XML 87 R49.htm IDEA: XBRL DOCUMENT
v2.4.1.9

Schedule of Available for Sale Marketable Securities (Detail) (USD $) In Thousands, unless otherwise specified | Apr. 05, 2015 | Dec. 31, 2014
--- | --- | ---
Schedule of Available-for-sale Securities |  |
Available-for-sale marketable securities, Cost | $ 1,045,974 us-gaap_AvailableForSaleSecuritiesAmortizedCost | $ 1,000,625 us-gaap_AvailableForSaleSecuritiesAmortizedCost
Available-for-sale marketable securities, Unrealized Gain | 6,297 us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax | 4,818 us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax
Available-for-sale marketable securities, Unrealized (Loss) | (330)us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax | (867)us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax
Available-for-sale marketable securities, Fair Market Value | 1,051,941 us-gaap_AvailableForSaleSecurities | 1,004,576 us-gaap_AvailableForSaleSecurities
Available-for-sale marketable securities, Fair Market Value of Investment with Unrealized Losses | 319,060 us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue | 583,076 us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue
U.S. Treasury Securities |  |
Schedule of Available-for-sale Securities |  |
Available-for-sale marketable securities, Cost | 426,637 us-gaap_AvailableForSaleSecuritiesAmortizedCost / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = us-gaap_USTreasurySecuritiesMember | 402,197 us-gaap_AvailableForSaleSecuritiesAmortizedCost / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = us-gaap_USTreasurySecuritiesMember
Available-for-sale marketable securities, Unrealized Gain | 625 us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = us-gaap_USTreasurySecuritiesMember | 362 us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = us-gaap_USTreasurySecuritiesMember
Available-for-sale marketable securities, Unrealized (Loss) | (143)us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = us-gaap_USTreasurySecuritiesMember | (405)us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = us-gaap_USTreasurySecuritiesMember
Available-for-sale marketable securities, Fair Market Value | 427,119 us-gaap_AvailableForSaleSecurities / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = us-gaap_USTreasurySecuritiesMember | 402,154 us-gaap_AvailableForSaleSecurities / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = us-gaap_USTreasurySecuritiesMember
Available-for-sale marketable securities, Fair Market Value of Investment with Unrealized Losses | 217,722 us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = us-gaap_USTreasurySecuritiesMember | 317,771 us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = us-gaap_USTreasurySecuritiesMember
U.S. Government Agency Securities |  |
Schedule of Available-for-sale Securities |  |
Available-for-sale marketable securities, Cost | 231,747 us-gaap_AvailableForSaleSecuritiesAmortizedCost / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = us-gaap_USGovernmentCorporationsAndAgenciesSecuritiesMember | 258,452 us-gaap_AvailableForSaleSecuritiesAmortizedCost / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = us-gaap_USGovernmentCorporationsAndAgenciesSecuritiesMember
Available-for-sale marketable securities, Unrealized Gain | 443 us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = us-gaap_USGovernmentCorporationsAndAgenciesSecuritiesMember | 135 us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = us-gaap_USGovernmentCorporationsAndAgenciesSecuritiesMember
Available-for-sale marketable securities, Unrealized (Loss) | (3)us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = us-gaap_USGovernmentCorporationsAndAgenciesSecuritiesMember | (85)us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = us-gaap_USGovernmentCorporationsAndAgenciesSecuritiesMember
Available-for-sale marketable securities, Fair Market Value | 232,187 us-gaap_AvailableForSaleSecurities / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = us-gaap_USGovernmentCorporationsAndAgenciesSecuritiesMember | 258,502 us-gaap_AvailableForSaleSecurities / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = us-gaap_USGovernmentCorporationsAndAgenciesSecuritiesMember
Available-for-sale marketable securities, Fair Market Value of Investment with Unrealized Losses | 15,032 us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = us-gaap_USGovernmentCorporationsAndAgenciesSecuritiesMember | 104,642 us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = us-gaap_USGovernmentCorporationsAndAgenciesSecuritiesMember
Corporate Debt Securities |  |
Schedule of Available-for-sale Securities |  |
Available-for-sale marketable securities, Cost | 158,051 us-gaap_AvailableForSaleSecuritiesAmortizedCost / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = us-gaap_CorporateDebtSecuritiesMember | 139,374 us-gaap_AvailableForSaleSecuritiesAmortizedCost / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = us-gaap_CorporateDebtSecuritiesMember
Available-for-sale marketable securities, Unrealized Gain | 2,986 us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = us-gaap_CorporateDebtSecuritiesMember | 2,414 us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = us-gaap_CorporateDebtSecuritiesMember
Available-for-sale marketable securities, Unrealized (Loss) | (160)us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = us-gaap_CorporateDebtSecuritiesMember | (321)us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = us-gaap_CorporateDebtSecuritiesMember
Available-for-sale marketable securities, Fair Market Value | 160,877 us-gaap_AvailableForSaleSecurities / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = us-gaap_CorporateDebtSecuritiesMember | 141,467 us-gaap_AvailableForSaleSecurities / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = us-gaap_CorporateDebtSecuritiesMember
Available-for-sale marketable securities, Fair Market Value of Investment with Unrealized Losses | 51,495 us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = us-gaap_CorporateDebtSecuritiesMember | 96,998 us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = us-gaap_CorporateDebtSecuritiesMember
Commercial Paper |  |
Schedule of Available-for-sale Securities |  |
Available-for-sale marketable securities, Cost | 130,227 us-gaap_AvailableForSaleSecuritiesAmortizedCost / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = us-gaap_CommercialPaperMember | 140,616 us-gaap_AvailableForSaleSecuritiesAmortizedCost / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = us-gaap_CommercialPaperMember
Available-for-sale marketable securities, Unrealized Gain | 72 us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = us-gaap_CommercialPaperMember | 26 us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = us-gaap_CommercialPaperMember
Available-for-sale marketable securities, Unrealized (Loss) | (1)us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = us-gaap_CommercialPaperMember | (4)us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = us-gaap_CommercialPaperMember
Available-for-sale marketable securities, Fair Market Value | 130,298 us-gaap_AvailableForSaleSecurities / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = us-gaap_CommercialPaperMember | 140,638 us-gaap_AvailableForSaleSecurities / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = us-gaap_CommercialPaperMember
Available-for-sale marketable securities, Fair Market Value of Investment with Unrealized Losses | 8,945 us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = us-gaap_CommercialPaperMember | 41,747 us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = us-gaap_CommercialPaperMember
Certificates of Deposit and Time Deposits |  |
Schedule of Available-for-sale Securities |  |
Available-for-sale marketable securities, Cost | 87,043 us-gaap_AvailableForSaleSecuritiesAmortizedCost / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = us-gaap_CertificatesOfDepositMember | 49,048 us-gaap_AvailableForSaleSecuritiesAmortizedCost / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = us-gaap_CertificatesOfDepositMember
Available-for-sale marketable securities, Unrealized Gain | 24 us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = us-gaap_CertificatesOfDepositMember | 11 us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = us-gaap_CertificatesOfDepositMember
Available-for-sale marketable securities, Unrealized (Loss) | (15)us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = us-gaap_CertificatesOfDepositMember | (23)us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = us-gaap_CertificatesOfDepositMember
Available-for-sale marketable securities, Fair Market Value | 87,052 us-gaap_AvailableForSaleSecurities / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = us-gaap_CertificatesOfDepositMember | 49,036 us-gaap_AvailableForSaleSecurities / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = us-gaap_CertificatesOfDepositMember
Available-for-sale marketable securities, Fair Market Value of Investment with Unrealized Losses | 25,705 us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = us-gaap_CertificatesOfDepositMember | 20,684 us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = us-gaap_CertificatesOfDepositMember
Equity And Debt Mutual Funds |  |
Schedule of Available-for-sale Securities |  |
Available-for-sale marketable securities, Cost | 11,823 us-gaap_AvailableForSaleSecuritiesAmortizedCost / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = ter_EquityAndDebtMutualFundsMember | 10,492 us-gaap_AvailableForSaleSecuritiesAmortizedCost / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = ter_EquityAndDebtMutualFundsMember
Available-for-sale marketable securities, Unrealized Gain | 2,147 us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = ter_EquityAndDebtMutualFundsMember | 1,870 us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = ter_EquityAndDebtMutualFundsMember
Available-for-sale marketable securities, Unrealized (Loss) | (8)us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = ter_EquityAndDebtMutualFundsMember | (29)us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = ter_EquityAndDebtMutualFundsMember
Available-for-sale marketable securities, Fair Market Value | 13,962 us-gaap_AvailableForSaleSecurities / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = ter_EquityAndDebtMutualFundsMember | 12,333 us-gaap_AvailableForSaleSecurities / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = ter_EquityAndDebtMutualFundsMember
Available-for-sale marketable securities, Fair Market Value of Investment with Unrealized Losses | 161 us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = ter_EquityAndDebtMutualFundsMember | 1,234 us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = ter_EquityAndDebtMutualFundsMember
Non-U.S. Government Securities |  |
Schedule of Available-for-sale Securities |  |
Available-for-sale marketable securities, Cost | 446 us-gaap_AvailableForSaleSecuritiesAmortizedCost / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = us-gaap_ForeignCorporateDebtSecuritiesMember | 446 us-gaap_AvailableForSaleSecuritiesAmortizedCost / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = us-gaap_ForeignCorporateDebtSecuritiesMember
Available-for-sale marketable securities, Fair Market Value | $ 446 us-gaap_AvailableForSaleSecurities / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = us-gaap_ForeignCorporateDebtSecuritiesMember | $ 446 us-gaap_AvailableForSaleSecurities / us-gaap_EligibleItemOrGroupForFairValueOptionAxis = us-gaap_ForeignCorporateDebtSecuritiesMember

X
- Definition Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 25 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=28360136&loc=d3e22054-111558 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (aa) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27232-111563 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6871852&loc=d3e26610-111562 + Details
Name: | us-gaap_AvailableForSaleSecurities
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount before tax of unrealized gain in accumulated other comprehensive income (AOCI) on investments in debt and equity securities classified as available-for-sale. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27161-111563 + Details
Name: | us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount before tax of unrealized loss in accumulated other comprehensive income (AOCI) on investments in debt and equity securities classified as available-for-sale. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27161-111563 + Details
Name: | us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition This item represents the cost of debt and equity securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.2) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_AvailableForSaleSecuritiesAmortizedCost
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition This item represents the aggregate fair value of investments in debt and equity securities in an unrealized loss position which are categorized neither as held-to-maturity nor trading securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27290-111563 + Details
Name: | us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_EligibleItemOrGroupForFairValueOptionAxis=ter_EquityAndDebtMutualFundsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_EligibleItemOrGroupForFairValueOptionAxis=us-gaap_CertificatesOfDepositMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_EligibleItemOrGroupForFairValueOptionAxis=us-gaap_CommercialPaperMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_EligibleItemOrGroupForFairValueOptionAxis=us-gaap_CorporateDebtSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_EligibleItemOrGroupForFairValueOptionAxis=us-gaap_ForeignCorporateDebtSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_EligibleItemOrGroupForFairValueOptionAxis=us-gaap_USGovernmentCorporationsAndAgenciesSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_EligibleItemOrGroupForFairValueOptionAxis=us-gaap_USTreasurySecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |