Fair Value Measurements (Details 1) (Fair Value, Measurements, Recurring [Member], Fair Value, Inputs, Level 3 [Member], USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2012
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Summary of Activity of Securities Available for Sale Which Are Measured at Fair Value on a Recurring Basis Using Significant Unobservable (Level 3) Inputs
Balance Beginning	$ 2,232
Net maturities and calls	(240)
Transfers into Level 3
Purchases
Net unrealized losses included in other comprehensive income (loss)	(36)
Balance Ending	$ 1,956