Income Taxes (Details Textual) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Income Tax Disclosure [Abstract]
Income tax expense	$ 1,730	$ 1,992
Effective income tax rate	39.70%	32.80%
Increase in provisional estimate of one-time transition tax related to Tax Act	$ 900
Increase in provisional estimate of one-time transition tax related to Tax Act, percent	19.70%
Effective income tax rate, excluding discrete items	25.90%