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CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Income Statement [Abstract]
Revenue	$ 98,596	$ 70,622
Cost of sales	23,788	17,730
Gross profit	74,808	52,892
Selling, general, and administrative	60,125	44,283
Income from operations	14,683	8,609
Other income (expense)
Interest and dividend income, net	249	63
Other income (expense)	(1)	39
Nonoperating income (expense)	248	102
Income from continuing operations before income taxes	14,931	8,711
Provision for income taxes on continuing operations	2,709	2,566
Net income	$ 12,222	$ 6,145
Basic earnings per share
Earnings Per Share, Basic	$ 1.02	$ 0.52
Diluted earnings per share
Earnings Per Share, Diluted	$ 1.01	$ 0.51
Weighted average shares outstanding -
Basic	12,030	11,901
Diluted	12,139	12,009
Cash dividends declared per share	$ 0.48	$ 0.32

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