Securities (Details 3) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012 item	Dec. 31, 2011 item
Fair Value
Less than 12 months	$ 48,897	$ 7,766
12 months or more		1,021
Total	48,897	8,787
Unrealized Losses
Less than 12 months	188	40
12 months or more		16
Total	188	56
Number of securities	14	5
Government sponsored enterprise obligations
Fair Value
Less than 12 months	29,996
Total	29,996
Unrealized Losses
Less than 12 months	56
Total	56
Mortgage-backed securities
Fair Value
Less than 12 months	16,609	5,122
Total	16,609	5,122
Unrealized Losses
Less than 12 months	120	23
Total	120	23
Obligations of states and political subdivisions
Fair Value
Less than 12 months	2,292	2,644
12 months or more		1,021
Total	2,292	3,665
Unrealized Losses
Less than 12 months	12	17
12 months or more		16
Total	$ 12	$ 33