Troubled Debt Restructurings (Details Textual) $ in Thousands	9 Months Ended
	Sep. 30, 2017 USD ($) Investment	Dec. 31, 2016 USD ($) Investment	Sep. 30, 2016 USD ($)
Troubled Debt Restructurings (Textual)
Total number of loans classified under troubled debt restructurings (TDRs) | Investment	19	17
Total sum of loans classified as troubled debt restructurings (TDRs)	$ 7,700	$ 6,700
Number of months previous loan payment defaulted	12 months
Recorded investment			$ 30,000