CONSOLIDATED CONDENSED STATEMENTS OF EARNINGS (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
CONSOLIDATED CONDENSED STATEMENTS OF EARNINGS (Unaudited) [Abstract]
Revenue	$ 349,662	$ 344,533	$ 1,052,966	$ 1,036,768
Cost of products sold	227,099	231,761	690,126	688,408
Selling and administrative expenses	71,412	69,552	220,505	213,627
Operating income	51,151	43,220	142,335	134,733
Interest expense	4,584	4,295	14,021	12,316
Earnings before income taxes	46,567	38,925	128,314	122,417
Income taxes	10,948	11,287	36,751	34,502
Earnings from continuing operations	35,619	27,638	91,563	87,915
Gain (Loss) from discontinued operations, net of tax	0	(47)	3,343	(348)
Net earnings	$ 35,619	$ 27,591	$ 94,906	$ 87,567
Weighted average number of shares outstanding:
Basic (in shares)	44,532	45,392	44,604	46,239
Diluted (in shares)	44,816	45,675	44,873	46,543
Basic:
Continuing operations (in dollars per share)	$ 0.80	$ 0.61	$ 2.05	$ 1.90
Discontinued operations (in dollars per share)	0	0	0.07	(0.01)
Earnings per common share (in dollars per share)	0.80	0.61	2.13	1.89
Diluted:
Continuing operations (in dollars per share)	0.79	0.61	2.04	1.89
Discontinued operations (in dollars per share)	0	0	0.07	(0.01)
Earnings per common share (in dollars per share)	0.79	0.60	2.11	1.88
Dividends declared per common share (in dollars per share)	$ 0.27	$ 0.27	$ 0.81	$ 0.77