CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (Unaudited) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Statement of Comprehensive Income [Abstract]
Net earnings		$ 80,072	$ 74,788	$ 135,665	$ 118,431
Other comprehensive income
Foreign currency translation, net of tax	[1]	540	(43,771)	8,782	(28,360)
Pension and postretirement adjustments, net of tax	[2]	1,749	3,062	3,432	5,684
Other comprehensive income (loss), net of tax		2,289	(40,709)	12,214	(22,676)
Comprehensive income		$ 82,361	$ 34,079	$ 147,879	$ 95,755

[1] The tax benefit included in other comprehensive loss for foreign currency translation adjustments for the three and six months ended June 30, 2018 was $2.0 million and $1.2 million, respectively.

[2] The tax expense included in other comprehensive income for pension and postretirement adjustments for the three and six months ended June 30, 2019 was $0.6 million and $1.1 million, respectively. The tax expense included in other comprehensive income for pension and postretirement adjustments for the three and six months ended June 30, 2018 was $0.9 million and $1.8 million, respectively.