$TTEK
TETRA TECH INC Stock $ttek

$ttek Overview Financials Valuation SEC Filings Company Website

2013 Q2 Form 10-Q Financial Statement

#000110465913062313 Filed on August 09, 2013

Income Statement

Concept	2013 Q2	2012 Q3
Revenue	$614.8M	$719.4M
YoY Change	-1.52%	6.77%
Cost Of Revenue	$469.4M	$419.1M
YoY Change	20.7%	5.94%
Gross Profit	$5.700M	$97.70M
YoY Change	-93.52%	15.08%
Gross Profit Margin	0.93%	13.58%
Selling, General & Admin	$56.70M	$51.50M
YoY Change	8.21%	13.19%
% of Gross Profit	994.74%	52.71%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$8.090M	$6.077M
YoY Change	19.08%	-57.2%
% of Gross Profit	141.93%	6.22%
Operating Expenses	$49.00M	$51.50M
YoY Change	-6.49%	13.19%
Operating Profit	-$99.88M	$48.47M
YoY Change	-381.02%	23.0%
Interest Expense	$2.010M	$1.419M
YoY Change	38.33%	-183.47%
% of Operating Profit		2.93%
Other Income/Expense, Net
YoY Change
Pretax Income	-$101.9M	$44.84M
YoY Change	-398.9%	18.94%
Income Tax	-$23.78M	$15.67M
% Of Pretax Income		34.95%
Net Earnings	-$78.12M	$29.17M
YoY Change	-449.96%	22.55%
Net Earnings / Revenue	-12.71%	4.05%
Basic Earnings Per Share	-$1.21	$0.48
Diluted Earnings Per Share	-$1.21	$0.47
COMMON SHARES
Basic Shares Outstanding	64.83M shares	63.62M shares
Diluted Shares Outstanding	64.83M shares	64.40M shares

Balance Sheet

Concept	2013 Q2	2012 Q3
SHORT-TERM ASSETS
Cash & Short-Term Investments	$146.3M	$140.7M
YoY Change	38.02%	42.99%
Cash & Equivalents	$146.3M	$104.8M
Short-Term Investments
Other Short-Term Assets	$46.40M	$49.10M
YoY Change	-25.52%	-7.36%
Inventory
Prepaid Expenses
Receivables	$604.3M	$700.5M
Other Receivables	$53.60M	$27.20M
Total Short-Term Assets	$850.6M	$859.3M
YoY Change	3.39%	3.54%
LONG-TERM ASSETS
Property, Plant & Equipment	$87.38M	$74.31M
YoY Change	20.69%	-7.81%
Goodwill	$710.3M	$636.0M
YoY Change
Intangibles	$94.75M	$74.23M
YoY Change
Long-Term Investments	$2.733M	$3.279M
YoY Change	-24.08%	-3.56%
Other Assets	$25.71M	$23.94M
YoY Change	5.35%	8.33%
Total Long-Term Assets	$920.9M	$811.7M
YoY Change	22.23%	9.41%
TOTAL ASSETS
Total Short-Term Assets	$850.6M	$859.3M
Total Long-Term Assets	$920.9M	$811.7M
Total Assets	$1.772B	$1.671B
YoY Change	12.4%	6.31%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$133.1M	$154.0M
YoY Change	-5.88%	-16.48%
Accrued Expenses	$118.7M	$122.4M
YoY Change	22.12%	1.58%
Deferred Revenue
YoY Change
Short-Term Debt	$0.00	$0.00
YoY Change
Long-Term Debt Due	$4.000M	$2.300M
YoY Change	81.82%	-17.86%
Total Short-Term Liabilities	$462.2M	$503.8M
YoY Change	-0.53%	-1.49%
LONG-TERM LIABILITIES
Long-Term Debt	$208.4M	$140.5M
YoY Change	93.14%	24.67%
Other Long-Term Liabilities	$29.06M	$25.92M
YoY Change	-18.6%	-50.15%
Total Long-Term Liabilities	$29.06M	$25.92M
YoY Change	-79.76%	-84.26%
TOTAL LIABILITIES
Total Short-Term Liabilities	$462.2M	$503.8M
Total Long-Term Liabilities	$29.06M	$25.92M
Total Liabilities	$491.3M	$529.7M
YoY Change	-22.91%	-26.21%
SHAREHOLDERS EQUITY
Retained Earnings	$527.0M	$554.3M
YoY Change
Common Stock	$458.1M	$433.6M
YoY Change
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$976.1M	$1.019B
YoY Change
Total Liabilities & Shareholders Equity	$1.772B	$1.671B
YoY Change	12.4%	6.31%

Cashflow Statement

Concept	2013 Q2	2012 Q3
OPERATING ACTIVITIES
Net Income	-$78.12M	$29.17M
YoY Change	-449.96%	22.55%
Depreciation, Depletion And Amortization	$8.090M	$6.077M
YoY Change	19.08%	-57.2%
Cash From Operating Activities	$53.30M	$56.80M
YoY Change	61.03%	1.79%
INVESTING ACTIVITIES
Capital Expenditures	-$6.900M	-$6.900M
YoY Change	102.94%	68.29%
Acquisitions
YoY Change
Other Investing Activities	$200.0K	-$49.80M
YoY Change	-150.0%	173.63%
Cash From Investing Activities	-$6.600M	-$56.70M
YoY Change	73.68%	154.26%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-58.10M	35.50M
YoY Change	91.75%	-234.47%
NET CHANGE
Cash From Operating Activities	53.30M	56.80M
Cash From Investing Activities	-6.600M	-56.70M
Cash From Financing Activities	-58.10M	35.50M
Net Change In Cash	-11.40M	35.60M
YoY Change	1040.0%	401.41%
FREE CASH FLOW
Cash From Operating Activities	$53.30M	$56.80M
Capital Expenditures	-$6.900M	-$6.900M
Free Cash Flow	$60.20M	$63.70M
YoY Change	64.93%	6.34%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
	ttek	Business Acquisition Contingent Consideration Actual Cash Payment Reported As Cash Flows From Operating Activities BusinessAcquisitionContingentConsiderationActualCashPaymentReportedAsCashFlowsFromOperatingActivities	400000	USD
	ttek	Business Acquisition Contingent Consideration Actual Cash Payment Reported As Cash Flows From Operating Activities BusinessAcquisitionContingentConsiderationActualCashPaymentReportedAsCashFlowsFromOperatingActivities	600000	USD
CY2013Q2	us-gaap	Investment Income Interest InvestmentIncomeInterest	400000	USD
	us-gaap	Investment Income Interest InvestmentIncomeInterest	800000	USD
CY2012Q3	us-gaap	Investment Income Interest InvestmentIncomeInterest	200000	USD
	us-gaap	Investment Income Interest InvestmentIncomeInterest	600000	USD
CY2012Q3	us-gaap	Billed Contract Receivables BilledContractReceivables	362331000	USD
CY2013Q2	us-gaap	Billed Contract Receivables BilledContractReceivables	353299000	USD
CY2012Q3	us-gaap	Unbilled Contracts Receivable UnbilledContractsReceivable	355793000	USD
CY2013Q2	us-gaap	Unbilled Contracts Receivable UnbilledContractsReceivable	295411000	USD
CY2012Q3	us-gaap	Contract Receivable Retainage ContractReceivableRetainage	17908000	USD
CY2013Q2	us-gaap	Contract Receivable Retainage ContractReceivableRetainage	27892000	USD
CY2012Q3	us-gaap	Accounts Receivable Gross Current AccountsReceivableGrossCurrent	736032000	USD
CY2013Q2	us-gaap	Accounts Receivable Gross Current AccountsReceivableGrossCurrent	676602000	USD
CY2012Q3	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	35552000	USD
CY2013Q2	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	44382000	USD
CY2012Q3	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	700480000	USD
CY2012Q3	us-gaap	Billings In Excess Of Cost Current BillingsInExcessOfCostCurrent	90909000	USD
CY2013Q2	us-gaap	Billings In Excess Of Cost Current BillingsInExcessOfCostCurrent	85352000	USD
CY2012Q3	us-gaap	Billings In Excess Of Cost Noncurrent BillingsInExcessOfCostNoncurrent	4410000	USD
CY2012Q3	us-gaap	Billings In Excess Of Cost BillingsInExcessOfCost	95319000	USD
CY2013Q2	us-gaap	Billings In Excess Of Cost BillingsInExcessOfCost	85352000	USD
	ttek	Unbilled Contracts Receivable Period For Billing And Collection UnbilledContractsReceivablePeriodForBillingAndCollection	P12M
CY2012Q3	ttek	Government Contract Receivable Unbilled Amounts Related To Claims And Requests For Equitable Adjustment On Contract GovernmentContractReceivableUnbilledAmountsRelatedToClaimsAndRequestsForEquitableAdjustmentOnContract	21000000	USD
	ttek	Billings In Excess Of Cost Period For Revenue Recognition BillingsInExcessOfCostPeriodForRevenueRecognition	P12M
CY2012Q3	ttek	Government Contract Receivable Billed Amounts GovernmentContractReceivableBilledAmounts	65900000	USD
CY2013Q2	us-gaap	Government Contract Receivable Unbilled Amounts GovernmentContractReceivableUnbilledAmounts	67200000	USD
	ttek	Concentration Risk Number Of Clients ConcentrationRiskNumberOfClients	0	item
CY2012	ttek	Concentration Risk Number Of Clients ConcentrationRiskNumberOfClients	0	item
CY2012	ttek	Concentration Of Risk Accounts Receivable Percentage Minimum ConcentrationOfRiskAccountsReceivablePercentageMinimum	0.10	pure
	ttek	Concentration Of Risk Accounts Receivable Percentage Minimum ConcentrationOfRiskAccountsReceivablePercentageMinimum	0.10	pure
CY2013Q2	us-gaap	Business Combination Contingent Consideration Arrangements Range Of Outcomes Value High BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh	115500000	USD
CY2013Q2	us-gaap	Business Acquisition Contingent Consideration Potential Cash Payment BusinessAcquisitionContingentConsiderationPotentialCashPayment	91000000	USD
CY2013Q2	ttek	Business Acquisition Contingent Consideration Potential Cash Payment Current BusinessAcquisitionContingentConsiderationPotentialCashPaymentCurrent	24178000	USD
CY2012Q3	ttek	Business Acquisition Contingent Consideration Potential Cash Payment Current BusinessAcquisitionContingentConsiderationPotentialCashPaymentCurrent	35407000	USD
CY2013Q2	ttek	Business Acquisition Contingent Consideration Potential Cash Payment Noncurrent BusinessAcquisitionContingentConsiderationPotentialCashPaymentNoncurrent	68140000	USD
CY2012Q3	ttek	Business Acquisition Contingent Consideration Potential Cash Payment Noncurrent BusinessAcquisitionContingentConsiderationPotentialCashPaymentNoncurrent	16132000	USD
	ttek	Business Acquisition Contingent Consideration Actual Cash Payment BusinessAcquisitionContingentConsiderationActualCashPayment	24400000	USD
	ttek	Business Acquisition Contingent Consideration Actual Cash Payment BusinessAcquisitionContingentConsiderationActualCashPayment	30400000	USD
	ttek	Business Acquisition Contingent Consideration Actual Cash Payment Reported As Cash Flows From Financing Activities BusinessAcquisitionContingentConsiderationActualCashPaymentReportedAsCashFlowsFromFinancingActivities	18100000	USD
	ttek	Business Acquisition Contingent Consideration Actual Cash Payment Reported As Cash Flows From Financing Activities BusinessAcquisitionContingentConsiderationActualCashPaymentReportedAsCashFlowsFromFinancingActivities	24000000	USD
	ttek	Business Acquisition Contingent Consideration Actual Cash Payment Reported As Cash Flows From Investing Activities BusinessAcquisitionContingentConsiderationActualCashPaymentReportedAsCashFlowsFromInvestingActivities	11700000	USD
CY2013Q2	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	9600000	USD
CY2012Q3	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	6900000	USD
	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	22100000	USD
CY2013Q2	us-gaap	Finite Lived Intangible Assets Amortization Expense Remainder Of Fiscal Year FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear	8742000	USD
CY2013Q2	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	94754000	USD
CY2012Q3	us-gaap	Goodwill Goodwill	635958000	USD
CY2013Q2	us-gaap	Goodwill Goodwill	710321000	USD
	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	155610000	USD
CY2012Q3	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	167528000	USD
CY2013Q2	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	208322000	USD
CY2012Q3	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	93297000	USD
CY2013Q2	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	113568000	USD
	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	24200000	USD
CY2013Q2	ttek	Future Amortization Expense First Full Fiscal Year FutureAmortizationExpenseFirstFullFiscalYear	26238000	USD
CY2013Q2	ttek	Future Amortization Expense Second Full Fiscal Year FutureAmortizationExpenseSecondFullFiscalYear	19069000	USD
CY2013Q2	ttek	Future Amortization Expense Third Full Fiscal Year FutureAmortizationExpenseThirdFullFiscalYear	15921000	USD
CY2013Q2	ttek	Future Amortization Expense Fourth Full Fiscal Year FutureAmortizationExpenseFourthFullFiscalYear	13488000	USD
CY2013Q2	ttek	Future Amortization Expense After Fourth Full Fiscal Year FutureAmortizationExpenseAfterFourthFullFiscalYear	11296000	USD
CY2012Q3	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	209427000	USD
CY2013Q2	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	236121000	USD
CY2012Q3	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	135118000	USD
CY2013Q2	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	148745000	USD
CY2012Q3	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	74309000	USD
CY2013Q2	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	87376000	USD
CY2013Q2	us-gaap	Depreciation Depreciation	8090000	USD
	us-gaap	Depreciation Depreciation	22420000	USD
CY2012Q3	us-gaap	Depreciation Depreciation	6077000	USD
	us-gaap	Depreciation Depreciation	19657000	USD
CY2013Q2	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	2800000	USD
	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	7600000	USD
CY2012Q3	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	2500000	USD
	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	8200000	USD
	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod	279075	shares
CY2013Q2	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod	0	shares
	ttek	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price During The Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePriceDuringThePeriod	24.26
	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	8.74
CY2013Q2	us-gaap	Assets Assets	1771512000	USD
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.16
CY2013Q2	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-78385000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-27342000	USD
CY2010Q1	ttek	Notional Amount Of Each New Foreign Currency Cash Flow Hedge Derivative NotionalAmountOfEachNewForeignCurrencyCashFlowHedgeDerivative	4200000	CAD
CY2010Q1	ttek	Notional Amount Of Each New Foreign Currency Cash Flow Hedge Derivative NotionalAmountOfEachNewForeignCurrencyCashFlowHedgeDerivative	3900000	USD
CY2013Q2	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	64832000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	64554000	shares
CY2013Q2	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	64832000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	64554000	shares
CY2013Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-1.21
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.42
CY2013Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-1.21
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.42
CY2012Q3	us-gaap	Sales Revenue Services Net SalesRevenueServicesNet	684698000	USD
CY2012Q3	ttek	Subcontractor Costs SubcontractorCosts	167832000	USD
CY2012Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	63387000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	63054000	shares
CY2012Q3	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	792000	shares
	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	698000	shares
CY2012Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	64179000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	63752000	shares
CY2012Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.46
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.17
CY2012Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.45
	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	-0.043	pure
	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.348	pure
CY2013Q2	ttek	Provision For Income Taxes Undistributed Earnings Of Foreign Subsidiaries ProvisionForIncomeTaxesUndistributedEarningsOfForeignSubsidiaries	0	USD
CY2013Q1	us-gaap	Income Tax Reconciliation Prior Year Income Taxes IncomeTaxReconciliationPriorYearIncomeTaxes	-1100000	USD
CY2011Q3	ttek	Notional Amount Of Each New Foreign Currency Cash Flow Hedge Derivative NotionalAmountOfEachNewForeignCurrencyCashFlowHedgeDerivative	4200000	CAD
CY2011Q3	ttek	Notional Amount Of Each New Foreign Currency Cash Flow Hedge Derivative NotionalAmountOfEachNewForeignCurrencyCashFlowHedgeDerivative	4200000	USD
CY2013Q1	us-gaap	Derivative Cash Received On Hedge DerivativeCashReceivedOnHedge	3900000	USD
	us-gaap	Line Of Credit Facility Increase Decrease For Period Net LineOfCreditFacilityIncreaseDecreaseForPeriodNet	130800000	USD
	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	2495000	USD
CY2013Q2	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	600000	USD
CY2012Q3	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	800000	USD
	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	2369000	USD
CY2013Q2	us-gaap	Variable Interest Entity Nonconsolidated Carrying Amount Assets VariableInterestEntityNonconsolidatedCarryingAmountAssets	20100000	USD
CY2012Q3	us-gaap	Variable Interest Entity Nonconsolidated Carrying Amount Assets VariableInterestEntityNonconsolidatedCarryingAmountAssets	19000000	USD
CY2013Q2	us-gaap	Variable Interest Entity Nonconsolidated Carrying Amount Liabilities VariableInterestEntityNonconsolidatedCarryingAmountLiabilities	17400000	USD
CY2012Q3	us-gaap	Variable Interest Entity Nonconsolidated Carrying Amount Liabilities VariableInterestEntityNonconsolidatedCarryingAmountLiabilities	15700000	USD
CY2013Q2	us-gaap	Sales Revenue Services Net SalesRevenueServicesNet	614835000	USD
CY2012Q3	us-gaap	Other Cost Of Operating Revenue OtherCostOfOperatingRevenue	419140000	USD
	us-gaap	Sales Revenue Services Net SalesRevenueServicesNet	1915379000	USD
CY2012Q3	ttek	Selling General And Administrative Expenses Including Depreciation And Amortization Of Intangible Assets SellingGeneralAndAdministrativeExpensesIncludingDepreciationAndAmortizationOfIntangibleAssets	53210000	USD
CY2013Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	-99884000	USD
CY2012Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	46261000	USD
	us-gaap	Operating Income Loss OperatingIncomeLoss	-20409000	USD
CY2012Q3	us-gaap	Interest Expense InterestExpense	1419000	USD
CY2012Q3	us-gaap	Assets Assets	1671030000	USD
	ttek	Concentration Of Risk Revenue Percentage Minimum ConcentrationOfRiskRevenuePercentageMinimum	0.10	pure
CY2012Q3	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	104848000	USD
CY2012Q3	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	48168000	USD
CY2012Q3	us-gaap	Income Taxes Receivable IncomeTaxesReceivable	5817000	USD
CY2012Q3	us-gaap	Assets Current AssetsCurrent	859313000	USD
CY2012Q3	us-gaap	Equity Method Investments EquityMethodInvestments	3279000	USD
CY2012Q3	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	74231000	USD
CY2012Q3	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	23940000	USD
CY2012Q3	us-gaap	Accounts Payable Current AccountsPayableCurrent	154003000	USD
CY2012Q3	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	128086000	USD
CY2012Q3	us-gaap	Deferred Tax Liabilities Current DeferredTaxLiabilitiesCurrent	20809000	USD
CY2012Q3	us-gaap	Long Term Debt And Capital Lease Obligations Current LongTermDebtAndCapitalLeaseObligationsCurrent	2031000	USD
CY2012Q3	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	72549000	USD
CY2012Q3	us-gaap	Liabilities Current LiabilitiesCurrent	503794000	USD
CY2012Q3	us-gaap	Deferred Tax Liabilities Noncurrent DeferredTaxLiabilitiesNoncurrent	24268000	USD
CY2012Q3	us-gaap	Long Term Debt And Capital Lease Obligations LongTermDebtAndCapitalLeaseObligations	81047000	USD
CY2012Q3	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	25922000	USD
CY2013Q2	us-gaap	Liabilities Current LiabilitiesCurrent	462221000	USD
CY2012Q3	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2013Q2	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2012Q3	us-gaap	Common Stock Value CommonStockValue	638000	USD
CY2012Q3	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	433009000	USD
CY2012Q3	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	31017000	USD
CY2012Q3	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	554306000	USD
CY2012Q3	us-gaap	Stockholders Equity StockholdersEquity	1018970000	USD
CY2012Q3	us-gaap	Minority Interest MinorityInterest	897000	USD
CY2012Q3	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1019867000	USD
CY2013Q2	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	87177000	USD
CY2012Q3	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	1671030000	USD
CY2013Q2	us-gaap	Stockholders Equity StockholdersEquity	976071000	USD
CY2013Q2	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	976956000	USD
CY2013Q2	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	1771512000	USD
CY2013Q2	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	2000000	shares
CY2012Q3	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	2000000	shares
CY2013Q2	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.01
CY2012Q3	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.01
CY2013Q2	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2013Q2	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0	shares
CY2012Q3	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2012Q3	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0	shares
CY2013Q2	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	150000000	shares
CY2012Q3	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	150000000	shares
CY2013Q2	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2012Q3	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2013Q2	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	64799000	shares
CY2013Q2	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	64799000	shares
CY2012Q3	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	63837000	shares
CY2012Q3	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	63837000	shares
CY2012Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	44842000	USD
CY2012Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	15674000	USD
CY2012Q3	us-gaap	Profit Loss ProfitLoss	29168000	USD
CY2012Q3	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	-7199000	USD
CY2012Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	29054000	USD
	us-gaap	Sales Revenue Services Net SalesRevenueServicesNet	1991670000	USD
	ttek	Subcontractor Costs SubcontractorCosts	505855000	USD
	us-gaap	Other Cost Of Operating Revenue OtherCostOfOperatingRevenue	1215391000	USD
	ttek	Selling General And Administrative Expenses Including Depreciation And Amortization Of Intangible Assets SellingGeneralAndAdministrativeExpensesIncludingDepreciationAndAmortizationOfIntangibleAssets	154487000	USD
	us-gaap	Operating Income Loss OperatingIncomeLoss	117896000	USD
	us-gaap	Interest Expense InterestExpense	4182000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	113714000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	39522000	USD
	us-gaap	Profit Loss ProfitLoss	74192000	USD
	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	12986000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	73948000	USD
CY2013Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-101894000	USD
CY2013Q2	us-gaap	Profit Loss ProfitLoss	-78115000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-25739000	USD
CY2012Q3	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	170000	USD
	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	-44000	USD
CY2012Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-7029000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	12942000	USD
CY2012Q3	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	22139000	USD
	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	87134000	USD
	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	47148000	USD
	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	5569000	USD
CY2012Q3	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	114000	USD
	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	244000	USD
CY2012Q3	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Noncontrolling Interest OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToNoncontrollingInterest	-11000	USD
	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Noncontrolling Interest OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToNoncontrollingInterest	3000	USD
CY2012Q3	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	103000	USD
	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	247000	USD
CY2012Q3	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	22036000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	86887000	USD
CY2013Q2	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-22430000	USD
CY2013Q2	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	-100545000	USD
CY2013Q2	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-100782000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-40104000	USD
	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	-66951000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-67380000	USD
	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	42203000	USD
	us-gaap	Foreign Currency Transaction Gain Loss Realized ForeignCurrencyTransactionGainLossRealized	-286000	USD
	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	2812000	USD
	us-gaap	Share Based Compensation ShareBasedCompensation	8193000	USD
	us-gaap	Excess Tax Benefit From Share Based Compensation Operating Activities ExcessTaxBenefitFromShareBasedCompensationOperatingActivities	283000	USD
	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-3896000	USD
	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	2115000	USD
	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	157000	USD
	ttek	Fair Value Adjustments To Contingent Consideration FairValueAdjustmentsToContingentConsideration	8662000	USD
	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	34037000	USD
	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	-27561000	USD
	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-2584000	USD
	ttek	Increase Decrease In Accrued Compensation IncreaseDecreaseInAccruedCompensation	9974000	USD
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	4147000	USD
	us-gaap	Increase Decrease In Billing In Excess Of Cost Of Earnings IncreaseDecreaseInBillingInExcessOfCostOfEarnings	6032000	USD
	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	3333000	USD
	us-gaap	Increase Decrease In Income Taxes Payable Net Of Income Taxes Receivable IncreaseDecreaseInIncomeTaxesPayableNetOfIncomeTaxesReceivable	-3215000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities Continuing Operations NetCashProvidedByUsedInOperatingActivitiesContinuingOperations	128201000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities Continuing Operations NetCashProvidedByUsedInOperatingActivitiesContinuingOperations	115268000	USD
	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	14906000	USD
	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	52226000	USD
	us-gaap	Payments For Hedge Investing Activities PaymentsForHedgeInvestingActivities	4192000	USD
	us-gaap	Proceeds From Hedge Investing Activities ProceedsFromHedgeInvestingActivities	3906000	USD
	us-gaap	Payments To Acquire Interest In Joint Venture PaymentsToAcquireInterestInJointVenture	586000	USD
	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	701000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities Continuing Operations NetCashProvidedByUsedInInvestingActivitiesContinuingOperations	-67303000	USD
	us-gaap	Increase Decrease In Restricted Cash IncreaseDecreaseInRestrictedCash	-470000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities Continuing Operations NetCashProvidedByUsedInInvestingActivitiesContinuingOperations	-187230000	USD
	us-gaap	Repayments Of Long Term Debt And Capital Securities RepaymentsOfLongTermDebtAndCapitalSecurities	60222000	USD
	us-gaap	Proceeds From Issuance Of Long Term Debt And Capital Securities Net ProceedsFromIssuanceOfLongTermDebtAndCapitalSecuritiesNet	52849000	USD
	ttek	Payments Of Earn Out Liabilities PaymentsOfEarnOutLiabilities	18055000	USD
	us-gaap	Excess Tax Benefit From Share Based Compensation Financing Activities ExcessTaxBenefitFromShareBasedCompensationFinancingActivities	283000	USD
	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	15697000	USD
	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	12885000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities Continuing Operations NetCashProvidedByUsedInFinancingActivitiesContinuingOperations	-12260000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities Continuing Operations NetCashProvidedByUsedInFinancingActivitiesContinuingOperations	115676000	USD
	us-gaap	Effect Of Exchange Rate On Cash And Cash Equivalents Continuing Operations EffectOfExchangeRateOnCashAndCashEquivalentsContinuingOperations	1533000	USD
	us-gaap	Net Cash Provided By Used In Continuing Operations NetCashProvidedByUsedInContinuingOperations	50171000	USD
	us-gaap	Net Cash Provided By Used In Continuing Operations NetCashProvidedByUsedInContinuingOperations	41487000	USD
CY2011Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	90494000	USD
CY2012Q3	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	140665000	USD
	us-gaap	Interest Paid Net InterestPaidNet	4143000	USD
	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	45670000	USD
CY2013Q2	us-gaap	Minority Interest MinorityInterest	885000	USD
	dei	Entity Registrant Name EntityRegistrantName	TETRA TECH INC
	dei	Entity Central Index Key EntityCentralIndexKey	0000831641
	dei	Document Type DocumentType	10-Q
	dei	Document Period End Date DocumentPeriodEndDate	2013-06-30
	dei	Amendment Flag AmendmentFlag	false
	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--09-29
	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2013Q3	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	64496480	shares
	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2013
	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	Q3
CY2013Q2	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	29061000	USD
CY2013Q2	us-gaap	Common Stock Value CommonStockValue	648000	USD
CY2013Q2	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	457480000	USD
CY2013Q2	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-9021000	USD
CY2013Q2	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	526964000	USD
CY2013Q2	us-gaap	Stock Repurchase Program Authorized Amount StockRepurchaseProgramAuthorizedAmount	100000000	USD
CY2013Q2	us-gaap	Treasury Stock Shares Acquired TreasuryStockSharesAcquired	175700	shares
CY2013Q2	us-gaap	Treasury Stock Acquired Average Cost Per Share TreasuryStockAcquiredAverageCostPerShare	23.60
CY2013Q2	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	4100000	USD
CY2013Q2	us-gaap	Assets Current AssetsCurrent	850623000	USD
CY2012Q3	us-gaap	Preferred Stock Value PreferredStockValue		USD
CY2013Q2	us-gaap	Preferred Stock Value PreferredStockValue		USD
	us-gaap	Profit Loss ProfitLoss	-26847000	USD
CY2013Q2	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	237000	USD
	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	429000	USD
CY2013Q2	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	146335000	USD
CY2013Q2	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	46433000	USD
CY2013Q2	us-gaap	Income Taxes Receivable IncomeTaxesReceivable	25635000	USD
CY2013Q2	us-gaap	Equity Method Investments EquityMethodInvestments	2733000	USD
CY2013Q2	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	94754000	USD
CY2013Q2	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	25705000	USD
CY2013Q2	us-gaap	Accounts Payable Current AccountsPayableCurrent	133092000	USD
CY2013Q2	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	118737000	USD
CY2013Q2	us-gaap	Deferred Tax Liabilities Current DeferredTaxLiabilitiesCurrent	9642000	USD
CY2013Q2	us-gaap	Long Term Debt And Capital Lease Obligations Current LongTermDebtAndCapitalLeaseObligationsCurrent	4043000	USD
CY2013Q2	us-gaap	Deferred Tax Liabilities Noncurrent DeferredTaxLiabilitiesNoncurrent	26738000	USD
CY2013Q2	us-gaap	Long Term Debt And Capital Lease Obligations LongTermDebtAndCapitalLeaseObligations	208396000	USD
CY2013Q2	ttek	Subcontractor Costs SubcontractorCosts	139693000	USD
	ttek	Subcontractor Costs SubcontractorCosts	422092000	USD
CY2013Q2	us-gaap	Other Cost Of Operating Revenue OtherCostOfOperatingRevenue	469398000	USD
	us-gaap	Other Cost Of Operating Revenue OtherCostOfOperatingRevenue	1314219000	USD
CY2013Q2	ttek	Selling General And Administrative Expenses Including Depreciation And Amortization Of Intangible Assets SellingGeneralAndAdministrativeExpensesIncludingDepreciationAndAmortizationOfIntangibleAssets	56744000	USD
	ttek	Selling General And Administrative Expenses Including Depreciation And Amortization Of Intangible Assets SellingGeneralAndAdministrativeExpensesIncludingDepreciationAndAmortizationOfIntangibleAssets	151539000	USD
CY2013Q2	us-gaap	Interest Expense InterestExpense	2010000	USD
	us-gaap	Interest Expense InterestExpense	5330000	USD
CY2013Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-23779000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	1108000	USD
CY2013Q2	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	270000	USD
	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	495000	USD
CY2013Q2	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	-22430000	USD
	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	-40197000	USD
	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	93000	USD
	us-gaap	Payments For Hedge Investing Activities PaymentsForHedgeInvestingActivities	4177000	USD
	us-gaap	Proceeds From Hedge Investing Activities ProceedsFromHedgeInvestingActivities	3907000	USD
	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	1763000	USD
	us-gaap	Repayments Of Long Term Debt And Capital Securities RepaymentsOfLongTermDebtAndCapitalSecurities	167185000	USD
	us-gaap	Proceeds From Issuance Of Long Term Debt And Capital Securities Net ProceedsFromIssuanceOfLongTermDebtAndCapitalSecuritiesNet	296389000	USD
	ttek	Payments Of Earn Out Liabilities PaymentsOfEarnOutLiabilities	24015000	USD
	us-gaap	Foreign Currency Transaction Gain Loss Realized ForeignCurrencyTransactionGainLossRealized	-270000	USD
	us-gaap	Excess Tax Benefit From Share Based Compensation Financing Activities ExcessTaxBenefitFromShareBasedCompensationFinancingActivities	875000	USD
	us-gaap	Effect Of Exchange Rate On Cash And Cash Equivalents Continuing Operations EffectOfExchangeRateOnCashAndCashEquivalentsContinuingOperations	-2227000	USD
	us-gaap	Interest Paid Net InterestPaidNet	3801000	USD
	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	34913000	USD
CY2013Q2	ttek	Fair Value Adjustments To Contingent Consideration FairValueAdjustmentsToContingentConsideration	7716000	USD
CY2012Q3	ttek	Fair Value Adjustments To Contingent Consideration FairValueAdjustmentsToContingentConsideration	1745000	USD
	ttek	Lease Termination Costs And Related Asset Impairment Charges LeaseTerminationCostsAndRelatedAssetImpairmentCharges	6463000	USD
	us-gaap	Goodwill Translation Adjustments GoodwillTranslationAdjustments	-27055000	USD
	us-gaap	Goodwill Allocation Adjustment GoodwillAllocationAdjustment	2408000	USD
CY2013Q2	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Noncontrolling Interest OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToNoncontrollingInterest	-33000	USD
	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Noncontrolling Interest OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToNoncontrollingInterest	-66000	USD
	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	2868000	USD
	us-gaap	Share Based Compensation ShareBasedCompensation	7628000	USD
	us-gaap	Excess Tax Benefit From Share Based Compensation Operating Activities ExcessTaxBenefitFromShareBasedCompensationOperatingActivities	875000	USD
	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-27005000	USD
	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	12125000	USD
	ttek	Fair Value Adjustments To Contingent Consideration FairValueAdjustmentsToContingentConsideration	1959000	USD
	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	142000	USD
	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-117687000	USD
	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	-7435000	USD
	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-43911000	USD
	ttek	Increase Decrease In Accrued Compensation IncreaseDecreaseInAccruedCompensation	-12458000	USD
	us-gaap	Increase Decrease In Billing In Excess Of Cost Of Earnings IncreaseDecreaseInBillingInExcessOfCostOfEarnings	-10986000	USD
	us-gaap	Increase Decrease In Income Taxes Payable Net Of Income Taxes Receivable IncreaseDecreaseInIncomeTaxesPayableNetOfIncomeTaxesReceivable	-15144000	USD
	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	20533000	USD
	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	168660000	USD
CY2013Q2	ttek	Government Contract Receivable Unbilled Amounts Related To Claims And Requests For Equitable Adjustment On Contract GovernmentContractReceivableUnbilledAmountsRelatedToClaimsAndRequestsForEquitableAdjustmentOnContract	37000000	USD
CY2013Q2	us-gaap	Undistributed Earnings Of Foreign Subsidiaries UndistributedEarningsOfForeignSubsidiaries	22000000	USD
CY2013Q2	ttek	Number Of Reporting Units For Which Goodwill Impairment Test Is Triggered NumberOfReportingUnitsForWhichGoodwillImpairmentTestIsTriggered	3	item
CY2013Q2	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	56600000	USD
	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	56600000	USD
	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	-9009000	USD
	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	39800000	USD
	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	210000	USD
	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	3848000	USD
	us-gaap	Income Tax Reconciliation Tax Credits Research IncomeTaxReconciliationTaxCreditsResearch	2243000	USD
	us-gaap	Income Tax Reconciliation Tax Credits Research IncomeTaxReconciliationTaxCreditsResearch	253000	USD
	us-gaap	Income Tax Reconciliation Deductions Qualified Production Activities IncomeTaxReconciliationDeductionsQualifiedProductionActivities	889000	USD
	us-gaap	Income Tax Reconciliation Deductions Qualified Production Activities IncomeTaxReconciliationDeductionsQualifiedProductionActivities	543000	USD
	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits Research EffectiveIncomeTaxRateReconciliationTaxCreditsResearch	0.002	pure
	us-gaap	Effective Income Tax Rate Reconciliation Deductions Qualified Production Activities EffectiveIncomeTaxRateReconciliationDeductionsQualifiedProductionActivities	-0.035	pure
	ttek	Effective Income Tax Rate Reconciliation Goodwill EffectiveIncomeTaxRateReconciliationGoodwill	-0.472	pure
	us-gaap	Effective Income Tax Rate Reconciliation Deductions Qualified Production Activities EffectiveIncomeTaxRateReconciliationDeductionsQualifiedProductionActivities	0.005	pure
	us-gaap	Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	0.070	pure
	us-gaap	Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	-0.028	pure
	us-gaap	Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	-0.149	pure
	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	-0.001	pure
	ttek	Income Tax Reconciliation Goodwill IncomeTaxReconciliationGoodwill	12139000	USD
	ttek	Payments Of Debt Issuance Costs1 PaymentsOfDebtIssuanceCosts1	1938000	USD
CY2013Q2	ttek	Contract Termination Liability ContractTerminationLiability	6005000	USD
CY2012Q3	ttek	Contract Termination Liability ContractTerminationLiability	2940000	USD
	ttek	Contract Termination Costs ContractTerminationCosts	4074000	USD
	ttek	Contract Termination Accrual Adjustment ContractTerminationAccrualAdjustment	-1009000	USD
	us-gaap	Income Tax Reconciliation Foreign Income Tax Rate Differential IncomeTaxReconciliationForeignIncomeTaxRateDifferential	-1790000	USD
	us-gaap	Income Tax Reconciliation Foreign Income Tax Rate Differential IncomeTaxReconciliationForeignIncomeTaxRateDifferential	-3240000	USD
	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	3832000	USD
	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	-90000	USD
	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.350	pure
	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.350	pure
	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	-0.008	pure
	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.034	pure
	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits Research EffectiveIncomeTaxRateReconciliationTaxCreditsResearch	-0.087	pure
CY2013Q2	ttek	Loss On Government Contract Receivable Unbilled Amounts Related To Claims And Requests For Equitable Adjustment LossOnGovernmentContractReceivableUnbilledAmountsRelatedToClaimsAndRequestsForEquitableAdjustment	17000000	USD
CY2013Q2	ttek	Business Acquisition Contingent Consideration Fair Value Adjustments Gain Loss BusinessAcquisitionContingentConsiderationFairValueAdjustmentsGainLoss	7700000	USD
	ttek	Business Acquisition Contingent Consideration Fair Value Adjustments Gain Loss BusinessAcquisitionContingentConsiderationFairValueAdjustmentsGainLoss	8700000	USD
CY2012Q3	ttek	Business Acquisition Contingent Consideration Fair Value Adjustments Gain Loss BusinessAcquisitionContingentConsiderationFairValueAdjustmentsGainLoss	1700000	USD
	ttek	Business Acquisition Contingent Consideration Fair Value Adjustments Gain Loss BusinessAcquisitionContingentConsiderationFairValueAdjustmentsGainLoss	2000000	USD
	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	-1142000	USD
	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0.044	pure
	ttek	Loss On Government Contract Receivable Unbilled Amounts Related To Claims And Requests For Equitable Adjustment LossOnGovernmentContractReceivableUnbilledAmountsRelatedToClaimsAndRequestsForEquitableAdjustment	17000000	USD
CY2012	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	USD
CY2012	ttek	Loss On Government Contract Receivable Unbilled Amounts Related To Claims And Requests For Equitable Adjustment LossOnGovernmentContractReceivableUnbilledAmountsRelatedToClaimsAndRequestsForEquitableAdjustment	0	USD
CY2013Q2	ttek	Effective Income Tax Rate Continuing Operations Excluding Impact Of Goodwill Impairment EffectiveIncomeTaxRateContinuingOperationsExcludingImpactOfGoodwillImpairment	0.337	pure
	ttek	Effective Income Tax Rate Continuing Operations Excluding Impact Of Goodwill Impairment EffectiveIncomeTaxRateContinuingOperationsExcludingImpactOfGoodwillImpairment	0.312	pure
CY2013Q2	us-gaap	Income Tax Reconciliation Nondeductible Expense Impairment Losses IncomeTaxReconciliationNondeductibleExpenseImpairmentLosses	35000000	USD

Files In Submission

Name	View Source	Status
0001104659-13-062313-index-headers.html	Edgar Link	pending
0001104659-13-062313-index.html	Edgar Link	pending
0001104659-13-062313.txt	Edgar Link	pending
0001104659-13-062313-xbrl.zip	Edgar Link	pending
a13-13995_110q.htm	Edgar Link	pending
a13-13995_1ex31d1.htm	Edgar Link	pending
a13-13995_1ex31d2.htm	Edgar Link	pending
a13-13995_1ex32d1.htm	Edgar Link	pending
a13-13995_1ex32d2.htm	Edgar Link	pending
a13-13995_1ex95.htm	Edgar Link	pending
FilingSummary.xml	Edgar Link	unprocessable
Financial_Report.xls	Edgar Link	pending
R1.htm	Edgar Link	pending
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report.css	Edgar Link	pending
Show.js	Edgar Link	pending
ttek-20130630.xml	Edgar Link	completed
ttek-20130630.xsd	Edgar Link	pending
ttek-20130630_cal.xml	Edgar Link	unprocessable
ttek-20130630_def.xml	Edgar Link	unprocessable
ttek-20130630_lab.xml	Edgar Link	unprocessable
ttek-20130630_pre.xml	Edgar Link	unprocessable

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$TTEK
TETRA TECH INC Stock $ttek

2013 Q2 Form 10-Q Financial Statement

#000110465913062313 Filed on August 09, 2013

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$TTEK TETRA TECH INC Stock $ttek

2013 Q2 Form 10-Q Financial Statement

#000110465913062313 Filed on August 09, 2013

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$TTEK
TETRA TECH INC Stock $ttek