Income Taxes - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Income Tax Contingency [Line Items]
Effective tax rate (as a percent)	16.60%		35.10%	6.30%	97.00%
Valuation allowance activity	$ 2,000			$ 2,700	$ 1,800
Income tax benefit	2,334		$ (1,574)	4,944	5,519
Tax benefit related to employee benefit plan settlement expenses					$ 10,500
Effective tax rate excluding pension plan settlement (as a percent)					25.20%
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	$ 800