Investment Securities (Details Textual) (USD $)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011	Dec. 31, 2011
Investment Securities (Textual) [Abstract]
Proceeds from sale of investments			$ 8,000	$ 27,205,000	$ 27,200,000
Gross Realized Gain from Sale of Investment	0	(9,000)	1,000	1,267,000	1,300,000
Unrealized Loss From Investment less than 12 months	2,993,000		2,993,000		6,994,000
Unrealized Loss From Investment More than 12 months	44,000		44,000		52,000
Investment Securities Pledged	$ 10,000,000		$ 10,000,000		$ 13,700,000