Securities (Narrative) (Details) (USD $)	Mar. 31, 2013	Dec. 31, 2012
Schedule of Available-for-sale Securities [Line Items]
Texas municipal utility district bond portfolio	$ 14,000,000
Carrying value of securities pledged as collateral	140,942,000	135,348,000
Unrealized losses within the less than 12 months category	35,000	83,000
TEXAS
Schedule of Available-for-sale Securities [Line Items]
Concentration of municipal bond portfolio	17.00%
PENNSYLVANIA
Schedule of Available-for-sale Securities [Line Items]
Concentration of municipal bond portfolio	42.00%
U.S. Agency [Member]
Schedule of Available-for-sale Securities [Line Items]
Unrealized losses within the less than 12 months category	17,000	25,000
Number of securities with unrealized losses within the less than 12 months category	3
U.S. Agency Mortgage-Backed, Residential [Member]
Schedule of Available-for-sale Securities [Line Items]
Unrealized losses within the less than 12 months category	3,000
Number of securities with unrealized losses within the less than 12 months category	1
State And Municipal [Member]
Schedule of Available-for-sale Securities [Line Items]
Unrealized losses within the less than 12 months category	$ 15,000	$ 58,000
Number of securities with unrealized losses within the less than 12 months category	15