CONDENSED CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
CONDENSED CONSOLIDATED STATEMENTS OF INCOME
Revenue	$ 219,999	$ 187,103	$ 398,460	$ 352,979
Cost of sales	60,699	46,393	103,920	87,122
Gross profit	159,300	140,710	294,540	265,857
Selling, general, and administrative	131,201	113,355	242,908	213,787
Income from operations	28,099	27,355	51,632	52,070
Other income (expense)
Interest income, net	58	425	168	737
Other expense	1	(2)	(18)	(8)
Other income (expense)	59	423	150	729
Income from operations before income taxes	28,158	27,778	51,782	52,799
Provision for income taxes	6,223	6,395	11,370	10,666
Net income	$ 21,935	$ 21,383	$ 40,412	$ 42,133
Basic earnings per share
Earnings per share - basic	$ 1.86	$ 1.80	$ 3.43	$ 3.55
Diluted earnings per share
Earnings per share - diluted	$ 1.86	$ 1.75	$ 3.42	$ 3.45
Weighted average shares outstanding -
Basic	11,777	11,861	11,774	11,870
Diluted	11,821	12,218	11,822	12,229
Cash dividends declared per share	$ 1.13	$ 0.75	$ 2.26	$ 1.50