Investment Securities (Details 2) (USD $) In Thousands, unless otherwise specified	6 Months Ended	12 Months Ended
	Jun. 30, 2013 Investment	Dec. 31, 2012 Investment
Summary of gross unrealized losses on investment securities and fair market value of related securities
Number of investments, Less than 12 months	41	20
Available-for-sale Securities, Less than 12 months, Fair Value	$ 41,392	$ 16,063
Available-for-sale Securities, Less than 12 Months, Unrealized losses	1,666	77
Number of investments, 12 months or longer
Available-for-sale Securities, 12 months or longer, Fair Value
Available-for-sale Securities, 12 Months or Longer, Unrealized losses
Number of investments, Total	41	20
Available-for-sale Securities, Fair Value, Total	41,392	16,063
Available-for-sale Securities, Unrealized Losses, Total	1,666	77
US Government agencies [Member]
Summary of gross unrealized losses on investment securities and fair market value of related securities
Number of investments, Less than 12 months	2	1
Available-for-sale Securities, Less than 12 months, Fair Value	7,314	3,771
Available-for-sale Securities, Less than 12 Months, Unrealized losses	468	10
Number of investments, 12 months or longer
Available-for-sale Securities, 12 months or longer, Fair Value
Available-for-sale Securities, 12 Months or Longer, Unrealized losses
Number of investments, Total	2	1
Available-for-sale Securities, Fair Value, Total	7,314	3,771
Available-for-sale Securities, Unrealized Losses, Total	468	10
SBA securities [Member]
Summary of gross unrealized losses on investment securities and fair market value of related securities
Number of investments, Less than 12 months	2	1
Available-for-sale Securities, Less than 12 months, Fair Value	5,581	2,015
Available-for-sale Securities, Less than 12 Months, Unrealized losses	323	5
Number of investments, 12 months or longer
Available-for-sale Securities, 12 months or longer, Fair Value
Available-for-sale Securities, 12 Months or Longer, Unrealized losses
Number of investments, Total	2	1
Available-for-sale Securities, Fair Value, Total	5,581	2,015
Available-for-sale Securities, Unrealized Losses, Total	323	5
States and Political Subdivisions [Member]
Summary of gross unrealized losses on investment securities and fair market value of related securities
Number of investments, Less than 12 months	29	16
Available-for-sale Securities, Less than 12 months, Fair Value	11,810	6,608
Available-for-sale Securities, Less than 12 Months, Unrealized losses	526	48
Number of investments, 12 months or longer
Available-for-sale Securities, 12 months or longer, Fair Value
Available-for-sale Securities, 12 Months or Longer, Unrealized losses
Number of investments, Total	29	16
Available-for-sale Securities, Fair Value, Total	11,810	6,608
Available-for-sale Securities, Unrealized Losses, Total	526	48
Mortgage Backed Securities [Member]
Summary of gross unrealized losses on investment securities and fair market value of related securities
Number of investments, Less than 12 months	8	2
Available-for-sale Securities, Less than 12 months, Fair Value	16,687	3,669
Available-for-sale Securities, Less than 12 Months, Unrealized losses	349	14
Number of investments, 12 months or longer
Available-for-sale Securities, 12 months or longer, Fair Value
Available-for-sale Securities, 12 Months or Longer, Unrealized losses
Number of investments, Total	8	2
Available-for-sale Securities, Fair Value, Total	16,687	3,669
Available-for-sale Securities, Unrealized Losses, Total	$ 349	$ 14