Summary of Significant Accounting Policies (Details 6) (USD $) In Thousands, unless otherwise specified			3 Months Ended
	Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2013 Unrealized Gains (Losses) on Securities Available for Sale
Changes in accumulated other comprehensive income (loss)
Balance at the beginning of the period	$ 46	$ 111	$ 111
Other comprehensive income (loss) before reclassifications			(62)
Amounts reclassified from accumulated other comprehensive income (loss)			(3)
Net current period other comprehensive income (loss)			(65)
Balance at the end of the period	$ 46	$ 111	$ 46