CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (Unaudited) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Statement of Comprehensive Income [Abstract]
Net earnings		$ 61,408	$ 31,018	$ 120,877	$ 82,779
Other comprehensive income
Foreign currency translation, net of tax	[1]	7,243	24,185	3,283	(26,090)
Pension and postretirement adjustments, net of tax	[2]	4,442	4,002	10,042	8,683
Other comprehensive income (loss), net of tax		11,685	28,187	13,325	(17,407)
Comprehensive income		$ 73,093	$ 59,205	$ 134,202	$ 65,372

[1] The tax benefit included in foreign currency translation adjustments for the three and six months ended June 30, 2021 and June 30, 2020 was immaterial.

[2] The tax expense included in pension and postretirement adjustments for the three and six months ended June 30, 2021 was $1.5 million and $3.1 million, respectively. The tax expense included in pension and postretirement adjustments for the three and six months ended June 30, 2020 was $1.3 million and $2.7 million, respectively.