Other Comprehensive Income (Loss) - Components of Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss)	$ 31,332	$ 20,756	$ (15,698)	$ (2,210)
Cumulative translation adjustment
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total other comprehensive income (loss), Pre-tax	20,255	19,271	(28,184)	(7,185)
Total other comprehensive income (loss), Tax	0	0	0	0
Other comprehensive income (loss)	20,255	19,271	(28,184)	(7,185)
Pension and other postretirement adjustments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total other comprehensive income (loss), Pre-tax	12,009	(569)	13,063	2,305
Total other comprehensive income (loss), Tax	(2,799)	(62)	(3,108)	(640)
Other comprehensive income (loss)	9,210	(631)	9,955	1,665
Reclassification adjustments for derivatives
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total other comprehensive income (loss), Pre-tax	2,416	2,739	3,275	4,284
Total other comprehensive income (loss), Tax	(549)	(623)	(744)	(974)
Other comprehensive income (loss)	1,867	2,116	2,531	3,310
AOCI
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total other comprehensive income (loss), Pre-tax	34,680	21,441	(11,846)	(596)
Total other comprehensive income (loss), Tax	(3,348)	(685)	(3,852)	(1,614)
Other comprehensive income (loss)	$ 31,332	$ 20,756	$ (15,698)	$ (2,210)