$TER
TERADYNE, INC Stock $ter

$ter Overview Financials Valuation SEC Filings Company Website

2011 Q4 Form 10-K Financial Statement

#000119312513087821 Filed on March 01, 2013

Income Statement

Concept	2011 Q4	2011 Q3	2011 Q2
Revenue	$297.0M	$344.4M	$410.5M
YoY Change	-39.56%	-22.66%	28.57%
Cost Of Revenue	$163.0M	$174.0M	$195.9M
YoY Change	-25.76%	-10.49%	31.06%
Gross Profit	$134.0M	$170.4M	$214.6M
YoY Change	-50.71%	-32.09%	26.3%
Gross Profit Margin	45.11%	49.47%	52.27%
Selling, General & Admin	$64.94M	$54.78M	$58.03M
YoY Change	7.17%	-5.07%	6.08%
% of Gross Profit	48.48%	32.15%	27.04%
Research & Development	$56.36M	$45.90M	$48.39M
YoY Change	15.03%	-6.9%	1.03%
% of Gross Profit	42.07%	26.94%	22.55%
Depreciation & Amortization	$22.80M	$22.90M	$23.50M
YoY Change	-7.32%	-6.15%	-6.37%
% of Gross Profit	17.02%	13.44%	10.95%
Operating Expenses	$144.3M	$108.9M	$114.8M
YoY Change	23.4%	-4.73%	4.42%
Operating Profit	-$10.29M	$61.48M	$99.84M
YoY Change	-106.64%	-54.99%	66.39%
Interest Expense	$6.134M	$6.068M	$5.316M
YoY Change	-233.35%	-248.0%	-204.24%
% of Operating Profit		9.87%	5.32%
Other Income/Expense, Net
YoY Change
Pretax Income	-$15.55M	$58.47M	$95.92M
YoY Change	-110.21%	-55.73%	77.96%
Income Tax	-$144.6M	$1.759M	$7.839M
% Of Pretax Income		3.01%	8.17%
Net Earnings	$129.1M	$56.71M	$87.25M
YoY Change	-12.38%	-53.56%	74.16%
Net Earnings / Revenue	43.46%	16.47%	21.25%
Basic Earnings Per Share	$0.70	$0.31	$0.47
Diluted Earnings Per Share	$0.58	$0.26	$0.38
COMMON SHARES
Basic Shares Outstanding	185.1M shares	185.4M shares	184.7M
Diluted Shares Outstanding	221.9M shares	230.5M shares

Balance Sheet

Concept	2011 Q4	2011 Q3	2011 Q2
SHORT-TERM ASSETS
Cash & Short-Term Investments	$1.192B	$909.3M	$855.8M
YoY Change	70.78%	60.71%	85.84%
Cash & Equivalents	$573.7M	$455.4M	$420.3M
Short-Term Investments	$96.50M	$453.9M	$435.6M
Other Short-Term Assets	$87.30M	$84.70M	$79.00M
YoY Change	7.91%	25.11%	25.2%
Inventory	$160.1M	$141.5M	$129.7M
Prepaid Expenses
Receivables	$129.3M	$207.8M	$186.3M
Other Receivables	$0.00	$0.00	$0.00
Total Short-Term Assets	$1.100B	$1.343B	$1.251B
YoY Change	-7.42%	39.17%	59.03%
LONG-TERM ASSETS
Property, Plant & Equipment	$232.2M	$233.4M	$233.0M
YoY Change	-0.04%	-0.98%	-3.04%
Goodwill	$352.8M
YoY Change
Intangibles	$393.0M
YoY Change
Long-Term Investments	$40.70M	$282.0M	$244.5M
YoY Change	-79.8%	195.29%	238.64%
Other Assets	$17.55M	$31.10M	$30.80M
YoY Change	-55.47%	103.27%	72.07%
Total Long-Term Assets	$1.089B	$654.9M	$623.9M
YoY Change	80.41%	35.31%	31.29%
TOTAL ASSETS
Total Short-Term Assets	$1.100B	$1.343B	$1.251B
Total Long-Term Assets	$1.089B	$654.9M	$623.9M
Total Assets	$2.189B	$1.998B	$1.875B
YoY Change	22.16%	37.88%	48.59%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$69.84M	$107.0M	$110.0M
YoY Change	-47.61%	11.46%	54.49%
Accrued Expenses	$128.0M	$134.9M	$118.6M
YoY Change	-14.27%	-5.8%	4.13%
Deferred Revenue
YoY Change
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due	$2.573M	$2.500M	$2.400M
YoY Change	7.21%	8.7%	14.29%
Total Short-Term Liabilities	$373.7M	$353.0M	$333.5M
YoY Change	-6.88%	19.95%	30.17%
LONG-TERM LIABILITIES
Long-Term Debt	$160.0M	$154.8M	$151.7M
YoY Change	8.59%	6.39%	6.53%
Other Long-Term Liabilities	$133.0M	$146.6M	$152.3M
YoY Change	-19.59%	61.81%	17.7%
Total Long-Term Liabilities	$160.0M	$301.4M	$304.0M
YoY Change	-48.85%	27.66%	11.85%
TOTAL LIABILITIES
Total Short-Term Liabilities	$373.7M	$353.0M	$333.5M
Total Long-Term Liabilities	$160.0M	$301.4M	$304.0M
Total Liabilities	$683.6M	$664.4M	$647.3M
YoY Change	-5.62%	22.9%	20.74%
SHAREHOLDERS EQUITY
Retained Earnings	$184.2M
YoY Change
Common Stock	$22.95M
YoY Change
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$1.505B	$1.334B	$1.227B
YoY Change
Total Liabilities & Shareholders Equity	$2.189B	$1.998B	$1.875B
YoY Change	22.16%	37.88%	48.59%

Cashflow Statement

Concept	2011 Q4	2011 Q3	2011 Q2
OPERATING ACTIVITIES
Net Income	$129.1M	$56.71M	$87.25M
YoY Change	-12.38%	-53.56%	74.16%
Depreciation, Depletion And Amortization	$22.80M	$22.90M	$23.50M
YoY Change	-7.32%	-6.15%	-6.37%
Cash From Operating Activities	$93.00M	$102.0M	$19.60M
YoY Change	-63.64%	-5.47%	-24.9%
INVESTING ACTIVITIES
Capital Expenditures	-$22.10M	-$22.40M	-$22.10M
YoY Change	20.77%	23.76%	25.57%
Acquisitions
YoY Change
Other Investing Activities	$597.7M	-$55.20M	$16.20M
YoY Change	-389.02%	-13.21%	-118.37%
Cash From Investing Activities	$575.5M	-$77.60M	-$5.900M
YoY Change	-355.78%	-5.02%	-94.42%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-28.70M	10.60M	8.900M
YoY Change	3088.89%	-70.39%	78.0%
NET CHANGE
Cash From Operating Activities	93.00M	102.0M	19.60M
Cash From Investing Activities	575.5M	-77.60M	-5.900M
Cash From Financing Activities	-28.70M	10.60M	8.900M
Net Change In Cash	639.8M	35.00M	22.60M
YoY Change	2039.8%	-43.55%	-130.25%
FREE CASH FLOW
Cash From Operating Activities	$93.00M	$102.0M	$19.60M
Capital Expenditures	-$22.10M	-$22.40M	-$22.10M
Free Cash Flow	$115.1M	$124.4M	$41.70M
YoY Change	-58.01%	-1.27%	-4.58%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
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CY2009Q1	us-gaap	Loans Payable To Bank LoansPayableToBank	10000000
CY2009Q1	us-gaap	Mortgage Loans On Real Estate MortgageLoansOnRealEstate	6000000
CY2009Q1	ter	Warrant Strike Price WarrantStrikePrice	7.67
CY2009Q2	us-gaap	Debt Instrument Face Amount DebtInstrumentFaceAmount	190000000
CY2009Q2	ter	Debt Instrument Warrant Transaction Received DebtInstrumentWarrantTransactionReceived	163000000
CY2009Q2	us-gaap	Debt Instrument Face Amount DebtInstrumentFaceAmount	190000000
CY2010Q1	ter	Value Of Common Stock Issued To Employees Per Share ValueOfCommonStockIssuedToEmployeesPerShare	8.29
CY2011Q1	ter	Value Of Common Stock Issued To Employees Per Share ValueOfCommonStockIssuedToEmployeesPerShare	11.65
CY2011Q2	ter	Value Of Common Stock Issued To Employees Per Share ValueOfCommonStockIssuedToEmployeesPerShare	11.59
CY2012Q1	ter	Value Of Common Stock Issued To Employees Per Share ValueOfCommonStockIssuedToEmployeesPerShare	11.69
CY2012Q2	ter	Value Of Common Stock Issued To Employees Per Share ValueOfCommonStockIssuedToEmployeesPerShare	11.91
CY2010Q2	ter	Value Of Common Stock Issued To Employees Per Share ValueOfCommonStockIssuedToEmployeesPerShare	8.12
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CY2010Q4	us-gaap	Stockholders Equity StockholdersEquity	1122188000
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CY2011Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	144991000
CY2011Q4	us-gaap	Land Land	16561000
CY2011Q4	us-gaap	Assets Current AssetsCurrent	1099887000
CY2011Q4	us-gaap	Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrent PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent	76638000
CY2011Q4	us-gaap	Inventory Finished Goods InventoryFinishedGoods	33473000
CY2011Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	253134000
CY2011Q4	us-gaap	Deferred Tax Assets Inventory DeferredTaxAssetsInventory	42760000
CY2011Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	565987000
CY2011Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	232207000
CY2011Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	2573000
CY2011Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	1293130000
CY2011Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	159956000
CY2011Q4	us-gaap	Available For Sale Securities Fair Value Disclosure AvailableForSaleSecuritiesFairValueDisclosure	180909000
CY2011Q4	ter	Deferred Revenue And Customer Advances Current DeferredRevenueAndCustomerAdvancesCurrent	78670000
CY2011Q4	ter	Deferred Tax Assets Net Operating And Capital Loss Carryforwards DeferredTaxAssetsNetOperatingAndCapitalLossCarryforwards	37899000
CY2011Q4	ter	Deferred Revenue And Customer Advances Undelivered Elements DeferredRevenueAndCustomerAdvancesUndeliveredElements	7939000
CY2011Q4	ter	Deferred Revenue And Customer Advances Acceptance DeferredRevenueAndCustomerAdvancesAcceptance	318000
CY2011Q4	ter	Non Us Pension Settlement NonUSPensionSettlement	1200000
CY2011Q4	ter	Total Assets From Continuing Operations TotalAssetsFromContinuingOperations	2188639000
CY2011Q4	ter	Maintenance Training And Extended Warranty MaintenanceTrainingAndExtendedWarranty	33953000
CY2011Q4	ter	Total Deferred Revenue And Customer Advances TotalDeferredRevenueAndCustomerAdvances	112211000
CY2011Q4	ter	Share Based Compensation Arrangement By Share Based Payment Awards Options Grants In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardsOptionsGrantsInPeriod	100000	shares
CY2011Q4	ter	Defined Benefit Plan Accumulated Other Comprehensive Income Net Gains Losses Tax DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesTax	9000
CY2011Q4	ter	Defined Benefit Plan Accumulated Other Comprehensive Income Net Transition Assets Obligations Tax DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetTransitionAssetsObligationsTax	666000
CY2012Q4	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	95487000
CY2012Q4	us-gaap	Goodwill Goodwill	349272000
CY2012Q4	us-gaap	Operating Leases Future Minimum Payments Due Current OperatingLeasesFutureMinimumPaymentsDueCurrent	14174000
CY2012Q4	us-gaap	Buildings And Improvements Gross BuildingsAndImprovementsGross	106706000
CY2012Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	856374000
CY2012Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	170648000
CY2012Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Available For Grant ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant	6414000	shares
CY2012Q4	us-gaap	Deferred Tax Assets Net Current DeferredTaxAssetsNetCurrent	77305000
CY2012Q4	us-gaap	Asset Retirement Obligation Legally Restricted Assets Fair Value AssetRetirementObligationLegallyRestrictedAssetsFairValue	278900000
CY2012Q4	us-gaap	Acquired Finite Lived Intangible Asset Amount AcquiredFiniteLivedIntangibleAssetAmount	310500000
CY2012Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Compensated Absences DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsCompensatedAbsences	6452000
CY2012Q4	us-gaap	Defined Benefit Plan Fair Value Of Plan Assets DefinedBenefitPlanFairValueOfPlanAssets	302899000
CY2012Q4	us-gaap	Customer Advances And Deposits CustomerAdvancesAndDeposits	39613000
CY2012Q4	us-gaap	Restructuring Reserve RestructuringReserve	1327000
CY2012Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	55446000
CY2012Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	32476000
CY2012Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	20209000
CY2012Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Three LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree	191163000
CY2012Q4	us-gaap	Business Acquisition Contingent Consideration At Fair Value BusinessAcquisitionContingentConsiderationAtFairValue	388000
CY2012Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	52351000
CY2012Q4	us-gaap	Stockholders Equity StockholdersEquity	1778355000
CY2012Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	318867000
CY2012Q4	us-gaap	Goodwill Impaired Accumulated Impairment Loss GoodwillImpairedAccumulatedImpairmentLoss	408723000
CY2012Q4	us-gaap	Machinery And Equipment Gross MachineryAndEquipmentGross	606414000
CY2012Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies
CY2012Q4	us-gaap	Debt Instrument Face Amount DebtInstrumentFaceAmount	190000000
CY2012Q4	us-gaap	Operating Leases Future Minimum Payments Due In Four Years OperatingLeasesFutureMinimumPaymentsDueInFourYears	7761000
CY2012Q4	us-gaap	Available For Sale Securities Amortized Cost AvailableForSaleSecuritiesAmortizedCost	663625000
CY2012Q4	us-gaap	Marketable Securities Noncurrent MarketableSecuritiesNoncurrent	235872000
CY2012Q4	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized	52100000
CY2012Q4	us-gaap	Construction In Progress Gross ConstructionInProgressGross	3425000
CY2012Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	56861000
CY2012Q4	us-gaap	Sharebased Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Outstanding Options Weighted Average Exercise Price Beginning Balance1 SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1	4.64
CY2012Q4	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Intrinsic Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1	26436000
CY2012Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive
CY2012Q4	us-gaap	Debt Instrument Interest Rate Effective Percentage DebtInstrumentInterestRateEffectivePercentage	0.145	pure
CY2012Q4	us-gaap	Deferred Tax Assets Deferred Income DeferredTaxAssetsDeferredIncome	15118000
CY2012Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	1000000000	shares
CY2012Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Five FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	46193000
CY2012Q4	us-gaap	Mortgage Loans On Real Estate Commercial And Consumer Net MortgageLoansOnRealEstateCommercialAndConsumerNet	12300000
CY2012Q4	us-gaap	Debt Instrument Convertible Carrying Amount Of The Equity Component DebtInstrumentConvertibleCarryingAmountOfTheEquityComponent	63400000
CY2012Q4	us-gaap	Accrued Income Taxes Current AccruedIncomeTaxesCurrent	12306000
CY2012Q4	us-gaap	Debt Instrument Convertible Conversion Price1 DebtInstrumentConvertibleConversionPrice1	5.48
CY2012Q4	us-gaap	Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Number Of Outstanding Options ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions	3841000	shares
CY2012Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	86264000
CY2012Q4	us-gaap	Debt Instrument Unamortized Discount DebtInstrumentUnamortizedDiscount	20104000
CY2012Q4	us-gaap	Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Number Of Exercisable Options ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions	2004000	shares
CY2012Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	138172000
CY2012Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	47051000
CY2012Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	187908000	shares
CY2012Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	14800000
CY2012Q4	us-gaap	Defined Benefit Plan Accumulated Other Comprehensive Income Net Prior Service Cost Credit After Tax DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditAfterTax	-2895000
CY2012Q4	us-gaap	Operating Leases Future Minimum Payments Due In Three Years OperatingLeasesFutureMinimumPaymentsDueInThreeYears	9770000
CY2012Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	9355000
CY2012Q4	us-gaap	Inventory Work In Process InventoryWorkInProcess	32303000
CY2012Q4	us-gaap	Long Term Debt And Capital Lease Obligations LongTermDebtAndCapitalLeaseObligations	173387000
CY2012Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableNumber	2004000	shares
CY2012Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue	59100000
CY2012Q4	us-gaap	Operating Leases Future Minimum Payments Due In Two Years OperatingLeasesFutureMinimumPaymentsDueInTwoYears	12024000
CY2012Q4	us-gaap	Defined Benefit Plan Assets For Plan Benefits Noncurrent DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent	3282000
CY2012Q4	us-gaap	Product Warranty Accrual ProductWarrantyAccrual	9786000
CY2012Q4	us-gaap	Marketable Securities Current MarketableSecuritiesCurrent	431516000
CY2012Q4	us-gaap	Liabilities Fair Value Disclosure LiabilitiesFairValueDisclosure	388000
CY2012Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets	114730000
CY2012Q4	us-gaap	Liabilities Liabilities	650990000
CY2012Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	58324000
CY2012Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	17467000
CY2012Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	72132000
CY2012Q4	us-gaap	Deferred Tax Liability Not Recognized Amount Of Unrecognized Deferred Tax Liability DeferredTaxLiabilityNotRecognizedAmountOfUnrecognizedDeferredTaxLiability	10600000
CY2012Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	282000
CY2012Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Maximum Employee Subscription Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumEmployeeSubscriptionRate	0.10	pure
CY2012Q4	us-gaap	Notional Amount Of Foreign Currency Derivative Sale Contracts NotionalAmountOfForeignCurrencyDerivativeSaleContracts	47300000
CY2012Q4	us-gaap	Operating Leases Future Minimum Payments Due In Five Years OperatingLeasesFutureMinimumPaymentsDueInFiveYears	3749000
CY2012Q4	us-gaap	Valuation Allowance Amount ValuationAllowanceAmount	55400000
CY2012Q4	us-gaap	Derivative Assets DerivativeAssets	121000
CY2012Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue	12.72
CY2012Q4	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliations Recurring Basis Liability Value FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue	388000
CY2012Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards DeferredTaxAssetsTaxCreditCarryforwards	64123000
CY2012Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	401285000
CY2012Q4	us-gaap	Assets Assets	2429345000
CY2012Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	4.64
CY2012Q4	us-gaap	Deferred Tax Liabilities Noncurrent DeferredTaxLiabilitiesNoncurrent	50201000
CY2012Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards Foreign DeferredTaxAssetsOperatingLossCarryforwardsForeign	8669000
CY2012Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	153423000
CY2012Q4	us-gaap	Inventory Net InventoryNet	139410000
CY2012Q4	us-gaap	Notional Amount Of Foreign Currency Derivative Purchase Contracts NotionalAmountOfForeignCurrencyDerivativePurchaseContracts	16800000
CY2012Q4	us-gaap	Assets Fair Value Disclosure AssetsFairValueDisclosure	1006429000
CY2012Q4	us-gaap	Availableforsale Securities Gross Unrealized Gain AvailableforsaleSecuritiesGrossUnrealizedGain	3862000
CY2012Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals	14246000
CY2012Q4	us-gaap	Extended Product Warranty Accrual ExtendedProductWarrantyAccrual	26987000
CY2012Q4	us-gaap	Debt Current DebtCurrent	2328000
CY2012Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	2429345000
CY2012Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Exercisable Aggregate Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableAggregateIntrinsicValue	46283000
CY2012Q4	us-gaap	Leasehold Improvements Gross LeaseholdImprovementsGross	29585000
CY2012Q4	us-gaap	Deferred Tax Assets In Process Research And Development DeferredTaxAssetsInProcessResearchAndDevelopment	284000
CY2012Q4	us-gaap	Long Term Debt LongTermDebt	171059000
CY2012Q4	us-gaap	Convertible Debt ConvertibleDebt	169896000
CY2012Q4	us-gaap	Business Acquisition Percentage Of Voting Interests Acquired BusinessAcquisitionPercentageOfVotingInterestsAcquired	0.50	pure
CY2012Q4	us-gaap	Foreign Currency Derivative Instruments Not Designated As Hedging Instruments At Fair Value Net ForeignCurrencyDerivativeInstrumentsNotDesignatedAsHedgingInstrumentsAtFairValueNet	121000
CY2012Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	338920000
CY2012Q4	us-gaap	Available For Sale Securities Gross Unrealized Losses1 AvailableForSaleSecuritiesGrossUnrealizedLosses1	99000
CY2012Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	537366000
CY2012Q4	us-gaap	Notional Amount Of Foreign Currency Derivatives NotionalAmountOfForeignCurrencyDerivatives	30500000
CY2012Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	187908000	shares
CY2012Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards State And Local DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal	11145000
CY2012Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	318867000
CY2012Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Two LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo	2328000
CY2012Q4	us-gaap	Income Tax Receivable IncomeTaxReceivable	3500000
CY2012Q4	us-gaap	Noncurrent Assets NoncurrentAssets	265782000
CY2012Q4	us-gaap	Operating Leases Future Minimum Payments Due Thereafter OperatingLeasesFutureMinimumPaymentsDueThereafter	7437000
CY2012Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber	3785000	shares
CY2012Q4	us-gaap	Deferred Tax Liabilities Investments DeferredTaxLiabilitiesInvestments	996000
CY2012Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	5820000
CY2012Q4	us-gaap	Inventory Raw Materials InventoryRawMaterials	89598000
CY2012Q4	us-gaap	Furniture And Fixtures Gross FurnitureAndFixturesGross	93683000
CY2012Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	22446000
CY2012Q4	us-gaap	Goodwill Gross GoodwillGross	757995000
CY2012Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	52351000
CY2012Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Pensions DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPensions	28674000
CY2012Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	69102000
CY2012Q4	us-gaap	Defined Benefit Plan Accumulated Other Comprehensive Income Net Transition Assets Obligations After Tax DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetTransitionAssetsObligationsAfterTax	2925000
CY2012Q4	us-gaap	Other Accrued Liabilities Noncurrent OtherAccruedLiabilitiesNoncurrent	21302000
CY2012Q4	us-gaap	Liabilities Current LiabilitiesCurrent	297828000
CY2012Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	4118000
CY2012Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	3841000	shares
CY2012Q4	us-gaap	Common Stock Value CommonStockValue	23488000
CY2012Q4	us-gaap	Defined Benefit Plan Accumulated Benefit Obligation DefinedBenefitPlanAccumulatedBenefitObligation	360400000
CY2012Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.125
CY2012Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Four LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour
CY2012Q4	us-gaap	Deferred Revenue Noncurrent DeferredRevenueNoncurrent	16227000
CY2012Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	218499000
CY2012Q4	us-gaap	Land Land	16561000
CY2012Q4	us-gaap	Assets Current AssetsCurrent	1236061000
CY2012Q4	us-gaap	Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrent PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent	94373000
CY2012Q4	us-gaap	Inventory Finished Goods InventoryFinishedGoods	17509000
CY2012Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards Domestic DeferredTaxAssetsOperatingLossCarryforwardsDomestic	22354000
CY2012Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	226094000
CY2012Q4	us-gaap	Tax Credit Carryforward Amount TaxCreditCarryforwardAmount	119000000
CY2012Q4	us-gaap	Deferred Tax Assets Inventory DeferredTaxAssetsInventory	50886000
CY2012Q4	us-gaap	Operating Leases Future Minimum Payments Due OperatingLeasesFutureMinimumPaymentsDue	54915000
CY2012Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	590592000
CY2012Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	265782000
CY2012Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	2328000
CY2012Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	1347762000
CY2012Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	171059000
CY2012Q4	us-gaap	Available For Sale Securities Fair Value Disclosure AvailableForSaleSecuritiesFairValueDisclosure	667388000
CY2012Q4	us-gaap	Sharebased Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Exercisable Options Weighted Average Exercise Price1 SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1	3.70
CY2012Q4	ter	Deferred Revenue And Customer Advances Current DeferredRevenueAndCustomerAdvancesCurrent	81357000
CY2012Q4	ter	Deferred Tax Assets Net Operating And Capital Loss Carryforwards DeferredTaxAssetsNetOperatingAndCapitalLossCarryforwards	36674000
CY2012Q4	ter	Long Term Debt Maturities Repayments Of Principal In Year Six LongTermDebtMaturitiesRepaymentsOfPrincipalInYearSix
CY2012Q4	ter	Long Term Debt Maturities Repayments Of Principal In Year Six And Thereafter LongTermDebtMaturitiesRepaymentsOfPrincipalInYearSixAndThereafter
CY2012Q4	ter	Long Term Debt Maturities Repayments Of Principal Total LongTermDebtMaturitiesRepaymentsOfPrincipalTotal	193491000
CY2012Q4	ter	Share Based Compensation Arrangement Maximum Number Of Shares Authorized ShareBasedCompensationArrangementMaximumNumberOfSharesAuthorized	6000	shares
CY2012Q4	ter	Maximum Percentage Of Payroll Deduction Under Espp MaximumPercentageOfPayrollDeductionUnderEspp	0.10	pure
CY2012Q4	ter	Aggregate Purchase Commitments AggregatePurchaseCommitments	210000000
CY2012Q4	ter	Deferred Revenue And Customer Advances Undelivered Elements DeferredRevenueAndCustomerAdvancesUndeliveredElements	6773000
CY2012Q4	ter	Deferred Tax Assets Alternative Minimum Tax Credits Carryforwards DeferredTaxAssetsAlternativeMinimumTaxCreditsCarryforwards	6600000
CY2012Q4	ter	Unrecognized Tax Benefits If Recognized Would Impact Valuation Allowance UnrecognizedTaxBenefitsIfRecognizedWouldImpactValuationAllowance	2700000
CY2012Q4	ter	Total Assets From Continuing Operations TotalAssetsFromContinuingOperations	2429345000
CY2012Q4	ter	Net Operating Loss Carryforward Excess Tax Deduction Related To Stock Based Compensation NetOperatingLossCarryforwardExcessTaxDeductionRelatedToStockBasedCompensation	0
CY2012Q4	ter	Maintenance Training And Extended Warranty MaintenanceTrainingAndExtendedWarranty	51198000
CY2012Q4	ter	Total Deferred Revenue And Customer Advances TotalDeferredRevenueAndCustomerAdvances	97584000
CY2012Q4	ter	Share Based Compensation Arrangement By Share Based Payment Awards Options Grants In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardsOptionsGrantsInPeriod	200000	shares
CY2012Q4	ter	Debt Instrument Conversion Share Price DebtInstrumentConversionSharePrice	5.48
CY2012Q4	ter	Defined Benefit Plan Accumulated Other Comprehensive Income Net Gains Losses Tax DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesTax	-125000
CY2012Q4	ter	Defined Benefit Plan Accumulated Other Comprehensive Income Net Transition Assets Obligations Tax DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetTransitionAssetsObligationsTax	835000
	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	3.66
	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	3.05
	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	4.09
	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	2.77
	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	4.01
	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	3.42
	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	31175000
	us-gaap	Description Of New Accounting Pronouncements Not Yet Adopted DescriptionOfNewAccountingPronouncementsNotYetAdopted	<div> <p style="MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px"><font style="FONT-FAMILY: Times New Roman" size="2"><b>D.    RECENTLY ISSUED ACCOUNTING PRONOUNCEMENTS</b></font></p> <p style="MARGIN-TOP: 6px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px"> <font style="FONT-FAMILY: Times New Roman" size="2">In December 2011, the FASB issued ASU No. 2011-11, “<i>Disclosures about Offsetting Assets and Liabilities.”</i> This ASU is intended to enhance the understanding of the effects of netting arrangements on an entity’s financial statements, including financial instruments and derivative instruments that are either offset or subject to a master netting arrangement. The scope of this ASU includes sale and repurchase agreements, reverse sale and repurchase agreements, and securities borrowing and lending arrangements. In January 2013, the FASB issued ASU No. 2013-01 “<i>Clarifying the Scope of Disclosures about Offsetting Assets and Liabilities.</i>” This standard provided additional guidance on the scope of ASU 2011-11. The provisions of this ASU are effective for interim and annual periods beginning on or after January 1, 2013.</font></p> <p style="MARGIN-TOP: 12px; TEXT-INDENT: 4%; MARGIN-BOTTOM: 0px"> <font style="FONT-FAMILY: Times New Roman" size="2">In February 2013, the FASB issued ASU No. 2013-02, “<i>Reporting of Amounts Reclassified Out of Accumulated Other Comprehensive Income.”</i> Under this ASU, an entity is required to provide information about the amounts reclassified out of Accumulated Other Comprehensive Income (“AOCI”) by component. In addition, an entity is required to present, either on the face of the financial statements or in the notes, significant amounts reclassified out of AOCI by the respective line items of net income, but only if the amount reclassified is required to be reclassified in its entirety in the same reporting period. For amounts that are not required to be reclassified in their entirety to net income, an entity is required to cross-reference to other disclosures that provide additional details about those amounts. The provisions of this ASU are effective for interim and annual periods beginning on or after January 1, 2013.</font></p> </div>
	us-gaap	Nature Of Operations NatureOfOperations	<div> <p style="margin-top:12px;margin-bottom:0px"><font style="font-family:Times New Roman" size="2"><b>A.    THE COMPANY</b></font></p> <p style="margin-top:6px;margin-bottom:0px; text-indent:4%"> <font style="font-family:Times New Roman" size="2">Teradyne, Inc. is a leading global supplier of automatic test equipment. Teradyne’s automatic test equipment products and services include:</font></p> <p style="font-size:6px;margin-top:0px;margin-bottom:0px">  </p> <table style="BORDER-COLLAPSE:COLLAPSE" border="0" cellpadding="0" cellspacing="0" width="100%"> <tr> <td width="4%"><font size="1"> </font></td> <td width="3%" valign="top" align="left"><font style="font-family:Times New Roman" size="2">•</font></td> <td width="1%" valign="top"><font size="1"> </font></td> <td align="left" valign="top"> <p align="left"><font style="font-family:Times New Roman" size="2">semiconductor test (“Semiconductor Test”) systems;</font></p> </td> </tr> </table> <p style="font-size:6px;margin-top:0px;margin-bottom:0px">  </p> <table style="BORDER-COLLAPSE:COLLAPSE" border="0" cellpadding="0" cellspacing="0" width="100%"> <tr> <td width="4%"><font size="1"> </font></td> <td width="3%" valign="top" align="left"><font style="font-family:Times New Roman" size="2">•</font></td> <td width="1%" valign="top"><font size="1"> </font></td> <td align="left" valign="top"> <p align="left"><font style="font-family:Times New Roman" size="2">wireless test (“Wireless Test”) systems; and</font></p> </td> </tr> </table> <p style="font-size:6px;margin-top:0px;margin-bottom:0px">  </p> <table style="BORDER-COLLAPSE:COLLAPSE" border="0" cellpadding="0" cellspacing="0" width="100%"> <tr> <td width="4%"><font size="1"> </font></td> <td width="3%" valign="top" align="left"><font style="font-family:Times New Roman" size="2">•</font></td> <td width="1%" valign="top"><font size="1"> </font></td> <td align="left" valign="top"> <p align="left"><font style="font-family:Times New Roman" size="2">military/aerospace (“Mil/Aero”) test instrumentation and systems, storage test (“Storage Test”) systems, and circuit-board test and inspection (“Commercial Board Test”) systems (collectively these products represent “Systems Test Group”).</font></p> </td> </tr> </table> </div>
	us-gaap	Treasury Stock Acquired Average Cost Per Share TreasuryStockAcquiredAverageCostPerShare	11.84
	us-gaap	Stock Repurchased During Period Shares StockRepurchasedDuringPeriodShares	2600000	shares
CY2010Q4	us-gaap	Stock Repurchase Program Authorized Amount StockRepurchaseProgramAuthorizedAmount	200000000
	invest	Investment Options Exercise Price InvestmentOptionsExercisePrice	5.48
	ter	Call Option Shares CallOptionShares	34700000	shares
	us-gaap	Debt Instrument Periodic Payment Principal DebtInstrumentPeriodicPaymentPrincipal	1000000
CY2011Q1	us-gaap	Stock Issued During Period Shares Employee Stock Purchase Plans StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans	800000	shares
CY2012Q1	us-gaap	Stock Issued During Period Shares Employee Stock Purchase Plans StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans	600000	shares
CY2009Q1	us-gaap	Proceeds From Warrant Exercises ProceedsFromWarrantExercises	43000000
CY2009Q1	ter	Term Of Loan TermOfLoan	5	Y
CY2009Q1	ter	Percentage Of Warrant Price In Excess Of Closing Price Of Common Stock PercentageOfWarrantPriceInExcessOfClosingPriceOfCommonStock	0.75	pure
CY2009Q1	ter	Warrants Conversion Premium Percentage WarrantsConversionPremiumPercentage	0.75	pure
CY2011Q1	us-gaap	Proceeds From Divestiture Of Businesses ProceedsFromDivestitureOfBusinesses	40200000
CY2010Q3	us-gaap	Stock Issued During Period Shares Employee Stock Purchase Plans StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans	600000	shares
CY2011Q3	us-gaap	Stock Issued During Period Shares Employee Stock Purchase Plans StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans	600000	shares
CY2012Q3	us-gaap	Stock Issued During Period Shares Employee Stock Purchase Plans StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans	600000	shares
CY2010	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	0.02
CY2010	us-gaap	Business Acquisitions Pro Forma Income Loss From Continuing Operations Before Changes In Accounting And Extraordinary Items Net Of Tax BusinessAcquisitionsProFormaIncomeLossFromContinuingOperationsBeforeChangesInAccountingAndExtraordinaryItemsNetOfTax	309549000
CY2010	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity	5128000
CY2010	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	0.03
CY2010	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	15096000
CY2010	us-gaap	Operating Income Loss OperatingIncomeLoss	414937000
CY2010	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-2528000
CY2010	us-gaap	Product Warranty Accrual Preexisting Increase Decrease ProductWarrantyAccrualPreexistingIncreaseDecrease	-1338000
CY2010	us-gaap	Sales Revenue Goods Net SalesRevenueGoodsNet	1330942000
CY2010	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	0
CY2010	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Weighted Average Remaining Contractual Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1	P1Y8M12D
CY2010	us-gaap	Income Tax Holiday Income Tax Benefits Per Share IncomeTaxHolidayIncomeTaxBenefitsPerShare	0.00
CY2010	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	2305000
CY2010	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	379692000
CY2010	us-gaap	Discontinued Operation Income Loss From Discontinued Operation Before Income Tax DiscontinuedOperationIncomeLossFromDiscontinuedOperationBeforeIncomeTax	5406000
CY2010	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	30580000
CY2010	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	389619000
CY2010	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	136837000
CY2010	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	15545000
CY2010	us-gaap	Cash Provided By Used In Operating Activities Discontinued Operations CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations	4957000
CY2010	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod	2626000	shares
CY2010	us-gaap	Proceeds From Issuance Of Shares Under Incentive And Share Based Compensation Plans Including Stock Options ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions	44679000
CY2010	us-gaap	Other Comprehensive Income Defined Benefit Plan Net Prior Service Costs Credit Arising During Period Net Of Tax OtherComprehensiveIncomeDefinedBenefitPlanNetPriorServiceCostsCreditArisingDuringPeriodNetOfTax	-3279000
CY2010	us-gaap	Business Acquisition Pro Forma Earnings Per Share Basic BusinessAcquisitionProFormaEarningsPerShareBasic	1.75
CY2010	us-gaap	Incremental Common Shares Attributable To Conversion Of Debt Securities IncrementalCommonSharesAttributableToConversionOfDebtSecurities	30848000	shares
CY2010	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Vested And Expected To Vest Outstanding Weighted Average Remaining Contractual Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageRemainingContractualTerm1	P5Y4M24D
CY2010	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	93516000
CY2010	us-gaap	Share Based Compensation ShareBasedCompensation	29777000
CY2010	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice	9.34
CY2010	us-gaap	Business Acquisitions Pro Forma Revenue BusinessAcquisitionsProFormaRevenue	1652153000
CY2010	us-gaap	Net Cash Provided By Used In Operating Activities Continuing Operations NetCashProvidedByUsedInOperatingActivitiesContinuingOperations	561329000
CY2010	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0.001	pure
CY2010	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.75
CY2010	us-gaap	Restructuring Settlement And Impairment Provisions RestructuringSettlementAndImpairmentProvisions	-3800000
CY2010	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	106000
CY2010	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	62201000
CY2010	us-gaap	Product Warranty Accrual Payments ProductWarrantyAccrualPayments	12295000
CY2010	us-gaap	Research And Development Expense Excluding Acquired In Process Cost ResearchAndDevelopmentExpenseExcludingAcquiredInProcessCost	191863000
CY2010	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	4031000	shares
CY2010	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	3280000
CY2010	us-gaap	Disposal Group Including Discontinued Operation Revenue DisposalGroupIncludingDiscontinuedOperationRevenue	42488000
CY2010	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	-1555000
CY2010	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.042	pure
CY2010	us-gaap	Entity Wide Disclosure On Geographic Areas Revenue From External Customers Attributed To Foreign Countries EntityWideDisclosureOnGeographicAreasRevenueFromExternalCustomersAttributedToForeignCountries	1566162000
CY2010	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	566286000
CY2010	us-gaap	Proceeds From Sale Of Other Investments ProceedsFromSaleOfOtherInvestments	26330000
CY2010	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-627660000
CY2010	us-gaap	Investment Income Interest InvestmentIncomeInterest	5861000
CY2010	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	8.65
CY2010	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	5128000
CY2010	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.004	pure
CY2010	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	76044000
CY2010	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	-19000000
CY2010	us-gaap	Proceeds From Life Insurance Policies ProceedsFromLifeInsurancePolicies	1091000
CY2010	us-gaap	Increase Decrease In Pension And Postretirement Obligations IncreaseDecreaseInPensionAndPostretirementObligations	-52452000
CY2010	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-3589000
CY2010	us-gaap	Inventory Write Down InventoryWriteDown	5971000
CY2010	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue	7.73
CY2010	us-gaap	Advertising Expense AdvertisingExpense	600000
CY2010	us-gaap	Increase Decrease In Deferred Revenue And Customer Advances And Deposits IncreaseDecreaseInDeferredRevenueAndCustomerAdvancesAndDeposits	72744000
CY2010	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	-8460000
CY2010	us-gaap	Other Comprehensive Income Loss Amortization Pension And Other Postretirement Benefit Plans Net Prior Service Cost Recognized In Net Periodic Pension Cost Net Of Tax OtherComprehensiveIncomeLossAmortizationPensionAndOtherPostretirementBenefitPlansNetPriorServiceCostRecognizedInNetPeriodicPensionCostNetOfTax	-310000
CY2010	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	9.39
CY2010	us-gaap	Business Acquisition Pro Forma Income Loss From Continuing Operations Before Changes In Accounting And Extraordinary Items Net Of Tax Per Share Basic BusinessAcquisitionProFormaIncomeLossFromContinuingOperationsBeforeChangesInAccountingAndExtraordinaryItemsNetOfTaxPerShareBasic	1.72
CY2010	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	226807000	shares
CY2010	us-gaap	Incremental Common Shares Attributable To Call Options And Warrants IncrementalCommonSharesAttributableToCallOptionsAndWarrants	10492000	shares
CY2010	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	50418000
CY2010	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	-349000
CY2010	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	396347000
CY2010	us-gaap	Income Tax Expense Benefit Continuing Operations IncomeTaxExpenseBenefitContinuingOperations	16655000
CY2010	us-gaap	Extended Product Warranty Accrual Warranties Issued ExtendedProductWarrantyAccrualWarrantiesIssued	7696000
CY2010	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	4799000
CY2010	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.14
CY2010	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax	2500000
CY2010	us-gaap	Product Warranty Accrual Warranties Issued ProductWarrantyAccrualWarrantiesIssued	17084000
CY2010	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	42374000
CY2010	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment For Sale Of Securities Included In Net Income Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentForSaleOfSecuritiesIncludedInNetIncomeNetOfTax	93000
CY2010	us-gaap	Discontinued Operation Tax Effect Of Discontinued Operation DiscontinuedOperationTaxEffectOfDiscontinuedOperation	278000
CY2010	us-gaap	Cost Of Revenue CostOfRevenue	708579000
CY2010	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	2.11
CY2010	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	870777000
CY2010	us-gaap	Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	-0.139	pure
CY2010	us-gaap	Additions To Noncurrent Assets AdditionsToNoncurrentAssets	76044000
CY2010	us-gaap	Gain Loss On Foreign Currency Derivative Instruments Not Designated As Hedging Instruments GainLossOnForeignCurrencyDerivativeInstrumentsNotDesignatedAsHedgingInstruments	-2289000
CY2010	us-gaap	Operating Expenses OperatingExpenses	442646000
CY2010	us-gaap	Cost Of Services CostOfServices	118688000
CY2010	us-gaap	Extended Product Warranty Accrual Payments ExtendedProductWarrantyAccrualPayments	3186000
CY2010	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeitures Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue	8.11
CY2010	us-gaap	Marketable Securities Realized Gain Loss MarketableSecuritiesRealizedGainLoss	3200000
CY2010	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	179924000	shares
CY2010	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-3715000
CY2010	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	553000
CY2010	us-gaap	Operating Leases Rent Expense Net OperatingLeasesRentExpenseNet	12900000
CY2010	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	46883000	shares
CY2010	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.350	pure
CY2010	us-gaap	Defined Benefit Plan Actuarial Gain Loss DefinedBenefitPlanActuarialGainLoss	1351000
CY2010	us-gaap	Adjustment For Amortization AdjustmentForAmortization	40706000
CY2010	us-gaap	Discontinued Operation Tax Effect Of Income Loss From Discontinued Operation During Phase Out Period DiscontinuedOperationTaxEffectOfIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriod	278000
CY2010	us-gaap	Valuation Allowance Deferred Tax Asset Change In Amount ValuationAllowanceDeferredTaxAssetChangeInAmount	60000000
CY2010	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P2Y3M18D
CY2010	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	7269000
CY2010	us-gaap	Cost Of Goods Sold CostOfGoodsSold	589891000
CY2010	us-gaap	Incremental Common Shares Attributable To Equity Unit Purchase Agreements IncrementalCommonSharesAttributableToEquityUnitPurchaseAgreements	99000	shares
CY2010	us-gaap	Revenues Revenues	1566162000
CY2010	us-gaap	Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	-0.174	pure
CY2010	us-gaap	Sales Revenue Services Net SalesRevenueServicesNet	235220000
CY2010	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	16547000
CY2010	us-gaap	Depreciation Depreciation	52810000
CY2010	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	-2091000
CY2010	us-gaap	Gross Profit GrossProfit	857583000
CY2010	us-gaap	Proceeds From Sale Of Available For Sale Securities ProceedsFromSaleOfAvailableForSaleSecurities	154903000
CY2010	us-gaap	Interest Paid InterestPaid	8695000
CY2010	us-gaap	Income Tax Reconciliation Tax Holidays IncomeTaxReconciliationTaxHolidays	0
CY2010	us-gaap	Net Cash Provided By Used In Investing Activities Continuing Operations NetCashProvidedByUsedInInvestingActivitiesContinuingOperations	-627660000
CY2010	us-gaap	Business Acquisitions Pro Forma Net Income Loss BusinessAcquisitionsProFormaNetIncomeLoss	314972000
CY2010	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-1519000
CY2010	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	2435000
CY2010	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	5300000	shares
CY2010	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	1110000
CY2010	us-gaap	Net Income Loss Attributable To Parent Diluted NetIncomeLossAttributableToParentDiluted	398023000
CY2010	us-gaap	Net Income Loss NetIncomeLoss	384820000
CY2010	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	225333000
CY2010	us-gaap	Foreign Currency Transaction Gain Loss Realized ForeignCurrencyTransactionGainLossRealized	-2300000
CY2010	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod	329000	shares
CY2010	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	352778000
CY2010	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	16655000
CY2010	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities
CY2010	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	384820000
CY2010	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	1.73
CY2010	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	1466000
CY2010	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	29250000
CY2010	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeited In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod	153000	shares
CY2010	us-gaap	Business Acquisition Pro Forma Income Loss From Continuing Operations Before Changes In Accounting And Extraordinary Items Net Of Tax Per Share Diluted BusinessAcquisitionProFormaIncomeLossFromContinuingOperationsBeforeChangesInAccountingAndExtraordinaryItemsNetOfTaxPerShareDiluted	1.42
CY2010	us-gaap	Business Acquisition Pro Forma Earnings Per Share Diluted BusinessAcquisitionProFormaEarningsPerShareDiluted	1.44
CY2010	us-gaap	Interest Expense InterestExpense	24451000
CY2010	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	4.10
CY2010	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	1559000
CY2010	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	8465000
CY2010	ter	Stock Issued During Period Value Share Based Compensation Net Of Shares Withheld For Taxes StockIssuedDuringPeriodValueShareBasedCompensationNetOfSharesWithheldForTaxes	37410000
CY2010	ter	Share Based Compensation Arrangement By Share Based Payment Award Options Cancelled In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsCancelledInPeriod	342000	shares
CY2010	ter	Other Comprehensive Income Defined Benefit Plan Net Prior Service Costs Credit Amortization And Credit Arising During Period Tax Effect OtherComprehensiveIncomeDefinedBenefitPlanNetPriorServiceCostsCreditAmortizationAndCreditArisingDuringPeriodTaxEffect	0
CY2010	ter	Book Value Of Internally Manufactured Test Systems Sold BookValueOfInternallyManufacturedTestSystemsSold	12200000
CY2010	ter	Incremental Common Shares Attributable To Conversion Of Stock Option IncrementalCommonSharesAttributableToConversionOfStockOption	443000	shares
CY2010	ter	Deferred Income Tax Expense Benefit Net Of Adjustments DeferredIncomeTaxExpenseBenefitNetOfAdjustments	1110000
CY2010	ter	Total Income Tax Provision Benefit From Continuing Operations And Discontinued Operations TotalIncomeTaxProvisionBenefitFromContinuingOperationsAndDiscontinuedOperations	16933000
CY2010	ter	Share Based Compensation Arrangement By Share Based Payment Award Options Cancelled In Period Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsCancelledInPeriodWeightedAverageExercisePrice	19.54
CY2010	ter	Segment Reporting Major Customers Percent Revenue SegmentReportingMajorCustomersPercentRevenue	0.10	pure
CY2010	ter	Incremental Common Shares Attributable To Conversion Of Restricted Stock Units IncrementalCommonSharesAttributableToConversionOfRestrictedStockUnits	5001000	shares
CY2010	ter	Income Impact Of Assumed Conversion Of Convertible Notes IncomeImpactOfAssumedConversionOfConvertibleNotes	13203000
CY2010	ter	Total Stock Based Compensation Expenses After Income Taxes TotalStockBasedCompensationExpensesAfterIncomeTaxes	29777000
CY2010	ter	Other Comprehensive Income Defined Benefit Plan Net Prior Service Costs Credits And Amortization Arising During Period Net Of Tax OtherComprehensiveIncomeDefinedBenefitPlanNetPriorServiceCostsCreditsAndAmortizationArisingDuringPeriodNetOfTax	-310000
CY2010	ter	Number Of Customer Accounted For Ten Percent Or Greater Revenue NumberOfCustomerAccountedForTenPercentOrGreaterRevenue	0	Customer
CY2011	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Weighted Average Remaining Contractual Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1	P4Y
CY2011	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	537489000
CY2011	us-gaap	Income Tax Holiday Income Tax Benefits Per Share IncomeTaxHolidayIncomeTaxBenefitsPerShare	0.00
CY2011	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	2518000
CY2011	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	0.11
CY2011	us-gaap	Business Acquisitions Pro Forma Income Loss From Continuing Operations Before Changes In Accounting And Extraordinary Items Net Of Tax BusinessAcquisitionsProFormaIncomeLossFromContinuingOperationsBeforeChangesInAccountingAndExtraordinaryItemsNetOfTax	357060000
CY2011	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity	1545000
CY2011	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	0.14
CY2011	us-gaap	Discontinued Operation Tax Effect Of Income Loss From Disposal Of Discontinued Operation DiscontinuedOperationTaxEffectOfIncomeLossFromDisposalOfDiscontinuedOperation	4578000
CY2011	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	11307000
CY2011	us-gaap	Operating Income Loss OperatingIncomeLoss	231498000
CY2011	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-1509000
CY2011	us-gaap	Product Warranty Accrual Preexisting Increase Decrease ProductWarrantyAccrualPreexistingIncreaseDecrease	-2689000
CY2011	us-gaap	Sales Revenue Goods Net SalesRevenueGoodsNet	1160191000
CY2011	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	666000
CY2011	us-gaap	Goodwill Purchase Accounting Adjustments GoodwillPurchaseAccountingAdjustments	-3506000
CY2011	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	343957000
CY2011	us-gaap	Discontinued Operation Income Loss From Discontinued Operation Before Income Tax DiscontinuedOperationIncomeLossFromDiscontinuedOperationBeforeIncomeTax	1278000
CY2011	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	32337000
CY2011	us-gaap	Cash Provided By Used In Investing Activities Discontinued Operations CashProvidedByUsedInInvestingActivitiesDiscontinuedOperations	39062000
CY2011	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	372150000
CY2011	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	518483000
CY2011	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	28422000
CY2011	us-gaap	Cash Provided By Used In Operating Activities Discontinued Operations CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations	-4804000
CY2011	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod	1936000	shares
CY2011	us-gaap	Proceeds From Issuance Of Shares Under Incentive And Share Based Compensation Plans Including Stock Options ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions	17385000
CY2011	us-gaap	Business Acquisition Pro Forma Earnings Per Share Basic BusinessAcquisitionProFormaEarningsPerShareBasic	2.07
CY2011	us-gaap	Incremental Common Shares Attributable To Conversion Of Debt Securities IncrementalCommonSharesAttributableToConversionOfDebtSecurities	21504000	shares
CY2011	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Vested And Expected To Vest Outstanding Weighted Average Remaining Contractual Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageRemainingContractualTerm1	P6Y2M12D
CY2011	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	104378000
CY2011	us-gaap	Share Based Compensation ShareBasedCompensation	32337000
CY2011	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice	16.23
CY2011	us-gaap	Business Acquisitions Pro Forma Revenue BusinessAcquisitionsProFormaRevenue	1527044000
CY2011	us-gaap	Net Cash Provided By Used In Operating Activities Continuing Operations NetCashProvidedByUsedInOperatingActivitiesContinuingOperations	278568000
CY2011	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	-0.008	pure
CY2011	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.63
CY2011	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Other EffectiveIncomeTaxRateReconciliationNondeductibleExpenseOther	0.057	pure
CY2011	us-gaap	Restructuring Settlement And Impairment Provisions RestructuringSettlementAndImpairmentProvisions	6743000
CY2011	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	6131000
CY2011	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	-48222000
CY2011	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-139929000
CY2011	us-gaap	Product Warranty Accrual Payments ProductWarrantyAccrualPayments	12538000
CY2011	us-gaap	Research And Development Expense Excluding Acquired In Process Cost ResearchAndDevelopmentExpenseExcludingAcquiredInProcessCost	197798000
CY2011	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	965000	shares
CY2011	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	1165000
CY2011	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	31175000
CY2011	us-gaap	Discontinued Operation Gain Loss From Disposal Of Discontinued Operation Before Income Tax DiscontinuedOperationGainLossFromDisposalOfDiscontinuedOperationBeforeIncomeTax	28949000
CY2011	us-gaap	Other Noncash Expense OtherNoncashExpense	12178000
CY2011	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Purchases FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityPurchases	68892000
CY2011	us-gaap	Disposal Group Including Discontinued Operation Revenue DisposalGroupIncludingDiscontinuedOperationRevenue	9086000
CY2011	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	3668000
CY2011	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	31175000
CY2011	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	-0.604	pure
CY2011	us-gaap	Product Warranty Accrual Additions From Business Acquisition ProductWarrantyAccrualAdditionsFromBusinessAcquisition	327000
CY2011	us-gaap	Entity Wide Disclosure On Geographic Areas Revenue From External Customers Attributed To Foreign Countries EntityWideDisclosureOnGeographicAreasRevenueFromExternalCustomersAttributedToForeignCountries	1429061000
CY2011	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	273764000
CY2011	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-81457000
CY2011	us-gaap	Investment Income Interest InvestmentIncomeInterest	6617000
CY2011	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-7480000
CY2011	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	4.38
CY2011	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	25916000
CY2011	us-gaap	Discontinued Operation Gain Loss On Disposal Of Discontinued Operation Net Of Tax DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax	24371000
CY2011	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	86097000
CY2011	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	175999000
CY2011	us-gaap	Increase Decrease In Pension And Postretirement Obligations IncreaseDecreaseInPensionAndPostretirementObligations	-11851000
CY2011	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-14000
CY2011	us-gaap	Inventory Write Down InventoryWriteDown	11601000
CY2011	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue	8.56
CY2011	us-gaap	Advertising Expense AdvertisingExpense	1000000
CY2011	us-gaap	Increase Decrease In Deferred Revenue And Customer Advances And Deposits IncreaseDecreaseInDeferredRevenueAndCustomerAdvancesAndDeposits	-68359000
CY2011	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	22600000
CY2011	us-gaap	Other Comprehensive Income Loss Amortization Pension And Other Postretirement Benefit Plans Net Prior Service Cost Recognized In Net Periodic Pension Cost Net Of Tax OtherComprehensiveIncomeLossAmortizationPensionAndOtherPostretirementBenefitPlansNetPriorServiceCostRecognizedInNetPeriodicPensionCostNetOfTax	-14000
CY2011	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	15.77
CY2011	us-gaap	Business Acquisition Pro Forma Income Loss From Continuing Operations Before Changes In Accounting And Extraordinary Items Net Of Tax Per Share Basic BusinessAcquisitionProFormaIncomeLossFromContinuingOperationsBeforeChangesInAccountingAndExtraordinaryItemsNetOfTaxPerShareBasic	1.93
CY2011	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	226820000	shares
CY2011	us-gaap	Incremental Common Shares Attributable To Call Options And Warrants IncrementalCommonSharesAttributableToCallOptionsAndWarrants	16224000	shares
CY2011	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-66367000
CY2011	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	2266000
CY2011	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	214421000
CY2011	us-gaap	Income Tax Expense Benefit Continuing Operations IncomeTaxExpenseBenefitContinuingOperations	-129536000
CY2011	us-gaap	Extended Product Warranty Accrual Warranties Issued ExtendedProductWarrantyAccrualWarrantiesIssued	8659000
CY2011	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	2277000
CY2011	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.00
CY2011	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax	900000
CY2011	us-gaap	Product Warranty Accrual Warranties Issued ProductWarrantyAccrualWarrantiesIssued	13167000
CY2011	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-16308000
CY2011	us-gaap	Extended Product Warranty Accrual Additions From Business Acquisition ExtendedProductWarrantyAccrualAdditionsFromBusinessAcquisition	3151000
CY2011	us-gaap	Acquisition Costs AcquisitionCosts	4600000
CY2011	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment For Sale Of Securities Included In Net Income Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentForSaleOfSecuritiesIncludedInNetIncomeNetOfTax	-1296000
CY2011	us-gaap	Discontinued Operation Tax Effect Of Discontinued Operation DiscontinuedOperationTaxEffectOfDiscontinuedOperation	4311000
CY2011	us-gaap	Cost Of Revenue CostOfRevenue	717238000
CY2011	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	1.86
CY2011	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	691802000
CY2011	us-gaap	Product Warranty Accrual Period Increase Decrease ProductWarrantyAccrualPeriodIncreaseDecrease	8200000
CY2011	us-gaap	Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	-0.126	pure
CY2011	us-gaap	Additions To Noncurrent Assets AdditionsToNoncurrentAssets	86097000
CY2011	us-gaap	Gain Loss On Foreign Currency Derivative Instruments Not Designated As Hedging Instruments GainLossOnForeignCurrencyDerivativeInstrumentsNotDesignatedAsHedgingInstruments	-1327000
CY2011	us-gaap	Operating Expenses OperatingExpenses	480325000
CY2011	us-gaap	Cost Of Services CostOfServices	138302000
CY2011	us-gaap	Extended Product Warranty Accrual Payments ExtendedProductWarrantyAccrualPayments	8040000
CY2011	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeitures Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue	9.24
CY2011	us-gaap	Marketable Securities Realized Gain Loss MarketableSecuritiesRealizedGainLoss	2700000
CY2011	us-gaap	Foreign Currency Transaction Gain Loss Unrealized ForeignCurrencyTransactionGainLossUnrealized	-300000
CY2011	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	184683000	shares
CY2011	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	615000
CY2011	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	760000
CY2011	us-gaap	Operating Leases Rent Expense Net OperatingLeasesRentExpenseNet	13400000
CY2011	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	42137000	shares
CY2011	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.350	pure
CY2011	us-gaap	Defined Benefit Plan Actuarial Gain Loss DefinedBenefitPlanActuarialGainLoss	-13564000
CY2011	us-gaap	Adjustment For Amortization AdjustmentForAmortization	53338000
CY2011	us-gaap	Discontinued Operation Tax Effect Of Income Loss From Discontinued Operation During Phase Out Period DiscontinuedOperationTaxEffectOfIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriod	-267000
CY2011	us-gaap	Valuation Allowance Deferred Tax Asset Change In Amount ValuationAllowanceDeferredTaxAssetChangeInAmount	190200000
CY2011	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P6Y4M24D
CY2011	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	12297000
CY2011	us-gaap	Cost Of Goods Sold CostOfGoodsSold	578936000
CY2011	us-gaap	Incremental Common Shares Attributable To Equity Unit Purchase Agreements IncrementalCommonSharesAttributableToEquityUnitPurchaseAgreements	70000	shares
CY2011	us-gaap	Revenues Revenues	1429061000
CY2011	us-gaap	Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	-0.877	pure
CY2011	us-gaap	Sales Revenue Services Net SalesRevenueServicesNet	268870000
CY2011	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	23994000
CY2011	us-gaap	Depreciation Depreciation	51040000
CY2011	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	36043000
CY2011	us-gaap	Gross Profit GrossProfit	711823000
CY2011	us-gaap	Extended Product Warranty Accrual Period Increase Decrease ExtendedProductWarrantyAccrualPeriodIncreaseDecrease	12700000
CY2011	us-gaap	Proceeds From Sale Of Available For Sale Securities ProceedsFromSaleOfAvailableForSaleSecurities	676386000
CY2011	us-gaap	Interest Paid InterestPaid	8645000
CY2011	us-gaap	Income Tax Reconciliation Tax Holidays IncomeTaxReconciliationTaxHolidays	200000
CY2011	us-gaap	Net Cash Provided By Used In Investing Activities Continuing Operations NetCashProvidedByUsedInInvestingActivitiesContinuingOperations	-120519000
CY2011	us-gaap	Business Acquisitions Pro Forma Net Income Loss BusinessAcquisitionsProFormaNetIncomeLoss	382976000
CY2011	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-146949000
CY2011	us-gaap	Amortization Of Debt Discount Premium AmortizationOfDebtDiscountPremium	12853000
CY2011	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	1296000
CY2011	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	700000	shares
CY2011	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	-10549000
CY2011	us-gaap	Net Income Loss Attributable To Parent Diluted NetIncomeLossAttributableToParentDiluted	369873000
CY2011	us-gaap	Net Income Loss NetIncomeLoss	369873000
CY2011	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	235319000
CY2011	us-gaap	Finite Lived Intangible Asset Useful Life FiniteLivedIntangibleAssetUsefulLife	P7Y
CY2011	us-gaap	Foreign Currency Transaction Gain Loss Realized ForeignCurrencyTransactionGainLossRealized	-1300000
CY2011	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod	145000	shares
CY2011	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-129536000
CY2011	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities
CY2011	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	369873000
CY2011	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	1.52
CY2011	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	1293000
CY2011	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	40465000
CY2011	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeited In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod	435000	shares
CY2011	us-gaap	Business Acquisition Pro Forma Income Loss From Continuing Operations Before Changes In Accounting And Extraordinary Items Net Of Tax Per Share Diluted BusinessAcquisitionProFormaIncomeLossFromContinuingOperationsBeforeChangesInAccountingAndExtraordinaryItemsNetOfTaxPerShareDiluted	1.56
CY2011	us-gaap	Business Acquisition Pro Forma Earnings Per Share Diluted BusinessAcquisitionProFormaEarningsPerShareDiluted	1.67
CY2011	us-gaap	Interest Expense InterestExpense	23694000
CY2011	us-gaap	Debt Instrument Convertible Interest Expense DebtInstrumentConvertibleInterestExpense	21403000
CY2011	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	6.74
CY2011	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	-3000
CY2011	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	-8727000
CY2011	ter	Change Of Business Acquisition Contingent Consideration At Fair Value ChangeOfBusinessAcquisitionContingentConsiderationAtFairValue	8800000
CY2011	ter	Stock Issued During Period Value Share Based Compensation Net Of Shares Withheld For Taxes StockIssuedDuringPeriodValueShareBasedCompensationNetOfSharesWithheldForTaxes	5088000
CY2011	ter	Share Based Compensation Arrangement By Share Based Payment Award Options Cancelled In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsCancelledInPeriod	3867000	shares
CY2011	ter	Restructuring And Other Charges RestructuringAndOtherCharges	5800000
CY2011	ter	Other Comprehensive Income Defined Benefit Plan Net Prior Service Costs Credit Amortization And Credit Arising During Period Tax Effect OtherComprehensiveIncomeDefinedBenefitPlanNetPriorServiceCostsCreditAmortizationAndCreditArisingDuringPeriodTaxEffect	9000
CY2011	ter	Acquired Tax Positions AcquiredTaxPositions	1388000
CY2011	ter	Book Value Of Internally Manufactured Test Systems Sold BookValueOfInternallyManufacturedTestSystemsSold	7800000
CY2011	ter	Contractual Interest Expense On Coupon ContractualInterestExpenseOnCoupon	8550000
CY2011	ter	Incremental Common Shares Attributable To Conversion Of Stock Option IncrementalCommonSharesAttributableToConversionOfStockOption	566000	shares
CY2011	ter	Stock Options Issued In Purchase Acquisition StockOptionsIssuedInPurchaseAcquisition	4472000
CY2011	ter	Deferred Income Tax Expense Benefit Net Of Adjustments DeferredIncomeTaxExpenseBenefitNetOfAdjustments	-157958000
CY2011	ter	Total Income Tax Provision Benefit From Continuing Operations And Discontinued Operations TotalIncomeTaxProvisionBenefitFromContinuingOperationsAndDiscontinuedOperations	-125225000
CY2011	ter	Share Based Compensation Arrangement By Share Based Payment Award Options Assumed From Acquisitions In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAssumedFromAcquisitionsInPeriod	2828000	shares
CY2011	ter	Share Based Compensation Arrangement By Share Based Payment Award Options Cancelled In Period Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsCancelledInPeriodWeightedAverageExercisePrice	26.38
CY2011	ter	Share Based Compensation Arrangement By Share Based Payment Award Options Assumed From Acquisition In Period Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAssumedFromAcquisitionInPeriodWeightedAverageExercisePrice	2.69
CY2011	ter	Segment Reporting Major Customers Percent Revenue SegmentReportingMajorCustomersPercentRevenue	0.10	pure
CY2011	ter	Incremental Common Shares Attributable To Conversion Of Restricted Stock Units IncrementalCommonSharesAttributableToConversionOfRestrictedStockUnits	3773000	shares
CY2011	ter	Total Stock Based Compensation Expenses After Income Taxes TotalStockBasedCompensationExpensesAfterIncomeTaxes	23828000
CY2011	ter	Other Comprehensive Income Defined Benefit Plan Net Prior Service Costs Credits And Amortization Arising During Period Net Of Tax OtherComprehensiveIncomeDefinedBenefitPlanNetPriorServiceCostsCreditsAndAmortizationArisingDuringPeriodNetOfTax	-14000
CY2011	ter	Payment For Contingent Consideration PaymentForContingentConsideration	59700000
CY2011	ter	Number Of Customer Accounted For Ten Percent Or Greater Revenue NumberOfCustomerAccountedForTenPercentOrGreaterRevenue	0	Customer
CY2012	dei	Trading Symbol TradingSymbol	TER
CY2012	dei	Entity Registrant Name EntityRegistrantName	TERADYNE, INC
CY2012	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2012	dei	Amendment Flag AmendmentFlag	false
CY2012	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2012	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2012	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2012	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2012
CY2012	dei	Document Type DocumentType	10-K
CY2012	dei	Document Period End Date DocumentPeriodEndDate	2012-12-31
CY2012	dei	Entity Central Index Key EntityCentralIndexKey	0000097210
CY2012	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
CY2012	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2012	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	17136000
CY2012	us-gaap	Operating Income Loss OperatingIncomeLoss	287368000
CY2012	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-498000
CY2012	us-gaap	Product Warranty Accrual Preexisting Increase Decrease ProductWarrantyAccrualPreexistingIncreaseDecrease	877000
CY2012	us-gaap	Sales Revenue Goods Net SalesRevenueGoodsNet	1383569000
CY2012	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	169000
CY2012	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Weighted Average Remaining Contractual Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1	P4Y10M24D
CY2012	us-gaap	Income Tax Holiday Income Tax Benefits Per Share IncomeTaxHolidayIncomeTaxBenefitsPerShare	0.05
CY2012	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	2532000
CY2012	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	217049000
CY2012	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	39920000
CY2012	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	218123000
CY2012	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	171054000
CY2012	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	40944000
CY2012	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod	1844000	shares
CY2012	us-gaap	Proceeds From Issuance Of Shares Under Incentive And Share Based Compensation Plans Including Stock Options ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions	18476000
CY2012	us-gaap	Incremental Common Shares Attributable To Conversion Of Debt Securities IncrementalCommonSharesAttributableToConversionOfDebtSecurities	22367000	shares
CY2012	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Vested And Expected To Vest Outstanding Weighted Average Remaining Contractual Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageRemainingContractualTerm1	P5Y7M6D
CY2012	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	142799000
CY2012	us-gaap	Share Based Compensation ShareBasedCompensation	39920000
CY2012	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice	16.95
CY2012	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	16.67
CY2012	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition1 EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1	P2Y
CY2012	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	230246000	shares
CY2012	us-gaap	Incremental Common Shares Attributable To Call Options And Warrants IncrementalCommonSharesAttributableToCallOptionsAndWarrants	17433000	shares
CY2012	us-gaap	Defined Benefit Plan Settlements Benefit Obligation DefinedBenefitPlanSettlementsBenefitObligation	52000000
CY2012	us-gaap	Net Cash Provided By Used In Operating Activities Continuing Operations NetCashProvidedByUsedInOperatingActivitiesContinuingOperations	404532000
CY2012	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	-0.001	pure
CY2012	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Purchase Price Of Common Stock Percent SharebasedCompensationArrangementBySharebasedPaymentAwardPurchasePriceOfCommonStockPercent	0.85	pure
CY2012	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.94
CY2012	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Other EffectiveIncomeTaxRateReconciliationNondeductibleExpenseOther	-0.028	pure
CY2012	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Forfeitures In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice	3.11
CY2012	us-gaap	Restructuring Settlement And Impairment Provisions RestructuringSettlementAndImpairmentProvisions	-7721000
CY2012	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	459000
CY2012	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	-32810000
CY2012	us-gaap	Acquired Finite Lived Intangible Assets Weighted Average Useful Life AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife	P6Y6M
CY2012	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	8158000
CY2012	us-gaap	Product Warranty Accrual Payments ProductWarrantyAccrualPayments	13948000
CY2012	us-gaap	Research And Development Expense Excluding Acquired In Process Cost ResearchAndDevelopmentExpenseExcludingAcquiredInProcessCost	251382000
CY2012	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	1396000	shares
CY2012	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	4072000
CY2012	us-gaap	Other Noncash Expense OtherNoncashExpense	6089000
CY2012	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	22695000
CY2012	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.184	pure
CY2012	us-gaap	Debt Instrument Convertible Terms Of Conversion Feature DebtInstrumentConvertibleTermsOfConversionFeature	The Notes may be converted, under certain circumstances and during certain periods, at an initial conversion rate of approximately 182.65 shares of Teradyne's common stock per $1,000 principal amount of Notes, which is equivalent to an initial conversion price of approximately $5.48, a 25% conversion premium based on the last reported sale price of $4.38 per share of Teradyne's common stock on March 31, 2009.
CY2012	us-gaap	Entity Wide Disclosure On Geographic Areas Revenue From External Customers Attributed To Foreign Countries EntityWideDisclosureOnGeographicAreasRevenueFromExternalCustomersAttributedToForeignCountries	1656750000
CY2012	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	404532000
CY2012	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-603940000
CY2012	us-gaap	Investment Income Interest InvestmentIncomeInterest	4090000
CY2012	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-6172000
CY2012	us-gaap	Debt Instrument Convertible Remaining Discount Amortization Period1 DebtInstrumentConvertibleRemainingDiscountAmortizationPeriod1	P1Y3M
CY2012	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	3.87
CY2012	us-gaap	Defined Benefit Plan Effect Of One Percentage Point Increase On Service And Interest Cost Components DefinedBenefitPlanEffectOfOnePercentagePointIncreaseOnServiceAndInterestCostComponents	16000
CY2012	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	-0.017	pure
CY2012	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	119080000
CY2012	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	-234816000
CY2012	us-gaap	Increase Decrease In Pension And Postretirement Obligations IncreaseDecreaseInPensionAndPostretirementObligations	-4778000
CY2012	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	233000
CY2012	us-gaap	Inventory Write Down InventoryWriteDown	26849000
CY2012	us-gaap	Increase Decrease In Intangible Assets Current IncreaseDecreaseInIntangibleAssetsCurrent	600000
CY2012	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue	9.29
CY2012	us-gaap	Advertising Expense AdvertisingExpense	1600000
CY2012	us-gaap	Increase Decrease In Deferred Revenue And Customer Advances And Deposits IncreaseDecreaseInDeferredRevenueAndCustomerAdvancesAndDeposits	-14627000
CY2012	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	1544000
CY2012	us-gaap	Other Comprehensive Income Loss Amortization Pension And Other Postretirement Benefit Plans Net Prior Service Cost Recognized In Net Periodic Pension Cost Net Of Tax OtherComprehensiveIncomeLossAmortizationPensionAndOtherPostretirementBenefitPlansNetPriorServiceCostRecognizedInNetPeriodicPensionCostNetOfTax	233000
CY2012	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	24093000
CY2012	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	265976000
CY2012	us-gaap	Income Tax Expense Benefit Continuing Operations IncomeTaxExpenseBenefitContinuingOperations	48927000
CY2012	us-gaap	Extended Product Warranty Accrual Warranties Issued ExtendedProductWarrantyAccrualWarrantiesIssued	22344000
CY2012	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	1074000
CY2012	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.16
CY2012	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax	4500000
CY2012	us-gaap	Product Warranty Accrual Warranties Issued ProductWarrantyAccrualWarrantiesIssued	14704000
CY2012	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-35408000
CY2012	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment For Sale Of Securities Included In Net Income Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentForSaleOfSecuritiesIncludedInNetIncomeNetOfTax	-799000
CY2012	us-gaap	Cost Of Revenue CostOfRevenue	770713000
CY2012	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	1.16
CY2012	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod	203000	shares
CY2012	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	751129000
CY2012	us-gaap	Product Warranty Accrual Period Increase Decrease ProductWarrantyAccrualPeriodIncreaseDecrease	9800000
CY2012	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Issues FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityIssues	8794000
CY2012	us-gaap	Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	-0.115	pure
CY2012	us-gaap	Additions To Noncurrent Assets AdditionsToNoncurrentAssets	119080000
CY2012	us-gaap	Gain Loss On Foreign Currency Derivative Instruments Not Designated As Hedging Instruments GainLossOnForeignCurrencyDerivativeInstrumentsNotDesignatedAsHedgingInstruments	3974000
CY2012	us-gaap	Operating Expenses OperatingExpenses	598669000
CY2012	us-gaap	Cost Of Services CostOfServices	127832000
CY2012	us-gaap	Extended Product Warranty Accrual Payments ExtendedProductWarrantyAccrualPayments	8099000
CY2012	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeitures Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue	13.32
CY2012	us-gaap	Marketable Securities Realized Gain Loss MarketableSecuritiesRealizedGainLoss	1400000
CY2012	us-gaap	Foreign Currency Transaction Gain Loss Unrealized ForeignCurrencyTransactionGainLossUnrealized	100000
CY2012	us-gaap	Lease Expiration Date1 LeaseExpirationDate1	2013-12-31
CY2012	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	186878000	shares
CY2012	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-17652000
CY2012	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	-12000
CY2012	us-gaap	Operating Leases Rent Expense Net OperatingLeasesRentExpenseNet	15500000
CY2012	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	43368000	shares
CY2012	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.350	pure
CY2012	us-gaap	Defined Benefit Plan Actuarial Gain Loss DefinedBenefitPlanActuarialGainLoss	-23320000
CY2012	us-gaap	Adjustment For Amortization AdjustmentForAmortization	87750000
CY2012	us-gaap	Valuation Allowance Deferred Tax Asset Change In Amount ValuationAllowanceDeferredTaxAssetChangeInAmount	4400000
CY2012	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P5Y8M12D
CY2012	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	11582000
CY2012	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	-8794000
CY2012	us-gaap	Cost Of Goods Sold CostOfGoodsSold	642881000
CY2012	us-gaap	Incremental Common Shares Attributable To Equity Unit Purchase Agreements IncrementalCommonSharesAttributableToEquityUnitPurchaseAgreements	64000	shares
CY2012	us-gaap	Defined Benefit Plan Effect Of One Percentage Point Decrease On Accumulated Postretirement Benefit Obligation1 DefinedBenefitPlanEffectOfOnePercentagePointDecreaseOnAccumulatedPostretirementBenefitObligation1	-302000
CY2012	us-gaap	Revenues Revenues	1656750000
CY2012	us-gaap	Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	-0.005	pure
CY2012	us-gaap	Sales Revenue Services Net SalesRevenueServicesNet	273181000
CY2012	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	18261000
CY2012	us-gaap	Depreciation Depreciation	55049000
CY2012	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	8084000
CY2012	us-gaap	Gross Profit GrossProfit	886037000
CY2012	us-gaap	Extended Product Warranty Accrual Period Increase Decrease ExtendedProductWarrantyAccrualPeriodIncreaseDecrease	27000000
CY2012	us-gaap	Proceeds From Sale Of Available For Sale Securities ProceedsFromSaleOfAvailableForSaleSecurities	95215000
CY2012	us-gaap	Defined Benefit Plan Effect Of One Percentage Point Decrease On Service And Interest Cost Components1 DefinedBenefitPlanEffectOfOnePercentagePointDecreaseOnServiceAndInterestCostComponents1	-15000
CY2012	us-gaap	Interest Paid InterestPaid	8602000
CY2012	us-gaap	Income Tax Reconciliation Tax Holidays IncomeTaxReconciliationTaxHolidays	10900000
CY2012	us-gaap	Defined Benefit Plan Effect Of One Percentage Point Increase On Accumulated Postretirement Benefit Obligation DefinedBenefitPlanEffectOfOnePercentagePointIncreaseOnAccumulatedPostretirementBenefitObligation	322000
CY2012	us-gaap	Net Cash Provided By Used In Investing Activities Continuing Operations NetCashProvidedByUsedInInvestingActivitiesContinuingOperations	-603940000
CY2012	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	5556000
CY2012	us-gaap	Amortization Of Debt Discount Premium AmortizationOfDebtDiscountPremium	14612000
CY2012	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	1402000
CY2012	us-gaap	Tax Benefit From Stock Options Exercised1 TaxBenefitFromStockOptionsExercised1	-8358000
CY2012	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	5997000
CY2012	us-gaap	Net Income Loss Attributable To Parent Diluted NetIncomeLossAttributableToParentDiluted	217049000
CY2012	us-gaap	Net Income Loss NetIncomeLoss	217049000
CY2012	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Maximum Number Of Shares Per Employee ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumNumberOfSharesPerEmployee	6000	shares
CY2012	us-gaap	Excess Tax Benefit From Share Based Compensation Financing Activities ExcessTaxBenefitFromShareBasedCompensationFinancingActivities	8358000
CY2012	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	281500000
CY2012	us-gaap	Finite Lived Intangible Asset Useful Life FiniteLivedIntangibleAssetUsefulLife	P7Y
CY2012	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Settlements FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySettlements	59710000
CY2012	us-gaap	Long Term Purchase Commitment Time Period LongTermPurchaseCommitmentTimePeriod	One year
CY2012	us-gaap	Foreign Currency Transaction Gain Loss Realized ForeignCurrencyTransactionGainLossRealized	4000000
CY2012	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod	151000	shares
CY2012	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	48927000
CY2012	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities
CY2012	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	217049000
CY2012	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	0.94
CY2012	us-gaap	Severance Costs SeveranceCosts	200000
CY2012	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	2106000
CY2012	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	73508000
CY2012	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeited In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod	204000	shares
CY2012	us-gaap	Goodwill Period Increase Decrease GoodwillPeriodIncreaseDecrease	3500000
CY2012	us-gaap	Interest Expense InterestExpense	25482000
CY2012	us-gaap	Debt Instrument Convertible Interest Expense DebtInstrumentConvertibleInterestExpense	23162000
CY2012	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	6.85
CY2012	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	1307000
CY2012	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	19804000
CY2012	ter	Convertible Note Hedges ConvertibleNoteHedges	64600000
CY2012	ter	Share Based Compensation Arrangement By Share Based Payment Award Maximum Share Value Authorized For Purchase Under Employee Stock Purchase Plan ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumShareValueAuthorizedForPurchaseUnderEmployeeStockPurchasePlan	25000
CY2012	ter	Change Of Business Acquisition Contingent Consideration At Fair Value ChangeOfBusinessAcquisitionContingentConsiderationAtFairValue	68500000
CY2012	ter	Tax Benefit From Stock Options Exercised And Vesting Of Restricted Stock Awards And Units TaxBenefitFromStockOptionsExercisedAndVestingOfRestrictedStockAwardsAndUnits	-8358000
CY2012	ter	Stock Issued During Period Value Share Based Compensation Net Of Shares Withheld For Taxes StockIssuedDuringPeriodValueShareBasedCompensationNetOfSharesWithheldForTaxes	6894000
CY2012	ter	Increase Decrease In Unrecognized Tax Benefit IncreaseDecreaseInUnrecognizedTaxBenefit	300000
CY2012	ter	Share Based Compensation Arrangement By Share Based Payment Award Options Cancelled In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsCancelledInPeriod	46000	shares
CY2012	ter	Share Based Compensation Arrangement By Share Based Payment Award Options Expiration Term ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpirationTerm	P7Y
CY2012	ter	Payment Of Contingent Consideration PaymentOfContingentConsideration	-59710000
CY2012	ter	Percentage Of Common Stock Acquired PercentageOfCommonStockAcquired	1.00	pure
CY2012	ter	Number Of Former Employees NumberOfFormerEmployees	2000	Employee
CY2012	ter	Other Comprehensive Income Defined Benefit Plan Net Prior Service Costs Credit Amortization And Credit Arising During Period Tax Effect OtherComprehensiveIncomeDefinedBenefitPlanNetPriorServiceCostsCreditAmortizationAndCreditArisingDuringPeriodTaxEffect	-134000
CY2012	ter	Convertible Common Stock Conversion Period Before Expiration ConvertibleCommonStockConversionPeriodBeforeExpiration	3	M
CY2012	ter	Book Value Of Internally Manufactured Test Systems Sold BookValueOfInternallyManufacturedTestSystemsSold	6000000
CY2012	ter	Antidilution Adjustments Of Convertible Note Hedges AntidilutionAdjustmentsOfConvertibleNoteHedges	34703196	shares
CY2012	ter	Contractual Interest Expense On Coupon ContractualInterestExpenseOnCoupon	8550000
CY2012	ter	Number Of Consecutive Trading Days Before Business Days For As Measurement Period For Conversion Of Notes NumberOfConsecutiveTradingDaysBeforeBusinessDaysForAsMeasurementPeriodForConversionOfNotes	5	D
CY2012	ter	Depreciation Over Life To Cost Of Revenues And Selling And Administrative Expenses Years DepreciationOverLifeToCostOfRevenuesAndSellingAndAdministrativeExpensesYears	6	Y
CY2012	ter	Maximum Employment Period Considered For Vesting Of Employers Contribution MaximumEmploymentPeriodConsideredForVestingOfEmployersContribution	4	Y
CY2012	ter	Consecutive Trading Days ConsecutiveTradingDays	30	D
CY2012	ter	Earnings Per Share Diluted Before Accounting Charges EarningsPerShareDilutedBeforeAccountingCharges	0.90
CY2012	ter	Net Income Before Accounting Changes NetIncomeBeforeAccountingChanges	207000000
CY2012	ter	Incremental Common Shares Attributable To Conversion Of Stock Option IncrementalCommonSharesAttributableToConversionOfStockOption	1213000	shares
CY2012	ter	Warrant Price WarrantPrice	7.67
CY2012	ter	Maximum Price Per Note For Each Day Of Measurement Period MaximumPricePerNoteForEachDayOfMeasurementPeriod	0.98	pure
CY2012	ter	Remaining Accrual For Lease Payments RemainingAccrualForLeasePayments	1100000
CY2012	ter	Percentage Of Award Vesting On First Anniversary Of Grant Date PercentageOfAwardVestingOnFirstAnniversaryOfGrantDate	1.00	pure
CY2012	ter	Deferred Income Tax Expense Benefit Net Of Adjustments DeferredIncomeTaxExpenseBenefitNetOfAdjustments	7983000
CY2012	ter	Number Of Business Days After Consecutive Trading Days For As Measurement Period For Conversion Of Notes NumberOfBusinessDaysAfterConsecutiveTradingDaysForAsMeasurementPeriodForConversionOfNotes	5	D
CY2012	ter	Unoccupied Space Subleased UnoccupiedSpaceSubleased	0.37	pure
CY2012	ter	Principal Amount Percentage PrincipalAmountPercentage	1.00	pure
CY2012	ter	Total Income Tax Provision Benefit From Continuing Operations And Discontinued Operations TotalIncomeTaxProvisionBenefitFromContinuingOperationsAndDiscontinuedOperations	48927000
CY2012	ter	Conversion Of Common Stock For Trading Days ConversionOfCommonStockForTradingDays	20	D
CY2012	ter	Conversion Value Of Notes ConversionValueOfNotes	586100000
CY2012	ter	Percentage Of Employer Contributions Vested Per Year PercentageOfEmployerContributionsVestedPerYear	0.25	pure
CY2012	ter	Share Based Compensation Arrangement By Share Based Payment Award Options Cancelled In Period Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsCancelledInPeriodWeightedAverageExercisePrice	16.21
CY2012	ter	Segment Reporting Major Customers Percent Revenue SegmentReportingMajorCustomersPercentRevenue	0.10	pure
CY2012	ter	Incremental Common Shares Attributable To Conversion Of Restricted Stock Units IncrementalCommonSharesAttributableToConversionOfRestrictedStockUnits	2291000	shares
CY2012	ter	Savings Plan Maximum Percentage Of Employees Contribution Allowable SavingsPlanMaximumPercentageOfEmployeesContributionAllowable	0.20	pure
CY2012	ter	Percent Of Increase In Conversion Price PercentOfIncreaseInConversionPrice	1.30	pure
CY2012	ter	Total Stock Based Compensation Expenses After Income Taxes TotalStockBasedCompensationExpensesAfterIncomeTaxes	30372000
CY2012	ter	Maximum Shares Can Be Purchased Under Plan At Fair Market Value MaximumSharesCanBePurchasedUnderPlanAtFairMarketValue	25000
CY2012	ter	Percentage Of Purchase Price Of Stock On Lesser Of Fair Market Value During First Day Or Last Day Of Offering Period PercentageOfPurchasePriceOfStockOnLesserOfFairMarketValueDuringFirstDayOrLastDayOfOfferingPeriod	0.85	pure
CY2012	ter	Other Comprehensive Income Defined Benefit Plan Net Prior Service Costs Credits And Amortization Arising During Period Net Of Tax OtherComprehensiveIncomeDefinedBenefitPlanNetPriorServiceCostsCreditsAndAmortizationArisingDuringPeriodNetOfTax	233000
CY2012	ter	Issuance Of Ordinary Shares Upon Exercise Of Employee Stock Options And Restricted Stock Units Shares IssuanceOfOrdinarySharesUponExerciseOfEmployeeStockOptionsAndRestrictedStockUnitsShares	300000	shares
CY2012	ter	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Remaining Contractual Term Maximum ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageRemainingContractualTermMaximum	P7Y
CY2012	ter	Common Stock Fair Market Value Percentage CommonStockFairMarketValuePercentage	0.85	pure
CY2012	ter	Restricted Stock Awards Vesting Period One Year RestrictedStockAwardsVestingPeriodOneYear	P1Y
CY2012	ter	Number Of Customer Accounted For Ten Percent Or Greater Revenue NumberOfCustomerAccountedForTenPercentOrGreaterRevenue	1	Customer
CY2012	ter	Restricted Stock Awards Vesting Period Years RestrictedStockAwardsVestingPeriodYears	P4Y
CY2012	ter	Stock Issued During Period Shares Sale Of Stock And Exercise Of Stock Options StockIssuedDuringPeriodSharesSaleOfStockAndExerciseOfStockOptions	300000	shares
CY2011Q4	us-gaap	Discontinued Operation Tax Effect Of Income Loss From Disposal Of Discontinued Operation DiscontinuedOperationTaxEffectOfIncomeLossFromDisposalOfDiscontinuedOperation	4578000
CY2011Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	-10293000
CY2011Q4	us-gaap	Sales Revenue Goods Net SalesRevenueGoodsNet	228212000
CY2011Q4	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	129071000
CY2011Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.58
CY2011Q4	us-gaap	Restructuring Settlement And Impairment Provisions RestructuringSettlementAndImpairmentProvisions	3824000
CY2011Q4	us-gaap	Research And Development Expense Excluding Acquired In Process Cost ResearchAndDevelopmentExpenseExcludingAcquiredInProcessCost	56364000
CY2011Q4	us-gaap	Investment Income Interest InvestmentIncomeInterest	878000
CY2011Q4	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	-15549000
CY2011Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.70
CY2011Q4	us-gaap	Cost Of Revenue CostOfRevenue	163025000
CY2011Q4	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	0.70
CY2011Q4	us-gaap	Operating Expenses OperatingExpenses	144260000
CY2011Q4	us-gaap	Cost Of Services CostOfServices	35548000
CY2011Q4	us-gaap	Cost Of Goods Sold CostOfGoodsSold	127477000
CY2011Q4	us-gaap	Revenues Revenues	296992000
CY2011Q4	us-gaap	Sales Revenue Services Net SalesRevenueServicesNet	68780000
CY2011Q4	us-gaap	Gross Profit GrossProfit	133967000
CY2011Q4	us-gaap	Net Income Loss NetIncomeLoss	129071000
CY2011Q4	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	64943000
CY2011Q4	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-144620000
CY2011Q4	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	0.58
CY2011Q4	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	19129000
CY2011Q4	us-gaap	Interest Expense InterestExpense	6134000
CY2011Q4	ter	Increase Decrease In Net Income IncreaseDecreaseInNetIncome	6100000
CY2011Q4	ter	Gross Profit Change GrossProfitChange	2400000
CY2011Q1	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity	1545000
CY2011Q1	us-gaap	Discontinued Operation Tax Effect Of Income Loss From Disposal Of Discontinued Operation DiscontinuedOperationTaxEffectOfIncomeLossFromDisposalOfDiscontinuedOperation	4578000
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CY2011Q1	us-gaap	Sales Revenue Goods Net SalesRevenueGoodsNet	315719000
CY2011Q1	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	70096000
CY2011Q1	us-gaap	Discontinued Operation Income Loss From Discontinued Operation Before Income Tax DiscontinuedOperationIncomeLossFromDiscontinuedOperationBeforeIncomeTax	1278000
CY2011Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.42
CY2011Q1	us-gaap	Restructuring Settlement And Impairment Provisions RestructuringSettlementAndImpairmentProvisions	413000
CY2011Q1	us-gaap	Research And Development Expense Excluding Acquired In Process Cost ResearchAndDevelopmentExpenseExcludingAcquiredInProcessCost	47144000
CY2011Q1	us-gaap	Investment Income Interest InvestmentIncomeInterest	1287000
CY2011Q1	us-gaap	Discontinued Operation Gain Loss On Disposal Of Discontinued Operation Net Of Tax DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax	25203000
CY2011Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	75582000
CY2011Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.52
CY2011Q1	us-gaap	Cost Of Revenue CostOfRevenue	184269000
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CY2011Q1	us-gaap	Operating Expenses OperatingExpenses	112421000
CY2011Q1	us-gaap	Cost Of Services CostOfServices	31389000
CY2011Q1	us-gaap	Discontinued Operation Tax Effect Of Income Loss From Discontinued Operation During Phase Out Period DiscontinuedOperationTaxEffectOfIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriod	267000
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CY2011Q1	us-gaap	Revenues Revenues	377161000
CY2011Q1	us-gaap	Sales Revenue Services Net SalesRevenueServicesNet	61442000
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CY2011Q1	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	57573000
CY2011Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	5486000
CY2011Q1	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	0.30
CY2011Q1	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	7291000
CY2011Q1	us-gaap	Interest Expense InterestExpense	6176000
CY2012Q1	us-gaap	Debt Instrument Periodic Payment Principal DebtInstrumentPeriodicPaymentPrincipal	1000000
CY2011Q2	us-gaap	Discontinued Operation Tax Effect Of Income Loss From Disposal Of Discontinued Operation DiscontinuedOperationTaxEffectOfIncomeLossFromDisposalOfDiscontinuedOperation	4578000
CY2011Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	99836000
CY2011Q2	us-gaap	Sales Revenue Goods Net SalesRevenueGoodsNet	341316000
CY2011Q2	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	88084000
CY2011Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.38
CY2011Q2	us-gaap	Restructuring Settlement And Impairment Provisions RestructuringSettlementAndImpairmentProvisions	1041000
CY2011Q2	us-gaap	Research And Development Expense Excluding Acquired In Process Cost ResearchAndDevelopmentExpenseExcludingAcquiredInProcessCost	48394000
CY2011Q2	us-gaap	Investment Income Interest InvestmentIncomeInterest	1403000
CY2011Q2	us-gaap	Discontinued Operation Gain Loss On Disposal Of Discontinued Operation Net Of Tax DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax	-832000
CY2011Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	95923000
CY2011Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.47
CY2011Q2	us-gaap	Cost Of Revenue CostOfRevenue	195929000
CY2011Q2	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	0.48
CY2011Q2	us-gaap	Operating Expenses OperatingExpenses	114754000
CY2011Q2	us-gaap	Cost Of Services CostOfServices	35438000
CY2011Q2	us-gaap	Cost Of Goods Sold CostOfGoodsSold	160491000
CY2011Q2	us-gaap	Revenues Revenues	410519000
CY2011Q2	us-gaap	Sales Revenue Services Net SalesRevenueServicesNet	69203000
CY2011Q2	us-gaap	Gross Profit GrossProfit	214590000
CY2011Q2	us-gaap	Net Income Loss NetIncomeLoss	87252000
CY2011Q2	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	58028000
CY2011Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	7839000
CY2011Q2	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	0.38
CY2011Q2	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	7291000
CY2011Q2	us-gaap	Interest Expense InterestExpense	5316000
CY2012Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	46410000
CY2012Q1	us-gaap	Sales Revenue Goods Net SalesRevenueGoodsNet	330891000
CY2012Q1	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	33564000
CY2012Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.15
CY2012Q1	us-gaap	Restructuring Settlement And Impairment Provisions RestructuringSettlementAndImpairmentProvisions	-1825000
CY2012Q1	us-gaap	Research And Development Expense Excluding Acquired In Process Cost ResearchAndDevelopmentExpenseExcludingAcquiredInProcessCost	60135000
CY2012Q1	us-gaap	Investment Income Interest InvestmentIncomeInterest	893000
CY2012Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	41244000
CY2012Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.18
CY2012Q1	us-gaap	Cost Of Revenue CostOfRevenue	205742000
CY2012Q1	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	0.18
CY2012Q1	us-gaap	Operating Expenses OperatingExpenses	144516000
CY2012Q1	us-gaap	Cost Of Services CostOfServices	31741000
CY2012Q1	us-gaap	Cost Of Goods Sold CostOfGoodsSold	174001000
CY2012Q1	us-gaap	Revenues Revenues	396668000
CY2012Q1	us-gaap	Sales Revenue Services Net SalesRevenueServicesNet	65777000
CY2012Q1	us-gaap	Gross Profit GrossProfit	190926000
CY2012Q1	us-gaap	Net Income Loss NetIncomeLoss	33564000
CY2012Q1	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	67777000
CY2012Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	7680000
CY2012Q1	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	0.15
CY2012Q1	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	18429000
CY2012Q1	us-gaap	Interest Expense InterestExpense	6059000
CY2012Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	157441000
CY2012Q2	us-gaap	Sales Revenue Goods Net SalesRevenueGoodsNet	480578000
CY2012Q2	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	111387000
CY2012Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.49
CY2012Q2	us-gaap	Restructuring Settlement And Impairment Provisions RestructuringSettlementAndImpairmentProvisions	-6262000
CY2012Q2	us-gaap	Research And Development Expense Excluding Acquired In Process Cost ResearchAndDevelopmentExpenseExcludingAcquiredInProcessCost	66532000
CY2012Q2	us-gaap	Investment Income Interest InvestmentIncomeInterest	874000
CY2012Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	151992000
CY2012Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.60
CY2012Q2	us-gaap	Cost Of Revenue CostOfRevenue	238778000
CY2012Q2	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	0.60
CY2012Q2	us-gaap	Operating Expenses OperatingExpenses	152065000
CY2012Q2	us-gaap	Cost Of Services CostOfServices	32280000
CY2012Q2	us-gaap	Cost Of Goods Sold CostOfGoodsSold	206498000
CY2012Q2	us-gaap	Revenues Revenues	548284000
CY2012Q2	us-gaap	Sales Revenue Services Net SalesRevenueServicesNet	67706000
CY2012Q2	us-gaap	Gross Profit GrossProfit	309506000
CY2012Q2	us-gaap	Net Income Loss NetIncomeLoss	111387000
CY2012Q2	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	73366000
CY2012Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	40605000
CY2012Q2	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	0.49
CY2012Q2	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	18429000
CY2012Q2	us-gaap	Interest Expense InterestExpense	6323000
CY2011Q3	us-gaap	Discontinued Operation Tax Effect Of Income Loss From Disposal Of Discontinued Operation DiscontinuedOperationTaxEffectOfIncomeLossFromDisposalOfDiscontinuedOperation	4578000
CY2011Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	61484000
CY2011Q3	us-gaap	Sales Revenue Goods Net SalesRevenueGoodsNet	274944000
CY2011Q3	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	56706000
CY2011Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.26
CY2011Q3	us-gaap	Restructuring Settlement And Impairment Provisions RestructuringSettlementAndImpairmentProvisions	1465000
CY2011Q3	us-gaap	Research And Development Expense Excluding Acquired In Process Cost ResearchAndDevelopmentExpenseExcludingAcquiredInProcessCost	45896000
CY2011Q3	us-gaap	Investment Income Interest InvestmentIncomeInterest	3049000
CY2011Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	58465000
CY2011Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.31
CY2011Q3	us-gaap	Cost Of Revenue CostOfRevenue	174015000
CY2011Q3	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	0.31
CY2011Q3	us-gaap	Operating Expenses OperatingExpenses	108890000
CY2011Q3	us-gaap	Cost Of Services CostOfServices	35927000
CY2011Q3	us-gaap	Cost Of Goods Sold CostOfGoodsSold	138088000
CY2011Q3	us-gaap	Revenues Revenues	344389000
CY2011Q3	us-gaap	Sales Revenue Services Net SalesRevenueServicesNet	69445000
CY2011Q3	us-gaap	Gross Profit GrossProfit	170374000
CY2011Q3	us-gaap	Net Income Loss NetIncomeLoss	56706000
CY2011Q3	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	54775000
CY2011Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	1759000
CY2011Q3	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	0.26
CY2011Q3	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	6754000
CY2011Q3	us-gaap	Interest Expense InterestExpense	6068000
CY2012Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	108112000
CY2012Q3	us-gaap	Sales Revenue Goods Net SalesRevenueGoodsNet	393037000
CY2012Q3	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	88641000
CY2012Q3	us-gaap	Restructuring And Related Cost Number Of Positions Eliminated RestructuringAndRelatedCostNumberOfPositionsEliminated	9	Employee
CY2012Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.39
CY2012Q3	us-gaap	Restructuring Settlement And Impairment Provisions RestructuringSettlementAndImpairmentProvisions	683000
CY2012Q3	us-gaap	Research And Development Expense Excluding Acquired In Process Cost ResearchAndDevelopmentExpenseExcludingAcquiredInProcessCost	63055000
CY2012Q3	us-gaap	Investment Income Interest InvestmentIncomeInterest	1067000
CY2012Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	103025000
CY2012Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.47
CY2012Q3	us-gaap	Cost Of Revenue CostOfRevenue	203194000
CY2012Q3	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	0.47
CY2012Q3	us-gaap	Operating Expenses OperatingExpenses	152088000
CY2012Q3	us-gaap	Cost Of Services CostOfServices	33412000
CY2012Q3	us-gaap	Cost Of Goods Sold CostOfGoodsSold	169782000
CY2012Q3	us-gaap	Revenues Revenues	463394000
CY2012Q3	us-gaap	Sales Revenue Services Net SalesRevenueServicesNet	70357000
CY2012Q3	us-gaap	Gross Profit GrossProfit	260200000
CY2012Q3	us-gaap	Net Income Loss NetIncomeLoss	88641000
CY2012Q3	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	69921000
CY2012Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	14384000
CY2012Q3	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	0.39
CY2012Q3	us-gaap	Severance Costs SeveranceCosts	700000
CY2012Q3	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	18429000
CY2012Q3	us-gaap	Interest Expense InterestExpense	6154000
CY2012Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	-24595000
CY2012Q4	us-gaap	Sales Revenue Goods Net SalesRevenueGoodsNet	179063000
CY2012Q4	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	-16543000
CY2012Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.09
CY2012Q4	us-gaap	Restructuring Settlement And Impairment Provisions RestructuringSettlementAndImpairmentProvisions	-317000
CY2012Q4	us-gaap	Research And Development Expense Excluding Acquired In Process Cost ResearchAndDevelopmentExpenseExcludingAcquiredInProcessCost	61660000
CY2012Q4	us-gaap	Investment Income Interest InvestmentIncomeInterest	1256000
CY2012Q4	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	-30285000
CY2012Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.09
CY2012Q4	us-gaap	Cost Of Revenue CostOfRevenue	122999000
CY2012Q4	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	-0.09
CY2012Q4	us-gaap	Operating Expenses OperatingExpenses	150000000
CY2012Q4	us-gaap	Cost Of Services CostOfServices	30400000
CY2012Q4	us-gaap	Cost Of Goods Sold CostOfGoodsSold	92599000
CY2012Q4	us-gaap	Revenues Revenues	248404000
CY2012Q4	us-gaap	Sales Revenue Services Net SalesRevenueServicesNet	69341000
CY2012Q4	us-gaap	Gross Profit GrossProfit	125405000
CY2012Q4	us-gaap	Net Income Loss NetIncomeLoss	-16543000
CY2012Q4	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	70436000
CY2012Q4	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-13742000
CY2012Q4	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	-0.09
CY2012Q4	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	18221000
CY2012Q4	us-gaap	Interest Expense InterestExpense	6946000
CY2012Q4	ter	Total Income Tax Provision Benefit From Continuing Operations And Discontinued Operations TotalIncomeTaxProvisionBenefitFromContinuingOperationsAndDiscontinuedOperations	200000

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2011 Q4 Form 10-K Financial Statement

#000119312513087821 Filed on March 01, 2013

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$TER TERADYNE, INC Stock $ter

2011 Q4 Form 10-K Financial Statement

#000119312513087821 Filed on March 01, 2013

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$TER
TERADYNE, INC Stock $ter