Related Party Transactions (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Related Party Transaction [Line Items]
Related parties indebted amount for loans	$ 19,200	$ 10,800
Total principal additions	320
Total principal payments and changes in related party debt	412
Amount due to related parties	650
Directors And Officers [Member]
Related Party Transaction [Line Items]
Amount due to related parties	$ 88,200	$ 35,600