Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Net Sales	$ 1,152,344	$ 1,097,702	$ 1,092,602
Cost of Sales	712,302	669,990	688,916
Gross Profit	440,042	427,712	403,686
Selling, General and Administrative Expenses	387,356	371,430	386,970
Operating Income	52,686	56,282	16,716
Other Nonoperating Expense		2,642	3,764
Other (Income) Expense	(104)
Income Before Income Taxes	52,790	53,640	12,952
Income Tax (Benefit) Expense	11,092	(7,787)	3,289
Net Income	$ 41,698	$ 61,427	$ 9,663
Net Income per Common Share-Basic	$ 1.44	$ 2.13	$ 0.34
Net Income per Common Share-Diluted	$ 1.41	$ 2.10	$ 0.34
Weighted Average Common Shares Outstanding:
Basic	29,041	28,830	28,689
Diluted	29,525	29,247	28,793
Product [Member]
Net Sales	$ 993,943	$ 974,829	$ 956,041
Cost of Sales	588,166	574,944	586,918
Net Services Sales
Net Sales	158,401	122,873	136,561
Cost of Sales	$ 124,136	$ 95,046	$ 101,998