Charah Solutions, Inc. 8.50% Se (CHRB) 10-Q 14 Nov 18 2018 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2018	Nov. 14, 2018
Document And Entity Information [Abstract]
Entity Registrant Name	Charah Solutions, Inc.
Entity Central Index Key	1,730,346
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer
Document Type	10-Q
Document Period End Date	Sep. 30, 2018
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	Q3
Amendment Flag	false
Entity Emerging Growth Company	true
Entity Small Business	false
Entity Ex Transition Period	false
Entity Common Stock, Shares Outstanding		29,082,988

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets (Unaudited) - USD ($)	Sep. 30, 2018	Dec. 31, 2017
Current assets:
Cash	$ 3,981,000	$ 32,264,000
Trade accounts receivable	74,782,000	47,227,000
Receivable from affiliates	260,000	38,000
Costs and estimated earnings in excess of billings (CIE)	62,549,000	7,959,000
Inventory	24,557,000	1,666,000
Prepaid expenses and other current assets	6,416,000	4,644,000
Total current assets	172,545,000	93,798,000
Property and equipment:
Plant, machinery and equipment	73,816,000	42,565,000
Structural fill site improvements	55,760,000	55,760,000
Vehicles	15,630,000	16,478,000
Office equipment	1,473,000	638,000
Buildings and leasehold improvements	285,000	240,000
Structural fill sites	7,110,000	7,110,000
Total property and equipment	154,074,000	122,791,000
Less accumulated depreciation and amortization	(57,231,000)	(22,861,000)
Property and equipment, net	96,843,000	99,930,000
Other assets:
Trade name, net	34,900,000	34,330,000
Other intangible assets, net	69,000	87,000
Goodwill	73,468,000	73,468,000
Other assets	2,659,000	0
Deferred tax asset	3,076,000	0
Equity method investments	5,389,000	5,006,000
Total assets	458,763,000	377,651,000
Current liabilities:
Accounts payable	19,928,000	15,247,000
Billings in excess of costs and estimated earnings (BIE)	4,599,000	15,882,000
Notes payable, current maturities	20,766,000	19,996,000
Accrued payroll and bonuses	34,197,000	16,036,000
Asset retirement obligation	8,906,000	1,072,000
Purchase option liability, current portion	18,178,000	5,061,000
Accrued expenses	33,135,000	7,959,000
Other liabilities	0	198,000
Total current liabilities	139,709,000	81,451,000
Long-term liabilities:
Purchase option liability, less current portion	0	20,183,000
Contingent earnout liability	12,037,000	0
Line of credit	5,106,000	0
Notes payable, less current maturities	214,596,000	227,698,000
Total liabilities	371,448,000	329,332,000
Commitments and contingencies (see Note 11)
Stockholders’ and members’ equity
Retained earnings	4,946,000	18,316,000
Total stockholders’ and members’ equity	86,439,000	47,721,000
Non-controlling interest	876,000	598,000
Total equity	87,315,000	48,319,000
Total liabilities and equity	458,763,000	377,651,000
Additional Paid In Capital
Stockholders’ and members’ equity
Common Stock - Charah Solutions, Inc.—$0.01 par value; 200,000,000 shares authorized, 29,082,988 shares issued and outstanding	291,000	0
Additional paid in capital - Charah Solutions, Inc.	81,202,000	0
Members’ interest—Charah, LLC Series A, no par, 200,000,000 members’ interest authorized (104,109,890 issued and outstanding) as of December 31, 2017. Series B, no par, 100,000,000 members’ interest authorized (35,199,063 issued and outstanding) as of December 31, 2017
Stockholders’ and members’ equity
Members' interest	0	19,718,000
Total equity	0	19,718,000
Members’ interest—Allied Power Management, LLC, Series A, no par, 200,000,000 members’ interest authorized (7,210,555 issued and outstanding) as of December 31, 2017. Series B, no par, 100,000,000 members’ interest authorized (2,437,855 issued and outstanding) as of December 31, 2017
Stockholders’ and members’ equity
Members' interest	0	9,687,000
Total equity	0	9,687,000
Customer relationships
Other assets:
Finite lived intangible assets, net	66,523,000	71,032,000
Technology
Other assets:
Finite lived intangible assets, net	2,026,000	0
Non-compete and other agreements
Other assets:
Finite lived intangible assets, net	$ 1,265,000	$ 0

Condensed Consolidated Balanc_2

Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical)	Sep. 30, 2018$ / sharesshares	Dec. 31, 2017$ / sharesshares
Common stock, par value (in dollars per share) | $ / shares	$ 0.01	$ 0
Common stock, shares authorized (in shares)	200,000,000	0
Common stock, shares issued (in shares)	29,082,988	0
Common stock, shares outstanding (in shares)	29,082,988	0
Charah, LLC Members’ Interest | Series A
Common unit, no par value (in dollars per unit) | $ / shares	0	0
Common unit, authorized (in units)	0	200,000,000
Common unit, issued (in units)	0	104,109,890
Common unit, outstanding (in units)	0	104,109,890
Charah, LLC Members’ Interest | Series B
Common unit, no par value (in dollars per unit) | $ / shares	0	0
Common unit, authorized (in units)	0	100,000,000,000
Common unit, issued (in units)	0	35,199,063,000
Common unit, outstanding (in units)	0	35,199,063,000
Allied Power Management, LLC | Series A
Common unit, no par value (in dollars per unit) | $ / shares	0	0
Common unit, authorized (in units)	0	200,000,000
Common unit, issued (in units)	0	7,210,555
Common unit, outstanding (in units)	0	7,210,555
Allied Power Management, LLC | Series B
Common unit, no par value (in dollars per unit) | $ / shares	0	0
Common unit, authorized (in units)	0	100,000,000
Common unit, issued (in units)	0	2,437,855
Common unit, outstanding (in units)	0	2,437,855

Condensed Consolidated & Combin

Condensed Consolidated & Combined Statements of Income (Loss) (Unaudited) - USD ($) $ in Thousands	Jan. 12, 2017	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Revenue		$ 186,002	$ 118,911	$ 537,254	$ 252,280
Cost of sales		159,296	95,757	460,901	192,903
Gross profit		26,706	23,154	76,353	59,377
General and administrative expenses		32,625	19,942	65,944	33,921
Operating income (loss)		(5,919)	3,212	10,409	25,456
Interest expense		(17,034)	(1,549)	(26,708)	(4,332)
Income from equity method investment		786	184	2,072	660
Income (loss) before income taxes		(22,167)	1,847	(14,227)	21,784
Income tax expense (benefit)		(5,667)	0	(2,761)	0
Net income (loss)		(16,500)	1,847	(11,466)	21,784
Less income attributable to non-controlling interest		895	790	1,904	1,862
Net income (loss) attributable to Charah Solutions, Inc.		$ (17,395)	$ 1,057	$ (13,370)	$ 19,922
Basic earnings (losses) per share (in dollars per share)		$ (0.60)	$ 0.04	$ (0.52)	$ 0.84
Diluted earnings (losses) per share (in dollars per share)		$ (0.60)	$ 0.04	$ (0.52)	$ 0.81
Pro forma net income (loss) information (see Note 1):
Pro forma net income (loss) attributable to Charah Solutions, Inc.		$ (17,379)	$ 1,364	$ (12,568)	$ 20,443
Predecessor
Revenue	$ 9,130
Cost of sales	7,301
Gross profit	1,829
General and administrative expenses	3,170
Operating income (loss)	(1,341)
Interest expense	(4,181)
Income from equity method investment	48
Income (loss) before income taxes	(5,474)
Income tax expense (benefit)	0
Net income (loss)	(5,474)
Less income attributable to non-controlling interest	54
Net income (loss) attributable to Charah Solutions, Inc.	(5,528)
Pro forma net income (loss) information (see Note 1):
Pro forma net income (loss) attributable to Charah Solutions, Inc.	(5,447)
Pro Forma
Income tax expense (benefit)	(2,101)	(5,667)	402	(4,358)	7,570
Pro forma net income (loss) information (see Note 1):
Net income (loss) attributable to Charah Solutions, Inc. before provision for income taxes	(5,528)	(23,062)	1,057	(16,131)	19,922
Pro forma net income (loss) attributable to Charah Solutions, Inc.	$ (3,427)	$ (17,395)	$ 655	$ (11,773)	$ 12,352

Condensed Consolidated & Comb_2

Condensed Consolidated & Combined Statements of Stockholders' and Members' Equity (Unaudited) - USD ($) $ in Thousands	Total	Common Stock	Additional Paid In Capital	Retained Earnings	Parent	Non-Controlling Interest	Series A	Series AParent	Series B	Series BParent	Series A and B	Series A and BParent	Series C	Series CParent	Charah, LLC Members’ Interest	Charah, LLC Members’ InterestCommon Stock	Charah, LLC Members’ InterestRetained Earnings	Charah, LLC Members’ InterestParent	Charah, LLC Members’ InterestNon-voting SharesCommon Stock	Charah, LLC Members’ InterestNon-voting SharesAdditional Paid In Capital	Charah, LLC Members’ InterestSeries A	Charah, LLC Members’ InterestSeries B	Charah, LLC Members’ InterestSeries A and B	Charah, LLC Members’ InterestSeries C	Allied Power Management, LLC Members’ Interest	Allied Power Management, LLC Members’ InterestSeries A and B	Allied Power Management, LLC Members’ InterestSeries C
Balance beginning of period, Members' Equity (Predecessor) at Dec. 31, 2016	$ 21,346					$ 686										$ 24	$ 20,366	$ 20,660	$ 216	$ 54
Balance beginning of period (shares) (Predecessor) at Dec. 31, 2016																18,750			168,750
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss) | Predecessor	(5,474)					54											(5,528)	(5,528)
Distributions | Predecessor	(20,660)					0											(20,660)	(20,660)
Balance end of period, Members' Equity (Predecessor) at Jan. 12, 2017	(4,788)					740										$ 24	$ (5,822)	$ (5,528)	$ 216	$ 54
Balance end of period, Members' Equity at Jan. 12, 2017	740			$ 0	$ 0	740									$ 0										$ 0
Balance end of period (shares) (Predecessor) at Jan. 12, 2017																18,750			168,750
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	21,784			19,922	19,922	1,862
Issuance of original member interests							$ 116,418	$ 116,418	$ 36,643	$ 36,643	$ 9,982	$ 9,982									$ 116,418	$ 36,643	$ 486			$ 9,496
Distributions	(17,849)				(16,085)	(1,764)									(16,085)
Share based compensation expense											$ 2,080	$ 2,080	$ 264	$ 264									$ 1,945	$ 226		$ 135	$ 38
Balance end of period, Members' Equity at Sep. 30, 2017	170,062			19,922	169,224	838									139,633										9,669
Balance beginning of period, Stockholders' Equity at Dec. 31, 2017	$ 48,319	$ 0	$ 0	18,316	47,721	598									19,718										9,687
Balance beginning of period (shares) at Dec. 31, 2017	0	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	$ (11,466)			(13,370)	(13,370)	1,904
Share based compensation expense	214				214										214
Distributions	(2,312)				(686)	(1,626)									(686)
Conversion from members' interest to common stock (in shares)		23,436,398
Conversion from members' interest to common stock	0	$ 234	28,699												(19,246)										(9,687)
Issuance of shares (in shares)		5,294,117
Issuance of shares	59,241	$ 53	59,188		59,241
Share based common stock issued (in shares)		372,169
Share based common stock issued	0	$ 4	(4)
Shares repurchased (in shares)		(19,696)
Shares repurchased	0	$ 0	0		0
Share based compensation expense	2,235		2,235		2,235
Deferred offering costs	(8,916)		(8,916)		(8,916)
Balance end of period, Stockholders' Equity at Sep. 30, 2018	$ 87,315	$ 291	$ 81,202	$ 4,946	$ 86,439	$ 876									$ 0										$ 0
Balance end of period (shares) at Sep. 30, 2018	29,082,988	29,082,988

Condensed Consolidated & Comb_3

Condensed Consolidated & Combined Statements of Cash Flow (Unaudited) - USD ($) $ in Thousands	Jan. 12, 2017	Sep. 30, 2018	Sep. 30, 2017
Cash flows from operating activities:
Net income (loss)		$ (11,466)	$ 21,784
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Depreciation and amortization		33,898	19,601
Amortization of debt issuance costs		11,460	555
Deferred income tax benefit		(3,076)	0
Loss on sale of assets		749	458
Income from equity method investment		(2,072)	(660)
Distributions received from equity investment		1,689	933
Non-cash share-based compensation		2,449	2,344
Payment related to deferred stock plan		0	(18,888)
Gain on interest rate swap		(2,857)	0
Increase (decrease) in cash due to changes in:
Trade accounts receivable		(21,706)	(26,096)
Receivable from affiliates		(222)	(77)
Costs and estimated earnings in excess of billing		(54,590)	(6,501)
Inventory		(4,480)	(635)
Prepaid expenses and other current assets		(1,642)	(2,707)
Accounts payable		4,192	(135)
Billings in excess of costs and estimated earnings		(11,283)	11,813
Accrued payroll and bonuses		18,161	23,323
Asset retirement obligation		7,834	199
Accrued expenses		22,458	5,514
Net cash (used in) provided by operating activities		(10,504)	30,825
Cash flows from investing activities:
Proceeds from the sale of equipment		1,297	780
Purchases of property and equipment		(14,948)	(7,591)
Payments for business acquisitions, net of cash received		(19,983)	0
Purchase of intangible assets		(31)	0
Decrease in restricted cash		0	3,358
Net cash used in investing activities		(33,665)	(3,453)
Cash flows from financing activities:
Net proceeds (payments) on line of credit		5,106	(43,801)
Proceeds from long-term debt		214,330	153,578
Principal payments on long-term debt		(251,563)	(137,005)
Payments of offering costs		(8,916)	0
Proceeds from note payable to related party, net		0	25,230
Issuance of common stock		59,241	0
Distributions to non-controlling interest		(1,626)	(1,764)
Distributions to members		(686)	(16,085)
Net cash provided by (used in) financing activities		15,886	(19,847)
Net (decrease) increase in cash		(28,283)	7,525
Cash, beginning of period		32,264	1,046
Cash, end of period	$ 1,046	3,981	8,571
Supplemental disclosures of cash flow information:
Cash paid during the year for interest		19,244	5,959
Non-cash investing and financing transactions:
Purchase of equipment with seller provided financing		$ 13,441
Predecessor
Cash flows from operating activities:
Net income (loss)	(5,474)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Depreciation and amortization	763
Amortization of debt issuance costs	0
Deferred income tax benefit	0
Loss on sale of assets	123
Income from equity method investment	(48)
Distributions received from equity investment	0
Non-cash share-based compensation	0
Payment related to deferred stock plan	0
Gain on interest rate swap	0
Increase (decrease) in cash due to changes in:
Trade accounts receivable	(3,977)
Receivable from affiliates	0
Costs and estimated earnings in excess of billing	2,185
Inventory	278
Prepaid expenses and other current assets	71
Accounts payable	4,380
Billings in excess of costs and estimated earnings	6
Accrued payroll and bonuses	(318)
Asset retirement obligation	0
Accrued expenses	(2,407)
Net cash (used in) provided by operating activities	(4,418)
Cash flows from investing activities:
Proceeds from the sale of equipment	0
Purchases of property and equipment	0
Payments for business acquisitions, net of cash received	0
Purchase of intangible assets	0
Decrease in restricted cash	0
Net cash used in investing activities	0
Cash flows from financing activities:
Net proceeds (payments) on line of credit	4,605
Proceeds from long-term debt	298
Principal payments on long-term debt	(440)
Payments of offering costs	0
Proceeds from note payable to related party, net	0
Issuance of common stock	0
Distributions to non-controlling interest	0
Distributions to members	0
Net cash provided by (used in) financing activities	4,463
Net (decrease) increase in cash	45
Cash, beginning of period	1,001		$ 1,046
Cash, end of period	1,046
Supplemental disclosures of cash flow information:
Cash paid during the year for interest	104
Non-cash investing and financing transactions:
Loan to related party distributed	7,865
Receivables from affiliates distributed	883
Assets and liabilities related to un-acquired business distributed	$ 11,912
Charah Management LLC | Bernhard Capital Partners Management, LP (BCP)
Non-cash investing and financing transactions:
Equity method investment, ownership percentage	76.00%

Nature of Business and Basis of

Nature of Business and Basis of Presentation	9 Months Ended
	Sep. 30, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Nature of Business and Basis of Presentation	Nature of Business and Basis of Presentation Organization Charah Solutions, Inc. (“Charah Solutions” or the “Company”) was formed as a Delaware corporation in January 2018 and did not conduct any material business operations prior to the transactions described below other than certain activities related to the initial public offering (the “IPO”). The Company completed its IPO on June 18, 2018. Charah Solutions is a holding company, the sole material assets of which consist of membership interests in Charah Management LLC, a Delaware limited liability company (“Charah Management”), and Allied Power Holdings, LLC, a Delaware limited liability company (“Allied Power Holdings”). Through the Company’s ownership of Charah Management and Allied Power Holdings, the Company owns the outstanding equity interests in Charah, LLC, a Delaware limited liability company (“Charah”), and Allied Power Management, LLC, a Delaware limited liability company (“Allied”), the subsidiaries through which Charah Solutions operates its businesses. The historical financial data presented herein as of September 30, 2018 and for periods after the June 18, 2018 corporate reorganization is that of Charah and Allied on a consolidated basis, and on a combined basis for periods prior to the June 18, 2018 corporate reorganization described below. Allied was formed in May 2017 and did not commence operations until July 2017. Corporate Reorganization On June 18, 2018, pursuant to the terms of the reorganization transactions completed in connection with the IPO, (a) (i) Charah Holdings LP, a Delaware limited partnership (“Charah Holdings”) owned by Bernhard Capital Partners Management, LP and certain related affiliates (“BCP”), contributed all of its interests in Charah Management and Allied Power Holdings to the Company in exchange for 17,514,745 shares of common stock, (ii) CEP Holdings, Inc., a Delaware corporation owned by Charles Price and certain affiliates (“CEP Holdings”), contributed all of its interests in Charah Management and Allied Power Holdings to the Company in exchange for 4,605,465 shares of common stock, (iii) Charah Management Holdings LLC, a Delaware limited liability company (“Charah Management Holdings”), contributed all of its interests in Charah Management and Allied Power Holdings to the Company in exchange for 907,113 shares of common stock and (iv) Allied Management Holdings, LLC, a Delaware limited liability company (“Allied Management Holdings”), contributed all of its interests in Charah Management and Allied Power Holdings to the Company in exchange for 409,075 shares of common stock, (b) each of Charah Management Holdings and Allied Management Holdings distributed the shares of common stock received by them pursuant to clause (a) to their respective members in accordance with the respective terms of their limited liability company agreements and (c) Charah Holdings distributed a portion of the shares of common stock it received in clause (a) above to certain direct and indirect blocker entities which ultimately merged into the Company, with the Company surviving, and affiliates of BCP received shares of common stock as consideration in the mergers. Description of Business Operations The Company provides mission-critical environmental and maintenance services to the power generation industry, enabling our customers to address challenges related to the remediation of ash ponds and landfills at open and closed power plant sites while continuously operating and providing necessary electric power to communities nationwide. Services offered include a suite of coal ash management and recycling, environmental remediation and outage maintenance services. The Company also designs and implements solutions for complex environmental projects (such as coal ash pond closures) and facilitates coal ash recycling through byproduct sales and other beneficial use services. The Company has corporate offices in Kentucky, North Carolina, and Louisiana, and principally operates in the eastern and mid central United States. The condensed consolidated and combined financial statements include the assets, liabilities, members’ equity, and results of operations of the Company and its consolidated subsidiaries. References to “Predecessor” in the financial statements refer to Charah. Charah is the predecessor for accounting purposes of Charah Solutions, which as described above, was formed in connection with the IPO. Under the Jumpstart Our Business Startups Act (the "JOBS Act"), the Company meets the definition of an “emerging growth company,” which allows the Company to have an extended transition period for complying with new or revised accounting standards pursuant to Section 107(b) of the JOBS Act. The Company intends to take advantage of all of the reduced reporting requirements and exemptions, including the longer phase-in periods for the adoption of new or revised financial accounting standards under Section 107 of the JOBS Act until the Company is no longer an emerging growth company. Among other things, we are not required to provide an auditor attestation report on the assessment of the internal control over financial reporting under Section 404(b) of the Sarbanes-Oxley Act of 2002 and our disclosure obligations regarding executive compensation may be reduced. We may take advantage of these provisions until the last day of our fiscal year following the fifth anniversary of our initial public offering, or December 31, 2023. However, if certain events occur prior to the end of such five-year period, including if we become a "large accelerated filer," our annual gross revenue exceeds $1.07 billion or we issue more than $1.0 billion of non-convertible debt in any three-year period, we will cease to be an emerging growth company prior to the end of such five-year period. Basis for Presentation The Company’s fiscal year ends December 31. The accompanying unaudited condensed consolidated and combined financial statements include the accounts of the Company and its consolidated subsidiaries. Intercompany transactions and balances have been eliminated in consolidation. The accompanying unaudited condensed consolidated and combined financial statements have been prepared in accordance with rules and regulations of the Securities and Exchange Commission ("SEC") for quarterly reports on Form 10-Q. In the opinion of management, all adjustments considered necessary for a fair presentation have been included, which consist of normal recurring adjustments. Certain information and footnote disclosures normally included in the annual financial statements prepared in accordance with U.S. generally accepted accounting principles ("GAAP") have been condensed or omitted. These unaudited condensed consolidated and combined financial statements should be read in conjunction with the annual audited combined financial statements and notes included in our final prospectus filed on June 15, 2018. Recent Accounting Pronouncements In May 2014, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") 2014-09, Revenue from Contracts with Customers (Topic 606) , requiring an entity to recognize the amount of revenue to which it expects to be entitled for the transfer of promised goods or services to customers. The core principle of ASU 2014-09 is to recognize revenues when a customer obtains control of a good or service, in an amount that reflects the consideration to which an entity is expected to be entitled for those goods or services. Additionally, the ASU will require enhanced qualitative and quantitative disclosures regarding customer contracts. The standard will replace most existing revenue recognition guidance in GAAP when it becomes effective and permits the use of either a full retrospective or modified retrospective with cumulative effect transition method. In August 2015, the FASB issued ASU 2015-14, which deferred the effective date of ASU 2014-09 by one year. The updated standard will be effective for the year ending December 31, 2019. The Company is currently evaluating the effect that the new standard will have on the consolidated and combined financial statements. To assess the impact of the standard, we are utilizing internal resources to lead the implementation effort and supplement them with external resources. The Company’s adoption activities are being performed over three phases: (i) assessment, (ii) design, and (iii) implementation using a cross-functional team that includes accounting, operational and information technology personnel. Under ASU 2014-09, the Company’s contracts are being analyzed to determine whether the goods or services within each contract are distinct performance obligations. Based on our work to date, we believe we have identified all material contract types and revenues that may be impacted by the ASU. Generally, the Company believes the majority of its contracts will continue to be treated as a single unit of account because they contain only one performance obligation. The Environmental Solutions segment contains long term contracts where the identification of performance obligations may result in timing differences of revenue recognition and capitalization of costs, as compared to the Company’s current use of the percentage-of-completion method. The Company is in the process of analyzing the necessary changes to our systems, processes and internal controls in order to meet the ASU's revised reporting and disclosure requirements. The Company will adopt the new standard using the m odified r etrospective application. This standard could have a significant impact on the Company’s consolidated financial statements and an administrative impact on our operations. The impact will depend on the magnitude of the items discussed above. The Company will continue to evaluate the impact of the ASU through the implementation phase. In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842) , requiring all leases to be recognized on the balance sheet as a right-of-use asset and a lease liability, unless the lease is a short-term lease (generally a lease with a term of twelve months or less). At the commencement date of the lease, the Company will recognize: 1) a lease liability for Company’s obligation to make payments under the lease agreement, measured on a discounted basis; and 2) a right-of-use asset that represents the Company's right to use, or control the use of, the specified asset for the lease term. The ASU originally required recognition and measurement of leases at the beginning of the earliest period presented using a modified retrospective transition method. In July 2018, the FASB issued ASU 2018-11, which provided an additional (and optional) transition method that permits application of the updated standard at the adoption date with recognition of a cumulative-effect adjustment to the opening balance of retained earnings in the period of adoption. The updated standard will be effective for the Company for the year ending December 31, 2020, with early adoption permitted. The Company has not yet selected a transition method and is currently evaluating the effect that the new standard will have on its consolidated and combined financial statements. In August 2016, the FASB issued ASU 2016-15, Statement of Cash Flows: Classification of Certain Cash Receipts and Cash Payments . This update addresses specific cash flow issues, including debt prepayment or debt extinguishment costs, contingent consideration payments made after a business combination, and proceeds from the settlement of insurance claims. The guidance is effective for the Company for the year ending December 31, 2019. The Company is currently evaluating the effect that the new standard will have on the consolidated and combined financial statements. In November 2016, the FASB issued ASU 2016-18, Statement of Cash Flows (Topic 230) . This ASU requires that a statement of cash flows explain the change during the period in the total of cash, cash equivalents, and amounts generally described as restricted cash or restricted cash equivalents. Upon adopting the ASU, amounts generally described as restricted cash and restricted cash equivalents will be included with cash and cash equivalents when reconciling the beginning-of-period and end-of-period total amounts shown on the statement of cash flows. ASU 2016-18 will be effective for the Company for the year ending December 31, 2019, with early adoption permitted. The Company is currently evaluating the effect that the new standard will have on the consolidated and combined financial statements. In January 2017, the FASB issued ASU 2017-01, Business Combinations (Topic 805): Clarifying the Definition of a Business , which provides guidance to assist entities with evaluating whether transactions should be accounted for as acquisitions (or disposals) of assets or businesses. ASU 2017-01 requires entities to use a screen test to determine when an integrated set of assets and activities is not a business or if the integrated set of assets and activities needs to be further evaluated against the framework. The Company adopted the new standard effective January 1, 2018 on a prospective basis. The new standard did not have a material impact on our condensed consolidated financial statements. In January 2017, the FASB issued ASU 2017-04, Intangibles - Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment . The ASU simplifies the measurement of goodwill impairment by eliminating the requirement that an entity compute the implied fair value of goodwill based on the fair values of its assets and liabilities to measure impairment. Instead, goodwill impairment will be measured as the difference between the fair value of the reporting unit and the carrying value of the reporting unit. The ASU also clarifies the treatment of the income tax effect of tax-deductible goodwill when measuring goodwill impairment loss. The Company will be required to adopt ASU 2017-04 as of January 1, 2020. ASU 2017-04 must be applied prospectively, with early adoption permitted. The Company is currently evaluating the effect that the new standard will have on its consolidated and combined financial statements. In May 2017, the FASB issued ASU 2017-09, Compensation-Stock Compensation (Topic 718): Scope of Modification Accounting , to provide guidance about which changes to the terms or conditions of a share-based payment award require an entity to apply modification accounting in ASC 718. The Company adopted the new standard effective January 1, 2018 on a prospective basis. The new standard did not have a material impact on our condensed consolidated financial statements. Unaudited Pro Forma Income Information The unaudited pro forma income information gives effect to the corporate reorganization that occurred in connection with the closing of the IPO and the resulting legal entity of Charah Solutions, which is incorporated as a “C” Corporation. Prior to the corporate reorganization, the holding companies for Charah and Allied were limited liability companies and generally not subject to income taxes. The pro forma net income, therefore, includes an adjustment for income tax expense as if the holding companies for Charah and Allied had been “C” Corporations for all periods presented at an assumed combined federal, state and local effective income tax rate of 38% for the year ended December 31, 2017 and 25% for the periods from January 1, 2018 through June 17, 2018, plus the actual tax expense for the period from June 18, 2018 through September 30, 2018 . These rates approximate the calculated statutory tax rate for each period. The tax rate in the preceding sentence for the year ended December 31, 2017 does not reflect the impact of U.S. tax reform, which reduces the federal U.S. statutory tax rate from 35% to 21% , effective in 2018. The tax rates mentioned for the three and nine months ended September 30, 2018 reflect the impact of U.S. tax reform.

Business Combination

Business Combination	9 Months Ended
	Sep. 30, 2018
Business Combinations [Abstract]
Business Combination	Business Combination On January 13, 2017, Charah Management completed a transaction with BCP, a previously unrelated third party pursuant to which BCP acquired a 76% equity position in Charah Management. The acquisition was accounted for under the acquisition method of accounting in accordance with ASC Topic 805, Business Combinations . The purchase price was allocated to the assets acquired and liabilities assumed based on the estimated fair value at the date of acquisition, as summarized below. By the application of “push-down” accounting, Charah’s assets and liabilities were accordingly adjusted to fair value. Net working capital $ 26,704 Net operating assets/liabilities 9,679 Property, plant and equipment 107,876 Rail easement 110 Purchase option liability (29,883 ) Trade name intangible assets 34,330 Customer relationship intangible assets 78,200 Goodwill 73,468 Total purchase price $ 300,484 On March 30, 2018, Charah Management completed a transaction with SCB Materials International, Inc. and affiliated entities ("SCB"), a previously unrelated third party, pursuant to which Charah acquired certain assets and liabilities of SCB for a purchase price of $35,000 , with $20,000 paid at closing and $15,000 to be paid over time in conjunction with certain performance metrics. The contract also contained various mechanisms for a working capital true-up. The acquisition was accounted for under the acquisition method of accounting in accordance with ASC 805, Business Combinations . As of September 30, 2018 , the allocation of purchase price for the acquisition is preliminary (as summarized below); fair value estimates of identifiable assets acquired and liabilities assumed are based on management’s estimates, judgments and assumptions and are subject to change until finalized. Goodwill, if any, will be allocated to the Environmental Solutions segment. The total amount of goodwill that is expected to be deductible for tax purposes is $1,180 . In November 2018, the $15,000 to be paid over time was reduced by $2,963 . The allocation of purchase price for the acquisition has been reflected in the table above on a preliminary basis and will be updated in conjunction with this reduction in purchase price during the three months ended December 31, 2018. Cash acquired $ 17 Net working capital, excluding cash 21,185 Property, plant and equipment 5,300 Trade name intangible assets 633 Customer relationship intangible assets 1,427 Technology 2,102 Non-compete and other agreements 1,373 Total purchase price $ 32,037 No revenue or earnings from the acquired business described above is included in the Statements of Income (Loss) for the 2017 periods. The actual revenue from the acquired business included in the Statements of Income (Loss) for the three and nine months ended September 30, 2018 was approximately $14,890 and $31,463 , respectively. The actual earnings from the acquired business included in the Statements of Income (Loss) for the three and nine months ended September 30, 2018 was approximately $368 and $1,322 , respectively. The following unaudited information presents the pro forma consolidated revenue and net income for the periods indicated as if the acquisition had been included in the consolidated results of operations beginning January 1, 2017. Successor Predecessor Three Months Ended September 30, 2018 Three Months Ended September 30, 2017 Nine Months Ended September 30, 2018 Period from January 13, 2017 through September 30, 2017 Period from January 1, 2017 through January 12, 2017 Pro forma revenue $ 186,002 $ 138,993 $ 554,077 $ 305,998 $ 11,158 Pro forma net income (loss) attributable to Charah Solutions, Inc. (17,379 ) 1,364 (12,568 ) 20,443 (5,447 ) The above unaudited pro forma results have been calculated by combining the historical results of the Company and the acquired business as if the acquisition had occurred as of the beginning of the fiscal year prior to the acquisition date, and then adjusting the income tax provisions as if they had been calculated on the resulting, combined results. The pro forma results include estimates for additional depreciation related to the fair value of property, plant and equipment and intangible asset amortization and therefore will change when the final asset values and useful lives have been determined. The pro forma results reflect elimination of $589 of direct acquisition costs that were incurred in the nine months ended September 30, 2018 (since for purposes of the pro forma presentation they have been reflected in 2017 instead of in 2018). For all periods presented, historical depreciation and amortization expense of the acquired business was adjusted to reflect the acquisition date fair value amounts of the related tangible and intangible assets. No other material pro forma adjustments were deemed necessary, either to conform the acquisition to the Company’s accounting policies or for any other situation. The pro forma information is not necessarily indicative of the results that would have been achieved had the transactions occurred on the date indicated or that may be achieved in the future.

Equity Method Investments

Equity Method Investments	9 Months Ended
	Sep. 30, 2018
Equity Method Investments and Joint Ventures [Abstract]
Equity Method Investments	Equity Method Investments Charah has an investment in a company that provides ash management and remarketing services to the electric utility industry. Charah accounts for its investment under the equity method of accounting because Charah has significant influence over the financial and operating policies of the company. Charah had a receivable due from the equity method investment of $146 and $61 at September 30, 2018 and December 31, 2017 , respectively. Summarized balance sheet information of our equity method investment entity as of: September 30, December 31, Current assets $ 2,943 $ 1,946 Noncurrent assets 763 764 Total assets $ 3,706 $ 2,710 Current liabilities 529 298 Equity of Charah 5,389 5,006 Equity of joint venture partner (2,212 ) (2,594 ) Total liabilities and members' equity $ 3,706 $ 2,710 Summarized financial performance of our equity method investment entity is as follows: Successor Predecessor Three Months Ended September 30, 2018 Three Months Ended September 30, 2017 Nine Months Ended September 30, 2018 Period from January 13, 2017 through September 30, 2017 Period from January 1 2017, through January 12, 2017 Operating Data Revenues $ 3,409 $ 2,151 $ 8,438 $ 5,922 $ 300 Net income $ 1,572 $ 367 $ 4,144 $ 1,320 $ 96 The Company’s share of net income $ 786 $ 184 $ 2,072 $ 660 $ 48 The following table reflects our proportional ownership activity in our investment account: Successor Predecessor Three Months Ended September 30, 2018 Three Months Ended September 30, 2017 Nine Months Ended September 30, 2018 Period from January 13, 2017 through September 30, 2017 Period from January 1 2017, through January 12, 2017 Opening balance $ 5,354 $ 5,115 $ 5,006 $ 5,289 $ 5,241 Distributions (751 ) (283 ) (1,689 ) (933 ) — Share of net income 786 184 2,072 660 48 Closing balance $ 5,389 $ 5,016 $ 5,389 $ 5,016 $ 5,289

Intangible Assets

Intangible Assets	9 Months Ended
	Sep. 30, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
Intangible Assets	Intangible Assets The Company’s intangible assets consist of the following as of: September 30, 2018 Gross Carrying Amount Accumulated Amortization Net Customer relationships $ 78,200 $ 13,033 $ 65,167 Other - Rail easement 110 41 69 Trade name (indefinite lived) 34,330 — 34,330 Goodwill 73,468 — 73,468 186,108 13,074 173,034 Other - Patents acquired (Note 2) 2,133 107 2,026 Non-compete and other agreements acquired (Note 2) 1,373 108 1,265 Customer relationships acquired (Note 2) 1,427 71 1,356 Trade name acquired (Note 2) 633 63 570 Closing balance $ 191,674 $ 13,423 $ 178,251 December 31, 2017 Gross Carrying Amount Accumulated Amortization Net Customer relationships $ 78,200 $ 7,168 $ 71,032 Rail easement 110 23 87 Trade name (indefinite lived) 34,330 — 34,330 Goodwill 73,468 — 73,468 Closing balance $ 186,108 $ 7,191 $ 178,917 Definite Lived Intangible Assets As of September 30, 2018 , and December 31, 2017 , definite lived intangible assets include customer relationships, patents, non-compete and licensing agreements, trade name, and a rail easement. These assets are amortized on a straight-line basis over their estimated useful lives as shown in the table below. Amortization expense was $2,135 , $1,961 , $6,232 , $5,230 and $0 during the three months ended September 30, 2018 (Successor), the three months ended September 30, 2017 (Successor), the nine months ended September 30, 2018 (Successor), the period from January 13, 2017 through September 30, 2017 (Successor) and the period from January 1, 2017 through January 12, 2017 (Predecessor), respectively. Definite Lived Intangible Useful Life Customer relationships 10 years Patents 10 years Non-compete agreement 2 years Licensing agreements 15 years Trade name 5 years Rail easement 4.5 years Goodwill and Indefinite Lived Intangible Assets Goodwill represents the excess of the cost of an acquisition price over the fair value of acquired net assets, and such amounts are reported separately as goodwill on our condensed consolidated and combined balance sheets. Indefinite lived intangible assets are not amortized, but instead are tested for impairment annually or on an interim basis if events or circumstances indicate that the fair value of the asset has decreased below its carrying value. We perform our impairment test effective October 31st of each year. Each quarter we evaluate if there are any indicators of impairment, and we determined there were no indicators of impairment at September 30, 2018 and 2017 .

Credit Agreement

Credit Agreement	9 Months Ended
	Sep. 30, 2018
Debt Disclosure [Abstract]
Credit Agreement	Credit Agreement The Company had a credit agreement with a bank providing for a revolving credit facility (the “Credit Facility”) with a principal amount of up to $45,000 . The interest rates per annum applicable to the loans under the Credit Facility were based on a fluctuating rate of interest measured by reference to, at the Company’s election, either (1) an adjusted London Inter-Bank Offered Rate ("LIBOR") plus a 2.00% borrowing margin, or (2) an alternative base rate plus a 1.00% borrowing margin. Customary fees were payable in respect of the Credit Facility and included (1) commitment fees in an annual amount equal to 0.50% of the daily unused portions of the Credit Facility, and (2) a 2.00% fee on outstanding letters of credit. The Credit Facility had a maturity date of October 25, 2022. There were no amounts drawn on the revolving credit facility as of December 31, 2017 . The Credit Facility was terminated in September 2018 and all amounts outstanding were repaid. In September 2018, the Company entered into a new syndicated credit agreement (the “Syndicated Credit Facility”) that includes a revolving loan not to exceed $50,000 , a term loan of $205,000 (see also Note 6), and a commitment to loan up to $25,000 that expires in March 2020. All amounts loaned under the Syndicated Credit Facility mature in September 2023. The interest rates per annum applicable to the loans under the Syndicated Credit Facility are based on a fluctuating rate of interest measured by reference to, at the Company’s election, either (1) the LIBOR rate, or (2) an alternative base rate. Various margins are added to the interest rate selected by the Company based upon the Company’s consolidated net leverage ratio. Customary fees are payable in respect of the Syndicated Credit Facility and include (1) commitment fees ( 0.25% to 0.35% ) for unused portions of the Syndicated Credit Facility, and (2) fees on outstanding letters of credit ( 1.30% to 2.10% ). The loans are secured by essentially all assets of the Company. The loans are subject to certain financial covenants. The revolving loan provides a principal amount of up to $50,000 , reduced by outstanding letters of credit ( $12,531 outstanding as of September 30, 2018). As of September 30, 2018, $5,106 was outstanding on the revolving loan. Notes Payable The following table summarizes the major components of debt at each balance sheet date and provides maturities and interest rate ranges for each major category as of September 30, 2018 : September 30, December 31, 2017 Various equipment notes entered into in November 2017, payable in monthly installments ranging from $5 to $24 including interest at 5.2%, maturing in December 2022 through December 2023. The notes are secured by equipment with a net book value of $4,824 as of September 30, 2018 (Successor). $ 5,185 $ 5,910 Various equipment notes entered into in 2018, payable in monthly installments ranging from $6 to $38 including interest ranging from 5.90% to 6.80%, maturing in March 2023 through May 2025. The notes are secured by equipment with a net book value of $12,297 as of September 30, 2018 (Successor). 12,704 — In June 2018, the Company entered into a $12,000 convertible non-revolving credit note with a bank. The credit note will convert to a term loan on April 10, 2019, with a maturity date of April 10, 2024. Interest on borrowings prior to the conversion date is calculated using a floating rate equal to 2% in excess of LIBOR. At the conversion date, interest can be either calculated based on the aforementioned rate or at a fixed rate equal to 2% in excess of the 5-year Swap Rate in effect at the conversion date, based on the Company's preference. 5,896 — A $10,000 equipment line with a bank, entered into during December 2017, secured by all equipment purchased with the proceeds of the loan. Interest is calculated on any outstanding amounts using a fixed rate of 4.5%. The equipment line converted to a term loan in September 2018, with a maturity date of June 22, 2023. The note is secured by equipment with a net book value of $9,462 as of September 30, 2018 (Successor). 10,000 3,244 A credit agreement with a bank, entered into during October 2017, providing for a senior secured term loan B facility with an initial commitment of $250,000 (the Term Loan). The interest rates per annum applicable to the loans under the Term Loan were based on a fluctuating rate of interest measured by reference to, at the Company's election, either (1) LIBOR plus a 6.25% borrowing margin, or (2) an alternative base rate plus a 5.25% borrowing margin. The principal amount of the Term Loan amortized at a rate of 7.5% per annum with all remaining outstanding amounts under the Term Loan due on the Term Loan maturity date. A portion of the IPO proceeds was used to prepay scheduled principal payments which would otherwise have been required through June 2020. The Term Loan had a scheduled maturity date of October 25, 2024. The Term Loan was secured by substantially all the assets of the Company and was subject to certain financial covenants. The loan was repaid in full in September 2018. — 250,000 A term loan entered into in September 2018 as part of the Syndicated Credit Facility (see also Note 5). The interest rate applicable to the term loan is based on a fluctuating rate of interest measured by reference to, at the Company’s election, either (1) the LIBOR rate, or (2) an alternative base rate (see also Note 5). Principal payments of $2,563 are required quarterly through September 2020, $3,844 through September 2022, and $5,125 through September 2023. The remaining outstanding amounts will be due in September 2023. The loan is secured by substantially all the assets of the Company. The loan is subject to certain financial covenants. 205,000 — Total 238,785 259,154 Less debt issuance costs (3,423 ) (11,460 ) 235,362 247,694 Less current maturities (20,766 ) (19,996 ) Notes payable due after one year $ 214,596 $ 227,698 Included in interest expense in the condensed consolidated statements of income for the three and nine months ended September 30, 2018 was $12.5 million of costs incurred in conjunction with the refinance of our term loan, consisting of a $10.4 million non-cash write-off of debt issue costs and a $2.1 million prepayment penalty.

Notes Payable

Notes Payable	9 Months Ended
	Sep. 30, 2018
Debt Disclosure [Abstract]
Notes Payable	Credit Agreement The Company had a credit agreement with a bank providing for a revolving credit facility (the “Credit Facility”) with a principal amount of up to $45,000 . The interest rates per annum applicable to the loans under the Credit Facility were based on a fluctuating rate of interest measured by reference to, at the Company’s election, either (1) an adjusted London Inter-Bank Offered Rate ("LIBOR") plus a 2.00% borrowing margin, or (2) an alternative base rate plus a 1.00% borrowing margin. Customary fees were payable in respect of the Credit Facility and included (1) commitment fees in an annual amount equal to 0.50% of the daily unused portions of the Credit Facility, and (2) a 2.00% fee on outstanding letters of credit. The Credit Facility had a maturity date of October 25, 2022. There were no amounts drawn on the revolving credit facility as of December 31, 2017 . The Credit Facility was terminated in September 2018 and all amounts outstanding were repaid. In September 2018, the Company entered into a new syndicated credit agreement (the “Syndicated Credit Facility”) that includes a revolving loan not to exceed $50,000 , a term loan of $205,000 (see also Note 6), and a commitment to loan up to $25,000 that expires in March 2020. All amounts loaned under the Syndicated Credit Facility mature in September 2023. The interest rates per annum applicable to the loans under the Syndicated Credit Facility are based on a fluctuating rate of interest measured by reference to, at the Company’s election, either (1) the LIBOR rate, or (2) an alternative base rate. Various margins are added to the interest rate selected by the Company based upon the Company’s consolidated net leverage ratio. Customary fees are payable in respect of the Syndicated Credit Facility and include (1) commitment fees ( 0.25% to 0.35% ) for unused portions of the Syndicated Credit Facility, and (2) fees on outstanding letters of credit ( 1.30% to 2.10% ). The loans are secured by essentially all assets of the Company. The loans are subject to certain financial covenants. The revolving loan provides a principal amount of up to $50,000 , reduced by outstanding letters of credit ( $12,531 outstanding as of September 30, 2018). As of September 30, 2018, $5,106 was outstanding on the revolving loan. Notes Payable The following table summarizes the major components of debt at each balance sheet date and provides maturities and interest rate ranges for each major category as of September 30, 2018 : September 30, December 31, 2017 Various equipment notes entered into in November 2017, payable in monthly installments ranging from $5 to $24 including interest at 5.2%, maturing in December 2022 through December 2023. The notes are secured by equipment with a net book value of $4,824 as of September 30, 2018 (Successor). $ 5,185 $ 5,910 Various equipment notes entered into in 2018, payable in monthly installments ranging from $6 to $38 including interest ranging from 5.90% to 6.80%, maturing in March 2023 through May 2025. The notes are secured by equipment with a net book value of $12,297 as of September 30, 2018 (Successor). 12,704 — In June 2018, the Company entered into a $12,000 convertible non-revolving credit note with a bank. The credit note will convert to a term loan on April 10, 2019, with a maturity date of April 10, 2024. Interest on borrowings prior to the conversion date is calculated using a floating rate equal to 2% in excess of LIBOR. At the conversion date, interest can be either calculated based on the aforementioned rate or at a fixed rate equal to 2% in excess of the 5-year Swap Rate in effect at the conversion date, based on the Company's preference. 5,896 — A $10,000 equipment line with a bank, entered into during December 2017, secured by all equipment purchased with the proceeds of the loan. Interest is calculated on any outstanding amounts using a fixed rate of 4.5%. The equipment line converted to a term loan in September 2018, with a maturity date of June 22, 2023. The note is secured by equipment with a net book value of $9,462 as of September 30, 2018 (Successor). 10,000 3,244 A credit agreement with a bank, entered into during October 2017, providing for a senior secured term loan B facility with an initial commitment of $250,000 (the Term Loan). The interest rates per annum applicable to the loans under the Term Loan were based on a fluctuating rate of interest measured by reference to, at the Company's election, either (1) LIBOR plus a 6.25% borrowing margin, or (2) an alternative base rate plus a 5.25% borrowing margin. The principal amount of the Term Loan amortized at a rate of 7.5% per annum with all remaining outstanding amounts under the Term Loan due on the Term Loan maturity date. A portion of the IPO proceeds was used to prepay scheduled principal payments which would otherwise have been required through June 2020. The Term Loan had a scheduled maturity date of October 25, 2024. The Term Loan was secured by substantially all the assets of the Company and was subject to certain financial covenants. The loan was repaid in full in September 2018. — 250,000 A term loan entered into in September 2018 as part of the Syndicated Credit Facility (see also Note 5). The interest rate applicable to the term loan is based on a fluctuating rate of interest measured by reference to, at the Company’s election, either (1) the LIBOR rate, or (2) an alternative base rate (see also Note 5). Principal payments of $2,563 are required quarterly through September 2020, $3,844 through September 2022, and $5,125 through September 2023. The remaining outstanding amounts will be due in September 2023. The loan is secured by substantially all the assets of the Company. The loan is subject to certain financial covenants. 205,000 — Total 238,785 259,154 Less debt issuance costs (3,423 ) (11,460 ) 235,362 247,694 Less current maturities (20,766 ) (19,996 ) Notes payable due after one year $ 214,596 $ 227,698 Included in interest expense in the condensed consolidated statements of income for the three and nine months ended September 30, 2018 was $12.5 million of costs incurred in conjunction with the refinance of our term loan, consisting of a $10.4 million non-cash write-off of debt issue costs and a $2.1 million prepayment penalty.

Interest Rate Swap

Interest Rate Swap	9 Months Ended
	Sep. 30, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Interest Rate Swap	Interest Rate Swap In order to manage interest rate risk in a cost-efficient manner, the Company entered into an interest rate swap during 2017 whereby the Company agreed to exchange with the counterparty, at specified intervals, the difference between fixed and variable interest amounts calculated by reference to a notional amount. The interest rate swap is not designated for hedge accounting. The change in fair values of the interest rate swap are immediately recognized in earnings, within interest expense. As of both September 30, 2018 and December 31, 2017 , the notional amount of the interest rate swap was $150,000 . A fair value asset of $2,659 was recorded in the condensed consolidated balance sheet within other assets as of September 30, 2018 (Successor) and a fair value liability of $198 was recorded in the balance sheet within other liabilities as of December 31, 2017 (Successor). The total amount of gain subtracted from interest expense for the three months ended September 30, 2018 (Successor), the three months ended September 30, 2017 (Successor), the nine months ended September 30, 2018 (Successor), the period from January 13, 2017 through September 30, 2017 (Successor), and the period from January 1, 2017 through January 12, 2017 (Predecessor) was $629 , $0 , $2,857 , $0 and $0 respectively.

Costs and Estimated Earnings on

Costs and Estimated Earnings on Uncompleted Contracts	9 Months Ended
	Sep. 30, 2018
Revenue Recognition and Deferred Revenue [Abstract]
Costs and Estimated Earnings on Uncompleted Contracts	Costs and Estimated Earnings on Uncompleted Contracts Costs and estimated earnings on uncompleted contracts as of: September 30, December 31, Costs incurred on uncompleted contracts $ 252,166 $ 151,963 Estimated earnings 82,260 53,356 Total costs and earnings 334,426 205,319 Less billings to date (276,476 ) (213,242 ) Costs and estimated earnings in excess of billings $ 57,950 $ (7,923 ) The net balance in process is classified on the condensed consolidated and combined balance sheets as of: September 30, December 31, Costs and estimated earnings in excess of billings $ 62,549 $ 7,959 Billings in excess of costs and estimated earnings (4,599 ) (15,882 ) Net balance in process $ 57,950 $ (7,923 )

Distributions to Stockholder an

Distributions to Stockholder and Members	9 Months Ended
	Sep. 30, 2018
Equity [Abstract]
Distributions to Stockholder and Members	Distributions to Stockholders and Members Prior to the Company's June 18, 2018 corporate reorganization, the Company made certain distributions to stockholders and members to cover their tax liabilities. During the three months ended September 30, 2018 (Successor), the three months ended September 30, 2017 (Successor), the nine months ended September 30, 2018 (Successor), the period from January 13, 2017 through September 30, 2017 (Successor), and the period from January 1, 2017 through January 12, 2017 (Predecessor), the Company made distributions of $0 , $587 , $686 , $16,085 and $20,660 , respectively, a portion of which was used to pay for income taxes.

Stock_Unit Based Compensation

Stock/Unit Based Compensation	9 Months Ended
	Sep. 30, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock/Unit Based Compensation	Stock/Unit Based Compensation The Charah Management LLC Limited Liability Agreement provided for the issuance of up to 1,000 Series C interests ("Charah Series C Profits Interests"). In 2017, Charah Management adopted the Charah Series C Profits Interest Plan and issued 650 of such units to employees. Charah Series C Profits Interests participated in distributions to Charah members based on specified rates of return being realized to the Charah Series A and Charah Series B membership interest. The Charah Series C Profits Interest Plan is no longer in place following our corporate reorganization and related IPO. Charah Series C Profits Interests vested ratably in each of the first five anniversaries of their grant date with vesting accelerated upon a change of control. There were 540 Charah Series C Profits Interests unvested at June 18, 2018 and were canceled as a result of the corporate reorganization that occurred upon the closing of the IPO (see further discussion below). The Charah Series C Profits Interests were valued based upon a contingent claims analysis to allocate the total implied equity value as of the valuation date amongst the various equity securities classes, with breakpoints estimated considering relative seniority, liquidation preferences, and conversion features. An assumed volatility of 30% based upon a comparable public company analysis was used in the determination of fair value. The weighted–average grant date fair value of the Charah Series C Profits Interest granted during 2017 was $3,198 per unit, resulting in $2,100 of total compensation costs, which was expected to vest over 5 years . During the three months ended September 30, 2018 (Successor) and 2017 (Successor), $0 and $85 , respectively, of compensation expense was recognized related to the Charah Series C Profits interests. During the nine months ended September 30, 2018 (Successor), the period from January 13, 2017 through September 30, 2017 (Successor) and the period from January 1, 2017 through January 12, 2017 (Predecessor) compensation expense of $214 , $226 and $0 , respectively, was recognized related to the Charah Series C Profits Interests. The Allied Power Management LLC Limited Liability Agreement provided for the issuance of up to 1,000 Allied Series C profits interests (“Allied Series C Profits Interests”). In 2017, Allied adopted the Allied Series C Profits Interest Plan and issued 550 of such units to employees. The Allied Series C Profits Interest Plan is no longer in place following our corporate reorganization and related IPO. Allied Series C Profits Interests participated in distributions to Allied members based upon specified rates of return being realized to the Allied Series A and Allied Series B membership interest. Allied Series C Profits Interests vested immediately upon grant. The Allied Series C Profits Interests were valued based upon a contingent claims analysis to allocate the total implied equity value as of the valuation date amongst the various equity securities classes, with breakpoints estimated considering relative seniority, liquidation preferences, and conversion features. An assumed volatility of 32.5% based upon a comparable public company analysis was used in the determination of fair value. The average grant date fair value of the Allied Series C Profits Interest granted during 2017 was $69 per unit. No compensation expense was recognized during the three and nine months ended September 30, 2018 (Successor). For both the three months ended September 30, 2017 (Successor) and the period from January 13, 2017 through September 30, 2017 (Successor), $38 of compensation expense was recognized. No compensation expense was recognized during the period from January 1, 2017 through January 12, 2017 (Predecessor) related to Allied Series C Profits Interests. In conjunction with the funding of the investment in Allied Power Holdings in July 2017, select individuals, including members of the management team at Allied, were given the opportunity to invest in, via an aggregator entity, Allied Management Holdings, alongside, and on the same basis as, the existing investment group. In exchange for their investment, common equity interests (Series B) in both Allied Power Holdings and Charah Management were issued. For those members of management, 1.9 million Charah Management LLC Series B Membership Interests and 0.1 million Allied Power Management LLC Series B Membership Interests were granted as a deemed contribution and a portion was invested via a cash contribution. All rights under these membership interests were fully vested at the time of the grant. There was $2,080 of compensation expense recorded in the three months ended September 30, 2017 (Successor) and the period from January 13, 2017 through September 30, 2017 (Successor) related to these Series B membership interest grants. No compensation expense was recognized during the three and nine months ended September 30, 2018 (Successor) and the period from January 1, 2017 through January 12, 2017 (Predecessor). In connection with the corporate reorganization that occurred upon the closing of the IPO, the holders of Charah Series C Profits Interests and Allied Series C Profits Interests received 1,215,956 shares of common stock (the “Management Reorganization Consideration”) in exchange for the contribution to the Company of their Charah Series C Profits Interests and Allied Series C Profits Interests, 911,963 of the shares are subject to time based vesting conditions, as well as performance vesting conditions, based on specified EBITDA targets and achievement of certain safety metrics, which will be determined at a future date. In addition, 272,708 shares of common stock were issued under the 2018 Omnibus Incentive Plan (see further discussion below), of which 204,532 shares are subject to the same time-based vesting conditions and performance vesting conditions as the shares issued in accordance with the Management Reorganization Consideration. The fair value of the awards was calculated initially as $12 per share, and will be updated thereafter for changes at each reporting period until the performance targets are approved by the board of directors. The fair value of the awards is recognized over the required service period for each grant. Upon the closing of the IPO, the board of directors of the Company adopted the 2018 Omnibus Incentive Plan (the “2018 Plan”), pursuant to which employees, consultants and directors of the Company and its affiliates, including named executive officers, are eligible to receive awards. The 2018 Plan provides for the grant of stock options, stock appreciation rights, restricted stock, restricted stock units, bonus stock, dividend equivalents, other stock-based awards, substitute awards, annual incentive awards and performance awards intended to align the interests of participants with those of Company stockholders. The Company has reserved 3,006,582 shares of common stock for issuance under the 2018 Plan, and all future equity awards described above will be issued pursuant to the 2018 Plan. In June 2018, the Company issued 44,198 shares under the 2018 Plan that vest over one year. The fair value of the awards was calculated as $12 per share, which will be recognized over the one-year vesting period. In August 2018, the Company issued 45,004 shares under the 2018 Plan that vest over one year. The fair value of the awards was calculated as $7.67 per share, which will be recognized over the one -year vesting period. During the three and nine months ended September 30, 2018 (Successor), $1,046 and $2,235 , respectively, of compensation expense was recognized related to the shares issued in accordance with the Management Reorganization Consideration and the 2018 Plan. As of September 30, 2018 , there was approximately $3,483 of total compensation expense, subject to changes in fair value as the performance targets are approved by the board of directors, related to unvested awards not yet recognized, which will be recognized in future periods in accordance with applicable vesting terms.

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
	Sep. 30, 2018
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies In July 2017, APTIM Corp. sued Allied and certain of its employees and affiliated entities in the U.S. District Court for the Northern District of Illinois, alleging, among other things, misappropriation of alleged trade secrets and civil conspiracy. APTIM also alleged tortious interference with their contractual and business relations because Exelon, our customer whose business makes up 100% of our nuclear services revenues, ended their business relationship with APTIM and started a new business relationship with Allied. The litigation was indefinitely stayed on June 21, 2018 pending resolution of the arbitration discussed in the next paragraph which has overlapping issues with this litigation. The parties were engaged in discovery relevant to APTIM's motion for preliminary injunction, which was filed last July, before the stay was entered. APTIM has an unspecified claim for damages that may proceed if the stay is lifted. No schedule for that phase of the case, and no trial date, has been set. APTIM has not identified its alleged damages. APTIM and its alleged predecessors in interest have also initiated judicial and arbitral proceedings in Louisiana against Dorsey Ron McCall, our Senior Vice President and Board Member. In June 2017, APTIM’s alleged predecessor, The Shaw Group, Inc., sued Mr. McCall in Louisiana state court, alleging breaches of his employment agreement. APTIM later filed a petition in the U.S. District Court for the Eastern District of Louisiana seeking to stay the state-court litigation and compel arbitration of the breach-of-contract claims, which the district court granted, permitting APTIM’s pending arbitration against Mr. McCall to proceed. Mr. McCall appealed that decision to the U.S. Court of Appeals for the Fifth Circuit, which affirmed the district court’s order. Mr. McCall filed a petition for rehearing en banc on May 1, 2018 and the Fifth Circuit directed APTIM to file a response to the petition by May 24, 2018. On May 31, 2018, the Fifth Circuit denied Mr. McCall’s petition. The matter has now proceeded to arbitration which has been set for March 11-22, 2019. McCall and APTIM each filed motions to dismiss certain claims asserted by the other. Each of those motions were denied on September 24, 2018 and October 24, 2018, respectively. The Company recently received an offer from APTIM to settle outstanding litigation, and is reviewing that proposal along with its insurance carrier. We are party to a lawsuit filed against North Carolina by a certain environmental advocacy group alleging that the issuance by the state of certain permits associated with our Brickhaven clay mine reclamation site exceeded the state’s power. Although the state’s authority to issue the bulk of the permits (i.e. the allowance to reclaim the original site with coal ash) was upheld, the portion of the permits that allows us to “cut and prepare” an additional portion of the site was held by the North Carolina Superior Court to exceed the relevant agency’s statutory authority. The North Carolina Superior Court’s decision was reversed and remanded back to the North Carolina Office of Administrative Hearing (“OAH”). If the OAH determines North Carolina exceeded its permitting authority with respect to either the original allowance or the “cut and prepare” portions of the permits or both, such decision, if ultimately upheld, could have an adverse effect on our operations and financial results. Allied, and its affiliate, Allied Power Resources, LLC, have been named in a collective action lawsuit filed in the U.S. District Court for the Northern District of Illinois, alleging violations of the Fair Labor Standards Act, and which includes related class claims alleging violations of the Illinois Minimum Wage Law and Pennsylvania Minimum Wage Act for failure to pay overtime. This case is one of a series filed against companies in the oil, gas, and energy industries in Illinois and Texas. The Plaintiffs have an unspecified claim for damages. The collective action class claims have not been certified and the case is currently stayed pending a mediation that is currently set for November 26, 2018. In addition to the above matters, we are from time to time party to various lawsuits, claims and other legal proceedings arising in the ordinary course of our business. While the outcome of such proceedings cannot be predicted with certainty, we do not expect them to have a material adverse impact on the Company. Included in general and administrative expense in the condensed consolidated statement of income for the quarter ended September 30, 2018, and in accrued liabilities in the condensed consolidated balance sheet as of September 30, 2018, was approximately $20.0 million in accruals related to outstanding legal matters. We believe that the amounts accrued are sufficient to cover any liabilities arising from the proceedings with APTIM and all other outstanding legal claims. Except as reflected in such accruals, we are currently unable to estimate a range of reasonably possible loss, or a range of reasonably possible loss in excess of the amount accrued, for outstanding legal matters.

Business Segment and Related In

Business Segment and Related Information	9 Months Ended
	Sep. 30, 2018
Segment Reporting [Abstract]
Business Segment and Related Information	Business Segment and Related Information The Company has identified the following reportable segments, Environmental Solutions and Maintenance & Technical Services, as each met the quantitative threshold of generating revenues equal to or greater than 10 percent of the combined revenue of all operating segments. Management evaluates the performance of each segment based on segment gross profit, which is calculated as revenues less cost of sales. For the three months ended September 30, 2018 (Successor), the three months ended September 30, 2017 (Successor), the nine months ended September 30, 2018 (Successor), the period from January 13, 2017 through September 30, 2017 (Successor) and the period January 1, 2017 through January 12, 2017 (Predecessor), there are no intersegment revenues or other intersegment transactions. Segment assets are also evaluated by management based on each segment’s investment in property and equipment. Assets (other than property and equipment and goodwill) are not allocated to segments. Summarized financial information with respect to the reportable segments is as follows: Successor Three Months Ended September 30, 2018 ES M&TS All Other Total Revenue $ 103,848 $ 82,154 $ — $ 186,002 Segment gross profit 19,852 6,854 — 26,706 Segment depreciation and amortization expense 13,050 1,720 1,993 16,763 Three Months Ended September 30, 2017 ES M&TS All Other Total Revenue $ 65,930 $ 52,981 $ — $ 118,911 Segment gross profit 18,683 4,471 — 23,154 Segment depreciation and amortization expense 6,128 624 50 6,802 Nine Months Ended September 30, 2018 ES M&TS All Other Total Revenue $ 241,745 $ 295,509 $ — $ 537,254 Segment gross profit 54,417 21,936 — 76,353 Segment depreciation and amortization expense 23,794 4,127 5,977 33,898 Expenditures for segment assets 7,165 7,761 22 14,948 Period from January 13, 2017 through September 30, 2017 ES M&TS All Other Total Revenue $ 175,425 $ 76,855 $ — $ 252,280 Segment gross profit 49,224 10,153 — 59,377 Segment depreciation and amortization expense 17,698 1,758 145 19,601 Expenditures for segment assets 3,485 4,089 17 7,591 Predecessor Period from January 1, 2017 through January 12, 2017 ES M&TS All Other Total Revenue $ 7,451 $ 1,679 $ — $ 9,130 Segment gross profit 1,412 417 — 1,829 Segment depreciation and amortization expense 688 70 5 763 Expenditures for segment assets — — — — Successor As of September 30, 2018 ES M&TS All Other Total Segment property and equipment, net $ 55,034 $ 41,452 $ 357 $ 96,843 Segment goodwill 56,846 16,622 — 73,468 As of December 31, 2017 ES M&TS All Other Total Segment property and equipment, net $ 75,764 $ 23,725 $ 441 $ 99,930 Segment goodwill 56,846 16,622 — 73,468 The following is a reconciliation of segment gross profit to net income (loss): Successor Predecessor Three Months Ended September 30, 2018 Three Months Ended September 30, 2017 Nine Months Ended September 30, 2018 Period from January 13, 2017 through September 30, 2017 Period from January 1, 2017 through January 12, 2017 Segment gross profit $ 26,706 $ 23,154 $ 76,353 $ 59,377 $ 1,829 General and administrative expenses (32,625 ) (19,942 ) (65,944 ) (33,921 ) (3,170 ) Interest expense (17,034 ) (1,549 ) (26,708 ) (4,332 ) (4,181 ) Income from equity method investment 786 184 2,072 660 48 Income tax benefit 5,667 — 2,761 — — Net income (loss) $ (16,500 ) $ 1,847 $ (11,466 ) $ 21,784 $ (5,474 ) The following is a reconciliation of segment assets to total assets: As of September 30, 2018 As of December 31, 2017 Segment property and equipment, net $ 96,843 $ 99,930 Segment goodwill 73,468 73,468 Non-segment assets 288,452 204,253 Total assets $ 458,763 $ 377,651

Income Taxes

Income Taxes	9 Months Ended
	Sep. 30, 2018
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The Company is a "C" Corporation under the Internal Revenue Code of 1986, as amended, and, as a result, will be subject to U.S. federal, state and local income taxes. The Company's subsidiaries previously operated as partnerships for income tax purposes. Prior to the contribution of assets and liabilities to the Company on June 18, 2018, the subsidiaries passed through their taxable income to their owners for U.S federal and other state and local income tax purposes and thus the subsidiaries were not subject to U.S. federal income taxes or other state or local income taxes, except for franchise tax at the state level. Accordingly, the financial data attributable prior to the contribution on June 18, 2018 contains no provision for U.S. federal income taxes or income taxes in any state or locality other than franchise taxes. The Company has determined its opening balance for deferred income tax assets and liabilities to be a net deferred tax liability of $1,359 based on the future tax effects of temporary differences between the financial statement value and tax basis of assets and liabilities contributed to the Company upon conversion as a taxable corporation on June 18, 2018. In accordance with ASC 740, the tax effects have been recorded as a separate item of income tax expense. In order to determine the tax provision related to operating income at the end of each interim period, the Company estimates the annual effective tax rate and applies that to its pre-tax earnings. The Company's pre-tax earnings for the period ended September 30, 2018 included only 13 days of operating income for June and all of the third quarter since this period was subject to corporate income taxes for which the Company is liable. The computation of the annual estimated effective tax rate at each interim period requires certain estimates and judgments including, but not limited to, the expected operating income for the year, estimated permanent differences between book and tax amounts, and the likelihood of recovering deferred tax assets generated in the current year. The accounting estimates used to compute the provision for income taxes may change as new events occur and additional information is obtained. The Company’s effective tax rate, excluding discrete items, for the period June 18, 2018 through September 30, 2018 is 18.8% . This rate differs from the statutory rate of 21% for Federal income tax and 5.3% for the estimated state rate. This is primarily due to the impact of income attributable to non-controlling interest which is not subject to income tax at the Company level. The Company’s income tax returns for the year ended December 31, 2018 will be its initial tax returns filed with the U.S. federal, state and local governments. The examination of prior period tax returns filed for partnerships contributed to the Company in the reorganization could impact the Company’s tax expense and tax balance sheet accounts. The Company acquired a foreign subsidiary at formation and the subsidiary is subject to examination for prior calendar years, however, the Company is not aware of any potential adjustments for prior years and any such adjustment should not be material to the financial statements.

Earnings (Losses) Per Share

Earnings (Losses) Per Share	9 Months Ended
	Sep. 30, 2018
Earnings Per Share [Abstract]
Earnings (Losses) Per Share	Earnings (Losses) Per Share Basic earnings (losses) per share is computed by dividing net income (loss) attributable to the Company's shareholders by the weighted average number of shares outstanding during the period. Diluted earnings (losses) per share reflects all potential dilutive ordinary shares outstanding during the period and is computed by dividing net income (loss) available to the Company's shareholders by the weighted average number of shares outstanding during the period increased by the number of additional shares that would have been outstanding as dilutive securities. For the periods prior to the IPO, the average number of ordinary shares outstanding used to calculate basic and diluted earnings (losses) per share was based on the ordinary shares that were outstanding at the time of the IPO. As a result of the net loss per share for the three and nine months ended September 30, 2018, the inclusion of all potentially dilutive shares would be anti-dilutive. Therefore, dilutive shares (in thousands) of 1,181 and 959 , respectively, were excluded from the computation of the weighted-average shares for diluted net loss per share for the three and nine months ended September 30, 2018. Basic and diluted earnings (losses) per share is determined using the following information: Successor Predecessor Three Months Ended September 30, 2018 Three Months Ended September 30, 2017 Nine Months Ended September 30, 2018 Period from January 13, 2017 through September 30, 2017 Period from January 1, 2017 through January 12, 2017 Numerator: Net income (loss) attributable to Charah Solutions, Inc. $ (17,395 ) $ 1,057 $ (13,370 ) $ 19,922 $ (5,528 ) Denominator (in thousands): Weighted average shares outstanding 29,083 23,710 25,777 23,710 N/A Dilutive share-based awards — 822 — 822 N/A Total weighted average shares outstanding, including dilutive shares 29,083 24,532 25,777 24,532 N/A Basic earnings (losses) per share $ (0.60 ) $ 0.04 $ (0.52 ) $ 0.84 N/A Diluted earnings (losses) per share $ (0.60 ) $ 0.04 $ (0.52 ) $ 0.81 N/A

Nature of Business and Basis _2

Nature of Business and Basis of Presentation (Policies)	9 Months Ended
	Sep. 30, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	Under the Jumpstart Our Business Startups Act (the "JOBS Act"), the Company meets the definition of an “emerging growth company,” which allows the Company to have an extended transition period for complying with new or revised accounting standards pursuant to Section 107(b) of the JOBS Act. The Company intends to take advantage of all of the reduced reporting requirements and exemptions, including the longer phase-in periods for the adoption of new or revised financial accounting standards under Section 107 of the JOBS Act until the Company is no longer an emerging growth company. Among other things, we are not required to provide an auditor attestation report on the assessment of the internal control over financial reporting under Section 404(b) of the Sarbanes-Oxley Act of 2002 and our disclosure obligations regarding executive compensation may be reduced. We may take advantage of these provisions until the last day of our fiscal year following the fifth anniversary of our initial public offering, or December 31, 2023. However, if certain events occur prior to the end of such five-year period, including if we become a "large accelerated filer," our annual gross revenue exceeds $1.07 billion or we issue more than $1.0 billion of non-convertible debt in any three-year period, we will cease to be an emerging growth company prior to the end of such five-year period.
Recent Accounting Pronouncements	Recent Accounting Pronouncements In May 2014, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") 2014-09, Revenue from Contracts with Customers (Topic 606) , requiring an entity to recognize the amount of revenue to which it expects to be entitled for the transfer of promised goods or services to customers. The core principle of ASU 2014-09 is to recognize revenues when a customer obtains control of a good or service, in an amount that reflects the consideration to which an entity is expected to be entitled for those goods or services. Additionally, the ASU will require enhanced qualitative and quantitative disclosures regarding customer contracts. The standard will replace most existing revenue recognition guidance in GAAP when it becomes effective and permits the use of either a full retrospective or modified retrospective with cumulative effect transition method. In August 2015, the FASB issued ASU 2015-14, which deferred the effective date of ASU 2014-09 by one year. The updated standard will be effective for the year ending December 31, 2019. The Company is currently evaluating the effect that the new standard will have on the consolidated and combined financial statements. To assess the impact of the standard, we are utilizing internal resources to lead the implementation effort and supplement them with external resources. The Company’s adoption activities are being performed over three phases: (i) assessment, (ii) design, and (iii) implementation using a cross-functional team that includes accounting, operational and information technology personnel. Under ASU 2014-09, the Company’s contracts are being analyzed to determine whether the goods or services within each contract are distinct performance obligations. Based on our work to date, we believe we have identified all material contract types and revenues that may be impacted by the ASU. Generally, the Company believes the majority of its contracts will continue to be treated as a single unit of account because they contain only one performance obligation. The Environmental Solutions segment contains long term contracts where the identification of performance obligations may result in timing differences of revenue recognition and capitalization of costs, as compared to the Company’s current use of the percentage-of-completion method. The Company is in the process of analyzing the necessary changes to our systems, processes and internal controls in order to meet the ASU's revised reporting and disclosure requirements. The Company will adopt the new standard using the m odified r etrospective application. This standard could have a significant impact on the Company’s consolidated financial statements and an administrative impact on our operations. The impact will depend on the magnitude of the items discussed above. The Company will continue to evaluate the impact of the ASU through the implementation phase. In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842) , requiring all leases to be recognized on the balance sheet as a right-of-use asset and a lease liability, unless the lease is a short-term lease (generally a lease with a term of twelve months or less). At the commencement date of the lease, the Company will recognize: 1) a lease liability for Company’s obligation to make payments under the lease agreement, measured on a discounted basis; and 2) a right-of-use asset that represents the Company's right to use, or control the use of, the specified asset for the lease term. The ASU originally required recognition and measurement of leases at the beginning of the earliest period presented using a modified retrospective transition method. In July 2018, the FASB issued ASU 2018-11, which provided an additional (and optional) transition method that permits application of the updated standard at the adoption date with recognition of a cumulative-effect adjustment to the opening balance of retained earnings in the period of adoption. The updated standard will be effective for the Company for the year ending December 31, 2020, with early adoption permitted. The Company has not yet selected a transition method and is currently evaluating the effect that the new standard will have on its consolidated and combined financial statements. In August 2016, the FASB issued ASU 2016-15, Statement of Cash Flows: Classification of Certain Cash Receipts and Cash Payments . This update addresses specific cash flow issues, including debt prepayment or debt extinguishment costs, contingent consideration payments made after a business combination, and proceeds from the settlement of insurance claims. The guidance is effective for the Company for the year ending December 31, 2019. The Company is currently evaluating the effect that the new standard will have on the consolidated and combined financial statements. In November 2016, the FASB issued ASU 2016-18, Statement of Cash Flows (Topic 230) . This ASU requires that a statement of cash flows explain the change during the period in the total of cash, cash equivalents, and amounts generally described as restricted cash or restricted cash equivalents. Upon adopting the ASU, amounts generally described as restricted cash and restricted cash equivalents will be included with cash and cash equivalents when reconciling the beginning-of-period and end-of-period total amounts shown on the statement of cash flows. ASU 2016-18 will be effective for the Company for the year ending December 31, 2019, with early adoption permitted. The Company is currently evaluating the effect that the new standard will have on the consolidated and combined financial statements. In January 2017, the FASB issued ASU 2017-01, Business Combinations (Topic 805): Clarifying the Definition of a Business , which provides guidance to assist entities with evaluating whether transactions should be accounted for as acquisitions (or disposals) of assets or businesses. ASU 2017-01 requires entities to use a screen test to determine when an integrated set of assets and activities is not a business or if the integrated set of assets and activities needs to be further evaluated against the framework. The Company adopted the new standard effective January 1, 2018 on a prospective basis. The new standard did not have a material impact on our condensed consolidated financial statements. In January 2017, the FASB issued ASU 2017-04, Intangibles - Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment . The ASU simplifies the measurement of goodwill impairment by eliminating the requirement that an entity compute the implied fair value of goodwill based on the fair values of its assets and liabilities to measure impairment. Instead, goodwill impairment will be measured as the difference between the fair value of the reporting unit and the carrying value of the reporting unit. The ASU also clarifies the treatment of the income tax effect of tax-deductible goodwill when measuring goodwill impairment loss. The Company will be required to adopt ASU 2017-04 as of January 1, 2020. ASU 2017-04 must be applied prospectively, with early adoption permitted. The Company is currently evaluating the effect that the new standard will have on its consolidated and combined financial statements. In May 2017, the FASB issued ASU 2017-09, Compensation-Stock Compensation (Topic 718): Scope of Modification Accounting , to provide guidance about which changes to the terms or conditions of a share-based payment award require an entity to apply modification accounting in ASC 718. The Company adopted the new standard effective January 1, 2018 on a prospective basis. The new standard did not have a material impact on our condensed consolidated financial statements.

Business Combination (Tables)

Business Combination (Tables)	9 Months Ended
	Sep. 30, 2018
Business Combinations [Abstract]
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed	By the application of “push-down” accounting, Charah’s assets and liabilities were accordingly adjusted to fair value. Net working capital $ 26,704 Net operating assets/liabilities 9,679 Property, plant and equipment 107,876 Rail easement 110 Purchase option liability (29,883 ) Trade name intangible assets 34,330 Customer relationship intangible assets 78,200 Goodwill 73,468 Total purchase price $ 300,484 I
Business Acquisition, Pro Forma Information	The following unaudited information presents the pro forma consolidated revenue and net income for the periods indicated as if the acquisition had been included in the consolidated results of operations beginning January 1, 2017. Successor Predecessor Three Months Ended September 30, 2018 Three Months Ended September 30, 2017 Nine Months Ended September 30, 2018 Period from January 13, 2017 through September 30, 2017 Period from January 1, 2017 through January 12, 2017 Pro forma revenue $ 186,002 $ 138,993 $ 554,077 $ 305,998 $ 11,158 Pro forma net income (loss) attributable to Charah Solutions, Inc. (17,379 ) 1,364 (12,568 ) 20,443 (5,447 )

Equity Method Investments (Tabl

Equity Method Investments (Tables)	9 Months Ended
	Sep. 30, 2018
Equity Method Investments and Joint Ventures [Abstract]
Equity Method Investments	Summarized balance sheet information of our equity method investment entity as of: September 30, December 31, Current assets $ 2,943 $ 1,946 Noncurrent assets 763 764 Total assets $ 3,706 $ 2,710 Current liabilities 529 298 Equity of Charah 5,389 5,006 Equity of joint venture partner (2,212 ) (2,594 ) Total liabilities and members' equity $ 3,706 $ 2,710 Summarized financial performance of our equity method investment entity is as follows: Successor Predecessor Three Months Ended September 30, 2018 Three Months Ended September 30, 2017 Nine Months Ended September 30, 2018 Period from January 13, 2017 through September 30, 2017 Period from January 1 2017, through January 12, 2017 Operating Data Revenues $ 3,409 $ 2,151 $ 8,438 $ 5,922 $ 300 Net income $ 1,572 $ 367 $ 4,144 $ 1,320 $ 96 The Company’s share of net income $ 786 $ 184 $ 2,072 $ 660 $ 48 The following table reflects our proportional ownership activity in our investment account: Successor Predecessor Three Months Ended September 30, 2018 Three Months Ended September 30, 2017 Nine Months Ended September 30, 2018 Period from January 13, 2017 through September 30, 2017 Period from January 1 2017, through January 12, 2017 Opening balance $ 5,354 $ 5,115 $ 5,006 $ 5,289 $ 5,241 Distributions (751 ) (283 ) (1,689 ) (933 ) — Share of net income 786 184 2,072 660 48 Closing balance $ 5,389 $ 5,016 $ 5,389 $ 5,016 $ 5,289

Intangible Assets (Tables)

Intangible Assets (Tables)	9 Months Ended
	Sep. 30, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
Finite-Lived and Indefinite-Lived Intangible Assets Acquired as Part of Business Combination	The Company’s intangible assets consist of the following as of: September 30, 2018 Gross Carrying Amount Accumulated Amortization Net Customer relationships $ 78,200 $ 13,033 $ 65,167 Other - Rail easement 110 41 69 Trade name (indefinite lived) 34,330 — 34,330 Goodwill 73,468 — 73,468 186,108 13,074 173,034 Other - Patents acquired (Note 2) 2,133 107 2,026 Non-compete and other agreements acquired (Note 2) 1,373 108 1,265 Customer relationships acquired (Note 2) 1,427 71 1,356 Trade name acquired (Note 2) 633 63 570 Closing balance $ 191,674 $ 13,423 $ 178,251 December 31, 2017 Gross Carrying Amount Accumulated Amortization Net Customer relationships $ 78,200 $ 7,168 $ 71,032 Rail easement 110 23 87 Trade name (indefinite lived) 34,330 — 34,330 Goodwill 73,468 — 73,468 Closing balance $ 186,108 $ 7,191 $ 178,917
Schedule of Intangible Assets and Goodwill	The Company’s intangible assets consist of the following as of: September 30, 2018 Gross Carrying Amount Accumulated Amortization Net Customer relationships $ 78,200 $ 13,033 $ 65,167 Other - Rail easement 110 41 69 Trade name (indefinite lived) 34,330 — 34,330 Goodwill 73,468 — 73,468 186,108 13,074 173,034 Other - Patents acquired (Note 2) 2,133 107 2,026 Non-compete and other agreements acquired (Note 2) 1,373 108 1,265 Customer relationships acquired (Note 2) 1,427 71 1,356 Trade name acquired (Note 2) 633 63 570 Closing balance $ 191,674 $ 13,423 $ 178,251 December 31, 2017 Gross Carrying Amount Accumulated Amortization Net Customer relationships $ 78,200 $ 7,168 $ 71,032 Rail easement 110 23 87 Trade name (indefinite lived) 34,330 — 34,330 Goodwill 73,468 — 73,468 Closing balance $ 186,108 $ 7,191 $ 178,917
Schedule Of Finite Lived Intangible Assets, Estimated Useful Life	As of September 30, 2018 , and December 31, 2017 , definite lived intangible assets include customer relationships, patents, non-compete and licensing agreements, trade name, and a rail easement. These assets are amortized on a straight-line basis over their estimated useful lives as shown in the table below. Amortization expense was $2,135 , $1,961 , $6,232 , $5,230 and $0 during the three months ended September 30, 2018 (Successor), the three months ended September 30, 2017 (Successor), the nine months ended September 30, 2018 (Successor), the period from January 13, 2017 through September 30, 2017 (Successor) and the period from January 1, 2017 through January 12, 2017 (Predecessor), respectively. Definite Lived Intangible Useful Life Customer relationships 10 years Patents 10 years Non-compete agreement 2 years Licensing agreements 15 years Trade name 5 years Rail easement 4.5 years

Notes Payable (Tables)

Notes Payable (Tables)	9 Months Ended
	Sep. 30, 2018
Debt Disclosure [Abstract]
Schedule of Debt	The following table summarizes the major components of debt at each balance sheet date and provides maturities and interest rate ranges for each major category as of September 30, 2018 : September 30, December 31, 2017 Various equipment notes entered into in November 2017, payable in monthly installments ranging from $5 to $24 including interest at 5.2%, maturing in December 2022 through December 2023. The notes are secured by equipment with a net book value of $4,824 as of September 30, 2018 (Successor). $ 5,185 $ 5,910 Various equipment notes entered into in 2018, payable in monthly installments ranging from $6 to $38 including interest ranging from 5.90% to 6.80%, maturing in March 2023 through May 2025. The notes are secured by equipment with a net book value of $12,297 as of September 30, 2018 (Successor). 12,704 — In June 2018, the Company entered into a $12,000 convertible non-revolving credit note with a bank. The credit note will convert to a term loan on April 10, 2019, with a maturity date of April 10, 2024. Interest on borrowings prior to the conversion date is calculated using a floating rate equal to 2% in excess of LIBOR. At the conversion date, interest can be either calculated based on the aforementioned rate or at a fixed rate equal to 2% in excess of the 5-year Swap Rate in effect at the conversion date, based on the Company's preference. 5,896 — A $10,000 equipment line with a bank, entered into during December 2017, secured by all equipment purchased with the proceeds of the loan. Interest is calculated on any outstanding amounts using a fixed rate of 4.5%. The equipment line converted to a term loan in September 2018, with a maturity date of June 22, 2023. The note is secured by equipment with a net book value of $9,462 as of September 30, 2018 (Successor). 10,000 3,244 A credit agreement with a bank, entered into during October 2017, providing for a senior secured term loan B facility with an initial commitment of $250,000 (the Term Loan). The interest rates per annum applicable to the loans under the Term Loan were based on a fluctuating rate of interest measured by reference to, at the Company's election, either (1) LIBOR plus a 6.25% borrowing margin, or (2) an alternative base rate plus a 5.25% borrowing margin. The principal amount of the Term Loan amortized at a rate of 7.5% per annum with all remaining outstanding amounts under the Term Loan due on the Term Loan maturity date. A portion of the IPO proceeds was used to prepay scheduled principal payments which would otherwise have been required through June 2020. The Term Loan had a scheduled maturity date of October 25, 2024. The Term Loan was secured by substantially all the assets of the Company and was subject to certain financial covenants. The loan was repaid in full in September 2018. — 250,000 A term loan entered into in September 2018 as part of the Syndicated Credit Facility (see also Note 5). The interest rate applicable to the term loan is based on a fluctuating rate of interest measured by reference to, at the Company’s election, either (1) the LIBOR rate, or (2) an alternative base rate (see also Note 5). Principal payments of $2,563 are required quarterly through September 2020, $3,844 through September 2022, and $5,125 through September 2023. The remaining outstanding amounts will be due in September 2023. The loan is secured by substantially all the assets of the Company. The loan is subject to certain financial covenants. 205,000 — Total 238,785 259,154 Less debt issuance costs (3,423 ) (11,460 ) 235,362 247,694 Less current maturities (20,766 ) (19,996 ) Notes payable due after one year $ 214,596 $ 227,698

Costs and Estimated Earnings _2

Costs and Estimated Earnings on Uncompleted Contracts (Tables)	9 Months Ended
	Sep. 30, 2018
Revenue Recognition and Deferred Revenue [Abstract]
Costs in Excess of Billings and Billings in Excess of Costs	Costs and estimated earnings on uncompleted contracts as of: September 30, December 31, Costs incurred on uncompleted contracts $ 252,166 $ 151,963 Estimated earnings 82,260 53,356 Total costs and earnings 334,426 205,319 Less billings to date (276,476 ) (213,242 ) Costs and estimated earnings in excess of billings $ 57,950 $ (7,923 ) The net balance in process is classified on the condensed consolidated and combined balance sheets as of: September 30, December 31, Costs and estimated earnings in excess of billings $ 62,549 $ 7,959 Billings in excess of costs and estimated earnings (4,599 ) (15,882 ) Net balance in process $ 57,950 $ (7,923 )

Business Segment and Related _2

Business Segment and Related Information (Tables)	9 Months Ended
	Sep. 30, 2018
Segment Reporting [Abstract]
Schedule of Segment Reporting Information, by Segment	Summarized financial information with respect to the reportable segments is as follows: Successor Three Months Ended September 30, 2018 ES M&TS All Other Total Revenue $ 103,848 $ 82,154 $ — $ 186,002 Segment gross profit 19,852 6,854 — 26,706 Segment depreciation and amortization expense 13,050 1,720 1,993 16,763 Three Months Ended September 30, 2017 ES M&TS All Other Total Revenue $ 65,930 $ 52,981 $ — $ 118,911 Segment gross profit 18,683 4,471 — 23,154 Segment depreciation and amortization expense 6,128 624 50 6,802 Nine Months Ended September 30, 2018 ES M&TS All Other Total Revenue $ 241,745 $ 295,509 $ — $ 537,254 Segment gross profit 54,417 21,936 — 76,353 Segment depreciation and amortization expense 23,794 4,127 5,977 33,898 Expenditures for segment assets 7,165 7,761 22 14,948 Period from January 13, 2017 through September 30, 2017 ES M&TS All Other Total Revenue $ 175,425 $ 76,855 $ — $ 252,280 Segment gross profit 49,224 10,153 — 59,377 Segment depreciation and amortization expense 17,698 1,758 145 19,601 Expenditures for segment assets 3,485 4,089 17 7,591 Predecessor Period from January 1, 2017 through January 12, 2017 ES M&TS All Other Total Revenue $ 7,451 $ 1,679 $ — $ 9,130 Segment gross profit 1,412 417 — 1,829 Segment depreciation and amortization expense 688 70 5 763 Expenditures for segment assets — — — — Successor As of September 30, 2018 ES M&TS All Other Total Segment property and equipment, net $ 55,034 $ 41,452 $ 357 $ 96,843 Segment goodwill 56,846 16,622 — 73,468 As of December 31, 2017 ES M&TS All Other Total Segment property and equipment, net $ 75,764 $ 23,725 $ 441 $ 99,930 Segment goodwill 56,846 16,622 — 73,468
Reconciliation of Revenue from Segments to Consolidated	The following is a reconciliation of segment gross profit to net income (loss): Successor Predecessor Three Months Ended September 30, 2018 Three Months Ended September 30, 2017 Nine Months Ended September 30, 2018 Period from January 13, 2017 through September 30, 2017 Period from January 1, 2017 through January 12, 2017 Segment gross profit $ 26,706 $ 23,154 $ 76,353 $ 59,377 $ 1,829 General and administrative expenses (32,625 ) (19,942 ) (65,944 ) (33,921 ) (3,170 ) Interest expense (17,034 ) (1,549 ) (26,708 ) (4,332 ) (4,181 ) Income from equity method investment 786 184 2,072 660 48 Income tax benefit 5,667 — 2,761 — — Net income (loss) $ (16,500 ) $ 1,847 $ (11,466 ) $ 21,784 $ (5,474 )
Reconciliation of Assets from Segment to Consolidated	The following is a reconciliation of segment assets to total assets: As of September 30, 2018 As of December 31, 2017 Segment property and equipment, net $ 96,843 $ 99,930 Segment goodwill 73,468 73,468 Non-segment assets 288,452 204,253 Total assets $ 458,763 $ 377,651

Earnings (Losses) Per Share (Ta

Earnings (Losses) Per Share (Tables)	9 Months Ended
	Sep. 30, 2018
Earnings Per Share [Abstract]
Schedule of Earnings Per Share, Basic and Diluted	Basic and diluted earnings (losses) per share is determined using the following information: Successor Predecessor Three Months Ended September 30, 2018 Three Months Ended September 30, 2017 Nine Months Ended September 30, 2018 Period from January 13, 2017 through September 30, 2017 Period from January 1, 2017 through January 12, 2017 Numerator: Net income (loss) attributable to Charah Solutions, Inc. $ (17,395 ) $ 1,057 $ (13,370 ) $ 19,922 $ (5,528 ) Denominator (in thousands): Weighted average shares outstanding 29,083 23,710 25,777 23,710 N/A Dilutive share-based awards — 822 — 822 N/A Total weighted average shares outstanding, including dilutive shares 29,083 24,532 25,777 24,532 N/A Basic earnings (losses) per share $ (0.60 ) $ 0.04 $ (0.52 ) $ 0.84 N/A Diluted earnings (losses) per share $ (0.60 ) $ 0.04 $ (0.52 ) $ 0.81 N/A

Nature of Business and Basis _3

Nature of Business and Basis of Presentation (Details) - shares	3 Months Ended	9 Months Ended	12 Months Ended
	Sep. 30, 2018	Sep. 30, 2018	Dec. 31, 2017
Bernhard Capital Partners Management, LP (BCP) | Common Stock
Business Acquisition, Equity Interests Issued or Issuable [Line Items]
Equity interest contributed in exchange for shares of stock (in shares)		17,514,745
CEP Holdings, Inc. | Common Stock
Business Acquisition, Equity Interests Issued or Issuable [Line Items]
Equity interest contributed in exchange for shares of stock (in shares)		4,605,465
Charah Management Holdings LLC | Common Stock
Business Acquisition, Equity Interests Issued or Issuable [Line Items]
Equity interest contributed in exchange for shares of stock (in shares)		907,113
Allied Management Holdings, LLC | Common Stock
Business Acquisition, Equity Interests Issued or Issuable [Line Items]
Equity interest contributed in exchange for shares of stock (in shares)		409,075
Pro Forma
Business Acquisition, Equity Interests Issued or Issuable [Line Items]
Effective income tax rate	25.00%		38.00%

Business Combination - Charah M

Business Combination - Charah Management (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017	Jan. 13, 2017	Jan. 12, 2017
Business Acquisition [Line Items]
Goodwill	$ 73,468	$ 73,468
Charah Management LLC
Business Acquisition [Line Items]
Net working capital			$ 26,704
Net operating assets/liabilities			9,679
Property, plant and equipment			107,876
Purchase option liability			(29,883)
Goodwill			73,468
Total purchase price			300,484
Rail easement | Charah Management LLC
Business Acquisition [Line Items]
Intangible assets			110
Trade name intangible assets | Charah Management LLC
Business Acquisition [Line Items]
Intangible assets			34,330
Customer relationships | Charah Management LLC
Business Acquisition [Line Items]
Intangible assets			$ 78,200
Charah Management LLC | Bernhard Capital Partners Management, LP (BCP)
Business Acquisition [Line Items]
Equity method investment, ownership percentage				76.00%
Charah Management LLC | Bernhard Capital Partners Management, LP (BCP) | Charah Management LLC
Business Acquisition [Line Items]
Equity method investment, ownership percentage			76.00%

Business Combination - SBC Mate

Business Combination - SBC Materials International, Inc. (Details) - USD ($) $ in Thousands	Nov. 14, 2018	Mar. 30, 2018	Sep. 30, 2018	Dec. 31, 2017
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Goodwill			$ 73,468	$ 73,468
SBC Materials International, Inc.
Business Acquisition [Line Items]
Purchase price		$ 35,000
Payment at closing		20,000
Additional payment to be paid based on certain performance metrics		15,000
Goodwill, expected tax deductible amount			$ 1,180
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Cash acquired		17
Net working capital, excluding cash		21,185
Property, plant and equipment		5,300
Total purchase price		32,037
SBC Materials International, Inc. | Trade name intangible assets
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Intangible assets		633
SBC Materials International, Inc. | Customer relationship intangible assets
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Intangible assets		1,427
SBC Materials International, Inc. | Technology
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Intangible assets		2,102
SBC Materials International, Inc. | Non-compete and other agreements
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Intangible assets		$ 1,373
Subsequent Event | SBC Materials International, Inc.
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Reduction in purchase price to be paid over time	$ 2,963

Business Combination - Pro Form

Business Combination - Pro Forma (Details) - USD ($) $ in Thousands	Jan. 12, 2017	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Business Acquisition [Line Items]
Actual revenue from the acquired business		$ 14,890		$ 31,463
Actual earnings from the acquired business		368		1,322
Pro forma revenue		186,002	$ 138,993	554,077	$ 305,998
Pro forma net income (loss) attributable to Charah Solutions, Inc.		(17,379)	$ 1,364	(12,568)	$ 20,443
Direct acquisition costs		$ 589		$ 589
Predecessor
Business Acquisition [Line Items]
Pro forma revenue	$ 11,158
Pro forma net income (loss) attributable to Charah Solutions, Inc.	$ (5,447)

Equity Method Investments - Sum

Equity Method Investments - Summarized Financial Information (Details) - USD ($) $ in Thousands	Jan. 12, 2017	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Equity Method Investment, Summarized Financial Information, Assets [Abstract]
Receivable due from equity method investment		$ 146		$ 146		$ 61
Current assets		2,943		2,943		1,946
Noncurrent assets		763		763		764
Total assets		3,706		3,706		2,710
Equity Method Investment, Summarized Financial Information, Liabilities and Equity [Abstract]
Current liabilities		529		529		298
Equity of Charah		5,389		5,389		5,006
Equity of joint venture partner		(2,212)		(2,212)		(2,594)
Total liabilities and members' equity		3,706		3,706		$ 2,710
Equity Method Investment, Summarized Financial Information, Income Statement [Abstract]
Revenues		3,409	$ 2,151	8,438	$ 5,922
Net income		1,572	367	4,144	1,320
The Company’s share of net income		$ 786	$ 184	$ 2,072	$ 660
Predecessor
Equity Method Investment, Summarized Financial Information, Income Statement [Abstract]
Revenues	$ 300
Net income	96
The Company’s share of net income	$ 48

Equity Method Investments - Own

Equity Method Investments - Ownership (Details) - USD ($) $ in Thousands	Jan. 12, 2017	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Equity Method Investment, Proportional Ownership Activity [Roll Forward]
Opening balance		$ 5,354	$ 5,115	$ 5,006	$ 5,289
Distributions		(751)	(283)	(1,689)	(933)
Share of net income		786	184	2,072	660
Closing balance	$ 5,289	$ 5,389	$ 5,016	$ 5,389	5,016
Predecessor
Equity Method Investment, Proportional Ownership Activity [Roll Forward]
Opening balance	5,241				$ 5,289
Distributions	0
Share of net income	48
Closing balance	$ 5,289

Intangible Assets (Details)

Intangible Assets (Details) - USD ($) $ in Thousands	Jan. 12, 2017	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Acquired Finite-Lived Intangible Assets [Line Items]
Accumulated Amortization		$ 13,423		$ 13,423		$ 7,191
Goodwill		73,468		73,468
Intangible assets, gross, excluding intangible assets acquired		186,108		186,108
Accumulated Amortization, excluding intangible assets acquired		13,074		13,074
Intangible assets, net, excluding intangible assets acquired		173,034		173,034
Intangible assets, gross		191,674		191,674		186,108
Intangible assets, net		178,251		178,251		178,917
Amortization of intangible assets		2,135	$ 1,961	6,232	$ 5,230
Customer relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Finite lived intangible assets, gross						78,200
Finite lived intangible assets, excluding additions, gross		78,200		78,200
Accumulated Amortization		13,033		13,033		7,168
Finite lived intangible assets, excluding additions, net		65,167		65,167
Finite lived intangible assets, net		66,523		$ 66,523		71,032
Finite-lived intangible asset, useful life				10 years
Other - Rail easement
Acquired Finite-Lived Intangible Assets [Line Items]
Finite lived intangible assets, gross		110		$ 110		110
Accumulated Amortization		41		41		23
Finite lived intangible assets, net		69		$ 69		87
Finite-lived intangible asset, useful life				4 years 6 months
Other - Patents acquired (Note 2)
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible asset, useful life				10 years
Non-compete and other agreements acquired (Note 2)
Acquired Finite-Lived Intangible Assets [Line Items]
Finite lived intangible assets, net		1,265		$ 1,265		0
Finite-lived intangible asset, useful life				2 years
Trade name
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible asset, useful life				5 years
Licensing agreements
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible asset, useful life				15 years
SBC Materials International, Inc. | Customer relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Finite lived intangible assets, gross		1,427		$ 1,427
Accumulated Amortization		71		71
Finite lived intangible assets, net		1,356		1,356
SBC Materials International, Inc. | Other - Patents acquired (Note 2)
Acquired Finite-Lived Intangible Assets [Line Items]
Finite lived intangible assets, gross		2,133		2,133
Accumulated Amortization		107		107
Finite lived intangible assets, net		2,026		2,026
SBC Materials International, Inc. | Non-compete and other agreements acquired (Note 2)
Acquired Finite-Lived Intangible Assets [Line Items]
Finite lived intangible assets, gross		1,373		1,373
Accumulated Amortization		108		108
Finite lived intangible assets, net		1,265		1,265
SBC Materials International, Inc. | Trade name
Acquired Finite-Lived Intangible Assets [Line Items]
Finite lived intangible assets, gross		633		633
Accumulated Amortization		63		63
Finite lived intangible assets, net		570		570
Predecessor
Acquired Finite-Lived Intangible Assets [Line Items]
Amortization of intangible assets	$ 0
Trade name
Acquired Indefinite-lived Intangible Assets [Line Items]
Trade name (indefinite lived)		$ 34,330		$ 34,330		$ 34,330

Credit Agreement (Details)

Credit Agreement (Details) - USD ($)	9 Months Ended
	Sep. 30, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Long-term debt	$ 235,362,000	$ 247,694,000
Line of credit	5,106,000	0
Revolving Credit Facility | Line of Credit | Revolving Credit Facility due October 25, 2022
Debt Instrument [Line Items]
Initial commitment	$ 45,000,000
Unused capacity, commitment fee percentage	0.50%
Long-term debt		$ 0
Revolving Credit Facility | Line of Credit | Revolving Credit Facility due October 25, 2022 | LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate	2.00%
Revolving Credit Facility | Line of Credit | Revolving Credit Facility due October 25, 2022 | Base Rate
Debt Instrument [Line Items]
Basis spread on variable rate	1.00%
Revolving Credit Facility | Line of Credit | Syndicated Credit Facility
Debt Instrument [Line Items]
Initial commitment	$ 50,000,000
Line of credit	5,106,000
Term Loan | Line of Credit | Syndicated Credit Facility
Debt Instrument [Line Items]
Initial commitment	205,000,000
Loan Commitment | Line of Credit | Syndicated Credit Facility
Debt Instrument [Line Items]
Initial commitment	$ 25,000,000
Letter of Credit | Line of Credit | Revolving Credit Facility due October 25, 2022
Debt Instrument [Line Items]
Commitment fee percentage	2.00%
Letter of Credit | Line of Credit | Syndicated Credit Facility
Debt Instrument [Line Items]
Long-term debt	$ 12,531,000
Minimum | Line of Credit | Syndicated Credit Facility
Debt Instrument [Line Items]
Unused capacity, commitment fee percentage	0.25%
Commitment fee percentage	1.30%
Maximum | Line of Credit | Syndicated Credit Facility
Debt Instrument [Line Items]
Unused capacity, commitment fee percentage	0.35%
Commitment fee percentage	2.10%

Notes Payable (Details)

Notes Payable (Details) - USD ($)	3 Months Ended	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Total	$ 238,785,000	$ 238,785,000	$ 259,154,000
Less debt issuance costs	(3,423,000)	(3,423,000)	(11,460,000)
Long-term debt	235,362,000	235,362,000	247,694,000
Less current maturities	(20,766,000)	(20,766,000)	(19,996,000)
Notes payable due after one year	214,596,000	214,596,000	227,698,000
Quarterly principal payments through September 2020	2,563,000	2,563,000
Quarterly principal payments through September 2022	3,844,000	3,844,000
Quarterly principal payments through September 2023	5,125,000	5,125,000
Notes Payable | Equipment Notes Payable, 5.2 % Due December 2022 and 2023
Debt Instrument [Line Items]
Total	5,185,000	5,185,000	5,910,000
Equipment net book value	$ 4,658,000	$ 4,658,000
Interest rate	5.20%	5.20%
Notes Payable | Equipment Notes Payable, 5.2 % Due December 2022 and 2023 | Minimum
Debt Instrument [Line Items]
Monthly installments	$ 5,000	$ 5,000
Notes Payable | Equipment Notes Payable, 5.2 % Due December 2022 and 2023 | Maximum
Debt Instrument [Line Items]
Monthly installments	24,000	24,000
Notes Payable | Equipment Notes Payable, 5.90% and 6.80% Due March 2023 Through May 2025
Debt Instrument [Line Items]
Total	12,704,000	12,704,000	0
Equipment net book value	12,305,000	12,305,000
Notes Payable | Equipment Notes Payable, 5.90% and 6.80% Due March 2023 Through May 2025 | Minimum
Debt Instrument [Line Items]
Monthly installments	$ 6,000	$ 6,000
Interest rate	5.90%	5.90%
Notes Payable | Equipment Notes Payable, 5.90% and 6.80% Due March 2023 Through May 2025 | Maximum
Debt Instrument [Line Items]
Monthly installments	$ 38,000	$ 38,000
Interest rate	6.80%	6.80%
Notes Payable | Equipment Notes Payable Two, 5.90% and 6.80% Due March 2023 Through May 2025
Debt Instrument [Line Items]
Total	$ 5,896,000	$ 5,896,000	0
Equipment net book value	3,853,000	3,853,000
Notes Payable | Equipment Notes Payable Two, 5.90% and 6.80% Due March 2023 Through May 2025 | Minimum
Debt Instrument [Line Items]
Monthly installments	$ 6,000	$ 6,000
Interest rate	5.90%	5.90%
Notes Payable | Equipment Notes Payable Two, 5.90% and 6.80% Due March 2023 Through May 2025 | Maximum
Debt Instrument [Line Items]
Monthly installments	$ 38,000	$ 38,000
Interest rate	6.80%	6.80%
Line of Credit | 4.5% Equipment Line Of Credit
Debt Instrument [Line Items]
Total	$ 10,000,000	$ 10,000,000	3,244,000
Long-term debt	8,118,000	8,118,000
Initial commitment	$ 10,000,000	$ 10,000,000
Interest rate	4.50%	4.50%
Line of Credit | $250,000 Term Loan Due October 25, 2024
Debt Instrument [Line Items]
Total	$ 0	$ 0	250,000,000
Initial commitment	$ 250,000,000	$ 250,000,000
Interest rate	7.50%	7.50%
Line of Credit | $250,000 Term Loan Due October 25, 2024 | LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate	6.25%	6.25%
Line of Credit | $250,000 Term Loan Due October 25, 2024 | Base Rate
Debt Instrument [Line Items]
Basis spread on variable rate	5.25%	5.25%
Line of Credit | Syndicated Credit Facility
Debt Instrument [Line Items]
Total	$ 205,000,000	$ 205,000,000	$ 0
Interest expense, debt	12,500,000	$ 12,500,000
Write off of debt issue costs	10,400,000
Prepayment penalty	$ 2,100,000

Interest Rate Swap (Details)

Interest Rate Swap (Details) - Interest Rate Swap - Not Designated as Hedging Instrument - USD ($)	Jan. 12, 2017	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Derivatives, Fair Value [Line Items]
Derivative, notional amount		$ 150,000,000		$ 150,000,000		$ 150,000,000
Gain on derivative		629,000	$ 0	2,857,000	$ 0
Other Assets
Derivatives, Fair Value [Line Items]
Derivative asset, fair value		$ 2,659,000		$ 2,659,000
Other Liabilities
Derivatives, Fair Value [Line Items]
Derivative liability, fair value						$ 198,000
Predecessor
Derivatives, Fair Value [Line Items]
Gain on derivative	$ 0

Costs and Estimated Earnings _3

Costs and Estimated Earnings on Uncompleted Contracts - Activity (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Revenue Recognition and Deferred Revenue [Abstract]
Costs incurred on uncompleted contracts	$ 252,166	$ 151,963
Estimated earnings	82,260	53,356
Total costs and earnings	334,426	205,319
Less billings to date	(276,476)	(213,242)
Costs and estimated earnings in excess of billings	$ 57,950	$ (7,923)

Costs and Estimated Earnings _4

Costs and Estimated Earnings on Uncompleted Contracts - Balance Sheet Classification (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Revenue Recognition and Deferred Revenue [Abstract]
Costs and estimated earnings in excess of billings	$ 62,549	$ 7,959
Billings in excess of costs and estimated earnings	(4,599)	(15,882)
Costs and estimated earnings in excess of billings	$ 57,950	$ (7,923)

Distributions to Stockholder _2

Distributions to Stockholder and Members (Details) - USD ($) $ in Thousands	Jan. 12, 2017	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Equity [Abstract]
Cash distributions paid	$ 20,660	$ 0	$ 587	$ 686	$ 16,085

Stock_Unit Based Compensation (

Stock/Unit Based Compensation (Details) - USD ($)	Jun. 18, 2018	Jan. 12, 2017	Aug. 31, 2018	Jun. 30, 2018	Jul. 31, 2017	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
2018 Omnibus Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost						$ 3,483,000		$ 3,483,000
Compensation expense						$ 1,046,000		$ 2,235,000
2018 Omnibus Incentive Plan | Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized to be issued (in units)						3,006,582		3,006,582
Vesting period			1 year	1 year
Issuance of shares (in shares)			45,004	44,198
Grant date fair value (in dollars per share)			$ 7.67	$ 12
Charah Management LLC | Series B Membership Interests
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted in period (in units)					1,900,000
Charah Management LLC | Series C Profits Interests Plan | Series C Profits Interests
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized to be issued (in units)						1,000		1,000
Granted in period (in units)										650
Vesting period								5 years		5 years
Unvested units outstanding (in units)	540
Assumed volatility rate								30.00%
Weighted average grant date fair value (in dollars per share)										$ 3,198
Unrecognized compensation cost										$ 2,100,000
Compensation expense						$ 0	$ 85,000	$ 214,000	$ 226,000
Allied Power Management, LLC | Series B Membership Interests
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted in period (in units)					100,000
Compensation expense						$ 0	$ 2,080,000	$ 0	2,080,000
Allied Power Management, LLC | Allied Series C Profits Interests Plan | Allied Series C Profits Interests
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized to be issued (in units)						1,000		1,000
Granted in period (in units)										550
Assumed volatility rate										32.50%
Weighted average grant date fair value (in dollars per share)										$ 69
Compensation expense		$ 0				$ 0		$ 0	$ 38,000
Predecessor | Charah Management LLC | Series C Profits Interests Plan | Series C Profits Interests
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense		0
Predecessor | Allied Power Management, LLC | Series B Membership Interests
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense		$ 0
Holders Of Charah Series C Profits Interests And Allied Series C Profits Interests | IPO
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Issuance of shares (in shares)	1,215,956
Holders Of Charah Series C Profits Interests And Allied Series C Profits Interests | IPO | Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Issuance of shares (in shares)	911,963
Holders Of Charah Series C Profits Interests And Allied Series C Profits Interests | IPO | Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grant date fair value (in dollars per share)	$ 12
Holders Of Charah Series C Profits Interests And Allied Series C Profits Interests | IPO | 2018 Omnibus Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Issuance of shares (in shares)	272,708
Vesting Over One Year | Holders Of Charah Series C Profits Interests And Allied Series C Profits Interests | IPO | 2018 Omnibus Incentive Plan | Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Issuance of shares (in shares)	204,532

Commitments and Contingencies (

Commitments and Contingencies (Details) $ in Millions	Sep. 30, 2018USD ($)
Pending Litigation
Loss Contingencies [Line Items]
Loss contingency accrual	$ 20

Business Segment and Related _3

Business Segment and Related Information (Details) - USD ($) $ in Thousands	Jan. 12, 2017	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Segment Reporting Information [Line Items]
Revenue		$ 186,002	$ 118,911	$ 537,254	$ 252,280
Segment gross profit		26,706	23,154	76,353	59,377
Segment depreciation and amortization expense		16,763	6,802	33,898	19,601
Expenditures for segment assets				14,948	7,591
Segment property and equipment, net		96,843		96,843		$ 99,930
Segment goodwill		73,468		73,468		73,468
Operating Segments
Segment Reporting Information [Line Items]
Segment gross profit		26,706	23,154	76,353	59,377
Segment property and equipment, net		96,843		96,843		99,930
Segment goodwill		73,468		73,468		73,468
Operating Segments | ES
Segment Reporting Information [Line Items]
Revenue		103,848	65,930	241,745	175,425
Segment gross profit		19,852	18,683	54,417	49,224
Segment depreciation and amortization expense		13,050	6,128	23,794	17,698
Expenditures for segment assets				7,165	3,485
Segment property and equipment, net		55,034		55,034		75,764
Segment goodwill		56,846		56,846		56,846
Operating Segments | M&TS
Segment Reporting Information [Line Items]
Revenue		82,154	52,981	295,509	76,855
Segment gross profit		6,854	4,471	21,936	10,153
Segment depreciation and amortization expense		1,720	624	4,127	1,758
Expenditures for segment assets				7,761	4,089
Segment property and equipment, net		41,452		41,452		23,725
Segment goodwill		16,622		16,622		16,622
Non-segment
Segment Reporting Information [Line Items]
Revenue		0	0	0	0
Segment gross profit		0	0	0	0
Segment depreciation and amortization expense		1,993	$ 50	5,977	145
Expenditures for segment assets				22	$ 17
Segment property and equipment, net		357		357		441
Segment goodwill		$ 0		$ 0		$ 0
Predecessor
Segment Reporting Information [Line Items]
Revenue	$ 9,130
Segment gross profit	1,829
Segment depreciation and amortization expense	763
Expenditures for segment assets	0
Predecessor | Operating Segments
Segment Reporting Information [Line Items]
Segment gross profit	1,829
Predecessor | Operating Segments | ES
Segment Reporting Information [Line Items]
Revenue	7,451
Segment gross profit	1,412
Segment depreciation and amortization expense	688
Expenditures for segment assets	0
Predecessor | Operating Segments | M&TS
Segment Reporting Information [Line Items]
Revenue	1,679
Segment gross profit	417
Segment depreciation and amortization expense	70
Expenditures for segment assets	0
Predecessor | Non-segment
Segment Reporting Information [Line Items]
Revenue	0
Segment gross profit	0
Segment depreciation and amortization expense	5
Expenditures for segment assets	$ 0

Business Segment and Related _4

Business Segment and Related Information - Reconciliation Of Segment Gross Profit to Net Income (Details) - USD ($) $ in Thousands	Jan. 12, 2017	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Segment Reporting, Revenue Reconciling Item [Line Items]
Segment gross profit		$ 26,706	$ 23,154	$ 76,353	$ 59,377
General and administrative expenses		32,625	19,942	65,944	33,921
Interest expense		(17,034)	(1,549)	(26,708)	(4,332)
Income from equity method investment		786	184	2,072	660
Income tax expense (benefit)		(5,667)	0	(2,761)	0
Net income (loss)		(16,500)	1,847	(11,466)	21,784
Operating Segments
Segment Reporting, Revenue Reconciling Item [Line Items]
Segment gross profit		26,706	23,154	76,353	59,377
Segment Reconciling Items
Segment Reporting, Revenue Reconciling Item [Line Items]
General and administrative expenses		(32,625)	(19,942)	(65,944)	(33,921)
Interest expense		(17,034)	(1,549)	(26,708)	(4,332)
Income from equity method investment		786	184	2,072	660
Income tax expense (benefit)		$ 5,667	$ 0	$ 2,761	$ 0
Predecessor
Segment Reporting, Revenue Reconciling Item [Line Items]
Segment gross profit	$ 1,829
General and administrative expenses	3,170
Interest expense	(4,181)
Income from equity method investment	48
Income tax expense (benefit)	0
Net income (loss)	(5,474)
Predecessor | Operating Segments
Segment Reporting, Revenue Reconciling Item [Line Items]
Segment gross profit	1,829
Predecessor | Segment Reconciling Items
Segment Reporting, Revenue Reconciling Item [Line Items]
General and administrative expenses	(3,170)
Interest expense	(4,181)
Income from equity method investment	48
Income tax expense (benefit)	$ 0

Business Segment and Related _5

Business Segment and Related Information - Reconciliation of Segment Assets to Total Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Segment Reporting, Asset Reconciling Item [Line Items]
Segment property and equipment, net	$ 96,843	$ 99,930
Goodwill	73,468	73,468
Assets	458,763	377,651
Operating Segments
Segment Reporting, Asset Reconciling Item [Line Items]
Segment property and equipment, net	96,843	99,930
Goodwill	73,468	73,468
Non-segment
Segment Reporting, Asset Reconciling Item [Line Items]
Segment property and equipment, net	357	441
Goodwill	0	0
Non-segment assets	$ 288,452	$ 204,253

Income Taxes (Details)

Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2018	Jun. 18, 2018
Income Tax Disclosure [Abstract]
Net deferred tax liability			$ 1,359
Effective income tax rate	18.80%	25.00%

Earnings (Losses) Per Share (De

Earnings (Losses) Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	Jan. 12, 2017	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Numerator:
Net income (loss) attributable to Charah Solutions, Inc.		$ (17,395)	$ 1,057	$ (13,370)	$ 19,922
Denominator (in thousands):
Weighted average shares outstanding (in shares)		29,083	23,710	25,777	23,710
Dilutive share-based awards (in shares)		0	822	0	822
Total weighted average shares outstanding, including dilutive shares (in shares)		29,083	24,532	25,777	24,532
Basic earnings (losses) per share (in dollars per share)		$ (0.60)	$ 0.04	$ (0.52)	$ 0.84
Diluted earnings (losses) per share (in dollars per share)		$ (0.60)	$ 0.04	$ (0.52)	$ 0.81
Antidilutive securities excluded from computation of earnings per share (in shares)		1,181		959
Predecessor
Numerator:
Net income (loss) attributable to Charah Solutions, Inc.	$ (5,528)