Investment Securities (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013		Dec. 31, 2012
Securities Available for Sale
Amortized Cost	$ 167,891		$ 141,151
Gross Unrealized Gains	1,952		3,555
Gross Unrealized Losses	(2,617)		(413)
Fair Value	167,226		144,293
Securities Held to Maturity
Amortized Cost	35,113		10,099
Gross Unrealized Gains	753		966
Gross Unrealized Losses	(357)		(55)
Fair Value	35,509		11,010
U.S. Treasury and U.S. Government-sponsored agencies [Member]
Securities Available for Sale
Amortized Cost	6,116		11,016
Gross Unrealized Gains	4		19
Gross Unrealized Losses	(49)		0
Fair Value	6,071		11,035
Securities Held to Maturity
Amortized Cost	1,698		1,740
Gross Unrealized Gains	180		284
Gross Unrealized Losses	0		0
Fair Value	1,878		2,024
Municipal Bonds [Member]
Securities Available for Sale
Amortized Cost	51,157		45,537
Gross Unrealized Gains	883		1,943
Gross Unrealized Losses	(1,653)		(120)
Fair Value	50,387		47,360
Securities Held to Maturity
Amortized Cost	25,521		2,946
Gross Unrealized Gains	215		212
Gross Unrealized Losses	(136)		0
Fair Value	25,600		3,158
U.S. Government-sponsored agencies [Member]
Securities Available for Sale
Amortized Cost	110,618		84,598
Gross Unrealized Gains	1,065		1,593
Gross Unrealized Losses	(915)		(293)
Fair Value	110,768		85,898
Securities Held to Maturity
Amortized Cost	6,814		4,245
Gross Unrealized Gains	177		277
Gross Unrealized Losses	(187)		0
Fair Value	6,804		4,522
Private residential collateralized mortgage obligations [Member]
Securities Held to Maturity
Amortized Cost	1,080		1,168
Gross Unrealized Gains	181		193
Gross Unrealized Losses	(34)		(55)
Fair Value	$ 1,227	[1]	$ 1,306

[1] Level two valuation assumptions were used to determine the fair value of held to maturity securities in the Fund.