Condensed Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Statement of Comprehensive Income [Abstract]
Net loss	$ 19,856	$ (3,329)	$ (11,685)	$ (211,812)
Other comprehensive income, net of tax:
Foreign currency translation, net of tax of $309, $1,105, $297 and $(1,712), respectively	3,509	10,099	(10,749)	(17,636)
Net unrealized (loss) gain on cash flow hedges, net of tax of $(466), $(421), $1,135 and $(479), respectively	(1,406)	(1,271)	3,424	(1,445)
Net unrealized gain (loss) on investment securities, net of tax of $1,306, $467, $(1,650) and $900, respectively	3,939	1,407	(4,977)	2,715
Amortization of pension and postretirement costs, net of tax of $3,303, $3,502, $6,511 and $6,152, respectively	10,193	11,377	20,130	20,247
Other comprehensive income, net of tax	16,235	21,612	7,828	3,881
Comprehensive income (loss)	$ 36,091	$ 18,283	$ (3,857)	$ (207,931)