Accumulated Other Comprehensive (Loss) Income - Summary of Amounts Reclassified (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Employee benefit costs:
Miscellaneous loss, net	$ (908)	$ (866)
(Loss) income from continuing operations before income taxes	(41,996)	3,212
Income tax benefit	2,188	4,778
Net (loss) income	(39,808)	6,815
Amounts reclassified from accumulated other comprehensive (loss) income | Amortization of actuarial loss (1)
Employee benefit costs:
Miscellaneous loss, net	794	239
Amounts reclassified from accumulated other comprehensive (loss) income | Settlement (1)
Employee benefit costs:
Miscellaneous loss, net	1,200	0
Amounts reclassified from accumulated other comprehensive (loss) income | Employee benefit costs
Employee benefit costs:
(Loss) income from continuing operations before income taxes	1,994	239
Income tax benefit	0	(62)
Net (loss) income	$ 1,994	$ 177