Condensed Consolidated Statements of Comprehensive (Loss) Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 9,067	$ 11,389	$ (2,618)	$ (200,423)
Other comprehensive (loss) income, net of tax:
Foreign currency translation, net of tax of $(1,062), $1,621, $(765) and $(91), respectively	(18,175)	22,676	(28,924)	5,040
Net unrealized gain (loss) on cash flow hedges, net of tax of $17, $(317), $1,152 and $(796), respectively	50	(957)	3,474	(2,402)
Net unrealized loss on investment securities, net of tax of $(467), $(2,716), $(2,117) and $(1,816), respectively	(1,408)	(8,191)	(6,385)	(5,476)
Amortization of pension and postretirement costs, net of tax of $3,097, $2,875, $9,608 and $9,027, respectively	9,606	9,162	29,736	29,409
Other comprehensive (loss) income, net of tax	(9,927)	22,690	(2,099)	26,571
Comprehensive (loss) income	$ (860)	$ 34,079	$ (4,717)	$ (173,852)