Statements of Cash Flows Statement (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Net Income (Loss) Attributable to Parent	$ 1,404	$ 14,869
Amortization	2,113	1,659
Amortization of Financing Costs and Discounts	2,261	2,032
Depreciation	3,105	2,816
Foreign Currency Transaction Gain (Loss), before Tax	(53)	253
Share-based Compensation	3,035	3,010
Provision for doubtful accounts and inventory valuation	2,382	2,325
Decrease (Increase) in Accounts Receivable	(1,928)	(19,774)
Decrease (Increase) in Inventories	(10,556)	(9,750)
Decrease (Increase) in Prepaid Expense and Other Assets	(3,002)	(4,697)
Increase (Decrease) in Accounts Payable and Accrued Liabilities	1,712	11,627
Increase (Decrease) in Other Current Liabilities	(4,535)	11,341
Increase (Decrease) in Other Noncurrent Liabilities	90	49
Net Cash Provided by (Used in) Operating Activities	(3,972)	15,760
Payments to Acquire Marketable Securities	(81,731)	(70,586)
Proceeds from Sale and Maturity of Marketable Securities	71,687	73,209
Payments to Acquire Property, Plant, and Equipment	(4,002)	(1,283)
Cash Acquired from Acquisition	(3,365)	(7,945)
Net Cash Provided by (Used in) Investing Activities	(17,411)	(6,605)
Proceeds from Issuance of Shares under Incentive and Share-based Compensation Plans, Including Stock Options	903	101
Excess Tax Benefit (Tax Deficiency) from Share-based Compensation, Financing Activities	669	203
Net Cash Provided by (Used in) Financing Activities	1,572	304
Effect of Exchange Rate on Cash and Cash Equivalents	(662)	(714)
Cash and Cash Equivalents, Period Increase (Decrease)	(20,473)	8,745
Cash and Cash Equivalents, at Carrying Value	83,780	105,416
Income Taxes Paid	5,261	2,296
Interest Paid	$ 2,250	$ 2,188