Fair Value of Financial Instruments (Details 2) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Mar. 31, 2016
Business Acquisition [Line Items]
Other revenue	$ 916	$ 34	$ (258)
Woodway Financial Advisors
Business Acquisition [Line Items]
Contingent consideration				$ 9,300