Revenue from Contracts with Customer (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Revenue from Contract with Customer [Abstract]
Brokerage revenue	$ 4,194	$ 4,122
Other Income, Merchant Fee Income	841	962
Other Income, Credit Card And Interchange	$ 1,700	$ 1,500