Income Taxes - Provision for Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Income Tax Disclosure [Abstract]
Current income tax expense	$ 3,807	$ 95	$ 10,371	$ 3,107
Deferred income tax (benefit) expense	(146)	2,097	(4)	4,535
Income tax expense	$ 3,661	$ 2,192	$ 10,367	$ 7,642