Tetra Tech (TTEK) 10-Q 30 Apr 21 2021 Q2 Quarterly report Financial data

Cover

Cover - shares	6 Months Ended
	Mar. 28, 2021	Apr. 19, 2021
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Mar. 28, 2021
Document Transition Report	false
Entity File Number	0-19655
Entity Registrant Name	TETRA TECH, INC.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	95-4148514
Entity Address, Address Line One	3475 East Foothill Boulevard
Entity Address, City or Town	Pasadena
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	91107
City Area Code	626
Local Phone Number	351-4664
Title of 12(b) Security	Common Stock, $0.01 par value
Trading Symbol	TTEK
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		54,160,353
Entity Central Index Key	0000831641
Amendment Flag	false
Current Fiscal Year End Date	--10-03
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q2

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 28, 2021	Sep. 27, 2020
Current assets:
Cash and cash equivalents	$ 225,330	$ 157,515
Accounts receivable, net	629,186	649,035
Contract assets	95,079	92,632
Prepaid expenses and other current assets	87,400	81,094
Income taxes receivable	27,116	19,509
Total current assets	1,064,111	999,785
Property and equipment, net	37,423	35,507
Right-of-use assets, operating leases	222,922	239,396
Investments in unconsolidated joint ventures	7,700	7,332
Goodwill	1,029,573	993,498
Intangible assets, net	8,923	13,943
Deferred tax assets	34,740	32,052
Other long-term assets	49,670	57,045
Total assets	2,455,062	2,378,558
Current liabilities:
Accounts payable	124,260	111,804
Accrued compensation	179,025	199,801
Contract liabilities	185,602	171,905
Short-term lease liabilities, operating leases	68,941	69,650
Current portion of long-term debt and other short-term borrowings	28,885	49,264
Current contingent earn-out liabilities	17,492	16,142
Other current liabilities	192,497	174,890
Total current liabilities	796,702	793,456
Deferred tax liabilities	18,152	16,316
Long-term debt	238,339	242,395
Long-term lease liabilities, operating leases	179,645	191,955
Long-term contingent earn-out liabilities	11,166	16,475
Other long-term liabilities	63,830	80,588
Commitments and contingencies (Note 16)
Equity:
Preferred stock - authorized, 2,000 shares of $0.01 par value; no shares issued and outstanding at March 28, 2021 and September 27, 2020	0	0
Common stock - authorized, 150,000 shares of $0.01 par value; issued and outstanding, 54,158 and 53,797 shares at March 28, 2021 and September 27, 2020, respectively	542	538
Accumulated other comprehensive loss	(115,056)	(161,786)
Retained earnings	1,261,661	1,198,567
Tetra Tech stockholders’ equity	1,147,147	1,037,319
Noncontrolling interests	81	54
Total stockholders' equity	1,147,228	1,037,373
Total liabilities and stockholders' equity	$ 2,455,062	$ 2,378,558

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - $ / shares	Mar. 28, 2021	Sep. 27, 2020
Statement of Financial Position [Abstract]
Preferred stock, authorized shares (in shares)	2,000,000	2,000,000
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Common stock, authorized shares (in shares)	150,000,000	150,000,000
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares issued (in shares)	54,158,000	53,797,000
Common stock, shares outstanding (in shares)	54,158,000	53,797,000

Consolidated Statements of Inco

Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 28, 2021	Mar. 29, 2020	Mar. 28, 2021	Mar. 29, 2020
Revenue	$ 754,764	$ 734,133	$ 1,519,868	$ 1,531,756
Gross profit	112,484	97,000	228,794	206,737
Selling, general and administrative expenses	(51,907)	(51,041)	(101,928)	(97,476)
Contingent consideration – fair value adjustments	230	1,571	193	1,571
Income from operations	60,807	47,530	127,059	110,832
Interest expense	(2,823)	(3,501)	(5,849)	(6,849)
Income before income tax expense	57,984	44,029	121,210	103,983
Income tax expense	(12,456)	(7,616)	(23,234)	(20,253)
Net income	45,528	36,413	97,976	83,730
Net income attributable to noncontrolling interests	(11)	(16)	(23)	(23)
Net income attributable to Tetra Tech	$ 45,517	$ 36,397	$ 97,953	$ 83,707
Earnings per share attributable to Tetra Tech:
Basic (in dollars per share)	$ 0.84	$ 0.67	$ 1.81	$ 1.53
Diluted (in dollars per share)	$ 0.83	$ 0.66	$ 1.79	$ 1.51
Weighted-average common shares outstanding:
Basic (in shares)	54,187	54,699	54,085	54,541
Diluted (in shares)	54,736	55,463	54,715	55,380
Subcontractor costs
Cost of revenue	$ (154,939)	$ (149,673)	$ (314,873)	$ (333,274)
Other costs of revenue
Cost of revenue	$ (487,341)	$ (487,460)	$ (976,201)	$ (991,745)

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 28, 2021	Mar. 29, 2020	Mar. 28, 2021	Mar. 29, 2020
Statement of Comprehensive Income [Abstract]
Net income	$ 45,528	$ 36,413	$ 97,976	$ 83,730
Other comprehensive income, net of tax
Foreign currency translation adjustment, net of tax	10,975	(47,015)	43,368	(33,114)
Gain (loss) on cash flow hedge valuations, net of tax	1,890	(7,365)	3,366	(5,695)
Other comprehensive income (loss), net of tax	12,865	(54,380)	46,734	(38,809)
Comprehensive income (loss), net of tax	58,393	(17,967)	144,710	44,921
Comprehensive income attributable to noncontrolling interests, net of tax	13	12	27	21
Comprehensive income (loss) attributable to Tetra Tech, net of tax	$ 58,380	$ (17,979)	$ 144,683	$ 44,900

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Mar. 28, 2021	Mar. 29, 2020
Cash flows from operating activities:
Net income	$ 97,976	$ 83,730
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	11,524	12,809
Equity in income of unconsolidated joint ventures	(1,872)	(3,333)
Distributions of earnings from unconsolidated joint ventures	1,622	2,467
Amortization of stock-based awards	10,566	9,437
Deferred income taxes	350	3,153
Provision for losses from uncollectible receivables	(1,538)	539
Fair value adjustments to contingent consideration	(193)	(1,571)
Gain on sale of property and equipment	(66)	(3,523)
Changes in operating assets and liabilities, net of effects of business acquisitions:
Accounts receivable and contract assets	35,415	104,388
Prepaid expenses and other assets	18,091	5,317
Accounts payable	12,063	(89,630)
Accrued compensation	(20,524)	(44,690)
Contract liabilities	9,957	24,130
Other liabilities	(5,528)	(14,129)
Income taxes receivable/payable	(10,419)	(5,895)
Net cash provided by operating activities	157,424	83,199
Cash flows from investing activities:
Payments for business acquisitions, net of cash acquired	(3,065)	(27,739)
Capital expenditures	(4,297)	(5,876)
Proceeds from sale of property and equipment	79	6,316
Net cash used in investing activities	(7,283)	(27,299)
Cash flows from financing activities:
Proceeds from borrowings	141,628	243,364
Repayments on long-term debt	(146,250)	(174,730)
Repurchases of common stock	(30,000)	(81,660)
Taxes paid on vested restricted stock	(17,488)	(10,857)
Stock options exercised	9,771	7,927
Bank overdrafts	(21,121)	2,737
Dividends paid	(18,410)	(16,414)
Payments of contingent earn-out liabilities	(8,037)	(9,624)
Principal payments on finance leases	(1,222)	0
Net cash used in financing activities	(91,129)	(39,257)
Effect of exchange rate changes on cash, cash equivalents and restricted cash	8,803	(2,409)
Net increase in cash, cash equivalents and restricted cash	67,815	14,234
Cash, cash equivalents and restricted cash at beginning of period	157,515	120,901
Cash, cash equivalents and restricted cash at end of period	225,330	135,135
Cash paid during the period for:
Interest	5,412	6,510
Income taxes, net of refunds received of $1.1 million and $0.5 million	30,832	23,437
Reconciliation of cash, cash equivalents and restricted cash:
Total cash, cash equivalents and restricted cash	$ 225,330	$ 135,135

Consolidated Statements of Ca_2

Consolidated Statements of Cash Flows (Parenthetical) - USD ($) $ in Millions	6 Months Ended
	Mar. 28, 2021	Mar. 29, 2020
Statement of Cash Flows [Abstract]
Income tax refunds	$ 1.1	$ 0.5

Consolidated Statements of Stoc

Consolidated Statements of Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Loss	Retained Earnings	Total Tetra Tech Equity	Non-Controlling Interests
Beginning balance (in shares) at Sep. 29, 2019		54,565
Beginning balance at Sep. 29, 2019	$ 989,464	$ 546	$ 78,132	$ (160,584)	$ 1,071,192	$ 989,286	$ 178
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	83,730				83,707	83,707	23
Other comprehensive income (loss)	(38,809)			(38,807)		(38,807)	(2)
Distributions paid to noncontrolling interests	(69)						(69)
Cash dividends per common share	(16,414)				(16,414)	(16,414)
Stock-based compensation	9,437		9,437			9,437
Restricted & performance shares released (in shares)		215
Restricted & performance shares released	(11,098)	$ 2	(11,100)			(11,098)
Stock options exercised (in shares)		269
Stock options exercised	7,927	$ 3	7,924			7,927
Shares issued for Employee Stock Purchase Plan (in shares)		168
Shares issued for Employee Stock Purchase Plan	8,715	$ 1	8,714			8,715
Stock repurchases (in shares)		(1,075)
Stock repurchases	(82,645)	$ (11)	(82,634)			(82,645)
Ending balance (in shares) at Mar. 29, 2020		54,142
Ending balance at Mar. 29, 2020	950,238	$ 541	10,473	(199,391)	1,138,485	950,108	130
Beginning balance (in shares) at Dec. 29, 2019		54,728
Beginning balance at Dec. 29, 2019	1,026,765	$ 547	60,747	(145,015)	1,110,312	1,026,591	174
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	36,413				36,397	36,397	16
Other comprehensive income (loss)	(54,380)			(54,376)		(54,376)	(4)
Distributions paid to noncontrolling interests	(56)						(56)
Cash dividends per common share	(8,224)				(8,224)	(8,224)
Stock-based compensation	4,955		4,955			4,955
Restricted & performance shares released (in shares)		30
Restricted & performance shares released	(280)	$ 1	(281)			(280)
Stock options exercised (in shares)		215
Stock options exercised	6,513	$ 2	6,511			6,513
Stock repurchases (in shares)		(831)
Stock repurchases	(61,468)	$ (9)	(61,459)			(61,468)
Ending balance (in shares) at Mar. 29, 2020		54,142
Ending balance at Mar. 29, 2020	950,238	$ 541	10,473	(199,391)	1,138,485	950,108	130
Beginning balance (in shares) at Sep. 27, 2020		53,797
Beginning balance at Sep. 27, 2020	1,037,373	$ 538	0	(161,786)	1,198,567	1,037,319	54
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	97,976				97,953	97,953	23
Other comprehensive income (loss)	46,734			46,730		46,730	4
Cash dividends per common share	(18,410)				(18,410)	(18,410)
Stock-based compensation	10,566		10,566			10,566
Restricted & performance shares released (in shares)		211
Restricted & performance shares released	(17,488)	$ 2	(17,490)			(17,488)
Stock options exercised (in shares)		275
Stock options exercised	9,771	$ 3	9,768			9,771
Shares issued for Employee Stock Purchase Plan (in shares)		124
Shares issued for Employee Stock Purchase Plan	10,706	$ 1	10,705			10,706
Stock repurchases (in shares)		(249)
Stock repurchases	(30,000)	$ (2)	(13,549)		(16,449)	(30,000)
Ending balance (in shares) at Mar. 28, 2021		54,158
Ending balance at Mar. 28, 2021	1,147,228	$ 542	0	(115,056)	1,261,661	1,147,147	81
Beginning balance (in shares) at Dec. 27, 2020		54,193
Beginning balance at Dec. 27, 2020	1,105,254	$ 542	0	(127,919)	1,232,563	1,105,186	68
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	45,528				45,517	45,517	11
Other comprehensive income (loss)	12,865			12,863		12,863	2
Cash dividends per common share	(9,212)				(9,212)	(9,212)
Stock-based compensation	5,668		5,668			5,668
Restricted & performance shares released (in shares)		2
Restricted & performance shares released	(158)		(158)			(158)
Stock options exercised (in shares)		77
Stock options exercised	2,275	$ 1	2,274			2,275
Shares issued for Employee Stock Purchase Plan	8		8			8
Stock repurchases (in shares)		(114)
Stock repurchases	(15,000)	$ (1)	(7,792)		(7,207)	(15,000)
Ending balance (in shares) at Mar. 28, 2021		54,158
Ending balance at Mar. 28, 2021	$ 1,147,228	$ 542	$ 0	$ (115,056)	$ 1,261,661	$ 1,147,147	$ 81

Consolidated Statements of St_2

Consolidated Statements of Stockholders' Equity (Parenthetical) - $ / shares	Feb. 26, 2021	Dec. 11, 2020	Feb. 28, 2020	Dec. 13, 2019	Mar. 28, 2021	Mar. 29, 2020	Mar. 28, 2021	Mar. 29, 2020
Statement of Stockholders' Equity [Abstract]
Dividend paid per share (in dollars per share)	$ 0.17	$ 0.17	$ 0.15	$ 0.15	$ 0.17	$ 0.15	$ 0.34	$ 0.30

Basis of Presentation

Basis of Presentation	6 Months Ended
	Mar. 28, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	Basis of Presentation The accompanying unaudited consolidated financial statements and related notes of Tetra Tech, Inc. (“we,” “us,” “our” or "Tetra Tech") have been prepared in accordance with generally accepted accounting principles in the United States of America (“U.S. GAAP”) for interim financial information and with the instructions to Form 10-Q and Rule 10-01 of Regulation S-X. They do not include all of the information and footnotes required by U.S. GAAP for complete financial statements and, therefore, should be read in conjunction with the audited consolidated financial statements and the notes contained in our Annual Report on Form 10-K for the fiscal year ended September 27, 2020. These financial statements reflect all normal recurring adjustments that are considered necessary for a fair statement of our financial position, results of operations and cash flows for the interim periods presented. The results of operations and cash flows for any interim period are not necessarily indicative of results for the full year or for future years . Certain reclassifications were made to the prior year to conform to current year presentation.

Recent Accounting Pronouncement

Recent Accounting Pronouncements	6 Months Ended
	Mar. 28, 2021
Accounting Changes and Error Corrections [Abstract]
Recent Accounting Pronouncements	Recent Accounting Pronouncements In June 2016, the Financial Accounting Standards Board ("FASB") issued updated guidance, Accounting Standards Update ("ASU") 2016-13, related to the measurement of credit losses for certain financial assets. This guidance replaces the current incurred loss methodology with an expected credit loss methodology. It requires us to recognize an allowance equal to our current estimate of all contractual cash flows that we do not expect to collect. Our estimate would consider relevant information about past events, current conditions, and reasonable and supportable forecasts impacting the collectability of the reported amounts. We adopted this guidance in the first quarter of fiscal 2021, and the adoption did not have a material impact on our consolidated financial statements. In August 2018, the FASB issued updated guidance modifying certain fair value measurement disclosures. The guidance contains additional disclosures to enable users of the financial statements to better understand the entity’s assumptions used to develop significant unobservable inputs for Level 3 fair value measurements, but also eliminates the requirement for entities to disclose the amount of and reasons for transfers between Level 1 and Level 2 investments within the fair value hierarchy. We adopted this guidance in the first quarter of fiscal 2021, and the adoption did not have a material impact on our consolidated financial statements. In December 2019, the FASB issued guidance simplifying the accounting for income taxes by removing certain exceptions to general principles in Topic 740 and amending certain existing guidance for clarity. This guidance is effective for fiscal years and interim periods within those fiscal years, beginning after December 15, 2020 (first quarter of fiscal 2022 for us). Early adoption is permitted. We do not expect the adoption of this guidance to have a material impact on our consolidated financial statements. In May 2020, the Securities and Exchange Commission issued guidance amending certain financial disclosures about acquired and disposed businesses. The amendments are designed to assist registrants in making more meaningful determinations of whether a subsidiary or an acquired or disposed business is significant, and to improve the related disclosure requirements. The guidance is effective for fiscal years beginning after December 31, 2020 (first quarter of fiscal 2022 for us). We do not expect the adoption of this guidance to have a material impact on our consolidated financial statements.

Revenue and Contract Balances

Revenue and Contract Balances	6 Months Ended
	Mar. 28, 2021
Revenue from Contract with Customer [Abstract]
Revenue and Contract Balances	Revenue and Contract Balances Disaggregation of Revenue We disaggregate revenue by client sector and contract type, as we believe it best depicts how the nature, timing, and uncertainty of revenue and cash flows are affected by economic factors. The following tables present revenue disaggregated by client sector and contract type: Three Months Ended Six Months Ended March 28, March 29, March 28, March 29, (in thousands) Client Sector: U.S. state and local government $ 129,781 $ 103,671 $ 254,747 $ 227,507 U.S. federal government (1) 267,696 243,261 533,561 488,564 U.S. commercial 143,702 160,787 301,508 342,278 International (2) 213,585 226,414 430,052 473,407 Total $ 754,764 $ 734,133 $ 1,519,868 $ 1,531,756 Contract Type: Fixed-price $ 272,118 $ 255,613 $ 546,551 $ 526,668 Time-and-materials 347,197 350,618 702,438 738,776 Cost-plus 135,449 127,902 270,879 266,312 Total $ 754,764 $ 734,133 $ 1,519,868 $ 1,531,756 (1) Includes revenue generated under U.S. federal government contracts performed outside the United States. (2) Includes revenue generated from foreign operations, primarily in Canada, Australia, the United Kingdom, and revenue generated from non-U.S. clients. Other than the U.S. federal government, no single client accounted for more than 10% of our revenue for the three and six months ended March 28, 2021 and March 29, 2020. Contract Assets and Contract Liabilities We invoice customers based on the contractual terms of each contract. However, the timing of revenue recognition may differ from the timing of invoice issuance. Contract assets represent revenue recognized in excess of the amounts for which we have the contractual right to bill our customers. Such amounts are recoverable from customers based upon various measures of performance, including achievement of certain milestones or completion of a contract. In addition, many of our time and materials arrangements are billed in arrears pursuant to contract terms that are standard within the industry, resulting in contract assets and/or unbilled receivables being recorded, as revenue is recognized in advance of billings. Contract retentions, included in contract assets, represent amounts withheld by clients until certain conditions are met or the project is completed, which may extend beyond one year. Contract liabilities consist of billings in excess of revenue recognized. Contract liabilities decrease as we recognize revenue from the satisfaction of the related performance obligation and increase as billings in advance of revenue recognition occur. Contract assets and liabilities are reported in a net position on a contract-by-contract basis at the end of each reporting period. There were no substantial non-current contract assets or liabilities for the periods presented. Net contract assets/liabilities consisted of the following: Balance at March 28, September 27, 2020 (in thousands) Contract assets (1) $ 95,079 $ 92,632 Contract liabilities (185,602) (171,905) Net contract liabilities $ (90,523) $ (79,273) (1) Includes $7.4 million and $12.3 million of contract retentions as of March 28, 2021 and September 27, 2020, respectively. In the first half of fiscal 2021 and 2020, we recognized revenue of approximate ly $90 million and $105 million, respectively, from amounts included in the contract liability balances at the end of fiscal 2020 and 2019, respectively. We recognize revenue primarily using the cost-to-cost measure of progress to estimate progress towards completion. Changes in those estimates could result in the recognition of cumulative catch-up adjustments to the contract’s inception-to-date revenue, costs and profit in the period in which such changes are made. As a result, we recognized net favorable operating income adjustments of $1.1 million i n the first half of fiscal 2021 (all in the second quarter) compared to a net unfavorable adjustment of $2.8 million in the first half of fiscal 2020 (all in the second quarter). C hanges in revenue and cost estimates could also result in a projected loss, determined at the contract level, which would be recorded immediately in earnings. As of March 28, 2021 and September 27, 2020, our consolidated balance sheets included liabilities for anticipated losses of $9.5 million and $13.2 million , respectively. The estimated cost to complete these related contracts as of March 28, 2021 and September 27, 2020 was approxima tely $95 million and $118 million, respectively. Accounts Receivable, Net Net accounts receivable consisted of the following: Balance at March 28, September 27, (in thousands) Billed $ 380,522 $ 402,818 Unbilled 253,784 253,364 Total accounts receivable 634,306 656,182 Allowance for doubtful accounts (5,120) (7,147) Total accounts receivable, net $ 629,186 $ 649,035 Billed accounts receivable represent amounts billed to clients that have not been collected. Unbilled accounts receivable, which represent an unconditional right to payment subject only to the passage of time, include unbilled amounts typically resulting from revenue recognized but not yet billed pursuant to contract terms or billed after the period end date. Substantially all of our unbilled receivables at March 28, 2021 are expected to be billed and collecte d within 12 months. The allowance for doubtful accounts represents amounts that are expected to become uncollectible or unrealizable in the future. We determine an estimated allowance for uncollectible accounts based on management's consideration of trends in the actual and forecasted credit quality of our clients, including delinquency and payment history; type of client, such as a government agency or a commercial sector client; and general economic and industry conditions, including the potential impacts of the coronavirus disease 2019 ("COVID-19") pandemic, that may affect our clients' ability to pay. Total accounts receivable at March 28, 2021 and September 27, 2020 included approximately $11 million for each period (all in our Remediation Construction Management ("RCM") segment), related to claims, including requests for equitable adjustment, on contracts that provide for price redeterminat ion . Claims are amounts in excess of agreed contract prices that we seek to collect from our clients or other third parties for delays, errors in specifications and designs, contract terminations, change orders in dispute or unapproved as to both scope and price, or other causes of unanticipated additional costs. Factors considered in determining whether revenue associated with claims (including change orders in dispute and unapproved change orders in regards to both scope and price) should be recognized include the following: (a) the contract or other evidence provides a legal basis for the claim, (b) additional costs were caused by circumstances that were unforeseen at the contract date and not the result of deficiencies in our performance, (c) claim-related costs are identifiable and considered reasonable in view of the work performed, and (d) evidence supporting the claim is objective and verifiable. This can lead to a situation in which costs are recognized in one period and revenue is recognized in a subsequent period when a client agreement is obtained, or a claims resolution occurs. We regularly evaluate all unsettled claim amounts and record appropriate adjustme nts to revenue when it is probable that the claim will result in a different contract value than the amount previously estimated. In the first half of fiscal 2021 (al l in the second quarter), we recognized increases to revenue and related gains of $2.8 million in our Commercial/International Services Group ("CIG"). We recorded no material gains or losses related to claims in the first half of fiscal 2020. No single client accounted for more than 10% of our accounts receivable at March 28, 2021 and September 27, 2020. Remaining Unsatisfied Performance Obligations (“RUPOs”) Our RUPOs represent a measure of the total dollar value of work to be performed on contracts awarded and in progress. We had $3.1 billion of RU POs as of March 28, 2021. RUPOs increase with awards from new contracts or additions on existing contracts and decrease as work is performed and revenue is recognized on existing contracts. RUPOs may also decrease when projects are canceled or modified in scope. We include a contract within our RUPOs when the contract is awarded and an agreement on contract terms has been reached. We expect to satisfy our RUPOs as of March 28, 2021 over the following periods: Amount (in thousands) Within 12 months $ 1,828,946 Beyond 1,298,902 Total $ 3,127,848 Although RUPOs reflect business that is considered to be firm, cancellations, deferrals or scope adjustments may occur. RUPOs are adjusted to reflect any known project cancellations, revisions to project scope and cost, foreign currency exchange fluctuations and project deferrals, as appropriate. Our operations and maintenance contracts can generally be terminated by the clients without a substantive financial penalty. Therefore, the remaining performance obligations on such contracts are limited to the notice period required for the termination (usually 30, 60, or 90 days).

Acquisitions

Acquisitions	6 Months Ended
	Mar. 28, 2021
Business Combinations [Abstract]
Acquisitions	Acquisitions In the second quarter of fiscal 2021, we acquired a small company, Coanda Research and Development Corporation ("CRD"), based in Burnaby, British Columbia. CRD provides high-end expertise in computational fluid dynamics and utilizes industry-leading capabilities to solve complex engineering science problems for commercial customers, across a broad range of industries and is part of our CIG segment. In the second quarter of fiscal 2020, we acquired Segue Technologies, Inc. ("SEG"), a leading information technology management consulting firm based in Arlington, Virginia. SEG is part of our Government Services Group ("GSG") segment. The fair value of the purchase price w as $40.9 million. T his amount was comprised of $29.6 million in initial cash payments made to the sellers, and $11.3 million for the estimated fair value of contingent earn-out obligations, with a maximum of $20.0 million, based upon the achievement of specified operating income targets in each of the three years following the acquisition. In the fourth quarter of fiscal 2020, we acquired BlueWater Federal Solutions, Inc. ("BWF"), a leading information technology management consulting firm based in Chantilly, Virginia. BWF is part of our GSG segment. The fair value of the purchase price w as $47.7 million. T his amount was comprised of $41.8 million in initial cash payments made to the sellers, $0.7 million of payables related to estimated post-closing adjustments for net assets acquired, and $5.2 million for the estimated fair value of contingent earn-out obligations, with a maximum of $8.0 million, based upon the achievement of specified operating income targets in each of the three years following the acquisition. Goodwill additions resulting from the acquisition of CRD is primarily attributable to the significant technical expertise residing in an embedded workforce that is sought out by clients, and the synergies expected to arise after the acquisition. The fiscal 2020 goodwill additions represent the value of a workforce with distinct expertise in the high-end information technology field, in the areas of data analytics, modeling and simulation, cloud, and agile software development. In addition, these acquired capabilities, when combined with our existing global consulting and engineering business, result in opportunities that allow us to provide services under contracts that could not have been pursued individually by either us or the acquired companies. The results of these acquisitions were included in our consolidated financial statements from their respective closing dates. These acquisitions were not considered material to our consolidated financial statements. As a result, no pro forma information has been provided. Backlog, client relations and trade name intangible assets include the fair value of existing contracts and the underlying customer relationships with lives ranging from one three Most of our acquisition agreements include contingent earn-out agreements, which are generally based on the achievement of future operating income thresholds. The contingent earn-out arrangements are based on our valuations of the acquired companies and reduce the risk of overpaying for acquisitions if the projected financial results are not achieved. The fair values of any earn-out arrangements are included as part of the purchase price of the acquired companies on their respective acquisition dates. For each transaction, we estimate the fair value of contingent earn-out payments as part of the initial purchase price and record the estimated fair value of contingent consideration as a liability in “Current contingent earn-out liabilities” and “Long-term contingent earn-out liabilities” on the consolidated balance sheets. We consider several factors when determining that contingent earn-out liabilities are part of the purchase price, including the following: (1) the valuation of our acquisitions is not supported solely by the initial consideration paid, and the contingent earn-out formula is a critical and material component of the valuation approach to determining the purchase price; and (2) the former owners of acquired companies that remain as key employees receive compensation other than contingent earn-out payments at a reasonable level compared with the compensation of our other key employees. The contingent earn-out payments are not affected by employment termination. We measure our contingent earn-out liabilities at fair value on a recurring basis using significant unobservable inputs classified within Level 3 of the fair value hierarchy. We use a probability-weighted discounted income approach as a valuation technique to convert future estimated cash flows to a single present value amount. The significant unobservable inputs used in the fair value measurements are operating income projections over the earn-out period (generally two We evaluated our estimated fair value of contingent consideration liabilities for each individual acquisition on a quarterly basis, which included a review of their financial results to-date, the status of ongoing projects in their RUPOs, and the inventory of prospective new contract awards. We also considered the potential impact of the global economic disruption due to the COVID-19 pandemic on our operating income projections over the various earn-out periods. The updated fair value could differ materially from the initial estimates. Changes in the estimated fair value of our contingent earn-out liabilities related to the time component of the present value calculation are reported in interest expense. During the first half of fiscal 2021 and 2020, we recorded adjustments to our contingent earn-out liabilities and reported a net gain in operating income of $0.2 million and $1.6 million, respectively (substantially all in the second quarters of fiscal 2021 and 2020). At March 28, 2021, there was a total potential maximu m of $66.9 million of outstanding contingent consideration related to acquisitions. Of this amount, $28.7 million was estimated as the fair value and accrued on our consolidated balance sheet. If the global economic disruption related to the COVID-19 pandemic is prolonged, we could have significant reductions in our contingent earn-out liabilities and related gains in our operating income in future periods.

Goodwill and Intangible Assets

Goodwill and Intangible Assets	6 Months Ended
	Mar. 28, 2021
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Intangible Assets	Goodwill and Intangible Assets The following table summarizes the changes in the carrying value of goodwill by reportable segment: GSG CIG Total (in thousands) Balance at September 27, 2020 $ 516,315 $ 477,183 $ 993,498 Acquisition activity — 3,675 3,675 Translation 7,874 24,526 32,400 Balance at March 28, 2021 $ 524,189 $ 505,384 $ 1,029,573 Our goodwill balances reflect foreign currency translation adjustments related to our foreign subsidiaries with functional currencies that are different than our reporting currency. These amounts are presented net of reductions from historical impairment adjustments. The gross amounts of goodwill for GSG we re $541.9 million and $534.0 million at March 28, 2021 and September 27, 2020, respectively, excluding accumulated impairment of $17.7 million for each period. The gross amounts of goodwill for CIG were $626.9 million and $598.7 million at March 28, 2021 and September 27, 2020, respectively, excluding accumulated impairment of $121.5 million for each period. We perform our annual goodwill impairment review at the beginning of our fiscal fourth quarter. Our most recent annual review at June 29, 2020 (i.e. the first day of our fourth quarter in fiscal 2020) indicated that we had no impairment of goodwill, and all of our reporting units had estimated fair values that were in excess of their carrying values, including goodwill. All of our reporting units had estimated fair values that exceeded their carrying values by more than 80%, with the exception of our former Asia/Pacific ("ASP") reporting unit, which was in our CIG reportable segment. Our former ASP reporting unit had an estimated fair value that exceeded its carrying value by less than 20%. We also regularly evaluate whether events and circumstances have occurred that may indicate a potential change in the recoverability of goodwill. We perform interim goodwill impairment reviews between our annual reviews if certain events and circumstances have occurred, such as a deterioration in general economic conditions; an increase in the competitive environment; a change in management, key personnel, strategy or customers; negative or declining cash flows; or a decline in actual or planned revenue or earnings compared with actual and projected results of relevant prior periods. Although we believe that our estimates of fair value for these reporting units are reasonable, if financial performance for these reporting units falls significantly below our expectations or market prices for similar business decline, the goodwill for these reporting units could become impaired. On September 2, 2020, Australia announced that it had fallen into economic recession, defined as two consecutive quarters of negative growth, for the first time since 1991 including 7% negative growth in the quarter ending June 30, 2020. This prompted a strategic review of our former ASP reporting unit. As a result of the economic recession in Australia, our revenue growth and profit margin forecasts for our former ASP reporting unit declined from the previous forecast used for our annual goodwill impairment review as of June 29, 2020. We also performed an interim goodwill impairment review of our former ASP reporting unit in September 2020 and recorded a $15.8 million goodwill impairment charge. As a result of the impairment charge, the estimated fair value of our former ASP reporting unit equaled its carrying value of $144.9 million, including $95.5 million of goodwill, at September 27, 2020. On September 28, 2020 (the first day of our fiscal 2021), we merged our former ASP reporting unit into our Client Account Management reporting unit. The following table presents the gross amount and accumulated amortization of our acquired identifiable intangible assets with finite useful lives included in “Intangible assets, net” on the consolidated balance sheets: March 28, 2021 September 27, 2020 Weighted- Gross Accumulated Gross Accumulated ($ in thousands) Client relations 2.6 $ 47,515 $ (41,533) $ 60,775 $ (53,392) Backlog 0.5 30,509 (28,778) 37,682 (32,761) Trade names 1.7 7,205 (5,995) 7,964 (6,325) Total $ 85,229 $ (76,306) $ 106,421 $ (92,478) Amortization expense for the three and six months ended March 28, 2021 was $2.2 million and $5.6 million , respectively, compared to $3.4 million and $6.4 million for the prior-year periods. Estimated amortization expense for the remainder of fiscal 2021 and succeeding years is as follows: Amount (in thousands) 2021 $ 3,547 2022 2,814 2023 1,972 2024 590 Total $ 8,923

Property and Equipment

Property and Equipment	6 Months Ended
	Mar. 28, 2021
Property, Plant and Equipment [Abstract]
Property and Equipment	Property and Equipment Property and equipment consisted of the following: Balance at March 28, September 27, (in thousands) Equipment, furniture and fixtures $ 98,135 $ 90,942 Leasehold improvements 35,995 34,569 Total property and equipment 134,130 125,511 Accumulated depreciation (96,707) (90,004) Property and equipment, net $ 37,423 $ 35,507 The depreciation expense related to property and equipment was $3.1 million and $5.9 million for the three and six months ended March 28, 2021, respectively, compared to $3.1 million

Stock Repurchase and Dividends

Stock Repurchase and Dividends	6 Months Ended
	Mar. 28, 2021
Stock Repurchase And Dividends [Abstract]
Stock Repurchase and Dividends	Stock Repurchase and Dividends On January 27, 2020, the Board of Directors authorized a new $200 million stock repurchase program, which was included in our remaining balance of $207.8 million as of fiscal 2020 year-end. In the first half of fiscal 2021, we repurchased and settl ed 249,714 shares with an average price of $120.14 per share for a total cost of $30 million in the open market. At March 28, 2021, we had a remaining balance of $177.8 million under our stock repu rchase program. The following table presents dividends declared and paid in the first half of fiscal 2021 and 2020: Declare Date Dividend Paid Per Share Record Date Payment Date Dividend Paid November 9, 2020 $ 0.17 November 30, 2020 December 11, 2020 $ 9,198 January 25, 2021 $ 0.17 February 10, 2021 February 26, 2021 9,212 Total dividend paid as of March 28, 2021 $ 18,410 November 11, 2019 $ 0.15 December 2, 2019 December 13, 2019 $ 8,190 January 27, 2020 $ 0.15 February 12, 2020 February 28, 2020 8,224 Total dividend paid as of March 29, 2020 $ 16,414 Subsequent Event. On April 26, 2021, the Board of Directors declared a quarterly cash dividend of $0.20 pe r share payable on May 28, 2021 to stockholders of record as of the close of business on May 12, 2021.

Leases

Leases	6 Months Ended
	Mar. 28, 2021
Leases [Abstract]
Leases	Leases In February 2016, the FASB issued ASU 2016-02 “Leases (Topic 842)”, which is a new standard related to leases to increase transparency and comparability among organizations by requiring the recognition of right-of-use (“ROU”) assets obtained in exchange for lease liabilities on the balance sheet. Most prominent among the changes in the standard is the recognition of ROU assets and lease liabilities by lessees for those leases classified as operating leases. Under the standard, disclosures are required to meet the objective of enabling users of financial statements to assess the amount, timing, and uncertainty of cash flows arising from leases. We elected to adopt the standard, and available practical expedients, effective September 30, 2019 (the first day of our fiscal 2020). These practical expedients allowed us to keep the lease classification assessed under the previous lease accounting standard (ASC 840) without reassessment under the new standard, and allowed all separate lease components, including non-lease components, to be accounted for as a single lease component for all existing leases prior to adoption of the new standard. We adopted this new standard under the modified retrospective transition approach without adjusting comparative periods in the financial statements, as allowed under Leases (Topic 842), and implemented internal controls and key system functionality to enable the preparation of financial information on adoption. The standard had a material impact on our consolidated balance sheets but did not have an impact on the consolidated income statements. The most significant impact was the recognition of ROU assets and lease liabilities for operating leases, while accounting for finance leases remained substantially unchanged. Our finance leases are primarily for certain information technology equipment and the related ROU and lease liabilities were immaterial, and included in "Other current liabilities" and "Other long-term liabilities" accordingly on our consolidated balance sheets at March 28, 2021 and September 2 7, 2020. We determine if an arrangement is a lease at inception. Operating leases are included in operating lease ROU assets and current and long-term operating lease liabilities in the consolidated balance sheets. ROU assets represent our right to use an underlying asset for the lease term and lease liabilities represent our obligation to make lease payments arising from the lease. Operating lease ROU assets and liabilities are recognized at commencement date based on the present value of lease payments over the lease term. As most of our leases do not provide an implicit rate, incremental borrowing rates are used based on the information available at commencement date in determining the present value of lease payments. The operating lease ROU asset also includes any lease payments made and excludes lease incentives. Lease terms may include options to extend or terminate the lease when it is reasonably certain that we will exercise that option. Lease expense for operating lease payments is recognized on a straight-line basis over the lease term. Our operating leases are primarily for corporate and project office spaces. To a much lesser extent, we have operating leases for vehicles and equipment. Our operating leases have remaining lease terms of one month to twelve years, some of which may include options to extend the leases for up to five years. The components of lease costs are as follows: Three Months Ended Six Months Ended March 28, March 29, March 28, March 29, (in thousands) Operating lease cost $ 22,640 $ 21,595 $ 44,709 $ 42,767 Sublease income (30) (541) (59) (1,115) Other — 18 — 36 Total lease cost $ 22,610 $ 21,072 $ 44,650 $ 41,688 Supplemental cash flow information related to leases is as follows: Three Months Ended Six Months Ended March 28, March 29, March 28, March 29, (in thousands) Operating cash flows for operating leases $ 17,599 $ 21,789 $ 36,399 $ 41,504 Right-of-use assets obtained in exchange for new operating lease liabilities $ 23,429 $ 59,671 $ 33,722 $ 321,919 Supplemental balance sheet and other information related to leases are as follows: Balance at March 28, 2021 September 27, 2020 (in thousands) Operating leases: Right-of-use assets $ 222,922 $ 239,396 Lease liabilities: Current 68,941 69,650 Long-term 179,645 191,955 Total operating lease liabilities $ 248,586 $ 261,605 Weighted-average remaining lease term: Operating leases 5 years 5 years Weighted-average discount rate: Operating leases 2.4 % 2.5 % As of March 28, 2021, we do not have any material additional operating leases that have not yet commenced. A maturity analysis of the future undiscounted cash flows associated with our operating lease liabilities is as follows: Balance at March 28, September 27, (in thousands) 2021 $ 39,951 $ 75,074 2022 70,500 64,972 2023 48,703 44,733 2024 33,627 30,991 2025 24,030 21,466 Beyond 49,021 44,169 Total lease payments 265,832 281,405 Less: imputed interest (17,246) (19,800) Total present value of lease liabilities $ 248,586 $ 261,605
Leases	Leases In February 2016, the FASB issued ASU 2016-02 “Leases (Topic 842)”, which is a new standard related to leases to increase transparency and comparability among organizations by requiring the recognition of right-of-use (“ROU”) assets obtained in exchange for lease liabilities on the balance sheet. Most prominent among the changes in the standard is the recognition of ROU assets and lease liabilities by lessees for those leases classified as operating leases. Under the standard, disclosures are required to meet the objective of enabling users of financial statements to assess the amount, timing, and uncertainty of cash flows arising from leases. We elected to adopt the standard, and available practical expedients, effective September 30, 2019 (the first day of our fiscal 2020). These practical expedients allowed us to keep the lease classification assessed under the previous lease accounting standard (ASC 840) without reassessment under the new standard, and allowed all separate lease components, including non-lease components, to be accounted for as a single lease component for all existing leases prior to adoption of the new standard. We adopted this new standard under the modified retrospective transition approach without adjusting comparative periods in the financial statements, as allowed under Leases (Topic 842), and implemented internal controls and key system functionality to enable the preparation of financial information on adoption. The standard had a material impact on our consolidated balance sheets but did not have an impact on the consolidated income statements. The most significant impact was the recognition of ROU assets and lease liabilities for operating leases, while accounting for finance leases remained substantially unchanged. Our finance leases are primarily for certain information technology equipment and the related ROU and lease liabilities were immaterial, and included in "Other current liabilities" and "Other long-term liabilities" accordingly on our consolidated balance sheets at March 28, 2021 and September 2 7, 2020. We determine if an arrangement is a lease at inception. Operating leases are included in operating lease ROU assets and current and long-term operating lease liabilities in the consolidated balance sheets. ROU assets represent our right to use an underlying asset for the lease term and lease liabilities represent our obligation to make lease payments arising from the lease. Operating lease ROU assets and liabilities are recognized at commencement date based on the present value of lease payments over the lease term. As most of our leases do not provide an implicit rate, incremental borrowing rates are used based on the information available at commencement date in determining the present value of lease payments. The operating lease ROU asset also includes any lease payments made and excludes lease incentives. Lease terms may include options to extend or terminate the lease when it is reasonably certain that we will exercise that option. Lease expense for operating lease payments is recognized on a straight-line basis over the lease term. Our operating leases are primarily for corporate and project office spaces. To a much lesser extent, we have operating leases for vehicles and equipment. Our operating leases have remaining lease terms of one month to twelve years, some of which may include options to extend the leases for up to five years. The components of lease costs are as follows: Three Months Ended Six Months Ended March 28, March 29, March 28, March 29, (in thousands) Operating lease cost $ 22,640 $ 21,595 $ 44,709 $ 42,767 Sublease income (30) (541) (59) (1,115) Other — 18 — 36 Total lease cost $ 22,610 $ 21,072 $ 44,650 $ 41,688 Supplemental cash flow information related to leases is as follows: Three Months Ended Six Months Ended March 28, March 29, March 28, March 29, (in thousands) Operating cash flows for operating leases $ 17,599 $ 21,789 $ 36,399 $ 41,504 Right-of-use assets obtained in exchange for new operating lease liabilities $ 23,429 $ 59,671 $ 33,722 $ 321,919 Supplemental balance sheet and other information related to leases are as follows: Balance at March 28, 2021 September 27, 2020 (in thousands) Operating leases: Right-of-use assets $ 222,922 $ 239,396 Lease liabilities: Current 68,941 69,650 Long-term 179,645 191,955 Total operating lease liabilities $ 248,586 $ 261,605 Weighted-average remaining lease term: Operating leases 5 years 5 years Weighted-average discount rate: Operating leases 2.4 % 2.5 % As of March 28, 2021, we do not have any material additional operating leases that have not yet commenced. A maturity analysis of the future undiscounted cash flows associated with our operating lease liabilities is as follows: Balance at March 28, September 27, (in thousands) 2021 $ 39,951 $ 75,074 2022 70,500 64,972 2023 48,703 44,733 2024 33,627 30,991 2025 24,030 21,466 Beyond 49,021 44,169 Total lease payments 265,832 281,405 Less: imputed interest (17,246) (19,800) Total present value of lease liabilities $ 248,586 $ 261,605

Stockholders' Equity and Stock

Stockholders' Equity and Stock Compensation Plans	6 Months Ended
	Mar. 28, 2021
Stockholders' Equity Note [Abstract]
Stockholders' Equity and Stock Compensation Plans	Stockholders’ Equity and Stock Compensation Plans We recognize the fair value of our stock-based awards as compensation expense on a straight-line basis over the requisite service period in which the award vests. Stock-based compensation expense for the three and six months ended March 28, 2021 w as $5.7 million and $10.6 million, respectively, compared to $5.0 million and $9.4 million for the same periods last year. Most of these amounts were included in selling, general and administrative expenses on our consolidated statements of income. In the first half of fiscal 2021, we award ed 57,542 performance share units (“PSUs”) to our non-employee directors and executive officers at a fair value of $153.03 per share on the award date. All PSUs are performance-based and vest, if at all, after the conclusion of the three-year performance period. The number of PSUs that ultimately vest is based 50% on the growth in our diluted earnings per share and 50% on our relative total shareholder return over the vesting period. Additionally, we award ed 108,464 restricted stock units (“RSUs”) to our non-employee directors, executive officers and employees at a fair value of $121.17 per

Earnings per Share ("EPS")

Earnings per Share ("EPS")	6 Months Ended
	Mar. 28, 2021
Earnings Per Share [Abstract]
Earnings per Share ("EPS")	Earnings per Share (“EPS”) Basic EPS is computed by dividing net income available to common stockholders by the weighted-average number of common shares outstanding, less unvested restricted stock for the period. Diluted EPS is computed by dividing net income by the weighted-average number of common shares outstanding and dilutive potential common shares for the period. Potential common shares include the weighted-average dilutive effects of outstanding stock options and unvested restricted stock using the treasury stock method. The following table presents the number of weighted-average shares used to compute basic and diluted EPS: Three Months Ended Six Months Ended March 28, March 29, March 28, March 29, (in thousands, except per share data) Net income attributable to Tetra Tech $ 45,517 $ 36,397 $ 97,953 $ 83,707 Weighted-average common shares outstanding – basic 54,187 54,699 54,085 54,541 Effect of dilutive stock options and unvested restricted stock 549 764 630 839 Weighted-average common shares outstanding – diluted 54,736 55,463 54,715 55,380 Earnings per share attributable to Tetra Tech: Basic $ 0.84 $ 0.67 $ 1.81 $ 1.53 Diluted $ 0.83 $ 0.66 $ 1.79 $ 1.51

Income Taxes

Income Taxes	6 Months Ended
	Mar. 28, 2021
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The effective tax rates for the first half of fiscal 2021 and 2020 were 19.2% and 19.5%, respectively. Income tax expense was reduced by $8.0 million and $6.7 million of excess tax benefits on share-based payments in the first half of fiscal 2021 and 2020, respectively. Excluding the impact of the excess tax benefits on share-based payments, our effective tax rates in the first half of fiscal 2021 and 2020 were 25.8% and 25.9%, respectively. As of March 28, 2021 and September 27, 2020, the liability for income taxes associated with uncertain tax positions was $10.0 million and $9.7 million, respectively. Th ese uncertain tax positions substantially relate to ongoing examinations, which are reasonably likely to be resolved within the next 12 months. These liabilities represent our current estimates of the additional tax liabilities that we may be assessed when the related audits are concluded. If these audits are resolved in a manner more unfavorable than our current expectations, our additional tax liabilities could be materially higher than the amounts currently recorded resulting in additional tax expense.

Reportable Segments

Reportable Segments	6 Months Ended
	Mar. 28, 2021
Segment Reporting [Abstract]
Reportable Segments	Reportable Segments We manage our operations under two reportable segments. Our GSG reportable segment primarily includes activities with U.S. government clients (federal, state and local) and all activities with development agencies worldwide. Our CIG reportable segment primarily includes activities with U.S. commercial clients and international clients other than development agencies. Additionally , we continue to report the results of the wind-down of our non-core construction activities in the RCM reportable segment. Substantially, there has been no remaining backlog for RCM since fiscal 2018 as the projects were complete. GSG provides consulting and engineering services primarily to U.S. government clients (federal, state and local) and development agencies worldwide. GSG supports U.S. government civilian and defense agencies with services in water, environment, sustainable infrastructure, information technology, and disaster management. GSG also provides engineering design services for U.S. municipal and commercial clients, especially in water infrastructure, solid waste, and high-end sustainable infrastructure designs. GSG also leads our support for development agencies worldwide, especially in the United States, United Kingdom, and Australia. CIG primarily provides consulting and engineering services to U.S. commercial clients, and international clients that include both commercial and government sectors. CIG supports commercial clients across the Fortune 500, energy utilities, industrial, manufacturing, aerospace, and resource management markets. CIG also provides infrastructure and related environmental, engineering and project management services to commercial and local government clients across Canada, in Asia Pacific (primarily Australia and New Zealand), the United Kingdom, as well as Brazil and Chile. Management evaluates the performance of these reportable segments based upon their respective segment operating income before the effect of amortization expense related to acquisitions, and other unallocated corporate expenses. We account for inter-segment revenues and transfers as if they were to third parties; that is, by applying a negotiated fee onto the costs of the services performed. All significant intercompany balances and transactions are eliminated in consolidation. Reportable Segments The following tables summarize financial information regarding our reportable segments: Three Months Ended Six Months Ended March 28, March 29, March 28, March 29, (in thousands) Revenue GSG $ 473,829 $ 436,903 $ 942,451 $ 894,307 CIG 293,128 308,412 604,152 659,576 RCM 470 5 470 150 Elimination of inter-segment revenue (12,663) (11,187) (27,205) (22,277) Total $ 754,764 $ 734,133 $ 1,519,868 $ 1,531,756 Income from operations GSG $ 46,109 $ 35,347 $ 93,809 $ 77,395 CIG 26,311 21,676 55,869 53,309 RCM 1 (1) 1 1 Corporate (1) (11,614) (9,492) (22,620) (19,873) Total $ 60,807 $ 47,530 $ 127,059 $ 110,832 (1) Includes amortization of intangibles, other costs and other income not allocable to our reportable segments. Balance at March 28, September 27, (in thousands) Total Assets GSG $ 635,217 $ 649,417 CIG 463,176 479,238 RCM 11,369 14,258 Corporate (1) 1,345,300 1,235,645 Total $ 2,455,062 $ 2,378,558 (1) Corporate assets consist of intercompany eliminations and assets not allocated to our reportable segments including goo dwill, intangible assets, deferred income taxes and certain other assets

Fair Value Measurements

Fair Value Measurements	6 Months Ended
	Mar. 28, 2021
Fair Value Disclosures [Abstract]
Fair Value Measurements	Fair Value Measurements The fair value of long-term debt was determined using the present value of future cash flows based on the borrowing rates currently available for debt with similar terms and maturities (Level 2 measurement, as described in “Critical Accounting Policies and Estimates” in our Annual Report on Form 10-K for the fiscal year ended September 27, 2020). The carrying value of our long-term debt approximated fair value at March 28, 2021 and September 27, 2020. At March 28, 2021, we had borrowings of $250.8 million outstanding under our Amended Credit Agreement, which were used to fund business acquisitions, working capital needs, stock repurchases, dividends, capital expenditures and contingent earn-outs.

Derivative Financial Instrument

Derivative Financial Instruments	6 Months Ended
	Mar. 28, 2021
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Financial Instruments	Derivative Financial Instruments We often use certain interest rate derivative contracts to hedge interest rate exposures on our variable rate debt. Also, we may enter in foreign currency derivative contracts with financial institutions to reduce the risk that cash flows and earnings could adversely be affected by foreign currency exchange rate fluctuations. Our hedging program is not designated for trading or speculative purposes. We recognize derivative instruments as either assets or liabilities on the accompanying consolidated balance sheets at fair value. We record changes in the fair value (i.e., gains or losses) of the derivatives that have been designated as cash flow hedges in our consolidated balance sheets as accumulated other comprehensive income, and in our consolidated statements of income for those derivatives designated as fair value hedges. In fiscal 2018, we entered into five interest rate swap agreements that we designated as cash flow hedges to fix the interest rate on the borrowings under our term loan facility. As of March 28, 2021, the notional principal of our outstanding interest swap agreements w as $221.9 million ($44.4 million each.) The interest rate swaps have a fixed interest rate of 2.79% and expire in July 2023 for all five agreements. At March 28, 2021 and September 27, 2020, the fair value of the effective portion of our interest rate swap agreements designated as cash flow hedges before tax effect w as $(12.1) million and $(15.5) million, which were reported in "Other current liabilities" on our consolidated balance sheets. Additionally, the related gains of $1.9 million and $3.4 million for the three and six months ended March 28, 2021, respectively, compared to related losses of $7.4 million and $5.7 million for the prior-year periods, were recognized and reported on our consolidated statements of comprehensive income. We expect to reclas sify $5.7 million from accumulated other comprehensive loss to interest expense within the next twelve months. There were no other derivative instruments designated as hedging instruments for the first half of fiscal 2021.

Reclassifications Out of Accumu

Reclassifications Out of Accumulated Other Comprehensive Income	6 Months Ended
	Mar. 28, 2021
Equity [Abstract]
Reclassifications Out of Accumulated Other Comprehensive Income	Reclassifications Out of Accumulated Other Comprehensive Income The accumulated balances and activities for the three and six months ended March 28, 2021 and March 29, 2020 related to reclassifications out of accumulated other comprehensive income are summarized as follows: Three Months Ended Foreign Gain (Loss) Accumulated Other Comprehensive Income (Loss) (in thousands) Balance at December 29, 2019 $ (135,812) $ (9,203) $ (145,015) Other comprehensive loss before reclassifications (47,011) (6,727) (53,738) Amounts reclassified from accumulated other comprehensive loss Interest rate contracts, net of tax (1) — (638) (638) Net current-period other comprehensive loss (47,011) (7,365) (54,376) Balance at March 29, 2020 $ (182,823) $ (16,568) $ (199,391) Balance at December 27, 2020 $ (113,884) $ (14,035) $ (127,919) Other comprehensive income before reclassifications 10,973 3,382 14,355 Amounts reclassified from accumulated other comprehensive income Interest rate contracts, net of tax (1) — (1,492) (1,492) Net current-period other comprehensive income 10,973 1,890 12,863 Balance at March 28, 2021 $ (102,911) $ (12,145) $ (115,056) Six Months Ended Foreign Gain (Loss) Accumulated Other Comprehensive Income (Loss) (in thousands) Balance at September 29, 2019 $ (149,711) $ (10,873) $ (160,584) Other comprehensive loss before reclassifications (33,112) (4,574) (37,686) Amounts reclassified from accumulated other comprehensive loss Interest rate contracts, net of tax (1) — (1,121) (1,121) Net current-period other comprehensive loss (33,112) (5,695) (38,807) Balance at March 29, 2020 $ (182,823) $ (16,568) $ (199,391) Balance at September 27, 2020 $ (146,275) $ (15,511) $ (161,786) Other comprehensive income before reclassifications 43,364 6,360 49,724 Amounts reclassified from accumulated other comprehensive income Interest rate contracts, net of tax (1) — (2,994) (2,994) Net current-period other comprehensive income 43,364 3,366 46,730 Balance at March 28, 2021 $ (102,911) $ (12,145) $ (115,056) (1) This accumulated other comprehensive component is reclassified to “Interest expense” in our consolidated statements of income. See Note 14 , “Derivative Financial Instruments”, for more information.

Commitments and Contingencies

Commitments and Contingencies	6 Months Ended
	Mar. 28, 2021
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies We are subject to certain claims and lawsuits typically filed against the consulting and engineering profession, alleging primarily professional errors or omissions. We carry professional liability insurance, subject to certain deductibles and policy limits, against such claims. However, in some actions, parties are seeking damages that exceed our insurance coverage or for which we are not insured. While management does not believe that the resolution of these claims will have a material adverse effect, individually or in aggregate, on our financial position, results of operations or cash flows, management acknowledges the uncertainty surrounding the ultimate resolution of these matters. On July 15, 2019, following an initial January 14, 2019 filing, the Civil Division of the United States Attorney's Office filed an amended complaint in intervention in three qui tam actions filed against our subsidiary, Tetra Tech EC, Inc. ("TtEC"), in the U.S. District Court for the Northern District of California. The complaint alleges False Claims Act violations and breach of contract related to TtEC's contracts to perform environmental remediation services at the former Hunters Point Naval Shipyard in San Francisco, California. TtEC disputes the claims and will defend this matter vigorously. We are currently unable to determine the probability of the outcome of this matter or the range of reasonably possible loss, if any.

Related Party Transactions

Related Party Transactions	6 Months Ended
	Mar. 28, 2021
Related Party Transactions [Abstract]
Related Party Transactions	Related Party Transactions We often provide services to unconsolidated joint ventures. Revenue generated from the services we provided to unconsolidated joint ventures for the three and six months of fiscal 2021 was approxim ately $24 million and $46 million, respectively, compared to $19 million and $48 million for the same periods last year. Related reimbursable costs for the three and six months of fiscal 2021 were approximately the same as revenue since these reimbursable costs are pass-through costs. Our consolidated balance sheets also included the following amounts related to these services: Balance at March 28, September 27, 2020 (in thousands) Accounts receivable, net $ 20,789 $ 20,884 Contract assets 4,641 3,261 Contract liabilities 2,486 478

Recent Accounting Pronounceme_2

Recent Accounting Pronouncements (Policies)	6 Months Ended
	Mar. 28, 2021
Accounting Changes and Error Corrections [Abstract]
Recent Accounting Pronouncements	In June 2016, the Financial Accounting Standards Board ("FASB") issued updated guidance, Accounting Standards Update ("ASU") 2016-13, related to the measurement of credit losses for certain financial assets. This guidance replaces the current incurred loss methodology with an expected credit loss methodology. It requires us to recognize an allowance equal to our current estimate of all contractual cash flows that we do not expect to collect. Our estimate would consider relevant information about past events, current conditions, and reasonable and supportable forecasts impacting the collectability of the reported amounts. We adopted this guidance in the first quarter of fiscal 2021, and the adoption did not have a material impact on our consolidated financial statements. In August 2018, the FASB issued updated guidance modifying certain fair value measurement disclosures. The guidance contains additional disclosures to enable users of the financial statements to better understand the entity’s assumptions used to develop significant unobservable inputs for Level 3 fair value measurements, but also eliminates the requirement for entities to disclose the amount of and reasons for transfers between Level 1 and Level 2 investments within the fair value hierarchy. We adopted this guidance in the first quarter of fiscal 2021, and the adoption did not have a material impact on our consolidated financial statements. In December 2019, the FASB issued guidance simplifying the accounting for income taxes by removing certain exceptions to general principles in Topic 740 and amending certain existing guidance for clarity. This guidance is effective for fiscal years and interim periods within those fiscal years, beginning after December 15, 2020 (first quarter of fiscal 2022 for us). Early adoption is permitted. We do not expect the adoption of this guidance to have a material impact on our consolidated financial statements. In May 2020, the Securities and Exchange Commission issued guidance amending certain financial disclosures about acquired and disposed businesses. The amendments are designed to assist registrants in making more meaningful determinations of whether a subsidiary or an acquired or disposed business is significant, and to improve the related disclosure requirements. The guidance is effective for fiscal years beginning after December 31, 2020 (first quarter of fiscal 2022 for us). We do not expect the adoption of this guidance to have a material impact on our consolidated financial statements.
Revenue and Contract Assets and Contract Liabilities	We invoice customers based on the contractual terms of each contract. However, the timing of revenue recognition may differ from the timing of invoice issuance. Contract assets represent revenue recognized in excess of the amounts for which we have the contractual right to bill our customers. Such amounts are recoverable from customers based upon various measures of performance, including achievement of certain milestones or completion of a contract. In addition, many of our time and materials arrangements are billed in arrears pursuant to contract terms that are standard within the industry, resulting in contract assets and/or unbilled receivables being recorded, as revenue is recognized in advance of billings. Contract retentions, included in contract assets, represent amounts withheld by clients until certain conditions are met or the project is completed, which may extend beyond one year. Our RUPOs represent a measure of the total dollar value of work to be performed on contracts awarded and in progress. We had $3.1 billion of RU POs as of March 28, 2021. RUPOs increase with awards from new contracts or additions on existing contracts and decrease as work is performed and revenue is recognized on existing contracts. RUPOs may also decrease when projects are canceled or modified in scope. We include a contract within our RUPOs when the contract is awarded and an agreement on contract terms has been reached.
Accounts Receivable, Net	Billed accounts receivable represent amounts billed to clients that have not been collected. Unbilled accounts receivable, which represent an unconditional right to payment subject only to the passage of time, include unbilled amounts typically resulting from revenue recognized but not yet billed pursuant to contract terms or billed after the period end date. Substantially all of our unbilled receivables at March 28, 2021 are expected to be billed and collecte d within 12 months. The allowance for doubtful accounts represents amounts that are expected to become uncollectible or unrealizable in the future. We determine an estimated allowance for uncollectible accounts based on management's consideration of trends in the actual and forecasted credit quality of our clients, including delinquency and payment history; type of client, such as a government agency or a commercial sector client; and general economic and industry conditions, including the potential impacts of the coronavirus disease 2019 ("COVID-19") pandemic, that may affect our clients' ability to pay.

Revenue and Contract Balances (

Revenue and Contract Balances (Tables)	6 Months Ended
	Mar. 28, 2021
Revenue from Contract with Customer [Abstract]
Summary of revenue disaggregated by client sector and contract type	The following tables present revenue disaggregated by client sector and contract type: Three Months Ended Six Months Ended March 28, March 29, March 28, March 29, (in thousands) Client Sector: U.S. state and local government $ 129,781 $ 103,671 $ 254,747 $ 227,507 U.S. federal government (1) 267,696 243,261 533,561 488,564 U.S. commercial 143,702 160,787 301,508 342,278 International (2) 213,585 226,414 430,052 473,407 Total $ 754,764 $ 734,133 $ 1,519,868 $ 1,531,756 Contract Type: Fixed-price $ 272,118 $ 255,613 $ 546,551 $ 526,668 Time-and-materials 347,197 350,618 702,438 738,776 Cost-plus 135,449 127,902 270,879 266,312 Total $ 754,764 $ 734,133 $ 1,519,868 $ 1,531,756 (1) Includes revenue generated under U.S. federal government contracts performed outside the United States. (2) Includes revenue generated from foreign operations, primarily in Canada, Australia, the United Kingdom, and revenue generated from non-U.S. clients.
Summary of net contract assets/liabilities	Net contract assets/liabilities consisted of the following: Balance at March 28, September 27, 2020 (in thousands) Contract assets (1) $ 95,079 $ 92,632 Contract liabilities (185,602) (171,905) Net contract liabilities $ (90,523) $ (79,273) (1) Includes $7.4 million
Components of net accounts receivable	Net accounts receivable consisted of the following: Balance at March 28, September 27, (in thousands) Billed $ 380,522 $ 402,818 Unbilled 253,784 253,364 Total accounts receivable 634,306 656,182 Allowance for doubtful accounts (5,120) (7,147) Total accounts receivable, net $ 629,186 $ 649,035
Remaining performance obligation, expected timing	We expect to satisfy our RUPOs as of March 28, 2021 over the following periods: Amount (in thousands) Within 12 months $ 1,828,946 Beyond 1,298,902 Total $ 3,127,848

Goodwill and Intangible Assets

Goodwill and Intangible Assets (Tables)	6 Months Ended
	Mar. 28, 2021
Goodwill and Intangible Assets Disclosure [Abstract]
Summary of changes in the carrying value of goodwill	The following table summarizes the changes in the carrying value of goodwill by reportable segment: GSG CIG Total (in thousands) Balance at September 27, 2020 $ 516,315 $ 477,183 $ 993,498 Acquisition activity — 3,675 3,675 Translation 7,874 24,526 32,400 Balance at March 28, 2021 $ 524,189 $ 505,384 $ 1,029,573
Summary of acquired identifiable intangible assets with finite useful lives	The following table presents the gross amount and accumulated amortization of our acquired identifiable intangible assets with finite useful lives included in “Intangible assets, net” on the consolidated balance sheets: March 28, 2021 September 27, 2020 Weighted- Gross Accumulated Gross Accumulated ($ in thousands) Client relations 2.6 $ 47,515 $ (41,533) $ 60,775 $ (53,392) Backlog 0.5 30,509 (28,778) 37,682 (32,761) Trade names 1.7 7,205 (5,995) 7,964 (6,325) Total $ 85,229 $ (76,306) $ 106,421 $ (92,478)
Estimated amortization expense for the remainder of the fiscal year and the succeeding years	Estimated amortization expense for the remainder of fiscal 2021 and succeeding years is as follows: Amount (in thousands) 2021 $ 3,547 2022 2,814 2023 1,972 2024 590 Total $ 8,923

Property and Equipment (Tables)

Property and Equipment (Tables)	6 Months Ended
	Mar. 28, 2021
Property, Plant and Equipment [Abstract]
Schedule of components of property and equipment	Property and equipment consisted of the following: Balance at March 28, September 27, (in thousands) Equipment, furniture and fixtures $ 98,135 $ 90,942 Leasehold improvements 35,995 34,569 Total property and equipment 134,130 125,511 Accumulated depreciation (96,707) (90,004) Property and equipment, net $ 37,423 $ 35,507

Stock Repurchase and Dividends

Stock Repurchase and Dividends (Tables)	6 Months Ended
	Mar. 28, 2021
Stock Repurchase And Dividends [Abstract]
Summary of dividends declared and paid	The following table presents dividends declared and paid in the first half of fiscal 2021 and 2020: Declare Date Dividend Paid Per Share Record Date Payment Date Dividend Paid November 9, 2020 $ 0.17 November 30, 2020 December 11, 2020 $ 9,198 January 25, 2021 $ 0.17 February 10, 2021 February 26, 2021 9,212 Total dividend paid as of March 28, 2021 $ 18,410 November 11, 2019 $ 0.15 December 2, 2019 December 13, 2019 $ 8,190 January 27, 2020 $ 0.15 February 12, 2020 February 28, 2020 8,224 Total dividend paid as of March 29, 2020 $ 16,414

Leases (Tables)

Leases (Tables)	6 Months Ended
	Mar. 28, 2021
Leases [Abstract]
Summary of components of lease cost	The components of lease costs are as follows: Three Months Ended Six Months Ended March 28, March 29, March 28, March 29, (in thousands) Operating lease cost $ 22,640 $ 21,595 $ 44,709 $ 42,767 Sublease income (30) (541) (59) (1,115) Other — 18 — 36 Total lease cost $ 22,610 $ 21,072 $ 44,650 $ 41,688 Supplemental cash flow information related to leases is as follows: Three Months Ended Six Months Ended March 28, March 29, March 28, March 29, (in thousands) Operating cash flows for operating leases $ 17,599 $ 21,789 $ 36,399 $ 41,504 Right-of-use assets obtained in exchange for new operating lease liabilities $ 23,429 $ 59,671 $ 33,722 $ 321,919
Summary of supplemental balance sheet and other information	Supplemental balance sheet and other information related to leases are as follows: Balance at March 28, 2021 September 27, 2020 (in thousands) Operating leases: Right-of-use assets $ 222,922 $ 239,396 Lease liabilities: Current 68,941 69,650 Long-term 179,645 191,955 Total operating lease liabilities $ 248,586 $ 261,605 Weighted-average remaining lease term: Operating leases 5 years 5 years Weighted-average discount rate: Operating leases 2.4 % 2.5 %
Summary of maturity of future undiscounted cash flows associated with operating lease liabilities	A maturity analysis of the future undiscounted cash flows associated with our operating lease liabilities is as follows: Balance at March 28, September 27, (in thousands) 2021 $ 39,951 $ 75,074 2022 70,500 64,972 2023 48,703 44,733 2024 33,627 30,991 2025 24,030 21,466 Beyond 49,021 44,169 Total lease payments 265,832 281,405 Less: imputed interest (17,246) (19,800) Total present value of lease liabilities $ 248,586 $ 261,605

Earnings per Share ("EPS") (Tab

Earnings per Share ("EPS") (Tables)	6 Months Ended
	Mar. 28, 2021
Earnings Per Share [Abstract]
Schedule of number of weighted-average shares used to compute basic and diluted EPS	The following table presents the number of weighted-average shares used to compute basic and diluted EPS: Three Months Ended Six Months Ended March 28, March 29, March 28, March 29, (in thousands, except per share data) Net income attributable to Tetra Tech $ 45,517 $ 36,397 $ 97,953 $ 83,707 Weighted-average common shares outstanding – basic 54,187 54,699 54,085 54,541 Effect of dilutive stock options and unvested restricted stock 549 764 630 839 Weighted-average common shares outstanding – diluted 54,736 55,463 54,715 55,380 Earnings per share attributable to Tetra Tech: Basic $ 0.84 $ 0.67 $ 1.81 $ 1.53 Diluted $ 0.83 $ 0.66 $ 1.79 $ 1.51

Reportable Segments (Tables)

Reportable Segments (Tables)	6 Months Ended
	Mar. 28, 2021
Segment Reporting [Abstract]
Summarized financial information of reportable segments	The following tables summarize financial information regarding our reportable segments: Three Months Ended Six Months Ended March 28, March 29, March 28, March 29, (in thousands) Revenue GSG $ 473,829 $ 436,903 $ 942,451 $ 894,307 CIG 293,128 308,412 604,152 659,576 RCM 470 5 470 150 Elimination of inter-segment revenue (12,663) (11,187) (27,205) (22,277) Total $ 754,764 $ 734,133 $ 1,519,868 $ 1,531,756 Income from operations GSG $ 46,109 $ 35,347 $ 93,809 $ 77,395 CIG 26,311 21,676 55,869 53,309 RCM 1 (1) 1 1 Corporate (1) (11,614) (9,492) (22,620) (19,873) Total $ 60,807 $ 47,530 $ 127,059 $ 110,832 (1) Includes amortization of intangibles, other costs and other income not allocable to our reportable segments. Balance at March 28, September 27, (in thousands) Total Assets GSG $ 635,217 $ 649,417 CIG 463,176 479,238 RCM 11,369 14,258 Corporate (1) 1,345,300 1,235,645 Total $ 2,455,062 $ 2,378,558 (1) Corporate assets consist of intercompany eliminations and assets not allocated to our reportable segments including goo dwill, intangible assets, deferred income taxes and certain other assets

Reclassifications Out of Accu_2

Reclassifications Out of Accumulated Other Comprehensive Income (Tables)	6 Months Ended
	Mar. 28, 2021
Equity [Abstract]
Summary of reclassifications out of accumulated other comprehensive income	The accumulated balances and activities for the three and six months ended March 28, 2021 and March 29, 2020 related to reclassifications out of accumulated other comprehensive income are summarized as follows: Three Months Ended Foreign Gain (Loss) Accumulated Other Comprehensive Income (Loss) (in thousands) Balance at December 29, 2019 $ (135,812) $ (9,203) $ (145,015) Other comprehensive loss before reclassifications (47,011) (6,727) (53,738) Amounts reclassified from accumulated other comprehensive loss Interest rate contracts, net of tax (1) — (638) (638) Net current-period other comprehensive loss (47,011) (7,365) (54,376) Balance at March 29, 2020 $ (182,823) $ (16,568) $ (199,391) Balance at December 27, 2020 $ (113,884) $ (14,035) $ (127,919) Other comprehensive income before reclassifications 10,973 3,382 14,355 Amounts reclassified from accumulated other comprehensive income Interest rate contracts, net of tax (1) — (1,492) (1,492) Net current-period other comprehensive income 10,973 1,890 12,863 Balance at March 28, 2021 $ (102,911) $ (12,145) $ (115,056) Six Months Ended Foreign Gain (Loss) Accumulated Other Comprehensive Income (Loss) (in thousands) Balance at September 29, 2019 $ (149,711) $ (10,873) $ (160,584) Other comprehensive loss before reclassifications (33,112) (4,574) (37,686) Amounts reclassified from accumulated other comprehensive loss Interest rate contracts, net of tax (1) — (1,121) (1,121) Net current-period other comprehensive loss (33,112) (5,695) (38,807) Balance at March 29, 2020 $ (182,823) $ (16,568) $ (199,391) Balance at September 27, 2020 $ (146,275) $ (15,511) $ (161,786) Other comprehensive income before reclassifications 43,364 6,360 49,724 Amounts reclassified from accumulated other comprehensive income Interest rate contracts, net of tax (1) — (2,994) (2,994) Net current-period other comprehensive income 43,364 3,366 46,730 Balance at March 28, 2021 $ (102,911) $ (12,145) $ (115,056) (1) This accumulated other comprehensive component is reclassified to “Interest expense” in our consolidated statements of income. See Note 14 , “Derivative Financial Instruments”, for more information.

Related Party Transactions (Tab

Related Party Transactions (Tables)	6 Months Ended
	Mar. 28, 2021
Related Party Transactions [Abstract]
Schedule of related party transactions	Our consolidated balance sheets also included the following amounts related to these services: Balance at March 28, September 27, 2020 (in thousands) Accounts receivable, net $ 20,789 $ 20,884 Contract assets 4,641 3,261 Contract liabilities 2,486 478

Revenue and Contract Balances -

Revenue and Contract Balances - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 28, 2021	Mar. 29, 2020	Mar. 28, 2021	Mar. 29, 2020
Disaggregation of Revenue [Line Items]
Revenue	$ 754,764	$ 734,133	$ 1,519,868	$ 1,531,756
Fixed-price
Disaggregation of Revenue [Line Items]
Revenue	272,118	255,613	546,551	526,668
Time-and-materials
Disaggregation of Revenue [Line Items]
Revenue	347,197	350,618	702,438	738,776
Cost-plus
Disaggregation of Revenue [Line Items]
Revenue	135,449	127,902	270,879	266,312
U.S. state and local government
Disaggregation of Revenue [Line Items]
Revenue	129,781	103,671	254,747	227,507
U.S. federal government
Disaggregation of Revenue [Line Items]
Revenue	267,696	243,261	533,561	488,564
U.S. commercial
Disaggregation of Revenue [Line Items]
Revenue	143,702	160,787	301,508	342,278
International
Disaggregation of Revenue [Line Items]
Revenue	$ 213,585	$ 226,414	$ 430,052	$ 473,407

Revenue and Contract Balances_2

Revenue and Contract Balances - Summary of Contract Liabilities/Assets (Details) - USD ($) $ in Thousands	Mar. 28, 2021	Sep. 27, 2020
Revenue from Contract with Customer [Abstract]
Contract assets	$ 95,079	$ 92,632
Contract liabilities	(185,602)	(171,905)
Net contract liabilities	(90,523)	(79,273)
Disaggregation of Revenue [Line Items]
Contract assets	95,079	92,632
Contract Retentions
Revenue from Contract with Customer [Abstract]
Contract assets	7,400	12,300
Disaggregation of Revenue [Line Items]
Contract assets	$ 7,400	$ 12,300

Revenue and Contract Balances_3

Revenue and Contract Balances - Narrative (Details) - USD ($) $ in Thousands	6 Months Ended
	Mar. 28, 2021	Mar. 29, 2020	Sep. 27, 2020
Disaggregation of Revenue [Line Items]
Contract liability revenue recognized during the period	$ 90,000	$ 105,000
Net favorable (unfavorable) operating income adjustments	1,100	$ (2,800)
Liabilities for anticipated losses	9,500		$ 13,200
Estimated cost to complete the related contracts	$ 95,000		118,000
Period for billing and collecting unbilled receivables	12 months
Unbilled accounts receivable related to claims and requests for equitable adjustment on contracts	$ 11,000		$ 11,000
Remaining unsatisfied performance obligation	$ 3,127,848
Remaining performance obligation, termination notice period one	30 days
Remaining performance obligation, termination notice period two	60 days
Remaining performance obligation, termination notice period three	90 days
CIG
Disaggregation of Revenue [Line Items]
Increase in revenue due to change in contract value	$ 2,800

Revenue and Contract Balances_4

Revenue and Contract Balances - Accounts Receivable, Net (Details) - USD ($) $ in Thousands	Mar. 28, 2021	Sep. 27, 2020
Revenue from Contract with Customer [Abstract]
Billed	$ 380,522	$ 402,818
Unbilled	253,784	253,364
Total accounts receivable	634,306	656,182
Allowance for doubtful accounts	(5,120)	(7,147)
Total accounts receivable, net	$ 629,186	$ 649,035

Revenue and Contract Balances_5

Revenue and Contract Balances - Remaining Unsatisfied Performance Obligations (Details) $ in Thousands	Mar. 28, 2021USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining unsatisfied performance obligation	$ 3,127,848
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-03-29
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining unsatisfied performance obligation	$ 1,828,946
Remaining unsatisfied performance obligation, expected timing of satisfaction	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-04-04
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining unsatisfied performance obligation	$ 1,298,902
Remaining unsatisfied performance obligation, expected timing of satisfaction

Acquisitions - Narrative (Detai

Acquisitions - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended
	Mar. 28, 2021	Sep. 27, 2020	Mar. 29, 2020	Mar. 28, 2021	Mar. 29, 2020
Business Acquisition [Line Items]
Contingent earn-out liability	$ 28,700			$ 28,700
Aggregate maximum of contingent consideration	66,900			66,900
Gain on fair value adjustment to contingent consideration	$ 230		$ 1,571	$ 193	$ 1,571
Minimum
Business Acquisition [Line Items]
Significant unobservable input, earn-out period				2 years
Minimum | Existing customer contracts
Business Acquisition [Line Items]
Useful life of intangible assets				1 year
Minimum | Trade names
Business Acquisition [Line Items]
Useful life of intangible assets				3 years
Maximum
Business Acquisition [Line Items]
Significant unobservable input, earn-out period				3 years
Maximum | Existing customer contracts
Business Acquisition [Line Items]
Useful life of intangible assets				10 years
Maximum | Trade names
Business Acquisition [Line Items]
Useful life of intangible assets				5 years
SEG
Business Acquisition [Line Items]
Fair value of acquisition purchase price			40,900
Initial cash payments			29,600
Contingent earn-out liability			11,300		11,300
Aggregate maximum of contingent consideration			$ 20,000		$ 20,000
Earn-out period			3 years
BWF
Business Acquisition [Line Items]
Fair value of acquisition purchase price		$ 47,700
Initial cash payments		41,800
Contingent earn-out liability		5,200
Aggregate maximum of contingent consideration		$ 8,000
Earn-out period		3 years
Payables related to estimated post-closing adjustments		$ 700

Goodwill and Intangible Asset_2

Goodwill and Intangible Assets - Goodwill (Details) $ in Thousands	6 Months Ended
	Mar. 28, 2021USD ($)
Goodwill
Balance at beginning of the period	$ 993,498
Acquisition activity	3,675
Translation	32,400
Balance at end of the period	1,029,573
GSG
Goodwill
Balance at beginning of the period	516,315
Acquisition activity	0
Translation	7,874
Balance at end of the period	524,189
CIG
Goodwill
Balance at beginning of the period	477,183
Acquisition activity	3,675
Translation	24,526
Balance at end of the period	$ 505,384

Goodwill and Intangible Asset_3

Goodwill and Intangible Assets - Narrative (Details) - USD ($)	1 Months Ended	3 Months Ended			6 Months Ended		12 Months Ended
	Sep. 27, 2020	Mar. 28, 2021	Jun. 28, 2020	Mar. 29, 2020	Mar. 28, 2021	Mar. 29, 2020	Sep. 27, 2020	Jun. 29, 2020
Goodwill [Line Items]
Impairment of goodwill							$ 0
Carrying value	$ 2,378,558,000	$ 2,455,062,000			$ 2,455,062,000		2,378,558,000
Goodwill	993,498,000	1,029,573,000			1,029,573,000		993,498,000
Amortization expense		2,200,000		$ 3,400,000	5,600,000	$ 6,400,000
Australia
Goodwill [Line Items]
Percentage negative growth			7.00%
All reporting units excluding ASP
Goodwill [Line Items]
Percentage of excess of fair value over carrying value								80.00%
ASP
Goodwill [Line Items]
Impairment of goodwill	15,800,000
Carrying value	144,900,000						144,900,000
Goodwill	95,500,000						95,500,000
GSG
Goodwill [Line Items]
Gross amounts of goodwill	534,000,000	541,900,000			541,900,000		534,000,000
Accumulated impairment	17,700,000	17,700,000			17,700,000		17,700,000
Goodwill	516,315,000	524,189,000			524,189,000		516,315,000
CIG
Goodwill [Line Items]
Gross amounts of goodwill	598,700,000	626,900,000			626,900,000		598,700,000
Accumulated impairment	121,500,000	121,500,000			121,500,000		121,500,000
Goodwill	$ 477,183,000	$ 505,384,000			$ 505,384,000		$ 477,183,000
CIG | ASP
Goodwill [Line Items]
Percentage of excess of fair value over carrying value								20.00%

Goodwill and Intangible Asset_4

Goodwill and Intangible Assets - Gross Amount, Accumulated Amortization and Estimated Amortization (Details) - USD ($) $ in Thousands	6 Months Ended
	Mar. 28, 2021	Sep. 27, 2020
Finite-Lived Intangible Assets [Line Items]
Gross Amount	$ 85,229	$ 106,421
Accumulated Amortization	(76,306)	(92,478)
Estimated amortization expense
2021	3,547
2022	2,814
2023	1,972
2024	590
Total	$ 8,923	13,943
Client relations
Finite-Lived Intangible Assets [Line Items]
Weighted- Average Remaining Life (in Years)	2 years 7 months 6 days
Gross Amount	$ 47,515	60,775
Accumulated Amortization	$ (41,533)	(53,392)
Backlog
Finite-Lived Intangible Assets [Line Items]
Weighted- Average Remaining Life (in Years)	6 months
Gross Amount	$ 30,509	37,682
Accumulated Amortization	$ (28,778)	(32,761)
Trade names
Finite-Lived Intangible Assets [Line Items]
Weighted- Average Remaining Life (in Years)	1 year 8 months 12 days
Gross Amount	$ 7,205	7,964
Accumulated Amortization	$ (5,995)	$ (6,325)

Property and Equipment (Details

Property and Equipment (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 28, 2021	Mar. 29, 2020	Mar. 28, 2021	Mar. 29, 2020	Sep. 27, 2020
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 134,130		$ 134,130		$ 125,511
Accumulated depreciation	(96,707)		(96,707)		(90,004)
Property and equipment, net	37,423		37,423		35,507
Depreciation expense related to property and equipment	3,100	$ 3,100	5,900	$ 6,400
Equipment, furniture and fixtures
Property, Plant and Equipment [Line Items]
Property and equipment, gross	98,135		98,135		90,942
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 35,995		$ 35,995		$ 34,569

Stock Repurchase and Dividend_2

Stock Repurchase and Dividends - Narrative (Details) - USD ($)

May 28, 2021

Apr. 26, 2021

Feb. 26, 2021

Dec. 11, 2020

Feb. 28, 2020

Dec. 13, 2019

Mar. 28, 2021

Mar. 29, 2020

Mar. 28, 2021

Mar. 29, 2020

Sep. 27, 2020

Jan. 27, 2020

Stock Repurchase And Dividends [Abstract]

Maximum repurchase amount under stock repurchase program

$ 200,000,000

Remaining authorized amount under share repurchase program

$ 177,800,000

$ 177,800,000

$ 207,800,000

Shares repurchased (in shares)

249,714

Average price (in dollars per share)

$ 120.14

Total cost

$ 30,000,000

Subsequent Event [Line Items]

Dividend paid per share (in dollars per share)

$ 0.17

$ 0.17

$ 0.15

$ 0.15

$ 0.17

$ 0.15

$ 0.34

$ 0.30

Subsequent Event

Subsequent Event [Line Items]

Quarterly cash dividend declared (in dollars per share)

$ 0.20

Forecast | Subsequent Event

Subsequent Event [Line Items]

Dividend paid per share (in dollars per share)

$ 0.20

Stock Repurchase and Dividend_3

Stock Repurchase and Dividends - Schedule of Dividends Declared and Paid (Details) - USD ($) $ / shares in Units, $ in Thousands	Feb. 26, 2021	Dec. 11, 2020	Feb. 28, 2020	Dec. 13, 2019	Mar. 28, 2021	Mar. 29, 2020	Mar. 28, 2021	Mar. 29, 2020
Stock Repurchase And Dividends [Abstract]
Dividend paid per share (in dollars per share)	$ 0.17	$ 0.17	$ 0.15	$ 0.15	$ 0.17	$ 0.15	$ 0.34	$ 0.30
Dividend Paid	$ 9,212	$ 9,198	$ 8,224	$ 8,190			$ 18,410	$ 16,414

Leases - Narrative (Details)

Leases - Narrative (Details)	Mar. 28, 2021
Lessee, Lease, Description [Line Items]
Renewal term (up to)	5 years
Minimum
Lessee, Lease, Description [Line Items]
Remaining lease term	1 month
Maximum
Lessee, Lease, Description [Line Items]
Remaining lease term	12 years

Leases - Components of Lease Co

Leases - Components of Lease Costs (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 28, 2021	Mar. 29, 2020	Mar. 28, 2021	Mar. 29, 2020
Leases [Abstract]
Operating lease cost	$ 22,640	$ 21,595	$ 44,709	$ 42,767
Sublease income	(30)	(541)	(59)	(1,115)
Other	0	18	0	36
Total lease cost	$ 22,610	$ 21,072	$ 44,650	$ 41,688

Leases - Supplemental Cash Flow

Leases - Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 28, 2021	Mar. 29, 2020	Mar. 28, 2021	Mar. 29, 2020
Leases [Abstract]
Operating cash flows for operating leases	$ 17,599	$ 21,789	$ 36,399	$ 41,504
Right-of-use assets obtained in exchange for new operating lease liabilities	$ 23,429	$ 59,671	$ 33,722	$ 321,919

Leases - Supplemental Balance S

Leases - Supplemental Balance Sheet and Other Information (Details) - USD ($) $ in Thousands	Mar. 28, 2021	Sep. 27, 2020
Operating leases:
Right-of-use assets	$ 222,922	$ 239,396
Lease liabilities:
Current	68,941	69,650
Long-term	179,645	191,955
Total operating lease liabilities	$ 248,586	$ 261,605
Weighted-average remaining lease term:
Operating leases	5 years	5 years
Weighted-average discount rate:
Operating leases	2.40%	2.50%

Leases - Maturity Analysis of t

Leases - Maturity Analysis of the Future Undiscounted Cash Flows of Operating and Finance Lease Liabilities (Details) - USD ($) $ in Thousands	Mar. 28, 2021	Sep. 27, 2020
Leases [Abstract]
2021	$ 39,951
2022/2021	70,500	$ 75,074
2023/2022	48,703	64,972
2024/2023	33,627	44,733
2025/2024	24,030	30,991
2025		21,466
Beyond	49,021
Beyond		44,169
Total lease payments	265,832	281,405
Less: imputed interest	(17,246)	(19,800)
Total present value of lease liabilities	$ 248,586	$ 261,605

Stockholders' Equity and Stoc_2

Stockholders' Equity and Stock Compensation Plans (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		6 Months Ended
	Mar. 28, 2021	Mar. 29, 2020	Mar. 28, 2021	Mar. 29, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	$ 5.7	$ 5	$ 10.6	$ 9.4
Performance-based restricted stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of shares that ultimately vest depending on growth in diluted earnings per share			50.00%
Percentage of shares that ultimately vest depending on the shareholder return relative to peer group of companies over vesting period			50.00%
Performance-based restricted stock | Non-employee directors and executive officers
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)			57,542
Granted, fair value (in dollars per share)			$ 153.03
Vesting period			3 years
Restricted stock units | Non-employee directors, executive officers and employees
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)			108,464
Granted, fair value (in dollars per share)			$ 121.17
Restricted stock units | Executive officers and employees
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period			4 years
Restricted stock units | Non-employee director
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period			1 year

Earnings per Share ("EPS") - Ca

Earnings per Share ("EPS") - Calculation (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 28, 2021	Mar. 29, 2020	Mar. 28, 2021	Mar. 29, 2020
Earnings Per Share [Abstract]
Net income attributable to Tetra Tech	$ 45,517	$ 36,397	$ 97,953	$ 83,707
Weighted-average common shares outstanding – basic (in shares)	54,187	54,699	54,085	54,541
Effect of dilutive stock options and unvested restricted stock (in shares)	549	764	630	839
Weighted-average common stock outstanding – diluted (in shares)	54,736	55,463	54,715	55,380
Earnings per share attributable to Tetra Tech:
Basic (in dollars per share)	$ 0.84	$ 0.67	$ 1.81	$ 1.53
Diluted (in dollars per share)	$ 0.83	$ 0.66	$ 1.79	$ 1.51

Income Taxes - Narrative (Detai

Income Taxes - Narrative (Details) - USD ($) $ in Millions	6 Months Ended
	Mar. 28, 2021	Mar. 29, 2020	Sep. 27, 2020
Income Tax Disclosure [Abstract]
Effective tax rate	19.20%	19.50%
Reduction in income tax expense due to excess tax benefits on share-based payments	$ 8	$ 6.7
Effective tax rate, excluding excess tax benefits on share-based payments	25.80%	25.90%
Liability for uncertain tax positions	$ 10		$ 9.7

Reportable Segments - Financial

Reportable Segments - Financial Information (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 28, 2021USD ($)	Mar. 29, 2020USD ($)	Mar. 28, 2021USD ($)segment	Mar. 29, 2020USD ($)	Sep. 27, 2020USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments | segment			2
Revenue	$ 754,764	$ 734,133	$ 1,519,868	$ 1,531,756
Income from operations	60,807	47,530	127,059	110,832
Total Assets	2,455,062		2,455,062		$ 2,378,558
Operating segments | GSG
Segment Reporting Information [Line Items]
Revenue	473,829	436,903	942,451	894,307
Income from operations	46,109	35,347	93,809	77,395
Total Assets	635,217		635,217		649,417
Operating segments | CIG
Segment Reporting Information [Line Items]
Revenue	293,128	308,412	604,152	659,576
Income from operations	26,311	21,676	55,869	53,309
Total Assets	463,176		463,176		479,238
Operating segments | RCM
Segment Reporting Information [Line Items]
Revenue	470	5	470	150
Income from operations	1	(1)	1	1
Total Assets	11,369		11,369		14,258
Elimination of inter-segment revenue
Segment Reporting Information [Line Items]
Revenue	(12,663)	(11,187)	(27,205)	(22,277)
Corporate
Segment Reporting Information [Line Items]
Income from operations	(11,614)	$ (9,492)	(22,620)	$ (19,873)
Total Assets	$ 1,345,300		$ 1,345,300		$ 1,235,645

Fair Value Measurements (Detail

Fair Value Measurements (Details) $ in Millions	Mar. 28, 2021USD ($)
Amended Credit Agreement
Debt Instrument [Line Items]
Amount outstanding under credit facility	$ 250.8

Derivative Financial Instrume_2

Derivative Financial Instruments - Narrative (Details) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Mar. 28, 2021USD ($)	Mar. 29, 2020USD ($)	Mar. 28, 2021USD ($)	Mar. 29, 2020USD ($)	Sep. 30, 2018agreement	Sep. 27, 2020USD ($)
Derivative [Line Items]
Gains (losses) on cash flow hedges recognized in comprehensive income	$ 1,890	$ (7,365)	$ 3,366	$ (5,695)
Interest Rate Swap | Designated as cash flow hedges | Derivatives designated as hedging instruments
Derivative [Line Items]
Number of derivative agreements | agreement					5
Notional amount	$ 221,900		$ 221,900
Fixed rate	2.79%		2.79%
Loss to be reclassified during next twelve months	$ 5,700		$ 5,700
Interest Rate Swap | Designated as cash flow hedges | Derivatives designated as hedging instruments | Other current liabilities
Derivative [Line Items]
Fair value of interest rate swap agreements	(12,100)		(12,100)			$ (15,500)
Interest Rate Swap 1 | Designated as cash flow hedges | Derivatives designated as hedging instruments
Derivative [Line Items]
Notional amount	44,400		44,400
Interest Rate Swap 2 | Designated as cash flow hedges | Derivatives designated as hedging instruments
Derivative [Line Items]
Notional amount	44,400		44,400
Interest Rate Swap 3 | Designated as cash flow hedges | Derivatives designated as hedging instruments
Derivative [Line Items]
Notional amount	44,400		44,400
Interest Rate Swap 4 | Designated as cash flow hedges | Derivatives designated as hedging instruments
Derivative [Line Items]
Notional amount	44,400		44,400
Interest Rate Swap 5 | Designated as cash flow hedges | Derivatives designated as hedging instruments
Derivative [Line Items]
Notional amount	$ 44,400		$ 44,400

Reclassifications Out of Accu_3

Reclassifications Out of Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 28, 2021	Mar. 29, 2020	Mar. 28, 2021	Mar. 29, 2020
Reclassifications out of accumulated other comprehensive loss
Beginning balance	$ 1,105,254	$ 1,026,765	$ 1,037,373	$ 989,464
Amounts reclassified from accumulated other comprehensive loss
Other comprehensive income (loss), net of tax	12,865	(54,380)	46,734	(38,809)
Ending balance	1,147,228	950,238	1,147,228	950,238
Accumulated Other Comprehensive Income (Loss)
Reclassifications out of accumulated other comprehensive loss
Beginning balance	(127,919)	(145,015)	(161,786)	(160,584)
Other comprehensive loss before reclassifications	14,355	(53,738)	49,724	(37,686)
Amounts reclassified from accumulated other comprehensive loss
Interest rate contracts, net of tax	(1,492)	(638)	(2,994)	(1,121)
Other comprehensive income (loss), net of tax	12,863	(54,376)	46,730	(38,807)
Ending balance	(115,056)	(199,391)	(115,056)	(199,391)
Foreign Currency Translation Adjustments
Reclassifications out of accumulated other comprehensive loss
Beginning balance	(113,884)	(135,812)	(146,275)	(149,711)
Other comprehensive loss before reclassifications	10,973	(47,011)	43,364	(33,112)
Amounts reclassified from accumulated other comprehensive loss
Other comprehensive income (loss), net of tax	10,973	(47,011)	43,364	(33,112)
Ending balance	(102,911)	(182,823)	(102,911)	(182,823)
Gain (Loss) on Derivative Instruments
Reclassifications out of accumulated other comprehensive loss
Beginning balance				(10,873)
Gain (Loss) on Derivative Instruments
Reclassifications out of accumulated other comprehensive loss
Beginning balance	(14,035)	(9,203)	(15,511)
Other comprehensive loss before reclassifications	3,382	(6,727)	6,360	(4,574)
Amounts reclassified from accumulated other comprehensive loss
Interest rate contracts, net of tax	(1,492)	(638)	(2,994)	(1,121)
Other comprehensive income (loss), net of tax	1,890	(7,365)	3,366	(5,695)
Ending balance	$ (12,145)	$ (16,568)	$ (12,145)	$ (16,568)

Commitments and Contingencies (

Commitments and Contingencies (Details)	Jul. 15, 2019action
Commitments and Contingencies Disclosure [Abstract]
Number of qui tam actions	3

Related Party Transactions (Det

Related Party Transactions (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 28, 2021	Mar. 29, 2020	Mar. 28, 2021	Mar. 29, 2020	Sep. 27, 2020
Related Party Transactions [Abstract]
Related party revenues	$ 24,000	$ 19,000	$ 46,000	$ 48,000
Accounts receivable, net	20,789		20,789		$ 20,884
Contract assets	4,641		4,641		3,261
Contract liabilities	$ 2,486		$ 2,486		$ 478

Uncategorized Items - ttek-2021

Label	Element	Value
Restricted Cash	us-gaap_RestrictedCash	$ 0
Restricted Cash	us-gaap_RestrictedCash	$ 154,000