Income Taxes - Narrative (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]
Effective tax rate (as a percent)	35.10%	25.10%	97.00%	17.50%
Income tax (benefit) expense	$ 1,574	$ 2,076	$ (5,519)	$ 5,854
Tax benefit related to the pension plan settlement			$ 10,500
Effective tax rate excluding pension plan settlement tax benefit (as a percent)			25.20%
Valuation allowance activity			$ 1,800