Document and Entity Information [Abstract] Statement, Equity Components [Axis] Equity Component [Domain] ASSETS Assets [Abstract] Current assets: Assets, Current [Abstract] Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Short-term investments Available-for-sale Securities, Current Accounts receivable, net Accounts and Other Receivables, Net, Current Inventories: Inventory, Net [Abstract] Raw materials and purchased parts Inventory, Raw Materials Work in process Inventory, Work in Process Finished goods Inventory, Finished Goods Total inventories Inventory, Net Total inventories Deferred income taxes Deferred Tax Assets, Net, Current Other current assets Prepaid Expense and Other Assets, Current Total current assets Assets, Current, Total Total current assets Property, plant and equipment, at cost: Property, Plant and Equipment, Net [Abstract] Land and land improvements Land Buildings and building improvements Buildings and Improvements, Gross Machinery and equipment Machinery and Equipment, Gross Total property, plant and equipment, at cost Property, Plant and Equipment, Gross Property plant and equipment, gross Less accumulated depreciation and amortization Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Less accumulated depreciation and amortization Net property, plant and equipment Property, Plant and Equipment, Net Net property, plant and equipment Goodwill Goodwill Intangible assets, net Intangible Assets, Net (Excluding Goodwill) Other assets Other Assets, Noncurrent Total property, plant and equipment, at cost Assets Total assets LIABILITIES AND STOCKHOLDERS' EQUITY Liabilities and Equity [Abstract] Current liabilities: Liabilities, Current [Abstract] Accounts payable Accounts Payable, Current Accrued compensation and benefits Employee-related Liabilities, Current Accrued warranty Product Warranty Accrual, Current Deferred profit Deferred Revenue, Current Income taxes payable Accrued Income Taxes, Current Other accrued liabilities Other Accrued Liabilities, Current Total current liabilities Liabilities, Current, Total Total current liabilities Other accrued liabilities Other Accrued Liabilities, Noncurrent Deferred income taxes Deferred Tax Liabilities, Noncurrent Commitments and contingencies Commitments and Contingencies Stockholders' equity: Stockholders' Equity Attributable to Parent [Abstract] Preferred stock, $1 par value; 1,000 shares authorized, none issued Preferred Stock, Value, Issued Preferred stock, par value Preferred Stock, Par or Stated Value Per Share Preferred stock, shares authorized Preferred Stock, Shares Authorized Preferred stock, shares issued Preferred Stock, Shares Issued Common stock, $1 par value; 60,000 shares authorized, 24,330 shares issued and outstanding in 2011 and 23,989 shares in 2010 Common Stock, Value, Issued Common stock, par value Common Stock, Par or Stated Value Per Share Common stock, shares authorized Common Stock, Shares Authorized Common stock, shares issued Common Stock, Shares, Issued Common stock, shares outstanding Common Stock, Shares, Outstanding Paid-in capital Additional Paid in Capital, Common Stock Retained earnings Retained Earnings (Accumulated Deficit) Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax Stockholders' Equity Attributable to Parent, Total Ending balance Beginning balance Total stockholders' equity Total stockholders' equity Total stockholders' equity Liabilities and Equity Total liabilities and stockholders' equity Net sales Revenue, Net Cost and expenses: Costs and Expenses [Abstract] Cost of sales Cost of Goods and Services Sold Research and development Research and Development Expense Selling, general and administrative Selling, General and Administrative Expense Total cost and expenses Costs and Expenses Total cost and expenses Income (loss) from operations Operating Income (Loss) Income (loss) from operations Interest and other income Investment Income, Interest Income (loss) before income taxes Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest Income (loss) before income taxes Income tax provision Income Tax Expense (Benefit) Net income (loss) Net Income (Loss) Attributable to Parent Net income (loss) Income (loss) per share: Earnings Per Share [Abstract] Basic Earnings Per Share, Basic Diluted Earnings Per Share, Diluted Weighted average shares used in computing income (loss) per share: Weighted Average Number of Shares Outstanding, Diluted [Abstract] Basic Weighted Average Number of Shares Outstanding, Basic Diluted Weighted Average Number of Shares Outstanding, Diluted Statement [Table] Statement [Line Items] Common stock $1 par value Paid-in capital Retained earnings Accumulated other comprehensive income (loss) Components of comprehensive income (loss): Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract] Changes in cumulative translation adjustment Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax Adjustments related to postretirement benefits, net of income taxes Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax Changes in unrealized gains and losses on investments, net of income taxes Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax Comprehensive income (loss) Comprehensive loss Comprehensive Income (Loss), Net of Tax, Attributable to Parent Cash dividends - $0.24 per share Dividends, Common Stock, Cash Cash dividends - $0.24 per share Cash dividend, per share Common Stock, Dividends, Per Share, Declared Shares issued under employee stock purchase plan Stock Issued During Period, Value, Employee Stock Purchase Plan Shares issued for restricted stock units vested Stock Issued During Period, Value, Restricted Stock Award, Gross Repurchase and retirement of stock Stock Repurchased and Retired During Period, Value Repurchase and retirement of stock Share-based compensation expense Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition Tax benefit (deficiency) from equity awards Adjustment to Additional Paid in Capital, Income Tax Effect from Share-based Compensation, Net Exercise of stock options Stock Issued During Period, Value, Stock Options Exercised Cash flows from operating activities: Net Cash Provided by (Used in) Operating Activities [Abstract] Adjustments to reconcile net income (loss) to net cash provided from operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Depreciation and amortization Depreciation, Depletion and Amortization Share-based compensation expense Share-based Compensation Deferred income taxes Deferred Income Tax Expense (Benefit) Accrued retiree benefits Pension and Other Postretirement Benefit Expense Excess tax benefit from stock options exercised Excess Tax Benefit from Share-based Compensation, Operating Activities Excess tax benefit from stock options exercised Loss on investment write-down Other than Temporary Impairment Losses, Investments, Portion Recognized in Earnings, Net Changes in current assets and liabilities: Increase (Decrease) in Operating Capital [Abstract] Accounts receivable Increase (Decrease) in Accounts Receivable Accounts receivable Inventories Increase (Decrease) in Inventories Inventories Accounts payable Increase (Decrease) in Accounts Payable Other current assets Increase (Decrease) in Other Operating Assets Other current assets Income taxes payable, including excess stock option exercise benefits Increase (Decrease) in Income Taxes Payable Customer advances Increase (Decrease) in Customer Advances Deferred profit Increase (Decrease) in Deferred Revenue Accrued compensation, warranty and other liabilities Increase (Decrease) in Accrued Liabilities Net cash provided from operating activities Net Cash Provided by (Used in) Operating Activities Net cash provided from operating activities Cash flows from investing activities: Net Cash Provided by (Used in) Investing Activities [Abstract] Purchases of short-term investments Payments to Acquire Available-for-sale Securities Purchases of short-term investments Sales and maturities of short-term investments Proceeds from Sale and Maturity of Available-for-sale Securities Purchases of property, plant and equipment Payments to Acquire Property, Plant, and Equipment Purchases of property, plant and equipment Other assets Payments for (Proceeds from) Other Investing Activities Other assets Net cash (used for) provided from investing activities Net Cash Provided by (Used in) Investing Activities Net cash (used for) provided from investing activities Cash flows from financing activities: Net Cash Provided by (Used in) Financing Activities [Abstract] Issuance of stock, net Proceeds from (Repurchase of) Equity Excess tax benefit from stock options exercised Excess Tax Benefit from Share-based Compensation, Financing Activities Cash dividends paid Payments of Dividends, Common Stock Cash dividends paid Net cash used for financing activities Net Cash Provided by (Used in) Financing Activities Net cash used for financing activities Effect of exchange rate changes on cash and cash equivalents Effect of Exchange Rate on Cash and Cash Equivalents Net increase in cash and cash equivalents Cash and Cash Equivalents, Period Increase (Decrease) Net increase in cash and cash equivalents Cash and cash equivalents at beginning of year Cash and cash equivalents at end of year Supplemental disclosure of cash flow information: Supplemental Cash Flow Information [Abstract] Cash paid (refunded) during the year for: Cash Refunded During Year Abstract Cash paid (refunded) during the year for: Income taxes Proceeds from Income Tax Refunds Inventory Capitalized As Property Plant and Equipment Inventory capitalized as capital assets Inventory capitalized as capital assets Dividends declared but not yet paid Dividends Payable, Amount Summary of Significant Accounting Policies Significant Accounting Policies [Text Block] Summary of Significant Accounting Policies [Abstract] Summary of Significant Accounting Policies [Abstract] Goodwill and Purchased Intangible Assets Goodwill and Intangible Assets Disclosure [Text Block] Goodwill and Purchased Intangible Assets [Abstract] Goodwill and Purchased Intangible Assets [Abstract] Cash, Cash Equivalents and Short-term Investments Cash and Cash Equivalents Disclosure [Text Block] Cash, Cash Equivalents and Short-term Investments [Abstract] Cash, Cash Equivalents and Short-term Investments [Abstract] Comprehensive Income (Loss) Comprehensive Income (Loss) Note [Text Block] Comprehensive Income (Loss) and Stockholder Rights Plan [Abstract] Comprehensive Income (Loss) and Stockholder Rights Plan [Abstract] Employee Benefit Plans Disclosure of Compensation Related Costs, Share-based Payments [Text Block] Employee Benefit Plans [Abstract] Employee Benefit Plans [Abstract] Income Taxes Income Tax Disclosure [Text Block] Income Taxes [Abstract] Income Taxes [Abstract] Segment and Related Information Segment Reporting Disclosure [Text Block] Segment and Related Information [Abstract] Segment and Related Information [Abstract] Stockholder Rights Plan Disclosure [Text Block] Stockholder Rights Plan Stockholder Rights Plan Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Commitments and Contingencies [Abstract] Commitments and Contingencies [Abstract] Guarantees Guarantees [Text Block] Guarantees [Abstract] Guarantees [Abstract] Related Party Transactions Related Party Transactions Disclosure [Text Block] Related Party Transactions [Abstract] Related Party Transactions [Abstract] Quarterly Financial Data (Unaudited) Quarterly Financial Information [Text Block] Quarterly Financial Data (Unaudited) [Abstract] Quarterly Financial Data (Unaudited) [Abstract] Amendment Flag Current Fiscal Year End Date Document Period End Date Document Type Entity Central Index Key Entity Common Stock, Shares Outstanding Entity Current Reporting Status Entity Filer Category Entity Registrant Name Entity Voluntary Filers Entity Well-known Seasoned Issuer Entity Public Float Document Fiscal Period Focus Document Fiscal Year Focus Consolidated Balance Sheets [Abstract] Consolidated Statements of Operations [Abstract] Consolidated Statements of Stockholders' Equity [Abstract] Consolidated Statements of Cash Flows [Abstract]