Income Taxes - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Income Tax Disclosure [Abstract]
Income tax expense (benefit)	$ 947	$ (61)	$ (442)	$ 1,401
Income tax expense increase (decrease)			$ (1,800)
Effective tax rate	36.80%	(5.90%)	11.30%	15.60%
Effective tax rate, increase for period (as a percent)			4.30%