XML 45 R33.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Mergers and Acquisitions - Narrative (Details) | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Apr. 01, 2018 USD ($) employee | Dec. 31, 2017 USD ($) employee | Apr. 02, 2017 USD ($) employee | Mar. 27, 2016 USD ($) | Apr. 01, 2018 USD ($) | Apr. 02, 2017 USD ($) | Oct. 02, 2016 USD ($)
Mergers and Acquisitions |  |  |  |  |  |  |
Contingent earn-out liability | $ 30,100,000 |  |  |  | $ 30,100,000 |  |
Aggregate maximum of contingent consideration | $ 43,400,000 |  |  |  | 43,400,000 |  |
Increase (decrease) in contingent consideration |  |  |  |  | 1,900,000 | $ (7,100,000) |
Gain (loss) on change in contingent consideration |  |  |  |  | $ (1,900,000) | 7,100,000 |
Minimum |  |  |  |  |  |  |
Mergers and Acquisitions |  |  |  |  |  |  |
Earn-out period |  |  |  |  | 2 years |  |
Minimum | Existing customer contracts |  |  |  |  |  |  |
Mergers and Acquisitions |  |  |  |  |  |  |
Useful life of intangible assets |  |  |  |  | 1 year |  |
Minimum | Trade names |  |  |  |  |  |  |
Mergers and Acquisitions |  |  |  |  |  |  |
Useful life of intangible assets |  |  |  |  | 3 years |  |
Maximum |  |  |  |  |  |  |
Mergers and Acquisitions |  |  |  |  |  |  |
Earn-out period |  |  |  |  | 3 years |  |
Maximum | Existing customer contracts |  |  |  |  |  |  |
Mergers and Acquisitions |  |  |  |  |  |  |
Useful life of intangible assets |  |  |  |  | 10 years |  |
Maximum | Trade names |  |  |  |  |  |  |
Mergers and Acquisitions |  |  |  |  |  |  |
Useful life of intangible assets |  |  |  |  | 5 years |  |
Norman Disney & Young |  |  |  |  |  |  |
Mergers and Acquisitions |  |  |  |  |  |  |
Number of employees acquired in acquisition | employee | 700 |  |  |  |  |  |
Fair value of acquisition purchase price | $ 56,100,000 |  |  |  |  |  |
Cash paid to the former owners | 46,300,000 |  |  |  |  |  |
Amount held in escrow | 1,600,000 |  |  |  | $ 1,600,000 |  |
Purchase price payable | 600,000 |  |  |  |  |  |
Contingent earn-out liability | 7,600,000 |  |  |  | 7,600,000 |  |
Aggregate maximum of contingent consideration | $ 20,200,000 |  |  |  | $ 20,200,000 |  |
Earn-out period | 3 years |  |  |  |  |  |
Glumac |  |  |  |  |  |  |
Mergers and Acquisitions |  |  |  |  |  |  |
Number of employees acquired in acquisition | employee |  | 300 |  |  |  |  |
Fair value of acquisition purchase price |  | $ 38,400,000 |  |  |  |  |
Cash paid to the former owners |  | 19,000,000 |  |  |  |  |
Amount held in escrow |  | 1,000,000 |  |  |  |  |
Contingent earn-out liability |  | 18,400,000 |  |  |  |  |
Aggregate maximum of contingent consideration |  | $ 20,000,000 |  |  |  |  |
Earn-out period |  | 3 years |  |  |  |  |
Eco Logical Australia |  |  |  |  |  |  |
Mergers and Acquisitions |  |  |  |  |  |  |
Number of employees acquired in acquisition | employee |  |  | 160 |  |  |  |
Fair value of acquisition purchase price |  |  | $ 9,900,000 |  |  |  |
Cash paid to the former owners |  |  | 8,300,000 |  |  |  |
Contingent earn-out liability |  |  | 1,600,000 |  |  | 1,600,000 |
Aggregate maximum of contingent consideration |  |  | $ 1,700,000 |  |  | 1,700,000 |
Earn-out period |  |  | 2 years |  |  |  |
INDUS |  |  |  |  |  |  |
Mergers and Acquisitions |  |  |  |  |  |  |
Contingent earn-out liability |  |  | $ 0 | $ 4,700,000 |  | 0 | $ 4,900,000
Aggregate maximum of contingent consideration |  |  |  | $ 8,000,000 |  |  |
Earn-out period |  |  |  | 2 years |  |  |
Increase (decrease) in contingent consideration |  |  |  |  |  | (5,000,000) |
Gain (loss) on change in contingent consideration |  |  | 5,000,000 |  |  | 5,000,000 |
Potential earn-out to be paid each year |  |  |  | $ 4,000,000 |  |  |
Estimated potential earn-out (as a percent) |  |  |  | 50.00% |  |  | 59.00%
Minimum operating income threshold to earn contingent consideration during year one |  |  | 3,200,000 | $ 3,200,000 |  |  |
Minimum operating income threshold to earn contingent consideration during year two |  |  | $ 3,600,000 | 3,600,000 |  |  |
Operating income to earn maximum consideration during the first year |  |  |  | 3,600,000 |  |  |
Operating income to earn maximum consideration during the second year |  |  |  | $ 4,000,000 |  |  |
CEG |  |  |  |  |  |  |
Mergers and Acquisitions |  |  |  |  |  |  |
Increase (decrease) in contingent consideration |  |  |  |  |  | (2,100,000) |
Gain (loss) on change in contingent consideration |  |  |  |  |  | $ 2,100,000 |

X
- Definition Represents the information pertaining to the earn out payment made to the acquired entity each year under agreement. + References No definition available. + Details
Name: | ttek_BusinessAcquisitionContingentConsiderationActualCashPaymentPerYear
Namespace Prefix: | ttek_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Represents the information pertaining to the estimated percentage of the potential earn out as determined by the acquiring entity. + References No definition available. + Details
Name: | ttek_BusinessAcquisitionContingentConsiderationEstimatedPotentialEarnOut
Namespace Prefix: | ttek_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the information pertaining to the gain (loss) on change in the value of contingent consideration for the period. + References No definition available. + Details
Name: | ttek_BusinessAcquisitionContingentConsiderationGainLossOnChangeInValueOfConsideration
Namespace Prefix: | ttek_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Represents the information pertaining to the minimum operating income threshold to be earned during the first year. + References No definition available. + Details
Name: | ttek_BusinessAcquisitionContingentConsiderationMinimumOperatingIncomeThresholdYearOne
Namespace Prefix: | ttek_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Represents the information pertaining to the minimum operating income threshold to be earned during the second year. + References No definition available. + Details
Name: | ttek_BusinessAcquisitionContingentConsiderationMinimumOperatingIncomeThresholdYearTwo
Namespace Prefix: | ttek_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Represents the information pertaining to the operating income to be earned to receive maximum consideration during the first year. + References No definition available. + Details
Name: | ttek_BusinessAcquisitionContingentConsiderationOperatingIncomeToEarnMaximumConsiderationYearOne
Namespace Prefix: | ttek_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Represents the information pertaining to the operating income to be earned to receive maximum consideration during the second year. + References No definition available. + Details
Name: | ttek_BusinessAcquisitionContingentConsiderationOperatingIncomeToEarnMaximumConsiderationYearTwo
Namespace Prefix: | ttek_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Represents the earn out period for operating income projection used for fair value measurement. + References No definition available. + Details
Name: | ttek_BusinessAcquisitionEarnOutPeriodForOperatingIncomeProjectionsUsedInFairValueMeasurement
Namespace Prefix: | ttek_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the number of employees acquired in the acquisition. + References No definition available. + Details
Name: | ttek_NumberOfEmployeesAcquiredInAcquisition
Namespace Prefix: | ttek_
Data Type: | xbrli:integerItemType
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_BusinessAcquisitionLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6578-128477 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6613-128477 + Details
Name: | us-gaap_BusinessCombinationConsiderationTransferred1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of liabilities incurred by the acquirer as part of consideration transferred in a business combination. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 25 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6911189&loc=d3e6405-128476 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6578-128477 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6613-128477 + Details
Name: | us-gaap_BusinessCombinationConsiderationTransferredLiabilitiesIncurred
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of increase (decrease) in the value of a contingent consideration liability, including, but not limited to, differences arising upon settlement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 4 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e7008-128479 + Details
Name: | us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition For contingent consideration arrangements recognized in connection with a business combination, this element represents an estimate of the high-end of the potential range (undiscounted) of the consideration which may be paid. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (c)(3) -URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479 + Details
Name: | us-gaap_BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of liability recognized arising from contingent consideration in a business combination. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 35 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6911338&loc=d3e6819-128478 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 25 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6911189&loc=d3e6408-128476 + Details
Name: | us-gaap_BusinessCombinationContingentConsiderationLiability
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The designation of funds furnished by a borrower to a lender to assure future payments of the borrower's real estate taxes and insurance obligations with respect to a mortgaged property. Escrow deposits may be made for a variety of other purposes such as earnest money and contingent payments. This element excludes replacement reserves which are an escrow separately provided for within the US GAAP taxonomy. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.10) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
Name: | us-gaap_EscrowDeposit
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Useful life of finite-lived intangible assets, 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_FiniteLivedIntangibleAssetUsefulLife
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3213-108585 + Details
Name: | us-gaap_PaymentsToAcquireBusinessesGross
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_CustomerContractsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_TradeNamesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=ttek_NormanDisneyAndYoungMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=ttek_GlumacMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=ttek_EcoLogicalAustraliaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=ttek_IndusCorporationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=ttek_CornerstoneEnvironmentalGroupLLCMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |