Securities - Amortized Cost, Gross Unrealized Gains and Losses and Fair Values of Securities Available for Sale (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 201,350	$ 216,035
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax	3,022	3,001
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax	(524)	(1,464)
Fair Value	203,848	217,572
U.S. Government agencies and corporations
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	46,265	61,333
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax	92	63
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax	(163)	(634)
Assets, Fair Value Disclosure, Recurring	46,194
Fair Value		60,762
Mortgage backed securities: residential
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	90,474	92,456
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax	1,162	1,243
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax	(324)	(479)
Assets, Fair Value Disclosure, Recurring	91,312
Fair Value		93,220
Residential collateralized mortgage obligations
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	31,883	28,617
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax	242	138
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax	0	(220)
Assets, Fair Value Disclosure, Recurring	32,125
Fair Value		28,535
State and political subdivisions
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	32,728	33,629
Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax	1,526	1,557
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax	(37)	(131)
Assets, Fair Value Disclosure, Recurring	34,217
Fair Value		$ 35,055