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v2.4.1.9

Schedule of Restructuring and Other Net (Detail) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2014
Restructuring Cost and Reserve |  |  |
Ending balance |  |  | $ 394 us-gaap_RestructuringReserve
Pre-2012 Activities |  |  |
Restructuring Cost and Reserve |  |  |
Beginning Balance | 1,084 us-gaap_RestructuringReserve / us-gaap_RestructuringPlanAxis = ter_PreTwentyTwelveRestrictedStockUnitsMember |  |
Change in estimate | (553)us-gaap_RestructuringReserveAccrualAdjustment / us-gaap_RestructuringPlanAxis = ter_PreTwentyTwelveRestrictedStockUnitsMember |  |
Cash payments | (531)us-gaap_PaymentsForRestructuring / us-gaap_RestructuringPlanAxis = ter_PreTwentyTwelveRestrictedStockUnitsMember |  |
Q2 2012 Activity |  |  |
Restructuring Cost and Reserve |  |  |
Provision |  | 286 us-gaap_RestructuringCharges / us-gaap_RestructuringPlanAxis = ter_SecondQuarterTwentyTwelveRestructuringPlanMember |
Change in estimate |  | (4)us-gaap_RestructuringReserveAccrualAdjustment / us-gaap_RestructuringPlanAxis = ter_SecondQuarterTwentyTwelveRestructuringPlanMember |
Cash payments |  | (282)us-gaap_PaymentsForRestructuring / us-gaap_RestructuringPlanAxis = ter_SecondQuarterTwentyTwelveRestructuringPlanMember |
Q3 2012 Activity |  |  |
Restructuring Cost and Reserve |  |  |
Beginning Balance | 243 us-gaap_RestructuringReserve / us-gaap_RestructuringPlanAxis = ter_ThirdQuarterTwentyTwelveRestructuringPlanMember |  |
Provision |  | 687 us-gaap_RestructuringCharges / us-gaap_RestructuringPlanAxis = ter_ThirdQuarterTwentyTwelveRestructuringPlanMember |
Cash payments | (243)us-gaap_PaymentsForRestructuring / us-gaap_RestructuringPlanAxis = ter_ThirdQuarterTwentyTwelveRestructuringPlanMember | (444)us-gaap_PaymentsForRestructuring / us-gaap_RestructuringPlanAxis = ter_ThirdQuarterTwentyTwelveRestructuringPlanMember |
Ending balance |  | 243 us-gaap_RestructuringReserve / us-gaap_RestructuringPlanAxis = ter_ThirdQuarterTwentyTwelveRestructuringPlanMember |
Q3 2013 Activity |  |  |
Restructuring Cost and Reserve |  |  |
Beginning Balance |  |  | 371 us-gaap_RestructuringReserve / us-gaap_RestructuringPlanAxis = ter_ThirdQuarterTwentyThirteenRestructuringPlanMember
Provision | 1,337 us-gaap_RestructuringCharges / us-gaap_RestructuringPlanAxis = ter_ThirdQuarterTwentyThirteenRestructuringPlanMember |  |
Cash payments | (966)us-gaap_PaymentsForRestructuring / us-gaap_RestructuringPlanAxis = ter_ThirdQuarterTwentyThirteenRestructuringPlanMember |  | (371)us-gaap_PaymentsForRestructuring / us-gaap_RestructuringPlanAxis = ter_ThirdQuarterTwentyThirteenRestructuringPlanMember
Ending balance | 371 us-gaap_RestructuringReserve / us-gaap_RestructuringPlanAxis = ter_ThirdQuarterTwentyThirteenRestructuringPlanMember |  |
Q4 2013 Activity |  |  |
Restructuring Cost and Reserve |  |  |
Beginning Balance |  |  | 114 us-gaap_RestructuringReserve / us-gaap_RestructuringPlanAxis = ter_FourthQuarterTwentyThirteenRestructuringPlanMember
Provision | 600 us-gaap_RestructuringCharges / us-gaap_RestructuringPlanAxis = ter_FourthQuarterTwentyThirteenRestructuringPlanMember |  |
Cash payments | (486)us-gaap_PaymentsForRestructuring / us-gaap_RestructuringPlanAxis = ter_FourthQuarterTwentyThirteenRestructuringPlanMember |  | (114)us-gaap_PaymentsForRestructuring / us-gaap_RestructuringPlanAxis = ter_FourthQuarterTwentyThirteenRestructuringPlanMember
Ending balance | 114 us-gaap_RestructuringReserve / us-gaap_RestructuringPlanAxis = ter_FourthQuarterTwentyThirteenRestructuringPlanMember |  |
Q2 2014 Activity |  |  |
Restructuring Cost and Reserve |  |  |
Provision |  |  | 572 us-gaap_RestructuringCharges / us-gaap_RestructuringPlanAxis = ter_SecondQuarterTwentyFourteenRestructuringPlanMember
Cash payments |  |  | (572)us-gaap_PaymentsForRestructuring / us-gaap_RestructuringPlanAxis = ter_SecondQuarterTwentyFourteenRestructuringPlanMember
Q3 2014 Activity |  |  |
Restructuring Cost and Reserve |  |  |
Provision |  |  | 225 us-gaap_RestructuringCharges / us-gaap_RestructuringPlanAxis = ter_ThirdQuarterTwentyFourteenRestructuringPlanMember
Cash payments |  |  | (225)us-gaap_PaymentsForRestructuring / us-gaap_RestructuringPlanAxis = ter_ThirdQuarterTwentyFourteenRestructuringPlanMember
Q4 2014 Activity |  |  |
Restructuring Cost and Reserve |  |  |
Provision |  |  | 826 us-gaap_RestructuringCharges / us-gaap_RestructuringPlanAxis = ter_FourthQuarterTwentyFourteenRestructuringPlanMember
Cash payments |  |  | (432)us-gaap_PaymentsForRestructuring / us-gaap_RestructuringPlanAxis = ter_FourthQuarterTwentyFourteenRestructuringPlanMember
Ending balance |  |  | 394 us-gaap_RestructuringReserve / us-gaap_RestructuringPlanAxis = ter_FourthQuarterTwentyFourteenRestructuringPlanMember
Severance and Benefits |  |  |
Restructuring Cost and Reserve |  |  |
Ending balance |  |  | 394 us-gaap_RestructuringReserve / us-gaap_RestructuringCostAndReserveAxis = ter_EmployeeSeveranceAndBenefitsMember
Severance and Benefits | Q2 2012 Activity |  |  |
Restructuring Cost and Reserve |  |  |
Provision |  | 286 us-gaap_RestructuringCharges / us-gaap_RestructuringCostAndReserveAxis = ter_EmployeeSeveranceAndBenefitsMember / us-gaap_RestructuringPlanAxis = ter_SecondQuarterTwentyTwelveRestructuringPlanMember |
Change in estimate |  | (4)us-gaap_RestructuringReserveAccrualAdjustment / us-gaap_RestructuringCostAndReserveAxis = ter_EmployeeSeveranceAndBenefitsMember / us-gaap_RestructuringPlanAxis = ter_SecondQuarterTwentyTwelveRestructuringPlanMember |
Cash payments |  | (282)us-gaap_PaymentsForRestructuring / us-gaap_RestructuringCostAndReserveAxis = ter_EmployeeSeveranceAndBenefitsMember / us-gaap_RestructuringPlanAxis = ter_SecondQuarterTwentyTwelveRestructuringPlanMember |
Severance and Benefits | Q3 2012 Activity |  |  |
Restructuring Cost and Reserve |  |  |
Beginning Balance | 243 us-gaap_RestructuringReserve / us-gaap_RestructuringCostAndReserveAxis = ter_EmployeeSeveranceAndBenefitsMember / us-gaap_RestructuringPlanAxis = ter_ThirdQuarterTwentyTwelveRestructuringPlanMember |  |
Provision |  | 687 us-gaap_RestructuringCharges / us-gaap_RestructuringCostAndReserveAxis = ter_EmployeeSeveranceAndBenefitsMember / us-gaap_RestructuringPlanAxis = ter_ThirdQuarterTwentyTwelveRestructuringPlanMember |
Cash payments | (243)us-gaap_PaymentsForRestructuring / us-gaap_RestructuringCostAndReserveAxis = ter_EmployeeSeveranceAndBenefitsMember / us-gaap_RestructuringPlanAxis = ter_ThirdQuarterTwentyTwelveRestructuringPlanMember | (444)us-gaap_PaymentsForRestructuring / us-gaap_RestructuringCostAndReserveAxis = ter_EmployeeSeveranceAndBenefitsMember / us-gaap_RestructuringPlanAxis = ter_ThirdQuarterTwentyTwelveRestructuringPlanMember |
Ending balance |  | 243 us-gaap_RestructuringReserve / us-gaap_RestructuringCostAndReserveAxis = ter_EmployeeSeveranceAndBenefitsMember / us-gaap_RestructuringPlanAxis = ter_ThirdQuarterTwentyTwelveRestructuringPlanMember |
Severance and Benefits | Q3 2013 Activity |  |  |
Restructuring Cost and Reserve |  |  |
Beginning Balance |  |  | 371 us-gaap_RestructuringReserve / us-gaap_RestructuringCostAndReserveAxis = ter_EmployeeSeveranceAndBenefitsMember / us-gaap_RestructuringPlanAxis = ter_ThirdQuarterTwentyThirteenRestructuringPlanMember
Provision | 1,337 us-gaap_RestructuringCharges / us-gaap_RestructuringCostAndReserveAxis = ter_EmployeeSeveranceAndBenefitsMember / us-gaap_RestructuringPlanAxis = ter_ThirdQuarterTwentyThirteenRestructuringPlanMember |  |
Cash payments | (966)us-gaap_PaymentsForRestructuring / us-gaap_RestructuringCostAndReserveAxis = ter_EmployeeSeveranceAndBenefitsMember / us-gaap_RestructuringPlanAxis = ter_ThirdQuarterTwentyThirteenRestructuringPlanMember |  | (371)us-gaap_PaymentsForRestructuring / us-gaap_RestructuringCostAndReserveAxis = ter_EmployeeSeveranceAndBenefitsMember / us-gaap_RestructuringPlanAxis = ter_ThirdQuarterTwentyThirteenRestructuringPlanMember
Ending balance | 371 us-gaap_RestructuringReserve / us-gaap_RestructuringCostAndReserveAxis = ter_EmployeeSeveranceAndBenefitsMember / us-gaap_RestructuringPlanAxis = ter_ThirdQuarterTwentyThirteenRestructuringPlanMember |  |
Severance and Benefits | Q4 2013 Activity |  |  |
Restructuring Cost and Reserve |  |  |
Beginning Balance |  |  | 114 us-gaap_RestructuringReserve / us-gaap_RestructuringCostAndReserveAxis = ter_EmployeeSeveranceAndBenefitsMember / us-gaap_RestructuringPlanAxis = ter_FourthQuarterTwentyThirteenRestructuringPlanMember
Provision | 600 us-gaap_RestructuringCharges / us-gaap_RestructuringCostAndReserveAxis = ter_EmployeeSeveranceAndBenefitsMember / us-gaap_RestructuringPlanAxis = ter_FourthQuarterTwentyThirteenRestructuringPlanMember |  |
Cash payments | (486)us-gaap_PaymentsForRestructuring / us-gaap_RestructuringCostAndReserveAxis = ter_EmployeeSeveranceAndBenefitsMember / us-gaap_RestructuringPlanAxis = ter_FourthQuarterTwentyThirteenRestructuringPlanMember |  | (114)us-gaap_PaymentsForRestructuring / us-gaap_RestructuringCostAndReserveAxis = ter_EmployeeSeveranceAndBenefitsMember / us-gaap_RestructuringPlanAxis = ter_FourthQuarterTwentyThirteenRestructuringPlanMember
Ending balance | 114 us-gaap_RestructuringReserve / us-gaap_RestructuringCostAndReserveAxis = ter_EmployeeSeveranceAndBenefitsMember / us-gaap_RestructuringPlanAxis = ter_FourthQuarterTwentyThirteenRestructuringPlanMember |  |
Severance and Benefits | Q2 2014 Activity |  |  |
Restructuring Cost and Reserve |  |  |
Provision |  |  | 572 us-gaap_RestructuringCharges / us-gaap_RestructuringCostAndReserveAxis = ter_EmployeeSeveranceAndBenefitsMember / us-gaap_RestructuringPlanAxis = ter_SecondQuarterTwentyFourteenRestructuringPlanMember
Cash payments |  |  | (572)us-gaap_PaymentsForRestructuring / us-gaap_RestructuringCostAndReserveAxis = ter_EmployeeSeveranceAndBenefitsMember / us-gaap_RestructuringPlanAxis = ter_SecondQuarterTwentyFourteenRestructuringPlanMember
Severance and Benefits | Q3 2014 Activity |  |  |
Restructuring Cost and Reserve |  |  |
Provision |  |  | 225 us-gaap_RestructuringCharges / us-gaap_RestructuringCostAndReserveAxis = ter_EmployeeSeveranceAndBenefitsMember / us-gaap_RestructuringPlanAxis = ter_ThirdQuarterTwentyFourteenRestructuringPlanMember
Cash payments |  |  | (225)us-gaap_PaymentsForRestructuring / us-gaap_RestructuringCostAndReserveAxis = ter_EmployeeSeveranceAndBenefitsMember / us-gaap_RestructuringPlanAxis = ter_ThirdQuarterTwentyFourteenRestructuringPlanMember
Severance and Benefits | Q4 2014 Activity |  |  |
Restructuring Cost and Reserve |  |  |
Provision |  |  | 826 us-gaap_RestructuringCharges / us-gaap_RestructuringCostAndReserveAxis = ter_EmployeeSeveranceAndBenefitsMember / us-gaap_RestructuringPlanAxis = ter_FourthQuarterTwentyFourteenRestructuringPlanMember
Cash payments |  |  | (432)us-gaap_PaymentsForRestructuring / us-gaap_RestructuringCostAndReserveAxis = ter_EmployeeSeveranceAndBenefitsMember / us-gaap_RestructuringPlanAxis = ter_FourthQuarterTwentyFourteenRestructuringPlanMember
Ending balance |  |  | 394 us-gaap_RestructuringReserve / us-gaap_RestructuringCostAndReserveAxis = ter_EmployeeSeveranceAndBenefitsMember / us-gaap_RestructuringPlanAxis = ter_FourthQuarterTwentyFourteenRestructuringPlanMember
Facility Exit Costs | Pre-2012 Activities |  |  |
Restructuring Cost and Reserve |  |  |
Beginning Balance | 1,084 us-gaap_RestructuringReserve / us-gaap_RestructuringCostAndReserveAxis = us-gaap_FacilityClosingMember / us-gaap_RestructuringPlanAxis = ter_PreTwentyTwelveRestrictedStockUnitsMember |  |
Change in estimate | (553)us-gaap_RestructuringReserveAccrualAdjustment / us-gaap_RestructuringCostAndReserveAxis = us-gaap_FacilityClosingMember / us-gaap_RestructuringPlanAxis = ter_PreTwentyTwelveRestrictedStockUnitsMember |  |
Cash payments | $ (531)us-gaap_PaymentsForRestructuring / us-gaap_RestructuringCostAndReserveAxis = us-gaap_FacilityClosingMember / us-gaap_RestructuringPlanAxis = ter_PreTwentyTwelveRestrictedStockUnitsMember |  |

X
- Definition Amount of cash payments made as the result of exit or disposal activities. Excludes payments associated with a discontinued operation or an asset retirement obligation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 + Details
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X
- Definition Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB TOPIC 5.P.4(b)) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140904-122747 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 5.P.3) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140864-122747 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 5 -Section P -Subsection 3, 4 + Details
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- Definition Carrying amount (including both current and noncurrent portions of the accrual) as of the balance sheet date pertaining to a specified type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB TOPIC 5.P.4(b)) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140904-122747 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 5 -Section P -Subsection 3, 4 + Details
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X
- Definition Amount of any reversal and other adjustment made during the period to the amount of a previously accrued liability for a specified type of restructuring cost, excluding adjustments for costs incurred during the period, costs settled during the period, and foreign currency translation adjustments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB TOPIC 5.P.4(b)) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140904-122747 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 5 -Section P -Subsection 3, 4 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 40 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6394291&loc=d3e17658-110867 + Details
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