CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Statement of Comprehensive Income [Abstract]
Net earnings (loss)	$ 50,825	$ (109,613)
Other comprehensive income (loss):
Changes in cumulative translation adjustment and unrealized losses from cash flow hedges	8,940	(84,620)
Amortization of pension and postretirement items	7,016	7,779
Income tax expense related to amortization of pension and postretirement items	(1,518)	(1,613)
Amortization of pension and postretirement items, net of taxes	5,498	6,166
Other comprehensive income (loss), net of taxes	14,438	(78,454)
Comprehensive income (loss)	$ 65,263	$ (188,067)