Consolidated Statements of Earnings (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Consolidated Statements of Earnings [Abstract]
Net Sales	$ 752,011	$ 738,980	$ 753,998
Cost of Sales	426,103	413,684	434,817
Gross Profit	325,908	325,296	319,181
Operating Expense:
Research and Development Expense	30,529	29,263	27,911
Selling and Administrative Expense	232,976	234,114	241,625
Gain on Sale of Business	0	(784)	0
Total Operating Expense	263,505	262,593	269,536
Profit from Operations	62,403	62,703	49,645
Other Income (Expense):
Interest Income	390	1,069	752
Interest Expense	(1,761)	(2,517)	(2,238)
Net Foreign Currency Transaction (Losses) Gains	(671)	(1,403)	559
Other (Expense) Income, Net	(483)	38	12
Total Other Expense, Net	(2,525)	(2,813)	(915)
Profit Before Income Taxes	59,878	59,890	48,730
Income Tax Expense	19,647	18,306	16,017
Net Earnings	$ 40,231	$ 41,584	$ 32,713
Net Earnings per Share:
Basic	$ 2.20	$ 2.24	$ 1.74
Diluted	$ 2.14	$ 2.18	$ 1.69
Weighted Average Shares Outstanding:
Basic	18,297,371	18,544,896	18,832,693
Diluted	18,833,453	19,102,016	19,360,428
Cash Dividends Declared per Common Share	$ 0.72	$ 0.69	$ 0.68