CONSOLIDATED CONDENSED STATEMENTS OF EARNINGS (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
CONSOLIDATED CONDENSED STATEMENTS OF EARNINGS (Unaudited) [Abstract]
Revenue	$ 360,836	$ 346,009	$ 703,304	$ 692,235
Cost of products sold	236,402	227,854	463,027	456,647
Selling and administrative expenses	80,769	73,088	149,093	144,075
Operating income	43,665	45,067	91,184	91,513
Interest expense	4,637	4,106	9,437	8,021
Earnings before income taxes	39,028	40,961	81,747	83,492
Income taxes	14,277	11,419	25,803	23,215
Earnings from continuing operations	24,751	29,542	55,944	60,277
Gain (Loss) from discontinued operations, net of tax	3,365	(92)	3,343	(301)
Net earnings	$ 28,116	$ 29,450	$ 59,287	$ 59,976
Weighted average number of shares outstanding:
Basic (in shares)	44,562	46,168	44,640	46,670
Diluted (in shares)	44,822	46,470	44,902	46,984
Basic:
Continuing operations (in dollars per share)	$ 0.56	$ 0.64	$ 1.25	$ 1.29
Discontinued operations (in dollars per share)	0.08	0	0.07	(0.01)
Earnings per common share (in dollars per share)	0.63	0.64	1.33	1.29
Diluted:
Continuing operations (in dollars per share)	0.55	0.64	1.25	1.28
Discontinued operations (in dollars per share)	0.08	0	0.07	(0.01)
Earnings per common share (in dollars per share)	0.63	0.63	1.32	1.28
Dividends declared per common share (in dollars per share)	$ 0.27	$ 0.25	$ 0.54	$ 0.50