Condensed Consolidated Statements of Earnings (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Net Sales	$ 219,084	$ 200,238	$ 403,063	$ 368,330
Cost of Sales	123,821	112,497	230,883	208,066
Gross Profit	95,263	87,741	172,180	160,264
Operating Expense:
Research and Development Expense	7,651	7,821	15,132	15,339
Selling and Administrative Expense	64,471	58,298	124,670	116,420
Total Operating Expense	72,122	66,119	139,802	131,759
Profit from Operations	23,141	21,622	32,378	28,505
Other Income (Expense):
Interest Income	95	114	170	228
Interest Expense	(419)	(411)	(905)	(878)
Net Foreign Currency Transaction Gains (Losses)	328	(419)	120	(743)
Other Expense, Net	(89)	(87)	(120)	(81)
Total Other Expense, Net	(85)	(803)	(735)	(1,474)
Profit Before Income Taxes	23,056	20,819	31,643	27,031
Income Tax Expense	7,533	6,565	10,325	7,718
Net Earnings	$ 15,523	$ 14,254	$ 21,318	$ 19,313
Earnings per Share:
Basic	$ 0.85	$ 0.78	$ 1.17	$ 1.06
Diluted	$ 0.83	$ 0.76	$ 1.14	$ 1.03
Weighted Average Shares Outstanding:
Basic	18,167,054	18,253,326	18,242,240	18,298,379
Diluted	18,675,607	18,787,880	18,776,369	18,835,542
Cash Dividend Declared per Common Share	$ 0.20	$ 0.18	$ 0.38	$ 0.36