CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Statement of Comprehensive Income [Abstract]
Net earnings		$ 201,392	$ 307,583	$ 275,749
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract]
Foreign currency translation, net of tax	[1]	41,282	18,447	(52,440)
Pension and postretirement adjustments, net of tax	[2]	(26,864)	(29,017)	(19,167)
Other Comprehensive Income (Loss), Net of Tax		14,418	(10,570)	(71,607)
Comprehensive Income		$ 215,810	$ 297,013	$ 204,142

[1] The tax benefit (expense) included in other comprehensive income for foreign currency translation adjustments for 2020, 2019, and 2018 was immaterial.

[2] The tax benefit included in other comprehensive income for pension and postretirement adjustments for 2020, 2019, and 2018 was $8.3 million, $8.5 million, and $7.0 million, respectively.