Net income Depreciation and amortization Cash and cash equivalents Stock-based compensation Accounts receivable, net Inventories Other current assets Total current assets Property and equipment, net Goodwill Accounts receivable Other non-current assets Total assets Inventories Accounts payable Current portion of long-term debt Accrued expenses Total current liabilities Long-term debt Other liabilities Total liabilities Additional paid-in capital Accumulated other comprehensive loss Retained earnings Total shareholders' equity Total liabilities and shareholders' equity Net cash provided by operating activities Purchases of property and equipment Revenue, net Cost of revenue Gross margin Payments for (Proceeds from) Investments Sales and maturities of investments Sales and maturities of investments Net cash used in investing activities Total operating expenses Operating income Interest income Total other expense, net Income before income taxes Net income Basic Diluted Weighted average shares outstanding: Diluted Weighted average shares outstanding: Basic Income Tax Expense (Benefit) Income tax provision Issuance of common stock under employee plans Repurchases of common stock Tax benefit from employee stock plans Excess tax benefits from employee stock plans Net cash provided by (used in) financing activities Net increase in cash and cash equivalents Cash and cash equivalents, beginning of period Cash and cash equivalents, end of period Repayment of debt Cash paid for income taxes Cash paid for interest The carrying value as of the balance sheet date for estimated warranty costs Accrued warranty Preferred stock, par value Preferred stock, shares authorized Preferred stock, shares outstanding Common stock, par value Common stock, shares authorized Common stock, shares outstanding Research and development Basis of Presentation Income Taxes Other assets and liabilities Debt Stock-Based Compensation Fair Value Measurements Recent Accounting Pronouncements LIABILITIES AND SHAREHOLDERS' EQUITY Shareholders' equity: Current liabilities: Accrued warranty Accrued warranty ASSETS Current assets: Cash flows from financing activities Cash flows from investing activities Cash flows from operating activities Changes in: Other income (expense): Operating expenses: Income per Common Share [Abstract] Supplemental Financial Statement Data [Abstract] Supplemental Financial Statement Data [Abstract] Supplemental Financial Statement Data. Debt [Abstract] Debt [Abstract] Debt. Legal Proceedings [Abstract] Legal Proceedings [Abstract] Legal Proceedings. Fair Value Measurements [Abstract] Fair Value Measurements [Abstract] Fair Value Measurements. Foreign Exchange Contracts [Abstract] Foreign Exchange Contracts [Abstract] Foreign Exchange Contracts. Supplemental Financial Statement Data Supplemental Financial Statement Data Text Block Supplemental Financial Statement Data. Legal Proceedings Legal Proceedings Text Block Legal Proceedings. Foreign Exchange Contracts Interest and other expense Interest and other expense Expense for borrowed money and other non-operating activities. Entity Common Stock, Shares Outstanding (actual number) Supplemental disclosure of cash flow information: Interest and other expense Foreign Exchange Contracts [Abstract] Fair Value Measurements [Abstract] Legal Proceedings [Abstract] Debt [Abstract] Supplemental Financial Statement Data [Abstract] Accounts payable Accounts Payable, Current, Total Accounts Payable, Current Accrued expenses Accrued Liabilities, Current, Total Accrued Liabilities, Current Commitments and contingencies (Notes 4 and 6) Commitments and Contingencies Purchases of property and equipment Payments to Acquire Productive Assets Repurchases of common stock Repayment of debt Repayments of Long-term Debt Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Accounts receivable, net Accounts Receivable, Net, Current Inventories Inventory, Net Other current assets Total current assets Assets, Current Other non-current assets Property and equipment, net Property, Plant and Equipment, Net, Beginning Balance Property, Plant and Equipment, Net, Ending Balance Property, Plant and Equipment, Net Total current liabilities Liabilities, Current Long-term debt Long-term Debt, Excluding Current Maturities Other liabilities Total liabilities Liabilities Additional paid-in capital Additional Paid in Capital, Beginning Balance Additional Paid in Capital, Ending Balance Additional Paid in Capital Accumulated other comprehensive income Accumulated Other Comprehensive Income (Loss), Net of Tax, Beginning Balance Accumulated Other Comprehensive Income (Loss), Net of Tax, Ending Balance Accumulated Other Comprehensive Income (Loss), Net of Tax Retained earnings Retained Earnings (Accumulated Deficit), Beginning Balance Retained Earnings (Accumulated Deficit), Ending Balance Retained Earnings (Accumulated Deficit) Revenue, net Sales Revenue, Goods, Net Operating income Operating Income (Loss) Income before income taxes Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Cumulative Effects of Changes in Accounting Principles, Noncontrolling Interest Basic Diluted Stock-based compensation Share-based Compensation Inventories Increase (Decrease) in Inventories Accrued expenses Increase (Decrease) in Accrued Liabilities Other assets and liabilities Repayment of debt Net increase in cash and cash equivalents Cash and Cash Equivalents, Period Increase (Decrease) Income per Common Share Earnings Per Share [Text Block] Adjustments to reconcile net income to net cash provided by operations: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Document and Entity Information [Abstract] Document and Entity Information [Abstract] Document and Entity Information. Net income Depreciation and amortization Depreciation, Depletion and Amortization, Nonproduction Weighted average shares outstanding: Weighted Average Number of Shares Outstanding, Diluted [Abstract] Earnings Per Share, Basic Earnings Per Share, Diluted Condensed Consolidated Balance Sheets [Abstract] Condensed Consolidated Statements of Income (Unaudited) [Abstract] Condensed Consolidated Statements of Cash Flows [Abstract] ASSETS Current assets: Goodwill Goodwill, Beginning Balance Goodwill, Ending Balance LIABILITIES AND SHAREHOLDERS' EQUITY Current liabilities: Shareholders' equity: Preferred stock, par value Preferred stock, shares authorized Preferred stock, shares outstanding Preferred Stock, Shares Outstanding, Beginning Balance Preferred Stock, Shares Outstanding, Ending Balance Common stock, par value Common stock, shares authorized Common stock, shares outstanding Common Stock, Shares, Outstanding, Beginning Balance Common Stock, Shares, Outstanding, Ending Balance Operating expenses: Research and development Other income (expense): Interest income Income per common share: Cash flows from operating activities Net income Changes in: Accounts receivable, net Accounts payable Cash flows from investing activities Cash flows from financing activities Issuance of stock under employee stock plans Supplemental disclosure of cash flow information: Cash paid for income taxes Cash paid for interest Basis of Presentation [Abstract] Stock-Based Compensation [Abstract] Income Taxes [Abstract] Recent Accounting Pronouncements [Abstract] Other intangible assets, net Intangibles, net Net carrying amount after accumulated amortization as of the balance sheet date of intangible assets not otherwise specified in the taxonomy having a reasonably expected period of economic benefit. Preferred stock, $.01 par value; authorized - 5 shares; outstanding - none Preferred stock, $.01 par value; authorized - 5 shares; outstanding - None Dollar value of issued nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer) whether issued at par value, no par or stated value. Note: elements for number of nonredeemable preferred shares, par value and other disclosure concepts are in another section within stockholders' equity. Common Stock Values Common stock, $.01 par value; authorized - 450 shares; outstanding - 225 shares Common stock, $.01 par value; authorized - 450 shares; outstanding - 229 and 225 shares, respectively Dollar value of issued common stock whether issued at par value, no par or stated value. Note: elements for number of common shares, par value and other disclosure concepts are in another section within stockholders' equity. Entity Registrant Name Entity Central Index Key Document Type Document Period End Date Amendment Flag Current Fiscal Year End Date Entity Well-known Seasoned Issuer Entity Voluntary Filers Entity Current Reporting Status Entity Filer Category Entity Public Float Assets Long-term Debt, Current Maturities Preferred Stock Values Stockholders' Equity Attributable to Parent Liabilities and Stockholders' Equity Cost of Goods Sold Gross Profit Operating Expenses Nonoperating Income (Expense) Net Cash Provided by (Used in) Operating Activities Net Cash Provided by (Used in) Investing Activities Net Cash Provided by (Used in) Financing Activities Taxes paid on vested stock awards under employee stock plans Taxes paid on vested stock awards under employee stock plans Taxes paid on vested stock awards under employee stock plans. Selling, general and administrative Selling General And Administrative Expense Operating Expenses The aggregate total costs related to selling a firm's product and services, as well as all other general and administrative expenses. Direct selling expenses (for example, credit and advertising) are expenses that can be directly linked to the sale of specific products. Indirect selling expenses are expenses that cannot be directly linked to the sale of specific products, for example telephone expenses, Internet, and postal charges. General and administrative expenses include salaries of non-sales personnel, rent, utilities, communication, etc. Selling, general and administrative Loss on investments Loss On Investments The difference between the carrying value and the sale price of debt securities includes other than temporary impairment on auction-rate securities. This element refers to the gain (loss) included in earnings and not to the cash proceeds of the sale. Restructuring Restructuring Charges Non-cash portion of restructuring Restructuring Costs, Total Restructuring Costs Deferred income taxes Deferred Income Tax Expense (Benefit), Total Deferred Income Tax Expense (Benefit) Acquired in-process research and development Research and Development in Process Acquisitions, net of cash acquired Payments to Acquire Businesses, Net of Cash Acquired, Total Payments to Acquire Businesses, Net of Cash Acquired Acquisitions, net of cash acquired Document Fiscal Year Focus Document Fiscal Period Focus Subsequent Event Abstract. Subsequent Event [Abstract] Schedule of Subsequent Events [Text Block] Subsequent Event