Fair Value Measurement (Narrative) (Details) (USD $)	3 Months Ended	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2012
Fair Value Measurement [Abstract]
Other Company Stock Owned Fair Value Discount Percentage		5.00%
Carrying value of loans fully charged-off		$ 0
Transfer of trading securities from Level 1 to Level 2 measurements	$ 0	$ 767,000