XML 82 R67.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Long-Term Debt - Narrative (Details) | Jul. 30, 2018 USD ($) | Sep. 30, 2018 USD ($) | Sep. 30, 2018 AUD ($)
--- | --- | --- | ---
Long-term debt |  |  |
Weighted-average rate including the effects of interest rate swap agreement (as a percent) |  | 3.28% | 3.28%
Amount outstanding under credit facility |  | $ 277,100,000 |
Standby Letters of Credit |  |  |
Long-term debt |  |  |
Maximum borrowing capacity |  |  | $ 30,000,000
Letters of credit outstanding |  | 29,800,000 |
Amount outstanding under credit facility |  | 0 |
Multicurrency borrowings and letter of credit |  |  |
Long-term debt |  |  |
Letters of credit outstanding |  | 4,300,000 |
Bank guarantees |  |  |
Long-term debt |  |  |
Amount outstanding under credit facility |  | 7,100,000 |
Amended Credit Agreement |  |  |
Long-term debt |  |  |
Accordion feature, higher borrowing capacity option | $ 1,000,000,000 |  |
Maximum borrowing capacity | $ 700,000,000 |  |
Debt instrument term | 5 years |  |
Accordion feature, increase limit | $ 300,000,000 |  |
Annual principal payment, amortization percentage | 5.00% |  |
Borrowings outstanding |  | $ 277,100,000 |
Weighted-average interest rate (as a percent) |  | 3.27% | 3.27%
Debt covenant, maximum consolidated leverage ratio | 3.00 |  |
Debt covenant, minimum consolidated interest coverage ratio | 3.00 |  |
Amended Credit Agreement | Federal Funds Effective Swap Rate |  |  |
Long-term debt |  |  |
Basis spread on variable rate | 0.50% |  |
Amended Credit Agreement | Term Loan Facility |  |  |
Long-term debt |  |  |
Maximum borrowing capacity | $ 250,000,000 |  |
Borrowings outstanding |  | $ 250,000,000 |
Amended Credit Agreement | Revolving Credit Facility |  |  |
Long-term debt |  |  |
Maximum borrowing capacity | $ 450,000,000 |  |
Borrowings outstanding |  | 27,100,000 |
Amount available for borrowing under facility |  | 422,000,000 |
Amended Credit Agreement | Revolving Credit Facility | Eurodollar | Minimum |  |  |
Long-term debt |  |  |
Basis spread on variable rate | 1.00% |  |
Amended Credit Agreement | Revolving Credit Facility | Eurodollar | Maximum |  |  |
Long-term debt |  |  |
Basis spread on variable rate | 1.75% |  |
Amended Credit Agreement | Revolving Credit Facility | Prime Rate or Eurodollar Rate |  |  |
Long-term debt |  |  |
Basis spread on variable rate | 1.00% |  |
Amended Credit Agreement | Revolving Credit Facility | Prime Rate or Eurodollar Rate | Minimum |  |  |
Long-term debt |  |  |
Basis spread on variable rate | 0.00% |  |
Amended Credit Agreement | Revolving Credit Facility | Prime Rate or Eurodollar Rate | Maximum |  |  |
Long-term debt |  |  |
Basis spread on variable rate | 0.75% |  |
Amended Credit Agreement | Standby Letters of Credit |  |  |
Long-term debt |  |  |
Maximum borrowing capacity | $ 100,000,000 |  |
Letters of credit outstanding |  | $ 900,000 |
Amended Credit Agreement | Bridge Loan |  |  |
Long-term debt |  |  |
Maximum borrowing capacity | 20,000,000 |  |
Amended Credit Agreement | Multicurrency borrowings and letter of credit |  |  |
Long-term debt |  |  |
Maximum borrowing capacity | $ 200,000,000 |  |
Credit Agreement |  |  |
Long-term debt |  |  |
Consolidated leverage ratio |  | 1.23 | 1.23
Consolidated fixed charge coverage ratio |  | 15.42 | 15.42

X
- Definition Debt Instrument, Annual Principal Payment, Amortization Percentage + References No definition available. + Details
Name: | ttek_DebtInstrumentAnnualPrincipalPaymentAmortizationPercentage
Namespace Prefix: | ttek_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Line Of Credit Facility, Accordion Feature, Higher Borrowing Capacity Option + References No definition available. + Details
Name: | ttek_LineOfCreditFacilityAccordionFeatureHigherBorrowingCapacityOption
Namespace Prefix: | ttek_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Line Of Credit Facility, Accordion Feature, Increase Limit + References No definition available. + Details
Name: | ttek_LineOfCreditFacilityAccordionFeatureIncreaseLimit
Namespace Prefix: | ttek_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Line Of Credit Facility, Covenant, Consolidated Interest Coverage Ratio, Minimum + References No definition available. + Details
Name: | ttek_LineOfCreditFacilityCovenantConsolidatedInterestCoverageRatioMinimum
Namespace Prefix: | ttek_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | instant

X
- Definition Line Of Credit Facility, Covenant, Consolidated Leverage Ratio, Maximum + References No definition available. + Details
Name: | ttek_LineOfCreditFacilityCovenantConsolidatedLeverageRatioMaximum
Namespace Prefix: | ttek_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | instant

X
- Definition Weighted average interest rate of long-term debt outstanding including the effects of interest rate swap agreement. + References No definition available. + Details
Name: | ttek_LongTermDebtWeightedAverageInterestRateIncludingEffectsOfInterestRateSwap
Namespace Prefix: | ttek_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Represents the consolidated fixed charge coverage ratio as defined by the loan agreement. + References No definition available. + Details
Name: | ttek_RatioOfConsolidatedFixedChargeCoverageRatio
Namespace Prefix: | ttek_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | instant

X
- Definition Percentage points added to the reference rate to compute the variable rate on the debt instrument. + References No definition available. + Details
Name: | us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
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_DebtInstrumentLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Period of time between issuance and maturity of debt instrument, 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_DebtInstrumentTerm
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition The total amount of the contingent obligation under letters of credit outstanding as of the reporting date. + References No definition available. + Details
Name: | us-gaap_LettersOfCreditOutstandingAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(16)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
Name: | us-gaap_LineOfCredit
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (b)(3) -URI http://asc.fasb.org/extlink&oid=109500613&loc=SL6031897-161870 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(16)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_LongTermDebt
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Weighted average interest rate of long-term debt outstanding calculated at point in time. + References No definition available. + Details
Name: | us-gaap_LongtermDebtWeightedAverageInterestRate
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Indebtedness divided by net capital. + References No definition available. + Details
Name: | us-gaap_RatioOfIndebtednessToNetCapital1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_CreditFacilityAxis=us-gaap_StandbyLettersOfCreditMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CreditFacilityAxis=ttek_LineOfCreditMulticurrencyBorrowingsAndLettersOfCreditMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CreditFacilityAxis=us-gaap_SecuredDebtMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=ttek_AmendedCreditAgreementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_VariableRateAxis=us-gaap_FederalFundsEffectiveSwapRateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CreditFacilityAxis=ttek_TermLoanFacilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CreditFacilityAxis=us-gaap_RevolvingCreditFacilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_VariableRateAxis=us-gaap_EurodollarMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_VariableRateAxis=ttek_PrimeRateOrEurodollarRateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CreditFacilityAxis=us-gaap_BridgeLoanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=ttek_CreditAgreementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |