Condensed Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Statement of Comprehensive Income [Abstract]
Net (loss) income	$ 11,389	$ (3,125)	$ (200,423)	$ 17,913
Other comprehensive income (loss), net of tax:
Foreign currency translation, net of tax of $1,621, $(655), $(91) and $(1,078), respectively	22,676	(27,962)	5,040	(6,584)
Net unrealized (loss) gain on cash flow hedges, net of tax of $(317), $51, $(796) and $27, respectively	(957)	149	(2,402)	78
Net unrealized (loss) gain on investment securities, net of tax of $(2,716), $509, $(1,816) and $2,573, respectively	(8,191)	1,487	(5,476)	7,516
Amortization of pension and postretirement costs, net of tax benefits of 2,875, 2,633, 9,027 and 7,406, respectively	9,162	7,552	29,409	21,499
Other comprehensive income (loss), net of tax	22,690	(18,774)	26,571	22,509
Comprehensive income (loss)	$ 34,079	$ (21,899)	$ (173,852)	$ 40,422