Investment Securities (Details Textual) (USD $)	9 Months Ended	12 Months Ended
	Sep. 30, 2014 Security Investment	Dec. 31, 2013 Security
Schedule Of Available For Sale Securities [Line Items]
Trading securities	$ 7,799,000	$ 7,247,000
Unrealized gains on trading securities	36,300	51,800
Unrealized losses on trading securities	3,400	3,100
Net unrealized gains (losses) on trading securities	32,900
Realized gains on trading securities	287,800
Carrying value of investment securities for pledge	111,100,000
Investment securities with fair value less than amortized cost	46	83
Minimum assets of trust preferred securities issued by institution	15,000,000,000
Amortized cost	164,893,000	165,219,000
Fair value	165,006,000	160,886,000
Non-accrual investment securities	785,000	1,200,000
Trust preferred securities in nonaccrual status	2
Estimated length of interest payment delays	10 years
iTruPS securities
Schedule Of Available For Sale Securities [Line Items]
Number of securities owned by company		9
Amortized cost		10,500,000
Fair value		8,500,000
Other than temporary impairment losses		$ 2,000,000