CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Statement of Comprehensive Income [Abstract]
Net earnings		$ 275,749	$ 214,891	$ 187,329
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract]
Foreign currency translation, net of tax	[1]	(52,440)	77,942	(64,840)
Pension and postretirement adjustments, net of tax	[2]	(19,167)	(3,026)	(988)
Other Comprehensive Income (Loss), Net of Tax		(71,607)	74,916	(65,828)
Comprehensive Income		$ 204,142	$ 289,807	$ 121,501

[1] The tax benefit (expense) included in other comprehensive income for foreign currency translation adjustments for 2018, 2017, and 2016 were $0.8 million, ($1.9) million, and $1.7 million, respectively.

[2] The tax benefit (expense) included in other comprehensive income for pension and postretirement adjustments for 2018, 2017, and 2016 were $7.0 million, $2.8 million, and ($1.7) million, respectively.