Income Tax (Details 2) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Summary of income tax expense
Current	$ 387	$ 1,853	$ 2,377	$ 4,737
Deferred		(945)	(2,388)	(1,706)
Income tax expense	$ 387	$ 908	$ 2,667	$ 2,949