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CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Income Statement [Abstract]
Revenue	$ 75,729	$ 71,144	$ 146,351	$ 143,489
Cost of sales	18,118	17,919	35,848	37,070
Gross profit	57,611	53,225	110,503	106,419
Selling, general, and administrative	46,301	48,201	90,584	95,127
Income from operations	11,310	5,024	19,919	11,292
Other income (expense)
Interest and dividend income, net	141	65	204	180
Other income (expense)	(3)	3	36	(21)
Nonoperating income (expense)	138	68	240	159
Income from operations before income taxes	11,448	5,092	20,159	11,451
Provision for income taxes	3,864	1,695	6,430	3,794
Net income	$ 7,584	$ 3,397	$ 13,729	$ 7,657
Basic earnings (loss) per share
Earnings per share - basic	$ 0.64	$ 0.29	$ 1.15	$ 0.65
Diluted earnings (loss) per share
Earnings per share - diluted	$ 0.63	$ 0.29	$ 1.14	$ 0.64
Weighted average shares outstanding -
Basic	11,929	11,811	11,915	11,817
Diluted	12,056	11,884	12,044	11,891
Cash dividends declared per share	$ 0.32	$ 0.25	$ 0.64	$ 0.50

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