Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
OPERATING ACTIVITIES
Net Earnings	$ 32,088	$ 50,651	$ 40,231
Adjustments to Reconcile Net Earnings to Cash Provided by Operating Activities:
Depreciation	16,550	17,694	17,686
Amortization	1,481	2,369	2,560
Impairment of Long-Lived Assets	11,199	0	0
Deferred Income Taxes	(1,129)	129	5,622
Share-Based Compensation Expense	8,222	7,314	6,116
Allowance for Doubtful Accounts and Returns	1,089	1,504	1,279
Other, Net	(100)	24	219
Changes in Operating Assets and Liabilities
Receivables, Net	4,547	(18,811)	(7,618)
Inventories	(10,190)	(21,155)	(11,967)
Accounts Payable	(10,455)	10,192	6,120
Employee Compensation and Benefits	716	1,927	(4,178)
Other Current Liabilities	(402)	2,782	5,552
Income Taxes	(4,283)	3,466	(248)
Other Assets and Liabilities	(4,101)	1,276	(1,560)
Net Cash Provided by Operating Activities	45,232	59,362	59,814
INVESTING ACTIVITIES
Purchases of Property, Plant and Equipment	(24,780)	(19,583)	(14,775)
Proceeds form Disposals of Property, Plant and Equipment	336	291	120
Acquisition of Businesses, Net of Cash Acquired	0	0	(750)
Proceeds from Sale of Business	1,185	1,416	4,261
(Increase) Decrease in Restricted Cash	(322)	6	(253)
Net Cash Used for Investing Activities	(23,581)	(17,870)	(11,397)
FINANCING ACTIVITIES
Short-Term Debt Borrowings	0	0	1,500
Payments of Short-term Debt	0	(1,500)	0
Payments of Long-Term Debt	(3,445)	(2,016)	(1,096)
Purchases of Common Stock	(45,998)	(14,097)	(22,157)
Proceeds from Issuances of Common Stock	1,677	2,269	8,313
Excess Tax Benefit on Stock Plans	859	1,793	5,178
Dividends Paid	(14,498)	(14,487)	(13,233)
Net Cash Used for Financing Activities	(61,405)	(28,038)	(21,495)
Effect of Exchange Rate Changes on Cash and Cash Equivalents	(1,908)	(1,476)	122
NET (DECREASE) INCREASE IN CASH AND CASH EQUIVALENTS	(41,662)	11,978	27,044
Cash and Cash Equivalents at Beginning of Year	92,962	80,984	53,940
CASH AND CASH EQUIVALENTS AT END OF YEAR	51,300	92,962	80,984
Cash Paid During the Year for:
Income Taxes	23,421	11,342	13,458
Interest	1,167	1,470	1,602
Supplemental Non-Cash Investing and Financing Activities:
Capital Expenditures in Accounts Payable	$ 1,830	$ 1,197	$ 1,090