Condensed Consolidated Statements of Earnings (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Net Sales	$ 202,643	$ 188,541	$ 605,706	$ 556,871
Cost of Sales	115,480	106,679	346,363	314,745
Gross Profit	87,163	81,862	259,343	242,126
Operating Expense:
Research and Development Expense	6,844	7,970	21,976	23,309
Selling and Administrative Expense	63,215	57,663	187,885	174,083
Total Operating Expense	70,059	65,633	209,861	197,392
Profit from Operations	17,104	16,229	49,482	44,734
Other Income (Expense):
Interest Income	84	67	254	295
Interest Expense	(396)	(440)	(1,301)	(1,318)
Net Foreign Currency Transaction Losses	(276)	(303)	(156)	(1,046)
Other Expense, Net	(162)	(157)	(282)	(238)
Total Other Expense, Net	(750)	(833)	(1,485)	(2,307)
Profit Before Income Taxes	16,354	15,396	47,997	42,427
Income Tax Expense	4,562	4,779	14,887	12,497
Net Earnings	$ 11,792	$ 10,617	$ 33,110	$ 29,930
Earnings per Share:
Basic	$ 0.65	$ 0.58	$ 1.82	$ 1.64
Diluted	$ 0.63	$ 0.56	$ 1.77	$ 1.59
Weighted Average Shares Outstanding:
Basic	18,120,729	18,267,828	18,201,291	18,288,083
Diluted	18,635,287	18,811,638	18,727,818	18,823,745
Cash Dividend Declared per Common Share	$ 0.20	$ 0.18	$ 0.58	$ 0.54