TRC Companies 10-Q 6 May 15 2015 Q3 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	9 Months Ended
	Mar. 27, 2015	Mar. 30, 2015
Document and Entity Information [Abstract]
Entity Registrant Name	TRC COMPANIES INC /DE/
Entity Central Index Key	103096
Current Fiscal Year End Date	-24
Entity Filer Category	Accelerated Filer
Document Type	10-Q
Document Period End Date	27-Mar-15
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	Q3
Amendment Flag	FALSE
Entity Common Stock, Shares Outstanding		30,432,977

CONDENSED_CONSOLIDATED_STATEME

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (USD $)	3 Months Ended		9 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Mar. 27, 2015	Mar. 28, 2014	Mar. 27, 2015	Mar. 28, 2014
Gross revenue	$130,777	$120,836	$397,030	$350,002
Less subcontractor costs and other direct reimbursable charges	29,783	32,755	103,579	89,538
Net service revenue	100,994	88,081	293,451	260,464
Interest income from contractual arrangements	23	73	67	26
Insurance recoverables and other income	753	5,008	6,238	17,613
Operating costs and expenses:
Cost of services (exclusive of costs shown separately below)	83,486	80,127	247,275	234,914
General and administrative expenses	8,927	8,363	25,360	24,642
Depreciation and amortization	2,208	2,161	7,114	6,587
Total operating costs and expenses	94,621	90,651	279,749	266,143
Operating income	7,149	2,511	20,007	11,960
Interest expense	-73	-22	-125	-152
Income from operations before taxes	7,076	2,489	19,882	11,808
Provision for income taxes	-1,916	-1,060	-7,244	-4,830
Net income	5,160	1,429	12,638	6,978
Net loss applicable to noncontrolling interest	5	2	14	36
Net income applicable to TRC Companies, Inc.	$5,165	$1,431	$12,652	$7,014
Basic earnings per common share (in dollars per share)	$0.17	$0.05	$0.42	$0.24
Diluted earnings per common share (in dollars per share)	$0.17	$0.05	$0.41	$0.23
Weighted-average common shares outstanding:
Basic (shares)	30,382	29,691	30,233	29,549
Diluted (shares)	30,737	30,166	30,551	30,088

CONDENSED_CONSOLIDATED_STATEME1

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Mar. 27, 2015	Mar. 28, 2014	Mar. 27, 2015	Mar. 28, 2014
Net income	$5,160	$1,429	$12,638	$6,978
Other comprehensive income (loss)
Unrealized gain on available-for-sale securities	15	19	8	162
Tax effect on unrealized gain on available-for-sale securities	-6	-9	-3	-66
Reclassification for loss (gain) included in net income	-2	-67	5	-98
Tax effect on realized loss (gain) on available-for-sale securities	1	28	-2	40
Total other comprehensive income (loss)	8	-29	8	38
Comprehensive income	5,168	1,400	12,646	7,016
Comprehensive loss attributable to noncontrolling interests	5	2	14	36
Comprehensive income attributable to TRC Companies, Inc.	$5,173	$1,402	$12,660	$7,052

CONDENSED_CONSOLIDATED_BALANCE

CONDENSED CONSOLIDATED BALANCE SHEETS (USD $)	Mar. 27, 2015	Jun. 30, 2014
In Thousands, unless otherwise specified
Current assets:
Cash and cash equivalents	$21,343	$27,597
Restricted cash	277	5,756
Accounts receivable, less allowance for doubtful accounts	131,666	116,937
Insurance recoverable - environmental remediation	42,647	42,062
Restricted investments	6,892	2,934
Deferred income tax assets	12,281	12,293
Income taxes refundable	2,266	1,021
Prepaid expenses and other current assets	12,354	12,441
Total current assets	229,726	221,041
Property and equipment	63,501	60,240
Less accumulated depreciation and amortization	-50,283	-47,190
Property and equipment, net	13,218	13,050
Goodwill	36,354	31,679
Long-term deferred income tax assets	3,046	4,267
Long-term restricted investments	19,729	23,537
Long-term prepaid insurance	26,505	28,521
Other assets	15,076	13,490
Total assets	343,654	335,585
Current liabilities:
Current portion of long-term debt	1,035	463
Current portion of capital lease obligations	261	562
Accounts payable	27,188	32,663
Accrued compensation and benefits	43,150	36,586
Deferred revenue	14,580	14,503
Environmental remediation liabilities	8,147	138
Other accrued liabilities	40,623	47,310
Total current liabilities	134,984	132,225
Non-current liabilities:
Long-term debt, net of current portion	60	105
Capital lease obligations, net of current portion	0	167
Income taxes payable and deferred income tax liabilities	1,481	1,539
Deferred revenue	66,538	70,398
Environmental remediation liabilities	527	6,268
Total liabilities	203,590	210,702
Commitments and contingencies
Equity:
Common stock, $.10 par value; 40,000,000 shares authorized, 30,436,459 and 30,432,977 shares issued and outstanding, respectively, at March 27, 2015, and 29,752,934 and 29,749,452 shares issued and outstanding, respectively, at June 30, 2014	3,044	2,975
Additional paid-in capital	190,214	187,748
Accumulated deficit	-52,702	-65,354
Accumulated other comprehensive loss	-69	-77
Treasury stock, at cost	-33	-33
Total stockholders' equity applicable to TRC Companies, Inc.	140,454	125,259
Noncontrolling interest	-390	-376
Total equity	140,064	124,883
Total liabilities and equity	$343,654	$335,585

CONDENSED_CONSOLIDATED_BALANCE1

CONDENSED CONSOLIDATED BALANCE SHEETS Parenthetical (USD $)	Mar. 27, 2015	Jun. 30, 2014
Stockholders' Equity:
Common stock, par value	$0.10	$0.10
Common stock, shares authorized	40,000,000	40,000,000
Common stock, shares issued	30,436,459	29,752,934
Common stock, shares outstanding	30,432,977	29,749,452

CONDENSED_CONSOLIDATED_STATEME2

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Mar. 27, 2015	Mar. 28, 2014
Cash flows from operating activities:
Net income	$12,638	$6,978
Non-cash items:
Depreciation and amortization	7,114	6,587
Stock-based compensation expense	3,746	3,513
Deferred income taxes	156	1,384
Other non-cash items	4	-1,127
Changes in operating assets and liabilities:
Accounts receivable	-9,582	-12,470
Insurance recoverable - environmental remediation	-585	-15,786
Income taxes	-1,291	-2,105
Restricted investments	-982	3,694
Prepaid expenses and other current assets	-1,913	19
Long-term prepaid insurance	2,016	2,262
Other assets	-107	518
Accounts payable	-5,456	-2,996
Accrued compensation and benefits	6,254	3,150
Deferred revenue	-3,783	-1,882
Environmental remediation liabilities	2,268	-799
Other accrued liabilities	2,083	12,237
Net cash provided by operating activities	12,580	3,177
Cash flows from investing activities:
Additions to property and equipment	-4,996	-3,757
Withdrawals from restricted investments	874	1,441
Acquisition of businesses, net of cash acquired	-11,214	-3,788
Earnout and net working capital payments on acquisitions	0	-252
Proceeds from sale of fixed assets	51	95
Investments in and advances to unconsolidated affiliates	0	17
Net cash used in investing activities	-15,285	-6,278
Cash flows from financing activities:
Payments on long-term debt and other	-4,634	-8,464
Payments on capital lease obligations	-468	-470
Proceeds from long-term debt and other	5,247	4,904
Net working capital and additional cash payments on acquisitions	-2,644	-872
Shares repurchased to settle tax withholding obligations	-1,628	-2,172
Excess tax benefit from stock-based awards	251	3,385
Proceeds on exchange of stock options	327	55
Net cash used in financing activities	-3,549	-3,634
Decrease in cash and cash equivalents	-6,254	-6,735
Cash and cash equivalents, beginning of period	27,597	18,136
Cash and cash equivalents, end of period	21,343	11,401
Supplemental cash flow information:
Non-cash consideration for assets acquired	$994	$1,903

CONDENSED_CONSOLIDATED_STATEME3

CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY (USD $)	Total	Parent [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Deficit [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Treasury Stock [Member]	Noncontrolling Interest [Member]
In Thousands, except Share data, unless otherwise specified
Beginning Balance at Jun. 30, 2013	$106,897	$107,232	$2,905	$181,874	($77,405)	($109)	($33)	$335
Shares issued, beginning of period at Jun. 30, 2013			29,053,000				3,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	6,978	7,014			7,014			-36
Other comprehensive income	38	38				38		0
Issuance of common stock (in shares)			4,000
Issuance of common stock	30	30	1	29
Issuance of common stock in connection with business acquisition (in shares)			34,000
Issuance of common stock in connection with business acquired	295	295	3	292
Exercise of stock options (in shares)			13,000
Exercise of stock options	55	55	1	54
Stock-based compensation (in shares)			898,000
Stock-based compensation	3,513	3,513	89	3,424
Shares repurchased to settle tax withholding obligations (in shares)			-293,000
Shares repurchased to settle tax withholding obligations	-2,191	-2,191	-29	-2,162
Directors' deferred compensation (in shares)			5,000
Directors' deferred compensation	34	34	1	33
Excess tax benefit from stock-based awards	3,385	3,385		3,385
Ending Balance at Mar. 28, 2014	119,034	119,405	2,971	186,929	-70,391	-71	-33	371
Shares issued, end of period at Mar. 28, 2014			29,714,000				3,000
Beginning Balance at Jun. 30, 2014	124,883	125,259	2,975	187,748	-65,354	-77	-33	376
Shares issued, beginning of period at Jun. 30, 2014			29,753,000				3,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	12,638	12,652			12,652			-14
Other comprehensive income	8	8				8		0
Issuance of common stock in connection with business acquisition (in shares)			50,000
Issuance of common stock in connection with business acquired	323	323	5	318
Exercise of stock options (in shares)	61,000		61,000
Exercise of stock options	327	327	6	321
Stock-based compensation (in shares)			862,000
Stock-based compensation	3,746	3,746	86	3,660
Shares repurchased to settle tax withholding obligations (in shares)			-295,000
Shares repurchased to settle tax withholding obligations	-1,632	-1,632	-29	-1,603
Directors' deferred compensation (in shares)			5,000
Directors' deferred compensation	38	38	1	37
Excess tax benefit from stock-based awards	-267	-267		-267
Ending Balance at Mar. 27, 2015	$140,064	$140,454	$3,044	$190,214	($52,702)	($69)	($33)	$390
Shares issued, end of period at Mar. 27, 2015			30,436,000				3,000

Company_Background_and_Basis_o

Company Background and Basis of Presentation	9 Months Ended
	Mar. 27, 2015
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Company Background and Basis of Presentation	Company Background and Basis of Presentation
	TRC Companies, Inc., through its subsidiaries (collectively, the "Company"), provides integrated engineering, consulting, and construction management services. Its project teams help its commercial and governmental clients implement environmental, energy and infrastructure projects from initial concept to delivery and operation. The Company provides its services almost entirely in the United States of America.
	The unaudited condensed consolidated financial statements have been prepared pursuant to the rules and regulations of the Securities and Exchange Commission ("SEC"). Certain information and footnote disclosures normally included in annual financial statements prepared in accordance with accounting principles generally accepted in the United States of America ("U.S. GAAP") have been omitted pursuant to those rules and regulations, but the Company's management believes that the disclosures included herein are adequate to make the information presented not misleading. The condensed consolidated financial statements include the accounts of the Company and all of its subsidiaries in which a controlling interest is maintained, as well as variable interest entities in which the Company is considered the primary beneficiary. These condensed consolidated financial statements should be read in conjunction with the consolidated financial statements and notes thereto included in the Company's Annual Report on Form 10-K for the fiscal year ended June 30, 2014.

New_Accounting_Pronouncements

New Accounting Pronouncements	9 Months Ended
	Mar. 27, 2015
Accounting Policies [Abstract]
New Accounting Pronouncements	New Accounting Pronouncements
	In August 2014, the Financial Accounting Standards Board ("FASB") issued an accounting standards update related to an entity’s ability to continue as a going concern. The new standard requires management to perform interim and annual assessments of an entity’s ability to continue as a going concern within one year of the date the financial statements are issued and provides guidance on determining when and how to disclose going concern uncertainties in the financial statements. Certain disclosures will be required if conditions give rise to substantial doubt about an entity’s ability to continue as a going concern. The new standard applies to all entities and is effective for annual and interim reporting periods ending after December 15, 2016, with early adoption permitted. This guidance will be effective for the Company in fiscal year 2017. The Company does not expect that the adoption of this standard will have a material effect on its financial statements.
	In June 2014, the FASB issued an accounting standards update related to stock compensation. The new standard requires that a performance target that affects vesting, and that could be achieved after the requisite service period, be treated as a performance condition. As such, the performance target should not be reflected in estimating the grant date fair value of the award. This update further clarifies that compensation cost should be recognized in the period in which it becomes probable that the performance target will be achieved and should represent the compensation cost attributable to the periods for which the requisite service has already been rendered. The new standard is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2015 and can be applied either prospectively or retrospectively to all awards outstanding as of the beginning of the earliest annual period presented as an adjustment to opening retained earnings. Early adoption is permitted. This guidance is applicable to the Company's fiscal year beginning July 1, 2016. The Company is currently evaluating the impact of adopting this new accounting guidance on its condensed consolidated financial statements.
	In May 2014, the FASB issued an accounting standards update that will supersede virtually all existing revenue recognition guidance under U.S. GAAP. The standard provides companies with a single model for use in accounting for revenue arising from contracts with customers and supersedes current revenue recognition guidance, including industry-specific revenue guidance. In addition, there are disclosure requirements related to the nature, amount, timing, and uncertainty of revenue recognition. This guidance will be effective for annual reporting periods beginning after December 15, 2016, including interim reporting periods, and will be required to be applied retrospectively. Early application of the guidance is not permitted. This guidance is applicable to the Company's fiscal year beginning July 1, 2017. In April 2015, the FASB proposed a deferral of the effective date of the new revenue standard by one year, subject to the FASB's due process requirement. The Company is currently evaluating the impact of adopting this new accounting guidance on its condensed consolidated financial statements.
	In April 2014, the FASB issued an accounting standards update for the requirements of reporting discontinued operations. The update amends the definition of a discontinued operation by raising the threshold for a disposal to qualify as discontinued operations. The standard will also require entities to provide additional disclosures about discontinued operations as well as disposal transactions that do not meet the discontinued operations criteria. The pronouncement is effective prospectively for all disposals (except disposals classified as held for sale before the adoption date) or components initially classified as held for sale in periods beginning on or after December 15, 2014. The implementation of this standard did not have a material impact on the Company's condensed consolidated financial statements.

Fair_Value_Measurements

Fair Value Measurements	9 Months Ended
	Mar. 27, 2015
Fair Value Disclosures [Abstract]
Fair Value Measurements	Fair Value Measurements
	The Company's financial assets or liabilities are measured using inputs from the three levels of the fair value hierarchy. The classification of a financial asset or liability within the hierarchy is determined based on the lowest level input that is significant to the fair value measurement. The three levels are as follows:
	Level 1 Inputs - Unadjusted quoted prices in active markets that are accessible at the measurement date for identical, unrestricted assets or liabilities. Generally, this includes debt and equity securities and derivative contracts that are traded on an active exchange market (e.g. the New York Stock Exchange) as well as certain U.S. Treasury and U.S. Government and agency mortgage-backed securities that are highly liquid and are actively traded in over-the-counter markets.
	Level 2 Inputs - Quoted prices for similar assets or liabilities in active markets; quoted prices for identical or similar assets or liabilities in inactive markets; or valuations based on models where the significant inputs are observable (e.g., interest rates, yield curves, credit risks) or can be corroborated by observable market data.
	Level 3 Inputs - Valuations based on models where significant inputs are not observable. The unobservable inputs reflect the Company's own assumptions about the assumptions that market participants would use.
	The following tables present the level within the fair value hierarchy at which the Company's financial assets and certain liabilities were measured on a recurring basis as of March 27, 2015 and June 30, 2014:
	Assets and Liabilities Measured at Fair Value on a Recurring Basis as of March 27, 2015
		Level 1			Level 2		Level 3		Total
	Restricted investments:
	Mutual funds	$	101		$	—	$	—	$	101
	Certificates of deposit	—			207		—		207
	Municipal bonds	—			752		—		752
	Corporate bonds	—			231		—		231
	U.S. government obligations	—			117		—		117
	Money market accounts and cash deposits	4,785			—		—		4,785
	Total assets	$	4,886		$	1,307	$	—	$	6,193
	Contingent consideration	$	—		$	—	$	368	$	368
	Total liabilities	$	—		$	—	$	368	$	368
	Assets and Liabilities Measured at Fair Value on a Recurring Basis as of June 30, 2014
		Level 1			Level 2		Level 3		Total
	Restricted investments:
	Mutual funds	$	140		$	—	$	—	$	140
	Certificates of deposit	—			209		—		209
	Municipal bonds	—			740		—		740
	Corporate bonds	—			236		—		236
	Asset backed securities	—			130		—		130
	Money market accounts and cash deposits	2,650			—		—		2,650
	Total assets	$	2,790		$	1,315	$	—	$	4,105
	Contingent consideration	$	—		$	—	$	352	$	352
	Total liabilities	$	—		$	—	$	352	$	352
	A majority of the Company's investments are priced by pricing vendors and are generally Level 1 or Level 2 investments, as these vendors either provide a quoted market price in an active market or use observable input for their pricing without applying significant adjustments. Broker pricing is used mainly when a quoted price is not available, the investment is not priced by the pricing vendors, or when a broker price is more reflective of fair value in the market in which the investment trades. The Company's broker priced investments are classified as Level 2 investments because the broker prices the investment based on similar assets without applying significant adjustments. The Company's restricted investment financial assets as of March 27, 2015 and June 30, 2014 are included within current and long-term restricted investments on the condensed consolidated balance sheets.
	Reclassification adjustments for realized gains or losses from available for sale restricted investment securities out of accumulated other comprehensive income are included in the condensed consolidated statements of operations within the insurance recoverables and other income line item.
	The Company's contingent consideration liabilities, included in other accrued liabilities on the condensed consolidated balance sheets, are associated with the acquisitions made in fiscal year ending June 30, 2015. The liabilities are measured at fair value using a probability weighted average of the potential payment outcomes that would occur should certain contract metrics be reached. There is no market data available to use in valuing the contingent consideration; therefore, the Company developed its own assumptions related to the achievement of the metrics to evaluate the fair value of these liabilities. As such, the contingent consideration is classified within Level 3 as described below.
	Items classified as Level 3 within the valuation hierarchy, consisting of contingent consideration liabilities related to recent acquisitions, were valued based on various estimates, including probability of success, discount rates and amount of time until the conditions of the contingent payments are achieved. The table below presents a rollforward of the contingent consideration liabilities valued using Level 3 inputs:
	Contingent consideration balance at July 1, 2014	$	352
	Additions for fiscal year 2015 acquisitions	362
	Reduction of liability for payments made	(346		)
	Contingent consideration balance at March 27, 2015	$	368
	The Company's long-term debt is not measured at fair value in the condensed consolidated balance sheets. The fair value of debt is the estimated amount the Company would have to pay to transfer its debt, including any premium or discount attributable to the difference between the stated interest rate and market rate of interest at the balance sheet date. Fair values are based on valuations of similar debt at the balance sheet date and supported by observable market transactions when available: Level 2 of the fair value hierarchy.  At March 27, 2015 and June 30, 2014 the fair value of the Company's debt was not materially different than its carrying value.

StockBased_Compensation

Stock-Based Compensation	9 Months Ended
	Mar. 27, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock-Based Compensation	Stock-Based Compensation
	The Company has two plans under which outstanding stock-based awards have been issued: the TRC Companies, Inc. Restated Stock Option Plan (the "Restated Plan"), and the Amended and Restated 2007 Equity Incentive Plan (the "2007 Plan"), (collectively "the Plans"). The Company issues new shares or utilizes treasury shares, when available, to satisfy awards under the Plans. Awards are made by the Compensation Committee of the Board of Directors; however, the Compensation Committee has delegated to the Chief Executive Officer ("CEO") the authority to grant awards for up to 10 shares to employees subject to a limitation of 100 shares in any 12 month period.
	Stock-based awards under the Plans consist of stock options, restricted stock awards ("RSA's"), restricted stock units ("RSU's") and performance stock units ("PSU's"). As of March 27, 2015, 3,111 shares remained available for grants under the 2007 Plan.
	Stock-Based Compensation
	The Company measures stock-based compensation cost at the grant date based on the fair value of the award. The value of the portion of the award that is ultimately expected to vest is recognized as expense over the requisite service periods in the Company's condensed consolidated statements of operations. Stock-based compensation expense includes the estimated effects of forfeitures, and estimates of forfeitures will be adjusted over the requisite service period to the extent actual forfeitures differ, or are expected to differ, from such estimates. Changes in estimated forfeitures will be recognized in the period of change and will also impact the amount of expense to be recognized in future periods.
	During the three and nine months ended March 27, 2015 and March 28, 2014, the Company recognized stock-based compensation expense in cost of services ("COS") and general and administrative expenses within the condensed consolidated statements of operations as follows:
			Three Months Ended							Nine Months Ended
			March 27,				March 28,			March 27,		March 28,
			2015				2014			2015		2014
	Cost of services		$	670			$	515		$	1,799	$	1,603
	General and administrative expenses		700				600			1,947		1,910
		Total stock-based compensation expense	$	1,370			$	1,115		$	3,746	$	3,513
	The benefits associated with the tax deductions in excess of recognized compensation cost are required to be reported as financing activities in the condensed consolidated statements of cash flows. This reduces reported operating cash flows and increases reported financing cash flows. As a result, net financing cash flows included $251 and $3,385 for the nine months ended March 27, 2015 and March 28, 2014, respectively, from the benefits of tax deductions in excess of recognized compensation cost. The tax benefit of any resulting excess tax deduction increases the additional paid-in capital ("APIC") pool. Any resulting tax deficiency is deducted from the APIC pool.
	Stock Options
	The Company uses the Black-Scholes option pricing model for determining the estimated grant date fair value for stock options. The fair value is then amortized on a straight-line basis over the requisite service periods of the awards, which is generally the vesting period. Use of a valuation model requires management to make certain assumptions with respect to selected model inputs. The risk-free interest rate assumption is based upon observed interest rates appropriate for the expected life of the employee stock options. The average expected life is based on the contractual term of the option and expected employee exercise and historical post-vesting employment termination experience. The Company estimates the volatility of its stock using historical volatility in accordance with current accounting guidance. Management determined that historical volatility of TRC common stock is most reflective of market conditions and the best indicator of expected volatility. The dividend yield assumption is based on the Company's historical and expected dividend payouts. There were no stock options granted during the nine months ended March 27, 2015 and March 28, 2014.
	A summary of stock option activity for the nine months ended March 27, 2015 under the Plans is as follows:
									Weighted-
									Average
					Weighted-				Remaining
					Average				Contractual	Aggregate
					Exercise				Term	Intrinsic
		Options			Price				(in years)	Value
	Outstanding options as of June 30, 2014 (649 exercisable)	654			$	9.62
	Options exercised	(61	)		$	5.39
	Options expired	(268	)		$	11.09
	Outstanding options as of March 27, 2015	325			$	9.19			1	$	320
	Options exercisable as of March 27, 2015	323			$	9.21			1	$	314
	Options vested and expected to vest as of March 27, 2015	325			$	9.19			1	$	320
	The aggregate intrinsic value is measured using the fair market value at the date of exercise (for options exercised) or as of March 27, 2015 (for outstanding options), less the applicable exercise price. The closing price of the Company's common stock on the New York Stock Exchange was $8.27 as of March 27, 2015. The total intrinsic value of options exercised for the nine months ended March 27, 2015 and March 28, 2014 was $134 and $33, respectively. The total proceeds received from option exercises for the nine months ended March 27, 2015 and March 28, 2014 was $327 and $55, respectively.
	As of March 27, 2015, there was $4 of total unrecognized compensation expense related to unvested stock option grants under the Plans, and this expense is expected to be recognized over a weighted-average period of 1.0 years.
	Restricted Stock Awards
	Compensation expense for RSA's is recognized ratably over the vesting term, which is generally four years. The fair value of the RSA's is determined based on the closing market price of the Company's common stock on the grant date. There were 6 non-vested RSA's as of March 27, 2015. There were no RSA's granted during the nine months ended March 27, 2015. As of March 27, 2015, there was $25 of total unrecognized compensation expense related to unvested RSA's under the Plans, and this expense is expected to be recognized over a weighted-average period of 1.4 years.
	Restricted Stock Units
	Compensation expense for RSU's is recognized ratably over the vesting term, which is generally four years. The fair value of RSU's is determined based on the closing market price of the Company's common stock on the grant date.
	A summary of non-vested RSU activity for the nine months ended March 27, 2015 is as follows:
					Weighted-
		Restricted			Average
		Stock			Grant Date
		Units			Fair Value
	Non-vested units as of June 30, 2014	1,007			$	6.06
	Units granted	403			$	6.9
	Units vested	(489	)		$	5.24
	Units forfeited	(6	)		$	6.89
	Non-vested units as of March 27, 2015	915			$	6.87
	RSU grants totaled 26 and 403 shares with a total weighted-average grant date fair value of $203 and $2,781 during the three and nine months ended March 27, 2015, respectively. RSU grants totaled 14 and 336 shares with a total weighted-average grant date fair value of $93 and $2,622 during the three and nine months ended March 28, 2014, respectively. The total fair value of RSU's vested during the three and nine months ended March 27, 2015 was $202 and $2,797, respectively. The total fair value of RSU's vested during the three and nine months ended March 28, 2014 was $128 and $4,407, respectively.
	As of March 27, 2015, there was $4,887 of total unrecognized compensation expense related to unvested RSU's under the Plans, and this expense is expected to be recognized over a weighted-average period of 2.6 years.
	Performance Stock Units
	Compensation expense for PSU's is recognized ratably over the vesting term, which is generally four years, if and when the Company concludes that it is probable that the performance condition will be achieved. The Company reassesses the probability of vesting at each reporting period for awards with performance conditions and adjusts compensation expense based on its probability assessment. The fair value of the PSU's is determined based on the closing market price of the Company's common stock on the grant date.
	The number of PSU's earned is determined based on the Company's performance against predefined targets. The range of payout is zero to 150% of the number of granted PSU's. The number of PSU's earned is determined based on actual performance at the end of the performance period. PSU grants totaled 464 shares with a total weighted-average grant date fair value of $2,986 during the nine months ended March 27, 2015. These PSU's will vest over four years upon meeting certain financial targets for the fiscal year ending June 30, 2015. PSU grants totaled 355 shares with a total weighted-average grant date fair value of $2,827 during the nine months ended March 28, 2014. The total fair value of PSU's vested during the nine months ended March 27, 2015, was $1,977. The total fair value of PSU's vested during the nine months ended March 28, 2014, was $2,234.
	At March 27, 2015, there was $6,496 of total unrecognized compensation expense related to non-vested PSU's; this expense is expected to be recognized over a weighted-average period of 1.9 years.
	A summary of non-vested PSU activity for the nine months ended March 27, 2015 is as follows:
										Weighted-
		PSU						Total		Average
		Original			PSU			PSU		Grant Date
		Awards			Adjustments (1)			Awards		Fair Value
	Non-vested units as of June 30, 2014	879			—			879		$	6.5
	Units granted	433			31			464		$	6.9
	Units vested	(337	)		(31	)		(368	)	$	5.14
	Units forfeited	(34	)		—			(34	)	$	7.41
	Non-vested units as of March 27, 2015	941			—			941		$	7.1
	-1	Represents the additional number of PSU's issued based on the final performance condition achieved at the end of the respective performance period.

Earnings_per_Share

Earnings per Share	9 Months Ended
	Mar. 27, 2015
Earnings Per Share [Abstract]
Earnings per Share	Earnings per Share
	Basic earnings per share ("EPS") is computed based on the weighted-average number of shares of common stock outstanding during the period. Diluted EPS is computed using the treasury stock method for stock options, warrants, non-vested restricted stock awards and units, and non-vested performance stock units. The treasury stock method assumes conversion of all potentially dilutive shares of common stock with the proceeds from assumed exercises used to hypothetically repurchase stock at the average market price for the period. Diluted EPS is computed by dividing net income applicable to the Company by the weighted-average common shares and potentially dilutive common shares that were outstanding during the period.
	The following table sets forth the computations of basic and diluted EPS for the three and nine months ended March 27, 2015 and March 28, 2014:
		Three Months Ended				Nine Months Ended
		March 27,		March 28,		March 27,		March 28,
		2015		2014		2015		2014
	Net income applicable to TRC Companies, Inc.	$	5,165	$	1,431	$	12,652	$	7,014
	Basic weighted-average common shares outstanding	30,382		29,691		30,233		29,549
	Effect of dilutive stock options, RSA's, RSU's and PSU's	355		475		318		539
	Diluted weighted-average common shares outstanding	30,737		30,166		30,551		30,088
	Earnings per common share applicable to TRC Companies, Inc.
	Basic earnings per common share	$	0.17	$	0.05	$	0.42	$	0.24
	Diluted earnings per common share	$	0.17	$	0.05	$	0.41	$	0.23
	Anti-dilutive stock options, RSA's, RSU's and PSU's, excluded from the calculation	1,832		2,153		1,868		2,088

Accounts_Receivable

Accounts Receivable	9 Months Ended
	Mar. 27, 2015
Receivables [Abstract]
Accounts Receivable	Accounts Receivable
	The current portion of accounts receivable as of March 27, 2015 and June 30, 2014, were comprised of the following:
			March 27,			June 30,
			2015			2014
	Billed		$	83,930		$	69,730
	Unbilled		51,760			50,743
	Retainage		4,394			5,184
		Total accounts receivable - gross	140,084			125,657
	Less allowance for doubtful accounts		(8,418		)	(8,720		)
		Total accounts receivable, less allowance for doubtful accounts	$	131,666		$	116,937

Other_Accrued_Liabilities

Other Accrued Liabilities	9 Months Ended
	Mar. 27, 2015
Accounts Payable and Accrued Liabilities, Current [Abstract]
Other Accrued Liabilities	Other Accrued Liabilities
	As of March 27, 2015 and June 30, 2014, other accrued liabilities were comprised of the following:
			March 27,		June 30,
			2015		2014
	Contract costs		$	28,266	$	26,289
	Legal accruals		3,761		5,903
	Lease obligations		3,741		3,420
	Other		4,855		11,698
		Total other accrued liabilities	$	40,623	$	47,310

Goodwill_and_Other_Intangible_

Goodwill and Other Intangible Assets	9 Months Ended
	Mar. 27, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Other Intangible Assets	Goodwill and Other Intangible Assets
	Goodwill
	As of March 27, 2015, the Company had $36,354 of goodwill, and the Company does not believe there were any events or changes in circumstances since the last goodwill assessment on April 25, 2014 that would indicate the fair value of goodwill was more likely than not reduced to below its carrying value. Accordingly, goodwill was not tested for impairment during the current fiscal quarter.
	On September 29, 2014, the Company acquired all of the outstanding stock of NOVA Training Inc. and all of the outstanding membership interests of NOVA Earthworks, LLC (collectively "NOVA") based in Midland, Texas. NOVA provides safety training and environmental services as well as oil spill response, remediation and general oil field construction services to customers in the oil and gas industry. The initial purchase price consisted of (i) a cash payment of $7,198 payable at closing, (ii) a second cash payment of $2,600 placed into escrow, of which $508 was payable in six months and the remaining $2,092 is due in 18 months subject to withholding for various contractual issues, (iii) 50 shares of the Company's common stock valued at $323 on the closing date, and (iv) a $560 net working capital adjustment. The sellers are also entitled to up to $1,500 in contingent cash consideration through an earn-out provision based on the NSR performance of the acquired firm over the 24 month period following closing. The Company estimated the fair value of the contingent earn-out liability to be $287 based on the projections and probabilities of reaching the performance goals through September 2016. Goodwill of $3,683, none of which is expected to be tax deductible, and other intangible assets of $3,622 were recorded as a result of this acquisition. The goodwill is primarily attributable to the synergies and ancillary growth opportunities expected to arise after the acquisition. The fair values of assets and liabilities of the NOVA acquisition have been recorded in the Environmental operating segment. The impact of this acquisition was not material to the Company's condensed consolidated balance sheets and results of operations.
	On July 1, 2014, the Company acquired all of the outstanding stock of Covino Environmental Associates, Inc. ("Covino"), based in Woburn, Massachusetts. Covino provides building sciences, industrial hygiene and related consulting services to private and public clients including major educational institutions. The initial purchase price of $1,994 consisted of cash of $1,500 payable at closing, a second cash payment of $309 payable on the one-year anniversary of the closing date subject to withholding for various contractual issues, and a $110 net working capital adjustment. The selling shareholder is also entitled to contingent cash consideration through an earn-out provision based on net service revenue ("NSR") performance of the acquired firm over the twelve month period following closing. The Company estimated the fair value of the contingent earn-out liability to be $75 based on the projections and probabilities of reaching the performance goals through July 2015. Goodwill of $992, none of which is expected to be tax deductible, and other intangible assets of $601 were recorded as a result of this acquisition. The goodwill is primarily attributable to the synergies and ancillary growth opportunities expected to arise after the acquisition. The fair values of assets and liabilities of the Covino acquisition have been recorded in the Environmental operating segment. The impact of this acquisition was not material to the Company's condensed consolidated balance sheets and results of operations.
	The changes in the carrying amount of goodwill for the nine months ended March 27, 2015 by operating segment are as follows:
			Gross										Gross
			Balance,			Accumulated			Balance,				Balance,			Accumulated			Balance,
			July 1,			Impairment			July 1,		Additions /		March 27,			Impairment			March 27,
	Operating Segment		2014			Losses			2014		Adjustments		2015			Losses			2015
	Energy		$	27,836		$	(14,506	)	$	13,330	$	—	$	27,836		$	(14,506	)	$	13,330
	Environmental		36,214			(17,865		)	18,349		$	4,675	40,889			(17,865		)	23,024
	Infrastructure		7,224			(7,224		)	—		$	—	7,224			(7,224		)	—
			$	71,274		$	(39,595	)	$	31,679	$	4,675	$	75,949		$	(39,595	)	$	36,354
	Other Intangible Assets
	Identifiable intangible assets as of March 27, 2015 and June 30, 2014 are included in other assets on the condensed consolidated balance sheets and were comprised of:
			March 27, 2015								June 30, 2014
			Gross						Net		Gross					Net
			Carrying			Accumulated			Carrying		Carrying		Accumulated			Carrying
	Identifiable intangible assets		Amount			Amortization			Amount		Amount		Amortization			Amount
	With determinable lives:
	Customer relationships		$	16,213		$	(6,871	)	$	9,342	$	12,125	$	(4,400	)	$	7,725
	Contract backlog		—			—			—		110		(83		)	27
			16,213			(6,871		)	9,342		12,235		(4,483		)	7,752
	With indefinite lives:
	Engineering licenses		426			—			426		426		—			426
			$	16,639		$	(6,871	)	$	9,768	$	12,661	$	(4,483	)	$	8,178
	Identifiable intangible assets with determinable lives are amortized over their estimated useful lives and are also reviewed for impairment if events or changes in circumstances indicate that their carrying amount may not be realizable.
	Identifiable intangible assets with determinable lives are being amortized over a weighted-average period of approximately 6 years. The weighted-average periods of amortization by intangible asset class is approximately 6 years for customer relationship assets and 4 months for contract backlog. The amortization of intangible assets for the three and nine months ended March 27, 2015 was $905 and $2,633, respectively. The amortization of intangible assets for the three and nine months ended March 28, 2014 was $755 and $2,127, respectively.
	Estimated amortization expense of intangible assets for the remainder of fiscal year 2015 and succeeding fiscal years is as follows:
	Fiscal Year			Amount
	2015			$	852
	2016			2,915
	2017			2,335
	2018			1,748
	2019			948
	2020 and Thereafter			544
		Total		$	9,342
	On an annual basis, or more frequently if events or changes in circumstances indicate that the asset might be impaired, the fair value of the indefinite-lived intangible assets is evaluated by the Company to determine if an impairment charge is required. The Company performed its most recent annual impairment review as of April 25, 2014. There were no events or changes in circumstances that would indicate the fair value of intangible assets was reduced to below its carrying value during the nine months ended March 27, 2015, and therefore intangible assets were not tested for impairment.

LongTerm_Debt_and_Capital_Leas

Long-Term Debt and Capital Lease Obligations	9 Months Ended
	Mar. 27, 2015
Debt Disclosure [Abstract]
Long-Term Debt and Capital Lease Obligations	Long-Term Debt and Capital Lease Obligations
	Revolving Credit Facility
	On April 16, 2013, the Company and substantially all of its subsidiaries (the "Borrower"), entered into a secured credit agreement (the "Credit Agreement") and related security documentation with Citizens Commercial Banking as lender, administrative agent, sole lead arranger, and sole book runner and JP Morgan Chase Bank, N.A. as lender and syndication agent. The Credit Agreement provides the Company with a $75,000 five-year secured revolving credit facility with a sublimit of $15,000 available for the issuance of letters of credit. Pursuant to the terms of the Credit Agreement, the Company may request an increase in the amount of the credit facility up to $95,000. The expiration date of the Credit Agreement is April 16, 2018.
	Amounts outstanding under the Credit Agreement bear interest at the Base Rate (as defined, generally the prime rate) plus a margin of 1.00% to 1.50% or at LIBOR plus a margin of 2.00% to 2.50%, based on the ratio (measured over a trailing four-quarter period) of consolidated total debt to earnings before interest, taxes, depreciation and amortization ("EBITDA"), as defined. The Company's obligations under the Credit Agreement are secured by a pledge of substantially all of its assets and guaranteed by its principal operating subsidiaries. The Credit Agreement also contains cross-default provisions which become effective if the Company defaults on other indebtedness.
	Under the Credit Agreement the Company is required to maintain a fixed charge coverage ratio of no less than 1.25 to 1.00 and to not permit its leverage ratio to exceed 2.00 to 1.00. The Credit Agreement also requires the Company to achieve minimum levels of Consolidated Adjusted EBITDA of $20,000 for the twelve-month periods ending June 30, 2015 and thereafter. The Company was in compliance with the financial covenants under the Credit Agreement as of March 27, 2015.
	As of March 27, 2015 and June 30, 2014, the Company had no borrowings outstanding under the Credit Agreement. Letters of credit outstanding were $2,648 and $3,148 as of March 27, 2015 and June 30, 2014, respectively. Based upon the leverage covenant, the maximum availability under the Credit Agreement was $75,000 and $68,536 as of March 27, 2015 and June 30, 2014, respectively. Funds available to borrow under the Credit Agreement, after consideration of the letters of credit outstanding and other indebtedness outstanding of $261 and $701, were $72,091 and $64,687 as of March 27, 2015 and June 30, 2014, respectively.
	Other Notes Payable
	In March 2012, the Company financed $2,195, of which $161 was being accounted for as a capital lease obligation, for a three-year software license agreement payable in twelve equal quarterly installments of approximately $190 each, including a finance charge of 2.74%. As of March 27, 2015, the balance outstanding under this agreement was $0.
	In July 2014, the Company financed $5,247 of insurance premiums payable in eleven equal monthly installments of approximately $482 each, including a finance charge of 1.99%. As of March 27, 2015, the balance outstanding under this agreement was $961.
	Capital Lease Obligations
	During fiscal years 2013 and 2012, the Company financed $1,160 and $756, respectively, of furniture, office equipment, and computer equipment under capital lease agreements expiring in fiscal years 2015 and 2016. The assets and liabilities under capital lease agreements are recorded at the lower of the present value of the minimum lease payments or the fair value of the asset. The assets are amortized over the shorter of their related lease terms or their estimated useful lives. Amortization of assets under capital leases is included in depreciation and amortization in the condensed consolidated statements of operations. The cost of assets under capital leases was $1,916, and accumulated amortization was $1,440 at March 27, 2015. The average interest rates on the capital leases is 2.55% and is imputed based on the lower of the Company's incremental borrowing rate at the inception of each lease or the implicit interest rate of the respective lease.

Variable_Interest_Entity

Variable Interest Entity	9 Months Ended
	Mar. 27, 2015
Variable Interest Entity [Abstract]
Variable Interest Entity	Variable Interest Entity
	The Company's condensed consolidated financial statements include the financial results of a variable interest entity in which it is the primary beneficiary. In determining whether the Company is the primary beneficiary of an entity, it considers a number of factors, including its ability to direct the activities that most significantly affect the entity's economic success, the Company's contractual rights and responsibilities under the arrangement and the significance of the arrangement to each party. These considerations impact the way the Company accounts for its existing collaborative and joint venture relationships and determines the consolidation of companies or entities with which the Company has collaborative or other arrangements.
	The Company consolidates the operations of Center Avenue Holdings ("CAH") a limited liability company, as it retains the contractual power to direct the activities of CAH which most significantly and directly impact its economic performance. The activity of CAH is not significant to the overall performance of the Company. The assets of CAH are restricted, from the standpoint of the Company, in that they are not available for the Company's general business use outside the context of CAH.
	The following table sets forth the assets and liabilities of CAH included in the condensed consolidated balance sheets of the Company:
		March 27,		June 30,
		2015		2014
	Current assets:
	Restricted investments	$	63	$	63
	Total current assets	63		63
	Other assets	4,344		4,344
	Total assets	$	4,407	$	4,407
	Current liabilities:
	Environmental remediation liabilities	$	2	$	7
	Total current liabilities	2		7
	Long-term environmental remediation liabilities	18		16
	Total liabilities	$	20	$	23
	The Company and the other member of CAH do not generally have an obligation to make additional capital contributions to CAH. However, through the end of the fiscal quarter ended March 27, 2015, the Company has provided approximately $4,023 of support it was not contractually obligated to provide. The additional support was primarily for debt service payments on a note payable. CAH repaid this loan balance in the amount of $2,448 in full on October 1, 2013. The Company intends to continue funding CAH's obligations as they become due.

Income_Taxes

Income Taxes	9 Months Ended
	Mar. 27, 2015
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes
	The Company's effective tax rate was approximately 27.1% and 42.6% for the three months ended March 27, 2015 and March 28, 2014, respectively. The primary reconciling items between the federal statutory rate of 35.0% and the Company's overall effective tax rate for the three months ended March 27, 2015 were the effect of state income taxes offset by discrete tax benefits related to the U.S. Research and Development credit. The discrete impact of research and development credits is the result of a change in estimate resulting from the finalization of a new research and development credit study during the three months ended March 27, 2015. A tax benefit for the change in estimate was reflected in its entirety in the three months ended March 27, 2015. For the three months ended March 28, 2014, the primary reconciling item between the federal statutory rate of 35.0% and the Company's overall effective tax rate was the effect of state income taxes.
	The Company's effective tax rate was approximately 36.4% and 40.8% for the nine months ended March 27, 2015 and March 28, 2014, respectively. The primary reconciling items between the federal statutory rate of 35.0% and the Company's overall effective tax rate were the effect of state income taxes offset by discrete tax benefits related to research and development tax credits for the nine months ended March 27, 2015, as well as the effect of state income taxes for the nine months ended March 28, 2014.
	As of March 27, 2015, the recorded liability for uncertain tax positions under the measurement criteria of Accounting Standards Codification ("ASC") Topic 740, Income Taxes, was $1,481. The Company does not expect the amount of unrecognized tax benefits to materially change within the next twelve months.
	As of March 27, 2015, the Company had a tax benefit of approximately $3,321 related to excess tax benefits from stock compensation. Pursuant to ASC Topic 718, a benefit of $251 was recorded to increase APIC as it reduced income taxes payable during the nine months ended March 27, 2015; in addition, a tax deficiency of $518 related to the expiration of vested stock options was recorded to decrease APIC as it reduced deferred tax assets.

Operating_Segments

Operating Segments	9 Months Ended
	Mar. 27, 2015
Segment Reporting [Abstract]
Operating Segments	Operating Segments
	The Company manages its business under the following three operating segments:
	Energy: The Energy operating segment provides services to a range of clients including energy companies, utilities, other commercial entities, and state and federal government agencies. The Company's Energy services include program management, engineer/procure/construct projects, design, and consulting. The Company's typical Energy projects involve upgrades, design and new construction for electric transmission and distribution systems and substations; energy efficiency program design and management; and renewable energy development and power generation.
	Environmental: The Environmental operating segment provides services to a range of clients including industrial, transportation, energy and natural resource companies, as well as federal, state and municipal agencies. The Environmental operating segment is organized to focus on key areas of demand including: environmental management of buildings and facilities; air quality measurements and modeling of potential air pollution impacts; water quality and water resource management; assessment and remediation of contaminated sites and buildings; hazardous waste management; construction monitoring, inspection and management; environmental, health and safety management and sustainability advisory services; compliance auditing and strategic due diligence; environmental licensing and permitting of a wide variety of projects; and natural and cultural resource assessment, protection and management.
	Infrastructure: The Infrastructure operating segment provides services related to the expansion of infrastructure capacity, the rehabilitation of overburdened and deteriorating infrastructure systems, and the management of risks related to security of public and private facilities. The Company's client base is predominantly state and municipal governments as well as select commercial developers. In addition, the Company provides infrastructure services on projects originating in its Energy and Environmental operating segments. Primary services include: roadway, bridge and related surface transportation design; structural design and inspection of bridges; program management; construction engineering inspection and construction management for roads and bridges; civil engineering for municipalities and public works departments; geotechnical engineering services; and security assessments, design and construction management.
	The Company's chief operating decision maker ("CODM") is its Chief Executive Officer ("CEO"). The Company's CEO manages the business by evaluating the financial results of the three operating segments focusing primarily on segment revenue and segment profit. The Company utilizes segment revenue and segment profit because it believes they provide useful information for effectively allocating resources among operating segments; evaluating the health of its operating segments based on metrics that management can actively influence; and gauging its investments and its ability to service, incur or pay down debt. Specifically, the Company's CEO evaluates segment revenue and segment profit and assesses the performance of each operating segment based on these measures, as well as, among other things, the prospects of each of the operating segments and how they fit into the Company's overall strategy. The Company's CEO then decides how resources should be allocated among its operating segments. The Company does not track its assets by operating segment, and consequently, it is not practical to show assets by operating segment. Segment profit includes all operating expenses except the following: costs associated with providing corporate shared services (including certain depreciation and amortization), goodwill and intangible asset write-offs, and stock-based compensation expense. Depreciation expense is primarily allocated to operating segments based upon their respective use of total operating segment office space. Assets solely used at the Corporate level are not allocated to the operating segments. Inter-segment balances and transactions are not material. The accounting policies of the operating segments are the same as those for the Company as a whole, except as discussed herein.
	The following tables present summarized financial information for the Company's operating segments (for the periods noted below):
			Energy			Environmental			Infrastructure			Total
	Three months ended March 27, 2015:
	Gross revenue		$	41,643		$	70,711		$	16,696		$	129,050
	Net service revenue		36,413			51,172			12,425			100,010
	Segment profit		8,676			9,942			2,806			21,424
	Depreciation and amortization		733			941			98			1,772
	Three months ended March 28, 2014:
	Gross revenue		$	44,480		$	60,750		$	14,223		$	119,453
	Net service revenue		34,632			41,939			10,403			86,974
	Segment profit		7,908			7,787			1,413			17,108
	Depreciation and amortization		835			633			106			1,574
			Energy			Environmental			Infrastructure			Total
	Nine months ended March 27, 2015:
	Gross revenue		$	122,124		$	219,960		$	53,142		$	395,226
	Net service revenue		104,789			151,383			36,978			293,150
	Segment profit		22,224			30,252			6,483			58,959
	Depreciation and amortization		2,376			2,764			329			5,469
	Nine months ended March 28, 2014:
	Gross revenue		$	118,050		$	182,692		$	46,692		$	347,434
	Net service revenue		98,339			124,860			34,430			257,629
	Segment profit		19,313			25,898			6,238			51,449
	Depreciation and amortization		2,385			2,039			318			4,742
			Three Months Ended						Nine Months Ended
	Gross revenue		March 27, 2015			March 28, 2014			March 27, 2015			March 28, 2014
	Gross revenue from reportable operating segments		$	129,050		$	119,453		$	395,226		$	347,434
	Reconciling items (1)		1,727			1,383			1,804			2,568
	Total consolidated gross revenue		$	130,777		$	120,836		$	397,030		$	350,002
	Net service revenue
	Net service revenue from reportable operating segments		$	100,010		$	86,974		$	293,150		$	257,629
	Reconciling items (1)		984			1,107			301			2,835
	Total consolidated net service revenue		$	100,994		$	88,081		$	293,451		$	260,464
	Income from operations before taxes
	Segment profit from reportable operating segments		$	21,424		$	17,108		$	58,959		$	51,449
	Corporate shared services (2)		(12,469		)	(12,895		)	(33,561		)	(34,131		)
	Stock-based compensation expense		(1,370		)	(1,115		)	(3,746		)	(3,513		)
	Unallocated depreciation and amortization		(436		)	(587		)	(1,645		)	(1,845		)
	Interest expense		(73		)	(22		)	(125		)	(152		)
	Total consolidated income from operations before taxes		$	7,076		$	2,489		$	19,882		$	11,808
	Depreciation and amortization
	Depreciation and amortization from reportable operating segments		$	1,772		$	1,574		$	5,469		$	4,742
	Unallocated depreciation and amortization		436			587			1,645			1,845
	Total consolidated depreciation and amortization		$	2,208		$	2,161		$	7,114		$	6,587
	-1	Amounts represent certain unallocated corporate amounts not considered in the CODM's evaluation of operating segment performance.
	-2	Corporate shared services consist of centrally managed functions in the following areas: accounting, treasury, information technology, legal, human resources, marketing, internal audit and executive management such as the CEO and various executives. These costs and other items of a general corporate nature are not allocated to the Company’s three operating segments.

Change_in_Estimate

Change in Estimate	9 Months Ended
	Mar. 27, 2015
Accounting Changes and Error Corrections [Abstract]
Change In Estimate	Change in Estimate
	In October 2013, the regulatory agency charged with oversight of one of the Company’s Exit Strategy projects issued a letter requiring the Company to evaluate modifications to its current site remedy. While it is premature to predict the outcome of this evaluation, the Company’s best estimate of the cost of such modifications is $12,439. As a result, the Company updated its estimate to complete for this project during the three months ended September 27, 2013. There were no significant changes to the estimate to complete during the three months ended March 28, 2014. This adjustment resulted in a reduction of gross revenue and NSR of $5,093 and a $7,346 charge to COS as a provision for future losses during the nine months ended March 28, 2014. Because these additional costs are expected to be covered by insurance, the Company also recorded an insurance recoverable of $12,439 during the nine months ended March 28, 2014. Therefore, this change in estimate had no impact on operating income or EPS.
	In February 2014, the regulatory agency charged with oversight of another of the Company’s Exit Strategy projects requested the addition of a significant alternative remedy with respect to a supplemental feasibility study. While the Company cannot predict which alternative will ultimately be chosen by the regulatory agency, the Company’s best estimate of the cost of such alternate remedy is $4,877. As a result, the Company updated its estimate to complete for this project during the three months ended March 28, 2014. This adjustment resulted in a reduction of gross revenue and NSR of $1,855 and a $3,022 charge to COS as a provision for future losses during the three and nine months ended March 28, 2014. Because these additional costs are expected to be covered by insurance, the Company also recorded an insurance recoverable of $4,877 during the three and nine months ended March 28, 2014. Therefore, this change in estimate had no impact on operating income or EPS.

Commitments_and_Contingencies

Commitments and Contingencies	9 Months Ended
	Mar. 27, 2015
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies
	Exit Strategy Contracts
	The Company has entered into a number of long-term contracts pursuant to its Exit Strategy program under which it is obligated to complete the remediation of environmental conditions at covered sites. The Company assumes the risk for remediation costs for pre-existing environmental conditions and believes that through in-depth technical analysis, comprehensive cost estimation and creative remedial approaches it is able to execute strategies which protect the Company's return on these projects. The Company's client pays a fixed price and, as additional protection, for a majority of the contracts the client also pays for a cleanup cost cap insurance policy. The policy, which includes the Company as a named or additional named insured party, provides coverage for cost increases from unknown or changed conditions up to a specified maximum amount significantly in excess of the estimated cost of remediation. The Company believes that it is adequately protected from risk on these projects and that it is not likely that it will incur material losses in excess of applicable insurance. However, because several projects are near or beyond the term or financial limits of the insurance, the Company believes it is reasonably possible that events could occur under certain circumstances which could be material to the Company's condensed consolidated financial statements. With respect to these projects, there is a wide range of potential outcomes that may result in material costs being incurred beyond the limits or term of insurance, such as: (i) greater than expected volumes of contaminants requiring remediation; (ii) treatment systems requiring operation beyond the insurance term; and (iii) greater than expected allocable share of the ultimate remedy. The Company does not believe these outcomes are likely, and the exact nature, impact and duration of any such occurrence could vary due to a number of factors. Accordingly, the Company is unable to provide an estimate of potential loss with a reasonable degree of accuracy. Nevertheless, if these events were to occur, the Company believes that it is reasonably possible that the amount of costs currently accrued, which represents the Company's best estimate, could increase by as much as $28,200, of which $4,800 would be covered by insurance.
	With respect to one of the projects noted above, the regulatory agency charged with oversight of the project approved a remedial plan that is more expensive than the remedy that had been proposed by the Company. A cost allocation among the potentially responsible parties has not been finalized. However, the Company (and the party from whom it assumed site responsibility) did not contribute in any way to the site contamination, and the Company believes that it has meritorious defenses to liability and that it will not ultimately be responsible for any material remedial costs attributable to the more costly selected remedy. Nevertheless, due to uncertainty over the cost allocation process, it is reasonably possible that the Company's recorded estimate could change. With respect to another one of these projects, the regulatory agency charged with oversight of the project selected a remedy that is consistent with regulatory guidance and the Company’s estimates. However, until the final remedy is actually implemented, it remains reasonably possible that the volumes associated with the selected remedial alternative could change and the related costs could increase. The Company's estimated share of the potential remedial cost changes related to these two projects range from $0 to $21,200.
	The Company adjusts all of its recorded liabilities as further information develops or circumstances change. The Company is unable to accurately project the time period over which these amounts would ultimately be paid out, however the Company estimates that any potential payments could be made over a 1 to 5 year period.
	Contract Damages
	The Company has entered into contracts which, among other things, require completion of the specified scope of work within a defined period of time or a defined budget. Certain of those contracts provide for the assessment of liquidated or other damages if certain project objectives are not met pursuant to the terms of the contract. At present, the Company does not believe a material assessment of such damages is reasonably possible.
	Government Contracts
	The Company's indirect cost rates applied to contracts with the U.S. Government and various state agencies are subject to examination and renegotiation. Contracts and other records of the Company with respect to federal contracts have been examined through June 30, 2008. The Company believes that adjustments resulting from such examination or renegotiation proceedings, if any, will not likely have a material impact on the Company's business, operating results, financial position and cash flows.
	Legal Matters
	The Company and its subsidiaries are subject to claims and lawsuits typical of those filed against engineering and consulting companies. The Company carries liability insurance, including professional liability insurance, against such claims subject to certain deductibles and policy limits. Except as described herein, management is of the opinion that the resolution of these claims and lawsuits will not likely have a material effect on the Company's operating results, financial position and cash flows.
	TRC Environmental Corporation v. LVI Group Services, Inc., United States District Court for the Western District of Texas, Austin Division 2014. TRC was the prime contractor on a project to demolish and decommission a power plant in Austin, Texas. LVI was a subcontractor on that project, and TRC sued LVI for approximately $3,000 for breaches in connection with LVI’s work. LVI filed a number of responsive pleadings in this lawsuit including a counterclaim for approximately $9,600. TRC believes that its claims against LVI are meritorious and that LVI’s counterclaim is without merit. Nevertheless, an adverse determination on LVI’s counterclaim could have a material adverse effect on the Company’s business, operating results, financial position and cash flows.
	The Company records actual or potential litigation-related losses in accordance with ASC Topic 450. As of March 27, 2015 and June 30, 2014, the Company had recorded litigation accruals of $3,337 and $5,410, respectively. The Company also had insurance recovery receivables related to the aforementioned litigation-related accruals of $2,004 and $4,098 as of March 27, 2015 and June 30, 2014, respectively.
	The Company periodically adjusts the amount of such liabilities when such actual or potential liabilities are paid or otherwise discharged, new claims arise, or additional relevant information about existing or potential claims becomes available. The Company believes that it is reasonably possible that the amount of potential litigation-related liabilities could increase by as much as $12,000, of which $2,500 would be covered by insurance.

Subsequent_Events

Subsequent Events	9 Months Ended
	Mar. 27, 2015
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events
	Effective April 30, 2015, the Company acquired all of the outstanding stock X-Line, Inc. (X-Line), based in Villa Rica, Ga. The initial purchase price consisted of a cash payment of $800 payable at closing, and a second payment of $200 placed in escrow, of which $50 is payable in six months, and the remaining balance due in 12 months. The purchase price is subject to a working capital adjustment, which is expected to be finalized within the next several months. The sellers are also entitled to up to $300 in contingent cash consideration through an earnout provision based on NSR performance of the acquired firm over the 12 month period following closing. X-Line is being integrated into the Company's Energy operating segment. Due to the limited time since the closing of the X-Line acquisition, the related acquisition accounting is incomplete at this time. As a result, the Company is unable to provide amounts recognized as of the acquisition date for major classes of assets and liabilities acquired and resulting from the transaction. The impact of this acquisition is not expected to be material to the Company's condensed consolidated balance sheets and results of operations.

Fair_Value_Measurements_Tables

Fair Value Measurements (Tables)	9 Months Ended
	Mar. 27, 2015
Fair Value Disclosures [Abstract]
Fair Value Measurements, Recurring and Nonrecurring	The following tables present the level within the fair value hierarchy at which the Company's financial assets and certain liabilities were measured on a recurring basis as of March 27, 2015 and June 30, 2014:
	Assets and Liabilities Measured at Fair Value on a Recurring Basis as of March 27, 2015
		Level 1			Level 2		Level 3		Total
	Restricted investments:
	Mutual funds	$	101		$	—	$	—	$	101
	Certificates of deposit	—			207		—		207
	Municipal bonds	—			752		—		752
	Corporate bonds	—			231		—		231
	U.S. government obligations	—			117		—		117
	Money market accounts and cash deposits	4,785			—		—		4,785
	Total assets	$	4,886		$	1,307	$	—	$	6,193
	Contingent consideration	$	—		$	—	$	368	$	368
	Total liabilities	$	—		$	—	$	368	$	368
	Assets and Liabilities Measured at Fair Value on a Recurring Basis as of June 30, 2014
		Level 1			Level 2		Level 3		Total
	Restricted investments:
	Mutual funds	$	140		$	—	$	—	$	140
	Certificates of deposit	—			209		—		209
	Municipal bonds	—			740		—		740
	Corporate bonds	—			236		—		236
	Asset backed securities	—			130		—		130
	Money market accounts and cash deposits	2,650			—		—		2,650
	Total assets	$	2,790		$	1,315	$	—	$	4,105
	Contingent consideration	$	—		$	—	$	352	$	352
	Total liabilities	$	—		$	—	$	352	$	352
Rollforward of contingent consideration liabilities	The table below presents a rollforward of the contingent consideration liabilities valued using Level 3 inputs:
	Contingent consideration balance at July 1, 2014	$	352
	Additions for fiscal year 2015 acquisitions	362
	Reduction of liability for payments made	(346		)
	Contingent consideration balance at March 27, 2015	$	368

StockBased_Compensation_Tables

Stock-Based Compensation (Tables)	9 Months Ended
	Mar. 27, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs	During the three and nine months ended March 27, 2015 and March 28, 2014, the Company recognized stock-based compensation expense in cost of services ("COS") and general and administrative expenses within the condensed consolidated statements of operations as follows:
			Three Months Ended							Nine Months Ended
			March 27,				March 28,			March 27,		March 28,
			2015				2014			2015		2014
	Cost of services		$	670			$	515		$	1,799	$	1,603
	General and administrative expenses		700				600			1,947		1,910
		Total stock-based compensation expense	$	1,370			$	1,115		$	3,746	$	3,513
Schedule of Share-based Compensation, Stock Options, Activity	A summary of stock option activity for the nine months ended March 27, 2015 under the Plans is as follows:
									Weighted-
									Average
					Weighted-				Remaining
					Average				Contractual	Aggregate
					Exercise				Term	Intrinsic
		Options			Price				(in years)	Value
	Outstanding options as of June 30, 2014 (649 exercisable)	654			$	9.62
	Options exercised	(61	)		$	5.39
	Options expired	(268	)		$	11.09
	Outstanding options as of March 27, 2015	325			$	9.19			1	$	320
	Options exercisable as of March 27, 2015	323			$	9.21			1	$	314
	Options vested and expected to vest as of March 27, 2015	325			$	9.19			1	$	320
Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity	A summary of non-vested RSU activity for the nine months ended March 27, 2015 is as follows:
					Weighted-
		Restricted			Average
		Stock			Grant Date
		Units			Fair Value
	Non-vested units as of June 30, 2014	1,007			$	6.06
	Units granted	403			$	6.9
	Units vested	(489	)		$	5.24
	Units forfeited	(6	)		$	6.89
	Non-vested units as of March 27, 2015	915			$	6.87
Disclosure of Compensation Related Costs, Share-based Payments	A summary of non-vested PSU activity for the nine months ended March 27, 2015 is as follows:
										Weighted-
		PSU						Total		Average
		Original			PSU			PSU		Grant Date
		Awards			Adjustments (1)			Awards		Fair Value
	Non-vested units as of June 30, 2014	879			—			879		$	6.5
	Units granted	433			31			464		$	6.9
	Units vested	(337	)		(31	)		(368	)	$	5.14
	Units forfeited	(34	)		—			(34	)	$	7.41
	Non-vested units as of March 27, 2015	941			—			941		$	7.1
	-1	Represents the additional number of PSU's issued based on the final performance condition achieved at the end of the respective performance period.

Earnings_per_Share_Tables

Earnings per Share (Tables)	9 Months Ended
	Mar. 27, 2015
Earnings Per Share [Abstract]
Schedule of Earnings Per Share, Basic and Diluted	The following table sets forth the computations of basic and diluted EPS for the three and nine months ended March 27, 2015 and March 28, 2014:
		Three Months Ended				Nine Months Ended
		March 27,		March 28,		March 27,		March 28,
		2015		2014		2015		2014
	Net income applicable to TRC Companies, Inc.	$	5,165	$	1,431	$	12,652	$	7,014
	Basic weighted-average common shares outstanding	30,382		29,691		30,233		29,549
	Effect of dilutive stock options, RSA's, RSU's and PSU's	355		475		318		539
	Diluted weighted-average common shares outstanding	30,737		30,166		30,551		30,088
	Earnings per common share applicable to TRC Companies, Inc.
	Basic earnings per common share	$	0.17	$	0.05	$	0.42	$	0.24
	Diluted earnings per common share	$	0.17	$	0.05	$	0.41	$	0.23
	Anti-dilutive stock options, RSA's, RSU's and PSU's, excluded from the calculation	1,832		2,153		1,868		2,088

Accounts_Receivable_Tables

Accounts Receivable (Tables)	9 Months Ended
	Mar. 27, 2015
Receivables [Abstract]
Current portion of accounts receivable and schedule of allowance for doubtful accounts	The current portion of accounts receivable as of March 27, 2015 and June 30, 2014, were comprised of the following:
			March 27,			June 30,
			2015			2014
	Billed		$	83,930		$	69,730
	Unbilled		51,760			50,743
	Retainage		4,394			5,184
		Total accounts receivable - gross	140,084			125,657
	Less allowance for doubtful accounts		(8,418		)	(8,720		)
		Total accounts receivable, less allowance for doubtful accounts	$	131,666		$	116,937

Other_Accrued_Liabilities_Tabl

Other Accrued Liabilities (Tables)	9 Months Ended
	Mar. 27, 2015
Accounts Payable and Accrued Liabilities, Current [Abstract]
Schedule of Accrued Liabilities	As of March 27, 2015 and June 30, 2014, other accrued liabilities were comprised of the following:
			March 27,		June 30,
			2015		2014
	Contract costs		$	28,266	$	26,289
	Legal accruals		3,761		5,903
	Lease obligations		3,741		3,420
	Other		4,855		11,698
		Total other accrued liabilities	$	40,623	$	47,310

Goodwill_and_Other_Intangible_1

Goodwill and Other Intangible Assets (Tables)	9 Months Ended
	Mar. 27, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Goodwill	The changes in the carrying amount of goodwill for the nine months ended March 27, 2015 by operating segment are as follows:
			Gross										Gross
			Balance,			Accumulated			Balance,				Balance,			Accumulated			Balance,
			July 1,			Impairment			July 1,		Additions /		March 27,			Impairment			March 27,
	Operating Segment		2014			Losses			2014		Adjustments		2015			Losses			2015
	Energy		$	27,836		$	(14,506	)	$	13,330	$	—	$	27,836		$	(14,506	)	$	13,330
	Environmental		36,214			(17,865		)	18,349		$	4,675	40,889			(17,865		)	23,024
	Infrastructure		7,224			(7,224		)	—		$	—	7,224			(7,224		)	—
			$	71,274		$	(39,595	)	$	31,679	$	4,675	$	75,949		$	(39,595	)	$	36,354
Schedule of Finite and Indefinite-Lived Intangible Assets	Identifiable intangible assets as of March 27, 2015 and June 30, 2014 are included in other assets on the condensed consolidated balance sheets and were comprised of:
			March 27, 2015								June 30, 2014
			Gross						Net		Gross					Net
			Carrying			Accumulated			Carrying		Carrying		Accumulated			Carrying
	Identifiable intangible assets		Amount			Amortization			Amount		Amount		Amortization			Amount
	With determinable lives:
	Customer relationships		$	16,213		$	(6,871	)	$	9,342	$	12,125	$	(4,400	)	$	7,725
	Contract backlog		—			—			—		110		(83		)	27
			16,213			(6,871		)	9,342		12,235		(4,483		)	7,752
	With indefinite lives:
	Engineering licenses		426			—			426		426		—			426
			$	16,639		$	(6,871	)	$	9,768	$	12,661	$	(4,483	)	$	8,178
Schedule of Expected Amortization Expense	Estimated amortization expense of intangible assets for the remainder of fiscal year 2015 and succeeding fiscal years is as follows:
	Fiscal Year			Amount
	2015			$	852
	2016			2,915
	2017			2,335
	2018			1,748
	2019			948
	2020 and Thereafter			544
		Total		$	9,342

Variable_Interest_Entity_Table

Variable Interest Entity (Tables)	9 Months Ended
	Mar. 27, 2015
Variable Interest Entity [Abstract]
Schedule of Variable Interest Entities	The following table sets forth the assets and liabilities of CAH included in the condensed consolidated balance sheets of the Company:
		March 27,		June 30,
		2015		2014
	Current assets:
	Restricted investments	$	63	$	63
	Total current assets	63		63
	Other assets	4,344		4,344
	Total assets	$	4,407	$	4,407
	Current liabilities:
	Environmental remediation liabilities	$	2	$	7
	Total current liabilities	2		7
	Long-term environmental remediation liabilities	18		16
	Total liabilities	$	20	$	23

Operating_Segments_Tables

Operating Segments (Tables)	9 Months Ended
	Mar. 27, 2015
Segment Reporting [Abstract]
Schedule of Segment Reporting Information, by Segment	The following tables present summarized financial information for the Company's operating segments (for the periods noted below):
			Energy			Environmental			Infrastructure			Total
	Three months ended March 27, 2015:
	Gross revenue		$	41,643		$	70,711		$	16,696		$	129,050
	Net service revenue		36,413			51,172			12,425			100,010
	Segment profit		8,676			9,942			2,806			21,424
	Depreciation and amortization		733			941			98			1,772
	Three months ended March 28, 2014:
	Gross revenue		$	44,480		$	60,750		$	14,223		$	119,453
	Net service revenue		34,632			41,939			10,403			86,974
	Segment profit		7,908			7,787			1,413			17,108
	Depreciation and amortization		835			633			106			1,574
			Energy			Environmental			Infrastructure			Total
	Nine months ended March 27, 2015:
	Gross revenue		$	122,124		$	219,960		$	53,142		$	395,226
	Net service revenue		104,789			151,383			36,978			293,150
	Segment profit		22,224			30,252			6,483			58,959
	Depreciation and amortization		2,376			2,764			329			5,469
	Nine months ended March 28, 2014:
	Gross revenue		$	118,050		$	182,692		$	46,692		$	347,434
	Net service revenue		98,339			124,860			34,430			257,629
	Segment profit		19,313			25,898			6,238			51,449
	Depreciation and amortization		2,385			2,039			318			4,742
			Three Months Ended						Nine Months Ended
	Gross revenue		March 27, 2015			March 28, 2014			March 27, 2015			March 28, 2014
	Gross revenue from reportable operating segments		$	129,050		$	119,453		$	395,226		$	347,434
	Reconciling items (1)		1,727			1,383			1,804			2,568
	Total consolidated gross revenue		$	130,777		$	120,836		$	397,030		$	350,002
	Net service revenue
	Net service revenue from reportable operating segments		$	100,010		$	86,974		$	293,150		$	257,629
	Reconciling items (1)		984			1,107			301			2,835
	Total consolidated net service revenue		$	100,994		$	88,081		$	293,451		$	260,464
	Income from operations before taxes
	Segment profit from reportable operating segments		$	21,424		$	17,108		$	58,959		$	51,449
	Corporate shared services (2)		(12,469		)	(12,895		)	(33,561		)	(34,131		)
	Stock-based compensation expense		(1,370		)	(1,115		)	(3,746		)	(3,513		)
	Unallocated depreciation and amortization		(436		)	(587		)	(1,645		)	(1,845		)
	Interest expense		(73		)	(22		)	(125		)	(152		)
	Total consolidated income from operations before taxes		$	7,076		$	2,489		$	19,882		$	11,808
	Depreciation and amortization
	Depreciation and amortization from reportable operating segments		$	1,772		$	1,574		$	5,469		$	4,742
	Unallocated depreciation and amortization		436			587			1,645			1,845
	Total consolidated depreciation and amortization		$	2,208		$	2,161		$	7,114		$	6,587
	-1	Amounts represent certain unallocated corporate amounts not considered in the CODM's evaluation of operating segment performance.
	-2	Corporate shared services consist of centrally managed functions in the following areas: accounting, treasury, information technology, legal, human resources, marketing, internal audit and executive management such as the CEO and various executives. These costs and other items of a general corporate nature are not allocated to the Company’s three operating segments.

Fair_Value_Measurements_Detail

Fair Value Measurements (Details) (Fair Value, Measurements, Recurring, USD $)	Mar. 27, 2015	Jun. 30, 2014
In Thousands, unless otherwise specified
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Restricted Investments, at Fair Value	$6,193	$4,105
Financial and Nonfinancial Liabilities, Fair Value Disclosure	368	352
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Restricted Investments, at Fair Value	4,886	2,790
Financial and Nonfinancial Liabilities, Fair Value Disclosure	0	0
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Restricted Investments, at Fair Value	1,307	1,315
Financial and Nonfinancial Liabilities, Fair Value Disclosure	0	0
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Restricted Investments, at Fair Value	0	0
Financial and Nonfinancial Liabilities, Fair Value Disclosure	368	352
Mutual Funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Restricted Investments, at Fair Value	101	140
Mutual Funds | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Restricted Investments, at Fair Value	101	140
Mutual Funds | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Restricted Investments, at Fair Value	0	0
Mutual Funds | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Restricted Investments, at Fair Value	0	0
Certificates of deposit
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Restricted Investments, at Fair Value	207	209
Certificates of deposit | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Restricted Investments, at Fair Value	0	0
Certificates of deposit | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Restricted Investments, at Fair Value	207	209
Certificates of deposit | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Restricted Investments, at Fair Value	0	0
Municipal Bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Restricted Investments, at Fair Value	752	740
Municipal Bonds | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Restricted Investments, at Fair Value	0	0
Municipal Bonds | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Restricted Investments, at Fair Value	752	740
Municipal Bonds | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Restricted Investments, at Fair Value	0	0
Corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Restricted Investments, at Fair Value	231	236
Corporate bonds | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Restricted Investments, at Fair Value	0	0
Corporate bonds | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Restricted Investments, at Fair Value	231	236
Corporate bonds | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Restricted Investments, at Fair Value	0	0
US Treasury and Government [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Restricted Investments, at Fair Value	117
US Treasury and Government [Member] | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Restricted Investments, at Fair Value	0
US Treasury and Government [Member] | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Restricted Investments, at Fair Value	117
US Treasury and Government [Member] | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Restricted Investments, at Fair Value	0
Assets backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Restricted Investments, at Fair Value		130
Assets backed securities | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Restricted Investments, at Fair Value		0
Assets backed securities | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Restricted Investments, at Fair Value		130
Assets backed securities | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Restricted Investments, at Fair Value		0
Money market accounts and cash deposits
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Restricted Investments, at Fair Value	4,785	2,650
Money market accounts and cash deposits | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Restricted Investments, at Fair Value	4,785	2,650
Money market accounts and cash deposits | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Restricted Investments, at Fair Value	0	0
Money market accounts and cash deposits | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Restricted Investments, at Fair Value	0	0
Contingent Consideration
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial and Nonfinancial Liabilities, Fair Value Disclosure	368	352
Contingent Consideration | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial and Nonfinancial Liabilities, Fair Value Disclosure	0	0
Contingent Consideration | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial and Nonfinancial Liabilities, Fair Value Disclosure	0	0
Contingent Consideration | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial and Nonfinancial Liabilities, Fair Value Disclosure	$368	$352

Fair_Value_Measurements_Roll_F

Fair Value Measurements Roll Forward (Details) (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Mar. 27, 2015
Contingent Consideration Liability [Roll Forward]
Contingent consideration balance at July 1, 2014	$352
Additions for fiscal year 2015 acquisitions	362
Reduction of liability for payments made	-346
Contingent consideration balance at March 27, 2015	$368

StockBased_Compensation_StockB

Stock-Based Compensation - Stock-Based Award Plans (Details)	9 Months Ended
	Mar. 27, 2015
	stock_based_award_plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Types of Awards Available for Grant	2
Number Of Awards That Can Be Granted Annually	100,000
Share Based Compensation Arrangement By Share Based Payment Award, Time Period Of Grant Award Limitations	12 months
Options Available For Future Grant	3,111,000
Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards CEO Has Authority To Grant	10,000

StockBased_Compensation_Schedu

Stock-Based Compensation - Schedule of Employee Service-based Compensation, Allocation of Recognized Period Costs (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Mar. 27, 2015	Mar. 28, 2014	Mar. 27, 2015	Mar. 28, 2014
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Allocated Share-based Compensation Expense	$1,370	$1,115	$3,746	$3,513
Excess tax benefit from stock-based awards			251	3,385
Cost of Sales
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Allocated Share-based Compensation Expense	670	515	1,799	1,603
General and Administrative Expenses
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Allocated Share-based Compensation Expense	$700	$600	$1,947	$1,910

StockBased_Compensation_Summar

Stock-Based Compensation - Summary Of Stock Option Activity (Details) (USD $)	9 Months Ended
In Thousands, except Share data, unless otherwise specified	Mar. 27, 2015	Mar. 28, 2014	Jun. 30, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercisable options			649,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Outstanding Options At Beginning Of Period (in shares)	654,000
Exercise of stock options (in shares)	61,000
Expiration of Stock Options (in shares)	268,000
Outstanding Options At End Of Period (in shares)	325,000
Options Exercisable	323,000
Options Vested And Expected To Vest	325,000
Options Available For Future Grant	3,111,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]
Outstanding Options At Beginning Of Period, Weighted Average Exercise Price	$9.62
Options Exercised, Weighted Average Exercise Price	$5.39
Expiration of Stock Options, Weighted Average Exercise Price	$11.09
Outstanding Options At End Of Period, Weighted Average Exercise Price	$9.19
Options Exercisable, Weighted Average Exercise Price	$9.21
Options Vested And Expected To Vest, Weighted Average Exercise Price	$9.19
Options Outstanding, Weighted Average Remaining Contractual Term	1 year
Options Exercisable, Weighted Average Remaining Contractual Term	1 year
Options Vested and Expected to Vest, Weighted Average Remaining Contractual Term	1 year
Outstanding Options, Aggregate Intrinsic Value	$320
Options Exercisable, Aggregate Intrinsic Value	314
Options Vested And Expected To Vest, Aggregate Intrinsic Value	320
Share Price	$8.27
Total intrinsic value of options exercised	134	33
Proceeds received from options exercised	327	55
Unrecognized compensation expense related to unvested stock option grants	$4
Employee Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]
Weighted Average Period Expected To Vest, Total Compensation Cost Not yet Recognized on Unvested Awards	1 year 11 days

StockBased_Compensation_Summar1

Stock-Based Compensation - Summary of Non Vested Restricted Stock Awards/Units (Details) (USD $)	9 Months Ended		3 Months Ended		9 Months Ended	6 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Mar. 27, 2015		Mar. 27, 2015	Mar. 28, 2014	Mar. 28, 2014	Dec. 26, 2014
Restricted Stock Award
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Awards granted	0
Non-vested awards, end of period	6		6
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]
Vesting Period	4 years
Total unrecognized compensation expense related to unvested awards	$25		$25
Weighted Average Period Expected To Vest, Total Compensation Cost Not yet Recognized on Unvested Awards	1 year 5 months 6 days
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Non-vested awards, beginning of period	1,007					1,007
Awards granted	403		26	14	336
Awards vested	-489
Awards forfeited	-6
Non-vested awards, end of period	915		915
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]
Non-vested awards, Weighted Average Grate Date Fair Value, Beginning Of Period	$6.06					$6.06
Awards Granted, Weighted Average Grant Date Fair Value	$6.90
Awards vested, Weighted Average Grant Date Fair Value	$5.24
Awards forfeited, Weighted Average Grant Date Fair Value	$6.89
Non-vested awards, Weighted Average Grate Date Fair Value, End Of Period	$6.87		$6.87
Vesting Period	4 years
Total unrecognized compensation expense related to unvested awards	4,887		4,887
Weighted Average Period Expected To Vest, Total Compensation Cost Not yet Recognized on Unvested Awards	2 years 6 months 20 days
Share Based Compensation Arrangement By Share Based Payment Award, Equity Instruments Other Than Options, Weighted Average Grant Date Fair Value	2,781		203
Awards Granted, Fair Value At Grant Date				93	2,622
Total Fair Value Of Units Vesting During Period	2,797		202	128	4,407
Performance Stock Units (PSUs)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Awards granted	464				355
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]
Non-vested awards, Weighted Average Grate Date Fair Value, Beginning Of Period	$6.50					$6.50
Awards Granted, Weighted Average Grant Date Fair Value	$6.90
Awards vested, Weighted Average Grant Date Fair Value	$5.14
Awards forfeited, Weighted Average Grant Date Fair Value	$7.41
Non-vested awards, Weighted Average Grate Date Fair Value, End Of Period	$7.10		$7.10
Vesting Period						4 years
Total unrecognized compensation expense related to unvested awards	6,496		6,496
Weighted Average Period Expected To Vest, Total Compensation Cost Not yet Recognized on Unvested Awards	1 year 11 months
Share Based Compensation Arrangement By Share Based Payment Award, Equity Instruments Other Than Options, Weighted Average Grant Date Fair Value	2,986				2,827
Total Fair Value Of Units Vesting During Period	$1,977				$2,234
Minimum | Performance Stock Units (PSUs)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]
Percentage Of Payout Earned Based On Predefined Targets	0.00%
Maximum | Performance Stock Units (PSUs)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]
Percentage Of Payout Earned Based On Predefined Targets	150.00%
Scenario, Previously Reported [Member] | Performance Stock Units (PSUs)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Non-vested awards, beginning of period	879					879
Awards granted	433
Awards vested	-337
Awards forfeited	-34
Non-vested awards, end of period	941		941
Scenario, Adjustment [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Awards granted	31	[1]
Awards vested	-31	[1]
Scenario, Actual [Member] | Performance Stock Units (PSUs)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Non-vested awards, beginning of period	879					879
Awards granted	464
Awards vested	-368
Awards forfeited	-34
Non-vested awards, end of period	941		941
[1]	Represents the additional number of PSU's issued based on the final performance condition achieved at the end of the respective performance period.

Earnings_per_Share_Details

Earnings per Share (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Mar. 27, 2015	Mar. 28, 2014	Mar. 27, 2015	Mar. 28, 2014
Earnings Per Share [Abstract]
Net income applicable to TRC Companies, Inc.	$5,165	$1,431	$12,652	$7,014
Basic (shares)	30,382	29,691	30,233	29,549
Effect of dilutive stock options, RSA's, RSU's and PSU's (in shares)	355	475	318	539
Diluted weighted-average common shares outstanding (in shares)	30,737	30,166	30,551	30,088
Basic earnings per common share (in dollars per share)	$0.17	$0.05	$0.42	$0.24
Diluted earnings per common share (in dollars per share)	$0.17	$0.05	$0.41	$0.23
Anti-dilutive stock options, RSA's, RSU's and PSU's, excluded from the calculation (in dollars per share)	1,832	2,153	1,868	2,088

Accounts_Receivable_Current_Po

Accounts Receivable - Current Portion of Accounts Receivable (Details) (USD $)	Mar. 27, 2015	Jun. 30, 2014
In Thousands, unless otherwise specified
Accounts Receivable, Net, Current [Abstract]
Total accounts receivable - gross	$140,084	$125,657
Less allowance for doubtful accounts	-8,418	-8,720
Accounts Receivable, Net, Current	131,666	116,937
Accounts Receivable | Billed
Accounts Receivable, Net, Current [Abstract]
Total accounts receivable - gross	83,930	69,730
Accounts Receivable | Unbilled
Accounts Receivable, Net, Current [Abstract]
Total accounts receivable - gross	51,760	50,743
Retainage
Accounts Receivable, Net, Current [Abstract]
Total accounts receivable - gross	$4,394	$5,184

Other_Accrued_Liabilities_Deta

Other Accrued Liabilities (Details) (USD $)	Mar. 27, 2015	Jun. 30, 2014
In Thousands, unless otherwise specified
Accounts Payable and Accrued Liabilities, Current [Abstract]
Contract costs	$28,266	$26,289
Legal accruals	3,761	5,903
Lease obligations	3,741	3,420
Other	4,855	11,698
Total other accrued liabilities	$40,623	$47,310

Goodwill_and_Other_Intangible_2

Goodwill and Other Intangible Assets - Goodwill (Details) (USD $)	3 Months Ended		9 Months Ended		0 Months Ended
In Thousands, unless otherwise specified	Mar. 27, 2015	Mar. 28, 2014	Mar. 27, 2015	Mar. 28, 2014	Sep. 29, 2014	Jul. 01, 2014	Dec. 26, 2014
Goodwill [Line Items]
Amortization of Intangible Assets	$905	$755	$2,633	$2,127
Goodwill [Roll Forward]
Gross Goodwill, Beginning of Period			71,274			71,274
Goodwill, Impaired, Accumulated Impairment Loss, Beginning of Period			-39,595			-39,595
Goodwill, Beginning of Period			31,679			31,679
Goodwill, Period Increase (Decrease)			4,675
Gross Goodwill, End of Period	75,949		75,949
Goodwill, Impaired, Accumulated Impairment Loss, End of Period	-39,595		-39,595
Goodwill	36,354		36,354
Energy Operating Segment
Goodwill [Roll Forward]
Gross Goodwill, Beginning of Period			27,836			27,836
Goodwill, Impaired, Accumulated Impairment Loss, Beginning of Period			-14,506			-14,506
Goodwill, Beginning of Period			13,330			13,330
Goodwill, Period Increase (Decrease)			0
Gross Goodwill, End of Period	27,836		27,836
Goodwill, Impaired, Accumulated Impairment Loss, End of Period	-14,506		-14,506
Goodwill	13,330		13,330
Environmental Operating Segment
Goodwill [Roll Forward]
Gross Goodwill, Beginning of Period			36,214			36,214
Goodwill, Impaired, Accumulated Impairment Loss, Beginning of Period			-17,865			-17,865
Goodwill, Beginning of Period			18,349			18,349
Goodwill, Period Increase (Decrease)			4,675
Gross Goodwill, End of Period	40,889		40,889
Goodwill, Impaired, Accumulated Impairment Loss, End of Period	-17,865		-17,865
Goodwill	23,024		23,024
Infrastructure Operating Segment
Goodwill [Roll Forward]
Gross Goodwill, Beginning of Period			7,224			7,224
Goodwill, Impaired, Accumulated Impairment Loss, Beginning of Period			-7,224			-7,224
Goodwill, Beginning of Period			0			0
Goodwill, Period Increase (Decrease)			0
Gross Goodwill, End of Period	7,224		7,224
Goodwill, Impaired, Accumulated Impairment Loss, End of Period	-7,224		-7,224
Goodwill	0		0
NOVA Safety & Environmental [Member]
Goodwill [Line Items]
Business Acquisition, Cash Paid					7,198
Business Acquisition, Cost Of Acquired Entity, Cash Paid in Year Two					2,600
Business Acquisition, Intangible Assets Other than Goodwill							3,622
Additions for fiscal year 2015 acquisitions					1,500		287
Business Combination, Net Working Capital Adjustment					560
Goodwill [Roll Forward]
Goodwill, Beginning of Period							3,683
Goodwill							3,683
Business Acquisition, Cost Of Acquired Entity, Cash Paid in Year Two, Due in Period One					508
Business Acquisition, Cost Of Acquired Entity, Cash Paid in Year Two, Due in Period Two					2,092
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares					50
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable					323
Covino Environmental Associates, Inc. [Member]
Goodwill [Line Items]
Business Acquisition, Purchase Price						1,994
Business Acquisition, Cash Paid						1,500
Business Acquisition, Cost Of Acquired Entity, Cash Paid in Year Two						309
Business Acquisition, Intangible Assets Other than Goodwill						601
Additions for fiscal year 2015 acquisitions						75
Business Combination, Net Working Capital Adjustment						110
Goodwill [Roll Forward]
Goodwill, Beginning of Period			$992			$992

Goodwill_and_Other_Intangible_3

Goodwill and Other Intangible Assets - Identifiable Intangible Assets (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Mar. 27, 2015	Mar. 28, 2014	Mar. 27, 2015	Mar. 28, 2014	Jun. 30, 2014	Sep. 29, 2014
Finite-lived Intangible Assets
Finite-Lived Intangible Assets, Gross			$12,235
Accumulated Amortization of Identifiable Intangible Assets	-6,871		-6,871		-4,483
Finite-Lived Intangible Assets, Net	9,342		9,342		7,752
Indefinite-lived Intangible Assets
Indefinite-Lived Intangible Assets (Excluding Goodwill)	16,639		16,639		12,661
Intangible Assets Net Excluding Goodwill Accumulated Amortization	-6,871		-6,871		-4,483
Intangible Assets, Net (Excluding Goodwill)	9,768		9,768		8,178
Amortization period of identifiable intangible assets			6 years
Amortization of Intangible Assets	905	755	2,633	2,127
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
2015	852		852
2016	2,915		2,915
2017	2,335		2,335
2018	1,748		1,748
2019	948		948
2020 and thereafter	544		544
Engineering Licenses
Indefinite-lived Intangible Assets
Indefinite-Lived Intangible Assets (Excluding Goodwill)	426		426		426
Customer Relationships
Finite-lived Intangible Assets
Finite-Lived Intangible Assets, Gross			12,125
Accumulated Amortization of Identifiable Intangible Assets	-6,871		-6,871		-4,400
Finite-Lived Intangible Assets, Net	9,342		9,342		7,725
Indefinite-lived Intangible Assets
Amortization period of identifiable intangible assets			6 years
Contract Backlog
Finite-lived Intangible Assets
Finite-Lived Intangible Assets, Gross			110
Accumulated Amortization of Identifiable Intangible Assets	0		0		-83
Finite-Lived Intangible Assets, Net	0		0		27
Indefinite-lived Intangible Assets
Amortization period of identifiable intangible assets			4 months
NOVA Safety & Environmental [Member]
Indentifiable Intangible Assets [Line Items]
Business Combination, Net Working Capital Adjustment						$560

LongTerm_Debt_and_Capital_Leas1

Long-Term Debt and Capital Lease Obligations (Details) (USD $)	0 Months Ended	1 Months Ended		9 Months Ended
	Apr. 16, 2013	Jul. 31, 2014	Mar. 31, 2012	Mar. 27, 2015	Jun. 30, 2014	Mar. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
		Payments				Payments
Line of Credit Facility [Abstract]
Debt Instrument, Length Of Loan	5 years
Capital Lease Obligations				1,916,000
Accumulated amortization				50,283,000	47,190,000
Revolving Credit Facility
Line of Credit Facility [Abstract]
Senior Revolving Credit Facility, Maximum Borrowing Capacity	95,000,000
Letters of Credit, Amount Available For Issue	15,000,000
Subordinated Debt | Other note payable
Line of Credit Facility [Abstract]
Debt Instrument, Length Of Loan			3 years
Long-term Debt		5,247,000
Number Of Installment Payments		11				12
Debt Instrument, Face Amount						2,195,000
Debt Instrument, Frequency of Periodic Payment			quarterly
Debt Instrument, Periodic Payment		482,000	190,000
Stated Finance Charge Rate		1.99%				2.74%
Capital Lease Obligations
Line of Credit Facility [Abstract]
Debt, Weighted Average Interest Rate				2.55%
Minimum | Revolving Credit Facility
Line of Credit Facility [Abstract]
Line of Credit Facility, Current Borrowing Capacity	75,000,000
Furniture and Fixtures [Member] | Capital Lease Obligations
Line of Credit Facility [Abstract]
Capital Lease Obligations						161,000
Furniture And Equipment | Capital Lease Obligations
Line of Credit Facility [Abstract]
Capital Lease Obligations							1,160,000	756,000
Assets Held under Capital Leases
Line of Credit Facility [Abstract]
Accumulated amortization				1,440,000
RBS Citizen [Member]
Line of Credit Facility [Abstract]
Letters of Credit and Indebtedness, Outstanding				261,000	701,000
RBS Citizen [Member] | Revolving Credit Facility
Line of Credit Facility [Abstract]
Letters of Credit Outstanding, Amount				2,648,000	3,148,000
Line of Credit Facility, Current Borrowing Capacity				75,000,000	68,536,000
Line of Credit Facility, Remaining Borrowing Capacity				72,091,000	64,687,000
RBS Citizen [Member] | Minimum | Revolving Credit Facility
Line of Credit Facility [Abstract]
Fixed Charge Coverage Ratio				1.25
RBS Citizen [Member] | Minimum | Revolving Credit Facility | Prime Rate
Line of Credit Facility [Abstract]
Margin Percentage Related To Interest On Revolving Credit Facility				1.00%
RBS Citizen [Member] | Minimum | Revolving Credit Facility | LIBOR
Line of Credit Facility [Abstract]
Margin Percentage Related To Interest On Revolving Credit Facility				2.00%
RBS Citizen [Member] | Maximum | Revolving Credit Facility
Line of Credit Facility [Abstract]
Line of Credit Facility, Leverage Ratio				2
RBS Citizen [Member] | Maximum | Revolving Credit Facility | Prime Rate
Line of Credit Facility [Abstract]
Margin Percentage Related To Interest On Revolving Credit Facility				1.50%
RBS Citizen [Member] | Maximum | Revolving Credit Facility | LIBOR
Line of Credit Facility [Abstract]
Margin Percentage Related To Interest On Revolving Credit Facility				2.50%
June 30, 2014 [Member] | RBS Citizen [Member] | Revolving Credit Facility
Line of Credit Facility [Abstract]
Earnings Before Interest, Taxes, Deprecation and Amortization				20,000,000
Credit Agreement One [Member] | Subordinated Debt | Other note payable
Line of Credit Facility [Abstract]
Long-term Debt				0
Credit Agreement Two [Member] | Subordinated Debt | Other note payable
Line of Credit Facility [Abstract]
Long-term Debt				961,000

Variable_Interest_Entity_Detai

Variable Interest Entity (Details) (USD $)	9 Months Ended
	Mar. 27, 2015	Jun. 30, 2014	Oct. 01, 2013
Current assets:
Restricted investments	$6,892,000	$2,934,000
Total current assets	229,726,000	221,041,000
Other assets	15,076,000	13,490,000
Total assets	343,654,000	335,585,000
Current liabilities:
Environmental remediation liabilities	8,147,000	138,000
Total current liabilities	134,984,000	132,225,000
Long-term environmental remediation liabilities	527,000	6,268,000
Total liabilities	203,590,000	210,702,000
Variable Interest Entity, Amount of Financial Support	4,023,000
Variable Interest Entity, Primary Beneficiary [Member]
Current assets:
Restricted investments	63,000	63,000
Total current assets	63,000	63,000
Other assets	4,344,000	4,344,000
Total assets	4,407,000	4,407,000
Current liabilities:
Environmental remediation liabilities	2,000	7,000
Total current liabilities	2,000	7,000
Long-term environmental remediation liabilities	18,000	16,000
Total liabilities	20,000	23,000
CenterAvenueHoldings [Member] | Subordinated Debt | Variable Interest Entity, Primary Beneficiary [Member]
Current liabilities:
Subordinated Long-term Debt, Noncurrent			$2,448,000

Income_Taxes_Federal_and_State

Income Taxes - Federal and State Income Tax (Provision) Benefit (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Mar. 27, 2015	Mar. 28, 2014	Mar. 27, 2015	Mar. 28, 2014
Income Tax Disclosure [Abstract]
Recorded liability for uncertain tax positions	$1,481		$1,481
Deferred Tax Assets, Exercise of Non-Qualified Stock Options	3,321		3,321
Adjustments to Additional Paid in Capital, Income Tax Benefit from Share-based Compensation			251
Effective Income Tax Rate, Continuing Operations	27.10%	42.60%	36.40%	40.80%
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate			35.00%
Adjustments to Additional Paid in Capital, Income Tax Deficiency from Share-based Compensation			$518

Operating_Segments_Segment_Sum

Operating Segments - Segment Summary (Details) (USD $)	3 Months Ended				6 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Mar. 27, 2015	Dec. 26, 2014	Mar. 28, 2014	Dec. 27, 2013	Dec. 26, 2014	Dec. 27, 2013	Mar. 27, 2015	Mar. 28, 2014
Segment Reporting Information [Line Items]
Number of operating segments (in segments)							3
Gross revenue	$130,777		$120,836				$397,030	$350,002
Net service revenue	100,994		88,081				293,451	260,464
Segment profit	7,149		2,511				20,007	11,960
Depreciation and amortization	2,208		2,161				7,114	6,587
Total [Member]
Segment Reporting Information [Line Items]
Gross revenue	129,050	129,050	119,453	119,453	395,226	347,434	395,226	347,434
Net service revenue	100,010	100,010	86,974	86,974	293,150	257,629	293,150	257,629
Segment profit	21,424	21,424	17,108	17,108	58,959	51,449	58,959	51,449
Depreciation and amortization	1,772	1,772	1,574	1,574	5,469	4,742	5,469	4,742
Energy
Segment Reporting Information [Line Items]
Gross revenue		41,643		44,480	122,124	118,050
Net service revenue		36,413		34,632	104,789	98,339
Segment profit		8,676		7,908	22,224	19,313
Depreciation and amortization		733		835	2,376	2,385
Environmental
Segment Reporting Information [Line Items]
Gross revenue		70,711		60,750	219,960	182,692
Net service revenue		51,172		41,939	151,383	124,860
Segment profit		9,942		7,787	30,252	25,898
Depreciation and amortization		941		633	2,764	2,039
Infrastructure
Segment Reporting Information [Line Items]
Gross revenue		16,696		14,223	53,142	46,692
Net service revenue		12,425		10,403	36,978	34,430
Segment profit		2,806		1,413	6,483	6,238
Depreciation and amortization		$98		$106	$329	$318

Operating_Segments_Segment_Det

Operating Segments - Segment Detail (Details) (USD $)	3 Months Ended						6 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Mar. 27, 2015		Dec. 26, 2014	Mar. 28, 2014		Dec. 27, 2013	Dec. 26, 2014	Dec. 27, 2013	Mar. 27, 2015		Mar. 28, 2014
Segment Reporting Information [Line Items]
Gross revenue	$130,777			$120,836					$397,030		$350,002
Net service revenue	100,994			88,081					293,451		260,464
Operating income (loss)	7,149			2,511					20,007		11,960
Corporate shared services(2)	-12,469	[1]		-12,895	[1]				-33,561	[1]	-34,131	[1]
Allocated Share-based Compensation Expense	-1,370			-1,115					-3,746		-3,513
Depreciation and amortization	-2,208			-2,161					-7,114		-6,587
Interest expense	-73			-22					-125		-152
Income from operations before taxes	7,076			2,489					19,882		11,808
Operating Segments
Segment Reporting Information [Line Items]
Gross revenue	129,050		129,050	119,453		119,453	395,226	347,434	395,226		347,434
Net service revenue	100,010		100,010	86,974		86,974	293,150	257,629	293,150		257,629
Operating income (loss)	21,424		21,424	17,108		17,108	58,959	51,449	58,959		51,449
Depreciation and amortization	-1,772		-1,772	-1,574		-1,574	-5,469	-4,742	-5,469		-4,742
Reconciling Items
Segment Reporting Information [Line Items]
Gross revenue	1,727	[2]		1,383	[2]				1,804	[2]	2,568	[2]
Net service revenue	984	[2]		1,107	[2]				301	[2]	2,835	[2]
Depreciation and amortization	($436)			($587)					($1,645)		($1,845)
[1]	Corporate shared services consist of centrally managed functions in the following areas: accounting, treasury, information technology, legal, human resources, marketing, internal audit and executive management such as the CEO and various executives. These costs and other items of a general corporate nature are not allocated to the Companybs three operating segments.
[2]	Amounts represent certain unallocated corporate amounts not considered in the CODM's evaluation of operating segment performance.

Change_in_Estimate_Details

Change in Estimate (Details) (USD $)	3 Months Ended		9 Months Ended		1 Months Ended
In Thousands, unless otherwise specified	Mar. 27, 2015	Mar. 28, 2014	Mar. 27, 2015	Mar. 28, 2014	Oct. 31, 2013	Feb. 28, 2014
Change in Accounting Estimate [Line Items]
Gross revenue	$130,777	$120,836	$397,030	$350,002
Net service revenue	100,994	88,081	293,451	260,464
Insurance recoveries	753	5,008	6,238	17,613
Current Site Remedy [Member]
Change in Accounting Estimate [Line Items]
Modification of estimate					12,439
Current Site Remedy [Member] | Scenario, Adjustment [Member]
Change in Accounting Estimate [Line Items]
Gross revenue				5,093
Net service revenue				7,346
Insurance recoveries				12,439
Supplemental Feasibility Study [Member] | Scenario, Adjustment [Member]
Change in Accounting Estimate [Line Items]
Modification of estimate						4,877
Gross revenue				1,855
Net service revenue				3,022
Insurance recoveries		$4,877

Commitments_and_Contingencies_

Commitments and Contingencies (Details) (USD $)	9 Months Ended
	Mar. 27, 2015	Jun. 30, 2014
Loss Contingencies [Line Items]
Accrued litigation-related liabilities	$3,337,000	$5,410,000
Insurance recovery receivables related to litigation related reserves	2,004,000	4,098,000
Possible increase in potential litigation related liabilities	12,000,000
Amount of potential litigation related liabilities covered by insurance	2,500,000
Environmental Restoration Costs
Loss Contingencies [Line Items]
Loss Contingency, Estimate of Possible Loss	28,200,000
Loss contingency beyond the limits or term of insurance, minimum	0
Loss contingency beyond the limits or term of insurance, maximum	21,200,000
Amount of potential litigation related liabilities covered by insurance	4,800,000
Minimum | Environmental Restoration Costs
Loss Contingencies [Line Items]
Loss Contingency, Expected Payment Period	1 year
Maximum | Environmental Restoration Costs
Loss Contingencies [Line Items]
Loss Contingency, Expected Payment Period	5 years
TRC vs LVI Group Services Inc [Member] | Pending Litigation [Member] | Favorable Regulatory Action [Member]
Loss Contingencies [Line Items]
Gain Contingency, Unrecorded Amount	3,000,000
TRC vs LVI Group Services Inc [Member] | Pending Litigation [Member] | Unfavorable Regulatory Action [Member]
Loss Contingencies [Line Items]
Loss Contingency, Damages Sought, Value	$9,600,000

Subsequent_Events_Details

Subsequent Events (Details) (Subsequent Event [Member], X-Line [Member], USD $)	0 Months Ended
In Thousands, unless otherwise specified	Apr. 30, 2015	Apr. 30, 2015
Subsequent Event [Member] | X-Line [Member]
Subsequent Event [Line Items]
Business Acquisition, Cash Paid	$800
Escrow Deposit	200	200
Escrow deposit payable in six months	50	50
Additions for fiscal year 2015 acquisitions	$300	$300

Uncategorized_Items

Uncategorized Items	3/27/15
	USD ($)
[us-gaap_FiniteLivedIntangibleAssetsGross]	16,213,000	16,213,000	0