Benefit Plans (Details Textual) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Compensation and Retirement Disclosure [Abstract]
Required period of service	30 days
Contribution to 401(k)	$ 1.2	$ 1.0	$ 1.0