Income Taxes - Provision for Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Current tax expense	$ 3,793	$ 5,090	$ 7,355
Deferred tax expense	1,068	556	724
Deferred tax asset adjustment for tax rate change	0	0	2,747
Total income tax expense	$ 4,861	$ 5,646	$ 10,826