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Consolidated Condensed Statements of Comprehensive Income (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Statement of Comprehensive Income [Abstract]
Net sales	$ 214,010	$ 218,378
Cost of sales	94,851	96,940
Gross profit	119,159	121,438
Selling and administrative expense	95,867	99,226
Research and development expense	10,120	10,575
Operating expenses	105,987	109,801
Income from operations	13,172	11,637
Interest expense	9,592	9,369
Other expense	89	4,225
Income (loss) before income taxes	3,491	(1,957)
Benefit from income taxes	(2,436)	(2,978)
Net income	5,927	1,021
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	$ (1,121)	$ 1,096
Per share data:
Basic (in dollars per share)	$ 0.21	$ 0.04
Diluted (in dollars per share)	$ 0.20	$ 0.04
Weighted average common shares:
Basic (shares)	28,478	28,173
Diluted (shares)	29,707	29,034

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