Securities (Details 2) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012 Securities	Dec. 31, 2011 Securities
Securities Available for Sale
Number of Security Positions with Unrealized losses	4	8
Continuous Unrealized Losses Existing for Less than 12 Months, Market Value	$ 7,347	$ 10,989
Continuous Unrealized Losses Existing for Less than 12 Months, Unrealized Losses	(52)	(93)
Continuous Unrealized Losses Existing for 12 Months or Longer, Market Value
Continuous Unrealized Losses Existing for 12 Months or Longer, Unrealized Losses
Total, Market Value	7,347	10,989
Total Unrealized Losses	(52)	(93)
Collateralized mortgage obligations [Member]
Securities Available for Sale
Number of Security Positions with Unrealized losses	3	7
Continuous Unrealized Losses Existing for Less than 12 Months, Market Value	4,340	10,019
Continuous Unrealized Losses Existing for Less than 12 Months, Unrealized Losses	(22)	(90)
Continuous Unrealized Losses Existing for 12 Months or Longer, Market Value
Continuous Unrealized Losses Existing for 12 Months or Longer, Unrealized Losses
Total, Market Value	4,340	10,019
Total Unrealized Losses	(22)	(90)
Asset-backed securities [Member]
Securities Available for Sale
Number of Security Positions with Unrealized losses	1
Continuous Unrealized Losses Existing for Less than 12 Months, Market Value	3,007
Continuous Unrealized Losses Existing for Less than 12 Months, Unrealized Losses	(30)
Continuous Unrealized Losses Existing for 12 Months or Longer, Market Value
Continuous Unrealized Losses Existing for 12 Months or Longer, Unrealized Losses
Total, Market Value	3,007
Total Unrealized Losses	(30)
Mortgage-backed securities [Member]
Securities Available for Sale
Number of Security Positions with Unrealized losses		1
Continuous Unrealized Losses Existing for Less than 12 Months, Market Value		970
Continuous Unrealized Losses Existing for Less than 12 Months, Unrealized Losses		(3)
Continuous Unrealized Losses Existing for 12 Months or Longer, Market Value
Continuous Unrealized Losses Existing for 12 Months or Longer, Unrealized Losses
Total, Market Value		970
Total Unrealized Losses		$ (3)