Consolidated Condensed Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Statement of Comprehensive Income [Abstract]
Net earnings	$ 90,619	$ 83,617	$ 228,567	$ 207,262
Other comprehensive loss:
Changes in cumulative translation adjustment and other	(42,748)	(46,879)	(73,093)	(35,198)
Amortization of pension and postretirement items	6,873	4,658	20,765	13,986
Income tax expense related to amortization of pension and postretirement items	(2,412)	(1,603)	(7,226)	(4,811)
Amortization of pension and postretirement items, net of taxes	4,461	3,055	13,539	9,175
Change in net actuarial loss	0	(148)	(8,526)	(3,292)
Income tax benefit related to change in net actuarial loss	0	44	3,205	1,140
Change in net actuarial loss, net of taxes	0	(104)	(5,321)	(2,152)
Other comprehensive loss, net of taxes	(38,287)	(43,928)	(64,875)	(28,175)
Comprehensive income	$ 52,332	$ 39,689	$ 163,692	$ 179,087