Income Taxes - Valuation Allowance Evaluation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Income Taxes
Period for which prior cumulative losses considered in assessing the realization of deferred tax assets	2 years
Valuation allowance	$ 0	$ 2,527
Deferred tax assets, net	$ 6,907	$ 4,594