Securities (Details 2) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Summary of securities with gross unrealized losses, aggregated by investment category
Less than 12 Months, Fair Value	$ 1,444	$ 437
Less than 12 Months, gross Unrealized Losses	(15)	(8)
12 Months or Greater, Fair Value		0
12 Months or Greater ,Gross Unrealized Losses
Fair Value, Total	1,444	437
Gross Unrealized Losses, Total	(15)	(8)
Securities of U.S. Government agencies and corporations
Summary of securities with gross unrealized losses, aggregated by investment category
Less than 12 Months, Fair Value	1,000
Less than 12 Months, gross Unrealized Losses	(1)
12 Months or Greater, Fair Value
12 Months or Greater ,Gross Unrealized Losses
Fair Value, Total	1,000
Gross Unrealized Losses, Total	(1)
State and municipal securities
Summary of securities with gross unrealized losses, aggregated by investment category
Less than 12 Months, Fair Value	443	436
Less than 12 Months, gross Unrealized Losses	(14)	(8)
12 Months or Greater, Fair Value
12 Months or Greater ,Gross Unrealized Losses
Fair Value, Total	443	436
Gross Unrealized Losses, Total	(14)	(8)
Mortgage-backed and related securities
Summary of securities with gross unrealized losses, aggregated by investment category
Less than 12 Months, Fair Value	1	1
12 Months or Greater, Fair Value
12 Months or Greater ,Gross Unrealized Losses
Fair Value, Total	$ 1	$ 1