XML 62 R50.htm IDEA: XBRL DOCUMENT
v3.7.0.1

Derivative Financial Instruments - General Information (Details) $ in Thousands | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Dec. 29, 2013 item | Jul. 02, 2017 USD ($) | Sep. 29, 2013 item
Interest rate swap agreements | Designated as cash flow hedges | Derivatives designated as hedging instruments |  |  |
Derivative Financial Instruments |  |  |
Number of derivative agreements | item | 2 |  | 3
Period of reclassification from accumulated other comprehensive income (loss) to interest expense |  | 12 months |
Interest rate swap agreement bearing fixed rate 1.36% |  |  |
Derivative Financial Instruments |  |  |
Notional Amount |  | $ 41,320 |
Fixed Rate (as a percent) |  | 1.36% |
Interest rate swap agreement bearing fixed rate 1.34% |  |  |
Derivative Financial Instruments |  |  |
Notional Amount |  | $ 41,320 |
Fixed Rate (as a percent) |  | 1.34% |
Interest rate swap agreement bearing fixed rate 1.35% |  |  |
Derivative Financial Instruments |  |  |
Notional Amount |  | $ 41,320 |
Fixed Rate (as a percent) |  | 1.35% |
Interest rate swap agreement bearing fixed rate 1.23% |  |  |
Derivative Financial Instruments |  |  |
Notional Amount |  | $ 20,660 |
Fixed Rate (as a percent) |  | 1.23% |
Interest rate swap agreement bearing fixed rate 1.24% |  |  |
Derivative Financial Instruments |  |  |
Notional Amount |  | $ 20,660 |
Fixed Rate (as a percent) |  | 1.24% |

X
- Definition Aggregate notional amount specified by the derivative(s). Expressed as an absolute value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B + Details
Name: | invest_DerivativeNotionalAmount
Namespace Prefix: | invest_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | instant

X
- Definition Represents the number of derivative agreements entered into by the entity during the reporting period. + References No definition available. + Details
Name: | ttek_DerivativeNumberOfAgreementsEnteredIntoByEntity
Namespace Prefix: | ttek_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Fixed interest rate related to the interest rate derivative. + References No definition available. + Details
Name: | us-gaap_DerivativeFixedInterestRate
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Estimated period for the anticipated transfer of gain (loss), net, from accumulated other comprehensive income into earnings, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
Name: | us-gaap_DerivativeInstrumentsGainLossReclassificationFromAccumulatedOCIToIncomeEstimateOfTimeToTransfer1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_DerivativeLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=us-gaap_InterestRateSwapMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis=us-gaap_CashFlowHedgingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_HedgingDesignationAxis=us-gaap_DesignatedAsHedgingInstrumentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=ttek_InterestRateSwapAgreementBearingFixedRate1.36PercentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=ttek_InterestRateSwapAgreementBearingFixedRate1.34PercentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=ttek_InterestRateSwapAgreementBearingFixedRate1.35PercentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=ttek_InterestRateSwapAgreementBearingFixedRate1.23PercentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=ttek_InterestRateSwapAgreementBearingFixedRate1.24PercentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |