Securities (Details 3) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	$ 36,229	$ 39,274
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value, Total	36,229	39,274
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses	(280)	(337)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Aggregate Losses
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses, Total	(280)	(337)
U.S. Government agencies and corporations [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	9,999	9,999
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value, Total	9,999	9,999
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses	(1)	(1)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Aggregate Losses
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses, Total	(1)	(1)
Mortgage backed securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	25,827	25,606
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value, Total	25,827	25,606
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses	(278)	(292)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Aggregate Losses
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses, Total	(278)	(292)
State and political subdivisions [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	403	3,669
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value, Total	403	3,669
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses	(1)	(44)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Aggregate Losses
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses, Total	$ (1)	$ (44)