CONSOLIDATED CONDENSED STATEMENTS OF EARNINGS (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
CONSOLIDATED CONDENSED STATEMENTS OF EARNINGS (Unaudited) [Abstract]
Revenue	$ 344,533	$ 364,504	$ 1,036,768	$ 1,105,002
Cost of products sold	231,761	243,003	688,408	729,597
Selling and administrative expenses	69,552	85,407	213,627	280,981
Operating income	43,220	36,094	134,733	94,424
Interest expense	4,295	4,016	12,316	11,866
Earnings (loss) before income taxes	38,925	32,078	122,417	82,558
Income taxes	11,287	9,414	34,502	27,116
Earnings from continuing operations	27,638	22,664	87,915	55,442
Loss from discontinued operations, net of tax	(47)	(1,359)	(348)	(7,151)
Net earnings	$ 27,591	$ 21,305	$ 87,567	$ 48,291
Weighted average number of shares outstanding:
Basic (in shares)	45,392	47,902	46,239	48,799
Diluted (in shares)	45,675	48,230	46,543	49,080
Basic:
Continuing operations (in dollars per share)	$ 0.61	$ 0.47	$ 1.90	$ 1.14
Discontinued operations (in dollars per share)	0	(0.03)	(0.01)	(0.15)
Earnings per common share (in dollars per share)	0.61	0.44	1.89	0.99
Diluted:
Continuing operations (in dollars per share)	0.61	0.47	1.89	1.13
Discontinued operations (in dollars per share)	0	(0.03)	(0.01)	(0.15)
Earnings per common share (in dollars per share)	0.60	0.44	1.88	0.98
Dividends declared per common share (in dollars per share)	$ 0.27	$ 0.25	$ 0.77	$ 0.73