Income Taxes - Provision for Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Current tax expense	$ 6,125	$ 4,279	$ 5,153
Deferred tax expense	882	1,741	49
Total income tax expense	$ 7,007	$ 6,020	$ 5,202