Income Taxes - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended
	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Income Tax Contingency [Line Items]
Effective tax rate (as a percent)	9.20%		54.00%	4.00%	69.70%
Valuation allowance activity	$ 500		$ 900	$ 700	$ 1,200
Employee benefit plans settlement expenses	0		25,515	385	25,515
Tax benefit related to employee benefit plan settlement expenses			$ 10,500		$ 10,500
Effective tax rate excluding pension plan settlement (as a percent)			22.70%		22.50%
Impairment charges	0	$ 61,109	$ 0	61,109	$ 0
Goodwill impairment		$ 48,671		$ 48,671
Foreign Tax Authority
Income Tax Contingency [Line Items]
Withholding tax liability benefit	$ 400