CONSOLIDATED CONDENSED STATEMENTS OF EARNINGS (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
CONSOLIDATED CONDENSED STATEMENTS OF EARNINGS (Unaudited) [Abstract]
Revenue	$ 341,397	$ 342,468
Cost of products sold	220,452	226,625
Selling and administrative expenses	96,908	68,324
Operating income	24,037	47,519
Interest expense	4,811	4,800
Earnings before income taxes	19,226	42,719
Income taxes	6,034	11,526
Earnings from continuing operations	13,192	31,193
Loss from discontinued operations, net of tax	0	(22)
Net earnings	$ 13,192	$ 31,171
Weighted average number of shares outstanding:
Basic (in shares)	44,202	44,718
Diluted (in shares)	44,479	44,981
Basic:
Continuing operations (in dollars per share)	$ 0.30	$ 0.70
Discontinued operations (in dollars per share)	0	0
Earnings per common share (in dollars per share)	0.30	0.70
Diluted:
Continuing operations (in dollars per share)	0.30	0.69
Discontinued operations (in dollars per share)	0	0
Earnings per common share (in dollars per share)	0.30	0.69
Dividends declared per common share (in dollars per share)	$ 0.30	$ 0.27