Consolidated Condensed Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Statement of Comprehensive Income [Abstract]
Net earnings	$ 55,794	$ 52,789
Other comprehensive income (loss):
Changes in cumulative translation adjustment and other	13,684	(57,372)
Amortization of pension and postretirement items	7,423	7,058
Income tax expense related to amortization of pension and postretirement items	(2,708)	(2,448)
Amortization of pension and postretirement items, net of tax	4,715	4,610
Other comprehensive income (loss), net of taxes	18,399	(52,762)
Comprehensive income	$ 74,193	$ 27