4,371,000
Securities with losses over 12 months, Gross Unrealized Loss, Available-for-sale	676,000		331,000
Total securities, Fair Value, Available-for-sale	52,891,000		61,346,000
Total securities, Gross Unrealized Loss, Available-for-sale	2,147,000		2,894,000
Held-to-maturity [Abstract]
Securities with losses under 12 months, Fair Value, Held-to-maturity	8,924,000		13,210,000
Securities with losses under 12 months, Gross Unrealized Loss, Held-to-maturity	400,000		979,000
Securities with losses over 12 months, Fair Value, Held-to-maturity	4,302,000		0
Securities with losses over 12 months, Gross Unrealized Loss, Held-to-maturity	271,000		0
Total securities, Fair Value, Held-to-maturity	13,226,000		13,210,000
Total securities, Gross Unrealized Loss, Held-to-maturity	671,000		979,000
Collateralized Mortgage Obligations: Commercial [Member]
Available-for-sale Securities [Abstract]
Amortized Cost	27,005,000		27,082,000
Gross Unrealized Gains	374,000		416,000
Gross Unrealized Losses	148,000		152,000
Fair Value	27,231,000		27,346,000
Held-to-maturity [Abstract]
Amortized Cost	15,632,000		15,685,000
Gross Unrealized Gains	73,000		103,000
Gross Unrealized Losses	0		0
Fair Value	15,705,000		15,788,000
Available-for-sale [Abstract]
Securities with losses under 12 months, Fair Value, Available-for-sale	4,266,000		4,282,000
Securities with losses under 12 months, Gross Unrealized Loss, Available-for-sale	148,000		152,000
Securities with losses over 12 months, Fair Value, Available-for-sale	0		0
Securities with losses over 12 months, Gross Unrealized Loss, Available-for-sale	0		0
Total securities, Fair Value, Available-for-sale	4,266,000		4,282,000
Total securities, Gross Unrealized Loss, Available-for-sale	148,000		152,000
Other Asset-Backed Securities [Member]
Available-for-sale Securities [Abstract]
Amortized Cost	24,955,000		25,204,000
Gross Unrealized Gains	432,000		351,000
Gross Unrealized Losses	24,000		66,000
Fair Value	25,363,000		25,489,000
Available-for-sale [Abstract]
Securities with losses under 12 months, Fair Value, Available-for-sale	5,864,000		13,099,000
Securities with losses under 12 months, Gross Unrealized Loss, Available-for-sale	24,000		66,000
Securities with losses over 12 months, Fair Value, Available-for-sale	0		0
Securities with losses over 12 months, Gross Unrealized Loss, Available-for-sale	0		0
Total securities, Fair Value, Available-for-sale	5,864,000		13,099,000
Total securities, Gross Unrealized Loss, Available-for-sale	24,000		66,000
Collateralized Debt Obligations [Member]
Available-for-sale Securities [Abstract]
Amortized Cost	464,000		464,000
Gross Unrealized Gains	909,000		271,000
Gross Unrealized Losses	0		0
Fair Value	$ 1,373,000		$ 735,000

[1] Derived from audited financial statements.