Stock Warrants (Narrative) (Details) (USD $)			12 Months Ended
	Jun. 30, 2013	Dec. 31, 2012	Dec. 31, 2008 US Department of Treasury Capital Purchase Program [Member]	Jul. 31, 2013 US Department of Treasury Capital Purchase Program [Member]
Class of Warrant or Right [Line Items]
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right			137,966
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right, Price Per Share			$ 19.57
Class of Warrant or Right, Termination Period			10 years
warrant at fair market value repurchased				$ 0
Warrant Issued In Conjunction With Serial Preferred Stock	400,000	400,000		400,000
APIC Increase				$ 350,000