Consolidated Condensed Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Statement of Comprehensive Income [Abstract]
Net earnings	$ 85,159	$ 75,385	$ 137,948	$ 123,645
Other comprehensive income (loss):
Changes in cumulative translation adjustment and other	27,027	26,273	(30,345)	11,681
Amortization of pension and postretirement items	6,834	4,295	13,892	9,328
Income tax expense related to amortization of pension and postretirement items	(2,366)	(1,302)	(4,814)	(3,208)
Amortization of pension and postretirement items, net of taxes	4,468	2,993	9,078	6,120
Change in net actuarial loss	(8,526)	(3,144)	(8,526)	(3,144)
Income tax benefit related to change in net actuarial loss	3,205	1,096	3,205	1,096
Change in net actuarial loss, net of taxes	(5,321)	(2,048)	(5,321)	(2,048)
Other comprehensive income (loss), net of taxes	26,174	27,218	(26,588)	15,753
Comprehensive income	$ 111,333	$ 102,603	$ 111,360	$ 139,398