CONSOLIDATED CONDENSED STATEMENTS OF EARNINGS (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
CONSOLIDATED CONDENSED STATEMENTS OF EARNINGS (Unaudited) [Abstract]
Revenue	$ 342,468	$ 346,226
Cost of products sold	226,625	228,793
Selling and administrative expenses	68,324	70,987
Operating income	47,519	46,446
Interest expense	4,800	3,915
Earnings before income taxes	42,719	42,531
Income taxes	11,526	11,796
Earnings from continuing operations	31,193	30,735
Loss from discontinued operations, net of tax	(22)	(209)
Net earnings	$ 31,171	$ 30,526
Weighted average number of shares outstanding:
Basic (in shares)	44,718	47,178
Diluted (in shares)	44,981	47,502
Basic:
Continuing operations (in dollars per share)	$ 0.70	$ 0.65
Discontinued operations (in dollars per share)	0	0
Earnings per common share (in dollars per share)	0.70	0.65
Diluted:
Continuing operations (in dollars per share)	0.69	0.65
Discontinued operations (in dollars per share)	0	0
Earnings per common share (in dollars per share)	0.69	0.64
Dividends declared per common share (in dollars per share)	$ 0.27	$ 0.25