Investment Securities (Details) (USD $)	3 Months Ended
	Mar. 31, 2015 Label Security	Mar. 31, 2014 Security	Dec. 31, 2014
Available-for-sale Securities [Abstract]
Amortized Cost	$ 293,709,000		$ 272,588,000
Gross Unrealized Gains	6,971,000		6,471,000
Gross Unrealized Losses	990,000		2,075,000
Fair Value	299,690,000		276,984,000	[1]
Available-for-sale, Amortized Cost [Abstract]
Due in one year or less	6,916,000
Due after one year through five years	18,900,000
Due after five years through ten years	12,422,000
Due after ten years	3,098,000
Mortgage-backed securities and collateralized mortgage obligations: Residential, Amortized Cost	232,558,000
Mortgage-backed securities and collateralized mortgage obligations: Commercial, Amortized Cost	17,459,000
Collateralized debt obligation	256,000
Mutual funds	2,100,000
Amortized Cost	293,709,000		272,588,000
Available-for-sale, Fair Value [Abstract]
Due in one year or less	6,998,000
Due after one year through five years	19,694,000
Due after five years through ten years	12,972,000
Due after ten years	3,113,000
Mortgage-backed securities and collateralized mortgage obligations: Residential, Fair Value	235,955,000
Mortgage-backed securities and collateralized mortgage obligations: Commercial, Fair Value	17,483,000
Collateralized debt obligation	1,352,000
Mutual funds	2,123,000
Fair Value	299,690,000		276,984,000	[1]
Available-for-sale [Abstract]
Securities with losses under 12 months, Fair Value, Available-for-sale	40,776,000		29,437,000
Securities with losses under 12 months, Gross Unrealized Loss, Available-for-sale	171,000		158,000
Securities with losses over 12 months, Fair Value, Available-for-sale	46,963,000		68,536,000
Securities with losses over 12 months, Gross Unrealized Loss, Available-for-sale	819,000		1,917,000
Total securities, Fair Value, Available-for-sale	87,739,000		97,973,000
Total securities, Gross Unrealized Loss, Available-for-sale	990,000		2,075,000
Held-to-maturity [Abstract]
Amortized Cost	137,592,000		141,201,000	[1]
Gross Unrealized Gains	2,281,000		1,400,000
Gross Unrealized Losses	411,000		1,008,000
Fair Value	139,462,000		141,593,000
Held-to-maturity, Amortized Cost [Abstract]
Due in one year or less	595,000
Due after one year through five years	2,819,000
Due after five years through ten years	12,205,000
Due after ten years	29,724,000
Mortgage-backed securities and collateralized mortgage obligations: Residential, Amortized Cost	77,049,000
Mortgage-backed securities and collateralized mortgage obligations: Commercial, Amortized Cost	15,200,000
Amortized Cost	137,592,000		141,201,000	[1]
Held-to-maturity, Fair Value [Abstract]
Due in one year or less	600,000
Due after one year through five years	2,857,000
Due after five years through ten years	12,346,000
Due after ten years	30,105,000
Mortgage-backed securities and collateralized mortgage obligations: Residential, Fair Value	78,246,000
Mortgage-backed securities and collateralized mortgage obligations: Commercial, Fair Value	15,308,000
Fair Value	139,462,000		141,593,000
Held-to-maturity Securities, Continuous Unrealized Loss Position [Abstract]
Securities with losses under 12 months, Fair Value, Held-to-maturity	4,271,000		19,360,000
Securities with losses under 12 months, Gross Unrealized Loss, Held-to-maturity	19,000		208,000
Securities with losses over 12 months, Fair Value, Held-to-maturity	22,765,000		33,635,000
Securities with losses over 12 months, Gross Unrealized Loss, Held-to-maturity	392,000		800,000
Total securities, Fair Value, Held-to-maturity	27,036,000		52,995,000
Total securities, Gross Unrealized Loss, Held-to-maturity	411,000		1,008,000
Number of Private label Collateralized Mortgage Obligations	3
Combined balance of private-label collateralized mortgage obligations	41,000
Number of available-for-sale and held-to-maturity securities in unrealized loss positions	37
Unrealized losses as a percentage of individual securities' amortized cost basis (in hundredths)	1.21%
Unrealized losses as a percentage of the Company's total amortized cost basis (in hundredths)	0.33%
Number of available-for-sale securities in continuous loss position	20
Unamortized cost basis of securities in a continuous loss position	70,900,000
Unrealized loss on securities in a continuous loss position	1,200,000
Impairment losses recognized on debt securities	0
Number of available-for-sale securities sold	18	0
Available-for-sale securities, net gain	115,000
Number of available-for-sale securities sold with gains	8
Available-for-sale securities, gross realized gains	250,000
Number of available-for-sale securities sold with loss	10
Available-for-sale securities, gross realized losses	135,000
Securities pledged to secure public funds on deposits and for other purposes required or permitted by law	294,400,000		279,800,000
U.S. Government Sponsored Enterprises [Member]
Available-for-sale Securities [Abstract]
Amortized Cost			10,339,000
Gross Unrealized Gains			0
Gross Unrealized Losses			112,000
Fair Value			10,227,000
Available-for-sale, Amortized Cost [Abstract]
Amortized Cost			10,339,000
Available-for-sale, Fair Value [Abstract]
Fair Value			10,227,000
Available-for-sale [Abstract]
Securities with losses under 12 months, Fair Value, Available-for-sale			4,973,000
Securities with losses under 12 months, Gross Unrealized Loss, Available-for-sale			32,000
Securities with losses over 12 months, Fair Value, Available-for-sale			5,254,000
Securities with losses over 12 months, Gross Unrealized Loss, Available-for-sale			80,000
Total securities, Fair Value, Available-for-sale			10,227,000
Total securities, Gross Unrealized Loss, Available-for-sale			112,000
Obligation of State and Political Subdivisions [Member]
Available-for-sale Securities [Abstract]
Amortized Cost	41,336,000		43,079,000
Gross Unrealized Gains	1,476,000		1,555,000
Gross Unrealized Losses	35,000		29,000
Fair Value	42,777,000		44,605,000
Available-for-sale, Amortized Cost [Abstract]
Amortized Cost	41,336,000		43,079,000
Available-for-sale, Fair Value [Abstract]
Fair Value	42,777,000		44,605,000
Available-for-sale [Abstract]
Securities with losses under 12 months, Fair Value, Available-for-sale	3,241,000		2,029,000
Securities with losses under 12 months, Gross Unrealized Loss, Available-for-sale	35,000		29,000
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	3,241,000		2,029,000
Total securities, Gross Unrealized Loss, Available-for-sale	35,000		29,000
Held-to-maturity [Abstract]
Amortized Cost	45,343,000		45,914,000
Gross Unrealized Gains	621,000		267,000
Gross Unrealized Losses	56,000		192,000
Fair Value	45,908,000		45,989,000
Held-to-maturity, Amortized Cost [Abstract]
Amortized Cost	45,343,000		45,914,000
Held-to-maturity, Fair Value [Abstract]
Fair Value	45,908,000		45,989,000
Held-to-maturity Securities, Continuous Unrealized Loss Position [Abstract]
Securities with losses under 12 months, Fair Value, Held-to-maturity	4,271,000		11,761,000
Securities with losses under 12 months, Gross Unrealized Loss, Held-to-maturity	19,000		35,000
Securities with losses over 12 months, Fair Value, Held-to-maturity	2,740,000		13,263,000
Securities with losses over 12 months, Gross Unrealized Loss, Held-to-maturity	37,000		157,000
Total securities, Fair Value, Held-to-maturity	7,011,000		25,024,000
Total securities, Gross Unrealized Loss, Held-to-maturity	56,000		192,000
GSE Mortgage-Backed Securities [Member]
Available-for-sale Securities [Abstract]
Amortized Cost	101,185,000		106,208,000
Gross Unrealized Gains	3,669,000		3,183,000
Gross Unrealized Losses	66,000		288,000
Fair Value	104,788,000		109,103,000
Available-for-sale, Amortized Cost [Abstract]
Amortized Cost	101,185,000		106,208,000
Available-for-sale, Fair Value [Abstract]
Fair Value	104,788,000		109,103,000
Available-for-sale [Abstract]
Securities with losses under 12 months, Fair Value, Available-for-sale	12,876,000		6,668,000
Securities with losses under 12 months, Gross Unrealized Loss, Available-for-sale	33,000		25,000
Securities with losses over 12 months, Fair Value, Available-for-sale	8,249,000		21,538,000
Securities with losses over 12 months, Gross Unrealized Loss, Available-for-sale	33,000		263,000
Total securities, Fair Value, Available-for-sale	21,125,000		28,206,000
Total securities, Gross Unrealized Loss, Available-for-sale	66,000		288,000
Held-to-maturity [Abstract]
Amortized Cost	64,710,000		67,268,000
Gross Unrealized Gains	1,552,000		1,080,000
Gross Unrealized Losses	85,000		164,000
Fair Value	66,177,000		68,184,000
Held-to-maturity, Amortized Cost [Abstract]
Amortized Cost	64,710,000		67,268,000
Held-to-maturity, Fair Value [Abstract]
Fair Value	66,177,000		68,184,000
Held-to-maturity Securities, Continuous Unrealized Loss Position [Abstract]
Securities with losses under 12 months, Fair Value, Held-to-maturity	0		0
Securities with losses under 12 months, Gross Unrealized Loss, Held-to-maturity	0		0
Securities with losses over 12 months, Fair Value, Held-to-maturity	7,957,000		8,142,000
Securities with losses over 12 months, Gross Unrealized Loss, Held-to-maturity	85,000		164,000
Total securities, Fair Value, Held-to-maturity	7,957,000		8,142,000
Total securities, Gross Unrealized Loss, Held-to-maturity	85,000		164,000
Collateralized Mortgage Obligations: Residential [Member]
Available-for-sale Securities [Abstract]
Amortized Cost	131,373,000		62,093,000
Gross Unrealized Gains	614,000		266,000
Gross Unrealized Losses	820,000		1,520,000
Fair Value	131,167,000		60,839,000
Available-for-sale, Amortized Cost [Abstract]
Amortized Cost	131,373,000		62,093,000
Available-for-sale, Fair Value [Abstract]
Fair Value	131,167,000		60,839,000
Available-for-sale [Abstract]
Securities with losses under 12 months, Fair Value, Available-for-sale	24,659,000		9,366,000
Securities with losses under 12 months, Gross Unrealized Loss, Available-for-sale	103,000		53,000
Securities with losses over 12 months, Fair Value, Available-for-sale	35,097,000		37,997,000
Securities with losses over 12 months, Gross Unrealized Loss, Available-for-sale	717,000		1,467,000
Total securities, Fair Value, Available-for-sale	59,756,000		47,363,000
Total securities, Gross Unrealized Loss, Available-for-sale	820,000		1,520,000
Held-to-maturity [Abstract]
Amortized Cost	12,339,000		12,709,000
Gross Unrealized Gains	0		0
Gross Unrealized Losses	270,000		479,000
Fair Value	12,069,000		12,230,000
Held-to-maturity, Amortized Cost [Abstract]
Amortized Cost	12,339,000		12,709,000
Held-to-maturity, Fair Value [Abstract]
Fair Value	12,069,000		12,230,000
Held-to-maturity Securities, Continuous Unrealized Loss Position [Abstract]
Securities with losses under 12 months, Fair Value, Held-to-maturity	0		0
Securities with losses under 12 months, Gross Unrealized Loss, Held-to-maturity	0		0
Securities with losses over 12 months, Fair Value, Held-to-maturity	12,068,000		12,230,000
Securities with losses over 12 months, Gross Unrealized Loss, Held-to-maturity	270,000		479,000
Total securities, Fair Value, Held-to-maturity	12,068,000		12,230,000
Total securities, Gross Unrealized Loss, Held-to-maturity	270,000		479,000
Collateralized Mortgage Obligations: Commercial [Member]
Available-for-sale Securities [Abstract]
Amortized Cost	17,459,000		24,462,000
Gross Unrealized Gains	93,000		190,000
Gross Unrealized Losses	69,000		107,000
Fair Value	17,483,000		24,545,000
Available-for-sale, Amortized Cost [Abstract]
Amortized Cost	17,459,000		24,462,000
Available-for-sale, Fair Value [Abstract]
Fair Value	17,483,000		24,545,000
Available-for-sale [Abstract]
Securities with losses under 12 months, Fair Value, Available-for-sale	0		0
Securities with losses under 12 months, Gross Unrealized Loss, Available-for-sale	0		0
Securities with losses over 12 months, Fair Value, Available-for-sale	3,617,000		3,747,000
Securities with losses over 12 months, Gross Unrealized Loss, Available-for-sale	69,000		107,000
Total securities, Fair Value, Available-for-sale	3,617,000		3,747,000
Total securities, Gross Unrealized Loss, Available-for-sale	69,000		107,000
Held-to-maturity [Abstract]
Amortized Cost	15,200,000		15,310,000
Gross Unrealized Gains	108,000		53,000
Gross Unrealized Losses	0		173,000
Fair Value	15,308,000		15,190,000
Held-to-maturity, Amortized Cost [Abstract]
Amortized Cost	15,200,000		15,310,000
Held-to-maturity, Fair Value [Abstract]
Fair Value	15,308,000		15,190,000
Held-to-maturity Securities, Continuous Unrealized Loss Position [Abstract]
Securities with losses under 12 months, Fair Value, Held-to-maturity			7,599,000
Securities with losses under 12 months, Gross Unrealized Loss, Held-to-maturity			173,000
Securities with losses over 12 months, Fair Value, Held-to-maturity			0
Securities with losses over 12 months, Gross Unrealized Loss, Held-to-maturity			0
Total securities, Fair Value, Held-to-maturity			7,599,000
Total securities, Gross Unrealized Loss, Held-to-maturity			173,000
Other Asset-Backed Securities [Member]
Available-for-sale Securities [Abstract]
Amortized Cost			24,041,000
Gross Unrealized Gains			321,000
Gross Unrealized Losses			19,000
Fair Value			24,343,000
Available-for-sale, Amortized Cost [Abstract]
Amortized Cost			24,041,000
Available-for-sale, Fair Value [Abstract]
Fair Value			24,343,000
Available-for-sale [Abstract]
Securities with losses under 12 months, Fair Value, Available-for-sale			6,401,000
Securities with losses under 12 months, Gross Unrealized Loss, Available-for-sale			19,000
Securities with losses over 12 months, Fair Value, Available-for-sale			0
Securities with losses over 12 months, Gross Unrealized Loss, Available-for-sale			0
Total securities, Fair Value, Available-for-sale			6,401,000
Total securities, Gross Unrealized Loss, Available-for-sale			19,000
Collateralized Debt Obligations [Member]
Available-for-sale Securities [Abstract]
Amortized Cost	256,000		266,000
Gross Unrealized Gains	1,096,000		952,000
Gross Unrealized Losses	0		0
Fair Value	1,352,000		1,218,000
Available-for-sale, Amortized Cost [Abstract]
Amortized Cost	256,000		266,000
Available-for-sale, Fair Value [Abstract]
Fair Value	1,352,000		1,218,000
Mutual Funds [Member]
Available-for-sale Securities [Abstract]
Amortized Cost	2,100,000		2,100,000
Gross Unrealized Gains	23,000		4,000
Gross Unrealized Losses	0		0
Fair Value	2,123,000		2,104,000
Available-for-sale, Amortized Cost [Abstract]
Amortized Cost	2,100,000		2,100,000
Available-for-sale, Fair Value [Abstract]
Fair Value	$ 2,123,000		$ 2,104,000

[1] Derived from audited financial statements.