Hill International (HIL) 10-Q 8 Nov 13 2013 Q3 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	9 Months Ended
	Sep. 30, 2013	Nov. 01, 2013
Document and Entity Information	'	'
Entity Registrant Name	'Hill International, Inc.	'
Entity Central Index Key	'0001287808	'
Document Type	'10-Q	'
Document Period End Date	30-Sep-13	'
Amendment Flag	'false	'
Current Fiscal Year End Date	'--12-31	'
Entity Current Reporting Status	'Yes	'
Entity Filer Category	'Accelerated Filer	'
Entity Common Stock, Shares Outstanding	'	39,458,609
Document Fiscal Year Focus	'2013	'
Document Fiscal Period Focus	'Q3	'

CONSOLIDATED_BALANCE_SHEETS

CONSOLIDATED BALANCE SHEETS (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Assets	'	'
Cash and cash equivalents	$26,639	$16,716
Cash - restricted	13,212	12,091
Accounts receivable, less allowance for doubtful accounts of $9,280 and $10,268	236,014	211,176
Accounts receivable - affiliate	1,244	1,260
Prepaid expenses and other current assets	14,885	10,395
Income taxes receivable	4,165	3,445
Deferred income tax assets	2,095	2,187
Total current assets	298,254	257,270
Property and equipment, net	10,685	11,268
Cash - restricted, net of current portion	3,589	9,135
Retainage receivable	4,130	3,946
Acquired intangibles, net	25,141	28,248
Goodwill	83,112	84,007
Investments	8,025	8,275
Deferred income tax assets	12,983	14,426
Other assets	5,238	5,098
Total assets	451,157	421,673
Liabilities and Stockholders' Equity	'	'
Due to bank	'	21
Current maturities of notes payable	20,583	21,769
Accounts payable and accrued expenses	94,497	90,306
Income taxes payable	4,813	6,955
Deferred revenue	19,355	17,156
Deferred income taxes	125	101
Other current liabilities	10,313	13,827
Total current liabilities	149,686	150,135
Notes payable, net of current maturities	111,647	87,666
Retainage payable	4,175	4,163
Deferred income taxes	18,163	17,675
Deferred revenue	16,720	9,652
Other liabilities	8,270	11,279
Total liabilities	308,661	280,570
Commitments and contingencies	'	'
Stockholders' equity:	'	'
Preferred stock, $.0001 par value; 1,000 shares authorized, none issued	'	'
Common stock, $.0001 par value; 100,000 shares authorized, 45,892 shares and 45,097 shares issued at September 30, 2013 and December 31, 2012, respectively	5	5
Additional paid-in capital	134,262	129,913
Retained earnings	48,304	45,409
Accumulated other comprehensive loss	-24,321	-20,015
Shareholders' equity before treasury stocks and noncontrolling interest	158,250	155,312
Less treasury stock of 6,434 shares, at cost	-27,766	-27,766
Hill International, Inc. share of equity	130,484	127,546
Noncontrolling interests	12,012	13,557
Total equity	142,496	141,103
Total liabilities and stockholders' equity	$451,157	$421,673

CONSOLIDATED_BALANCE_SHEETS_Pa

CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, except Per Share data, unless otherwise specified
CONSOLIDATED BALANCE SHEETS	'	'
Accounts receivable, allowance for doubtful accounts (in dollars)	$9,280	$10,268
Preferred stock, par value (in dollars per share)	$0.00	$0.00
Preferred stock, shares authorized	1,000	1,000
Preferred stock, shares issued	0	0
Common stock, par value (in dollars per share)	$0.00	$0.00
Common stock, shares authorized	100,000	100,000
Common stock, shares issued	45,892	45,097
Treasury stock, shares	6,434	6,434

CONSOLIDATED_STATEMENTS_OF_OPE

CONSOLIDATED STATEMENTS OF OPERATIONS (USD $)	3 Months Ended		9 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
CONSOLIDATED STATEMENTS OF OPERATIONS	'	'	'	'
Consulting fee revenue	$130,181	$103,565	$381,164	$306,831
Reimbursable expenses	17,013	16,322	50,567	48,297
Total revenue	147,194	119,887	431,731	355,128
Cost of services	75,734	58,459	223,789	176,722
Reimbursable expenses	17,013	16,322	50,567	48,297
Total direct expenses	92,747	74,781	274,356	225,019
Gross profit	54,447	45,106	157,375	130,109
Selling, general and administrative expenses	46,195	40,016	131,884	124,559
Operating profit	8,252	5,090	25,491	5,550
Interest expense and related financing fees, net	5,489	4,757	17,257	12,748
Earnings (loss) before income taxes	2,763	333	8,234	-7,198
Income tax (benefit) expense	-179	-1,109	3,983	-2,621
Net earnings (loss)	2,942	1,442	4,251	-4,577
Less: net earnings - noncontrolling interests	386	138	1,356	1,179
Net earnings (loss) attributable to Hill International, Inc.	$2,556	$1,304	$2,895	($5,756)
Basic earnings (loss) per common share - Hill International, Inc. (in dollars per share)	$0.06	$0.03	$0.07	($0.15)
Basic weighted average common shares outstanding (in shares)	39,351	38,226	38,949	38,446
Diluted earnings (loss) per common share - Hill International, Inc. (in dollars per share)	$0.06	$0.03	$0.07	($0.15)
Diluted weighted average common shares outstanding (in shares)	39,494	38,566	39,135	38,446

CONSOLIDATED_STATEMENTS_OF_COM

CONSOLIDATED STATEMENTS OF COMPREHENSIVE EARNINGS (LOSS) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
CONSOLIDATED STATEMENTS OF COMPREHENSIVE EARNINGS (LOSS)	'	'	'	'
Net earnings (loss)	$2,942	$1,442	$4,251	($4,577)
Foreign currency translation adjustment, net of tax	-1,063	556	-6,228	-1,424
Other, net	7	-236	115	-385
Comprehensive earnings (loss)	1,886	1,762	-1,862	-6,386
Comprehensive (loss) attributable to noncontrolling interest	-139	-69	-451	-44
Comprehensive earnings (loss) attributable to Hill International, Inc.	$2,025	$1,831	($1,411)	($6,342)

CONSOLIDATED_STATEMENTS_OF_CAS

CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012
Cash flows from operating activities:	'	'
Net earnings (loss)	$4,251	($4,577)
Adjustments to reconcile net earnings (loss) to net cash provided by (used in) operating activities:	'	'
Depreciation and amortization	7,921	9,245
Provision for bad debts	2,743	1,721
Interest accretion	5,875	'
Deferred tax provision (benefit)	1,035	-6,557
Share based compensation	2,257	1,931
Changes in operating assets and liabilities, net of acquisition in 2013:	'	'
Restricted cash	986	-6,020
Accounts receivable	-21,594	-13,525
Accounts receivable - affiliate	16	563
Prepaid expenses and other current assets	-4,184	-1,309
Income taxes receivable	-608	-1,687
Retainage receivable	-184	741
Other assets	345	2,509
Accounts payable and accrued expenses	1,179	13,962
Income taxes payable	-2,475	-629
Deferred revenue	12,177	262
Other current liabilities	3,154	-6
Retainage payable	9	-1,573
Other liabilities	-4,018	-571
Net cash provided by (used in) operating activities	8,885	-5,520
Cash flows from investing activities:	'	'
Cash received from acquisition	727	'
Distribution from affiliate	'	130
Contribution to affiliate	-8	'
Sale of investment	'	3,149
Payments for purchase of property and equipment	-2,144	-1,806
Payment of liability for additional interest in Gerens Hill	-9,325	'
Net cash (used in) provided by investing activities	-10,750	1,473
Cash flows from financing activities:	'	'
Due to bank	-21	-1,197
Proceeds from notes payable	'	3,697
Payment on Engineering S.A. note payable	-5,095	'
Payment on notes payable	-148	-5,790
Dividends paid to noncontrolling interest	'	-1,378
Net borrowings on revolving loans	22,279	5,781
Proceeds from stock issued under employee stock purchase plan	53	70
Proceeds from exercise of stock options	20	24
Net cash provided by financing activities	17,088	1,207
Effect of exchange rate changes on cash	-5,300	-290
Net increase (decrease) in cash and cash equivalents	9,923	-3,130
Cash and cash equivalents - beginning of period	16,716	17,924
Cash and cash equivalents - end of period	$26,639	$14,794

The_Company

The Company	9 Months Ended
	Sep. 30, 2013
The Company	'
The Company	'
	Note 1 - The Company
	Hill International, Inc. (“Hill” or the “Company”) is a professional services firm headquartered in Marlton, New Jersey that provides project management and construction claims services to clients worldwide.  Hill’s clients include the U.S. federal government, U.S. state and local governments, foreign governments and the private sector.  The Company is organized into two key operating divisions: the Project Management Group and the Construction Claims Group.

Basis_of_Presentation

Basis of Presentation	9 Months Ended
	Sep. 30, 2013
Basis of Presentation	'
Basis of Presentation	'
	Note 2 — Basis of Presentation
	The accompanying unaudited interim consolidated financial statements were prepared in accordance with the rules and regulations of the Securities and Exchange Commission pertaining to reports on Form 10-Q and should be read in conjunction with the consolidated financial statements and accompanying notes included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2012.  Accordingly, they do not include all of the information and footnotes required by accounting principles generally accepted in the United States (“GAAP”) for complete financial statements.  In the opinion of management, these statements include all adjustments (consisting only of normal, recurring adjustments) necessary for a fair presentation of the consolidated financial statements.
	The consolidated financial statements include the accounts of Hill and its wholly- and majority-owned subsidiaries.  All intercompany balances and transactions have been eliminated in consolidation.
	The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period.  Actual results could differ from those estimates.  The interim operating results are not necessarily indicative of the results for a full year.

Acquisitions

Acquisitions	9 Months Ended
	Sep. 30, 2013
Acquisitions	'
Acquisitions	'
	Note 3 — Acquisitions
	Binnington Copeland & Associates
	On May 30, 2013 (the “Closing Date”), Hill International N.V., the Company’s wholly-owned subsidiary, acquired all of the outstanding common stock of Binnington Copeland & Associates (Pty.) Ltd. and BCA Training (Pty.) Ltd. (together “BCA”).  BCA, with 34 professionals, has offices in Johannesburg and Cape Town, South Africa.  The acquisition provides the Company’s claims business access to Africa’s large infrastructure and mining projects and allows for expansion into the rest of sub-Saharan Africa.  Consideration consisted of $2,000,000 plus a potential earn out, both payable in shares of the Company’s common stock.  The purchase price is payable as follows: $1,072,400 (the “Closing Date Payment”) on the Closing Date, $927,600 (the “Second Tranche Payment”) on July 31, 2013 and an earn-out (the “Third Tranche Payment”) to be determined in the third quarter of 2014.  The Company issued 379,655 shares of its common stock in satisfaction of the Closing Date Payment; the number of shares was determined by dividing the Closing Date Payment by the average closing price of our common stock for the thirty trading days ending on May 17, 2013.  On July 31, 2013, the Company issued 331,444 shares of its common stock in satisfaction of the Second Tranche Payment.  The number of shares was determined by dividing the Second Tranche Payment by the average closing price of our common stock for the thirty trading days ending on July 19, 2013.  The shares issuable in satisfaction of the Third Tranche Payment will be determined by dividing the Third Tranche Payment by the average closing price of our common stock for the thirty trading days ending on July 21, 2014.  The actual amount of the Third Tranche Payment will be determined by comparing the average net profit before taxes for the two-year periods ending July 31, 2014 to the net profit before taxes for the year ended July 31, 2012, and multiplying the excess, if any, by 2.205.  The Third Tranche Payment is estimated to be approximately $902,000.  The Company reflected the liability for the Third Tranche Payment in other current liabilities in the consolidated balance sheet at September 30, 2013.  The Company acquired intangible assets and goodwill amounting to 13,143,000 South African Rand (ZAR) (approximately $1,312,000 on the acquisition date) and ZAR 12,872,500 ($1,284,000), respectively.  The acquired intangible assets have a weighted average life of 8.2 years.  The acquired intangible assets consist of a client relationship intangible of ZAR 10,546,000 ($1,053,000) with a ten-year life, a contract intangible of ZAR 1,863,000 ($186,000) with an 8-month life and a trade name intangible of ZAR 734,000 ($73,000) with a two-year life.  Goodwill, which is not deductible for income tax purposes, has been allocated to the Construction Claims operating segment.  The results of operations of BCA are not material to the Company’s consolidated results of operations.
	Gerens Hill International, S.A.
	In April 2013, minority shareholders, who held the remaining 6.8% of Gerens Hill, exercised their put options.  The Company accrued the liability of approximately €1,915,000 (approximately $2,526,000) which is included in other current liabilities in the consolidated balance sheet at September 30, 2013. In connection with this transaction, the Company reduced noncontrolling interests by €829,000 (approximately $1,094,000), has increased goodwill and deferred tax liabilities by €326,000 each (approximately $430,000) and has increased intangible assets by €1,086,000 (approximately $1,432,000).  The aggregate consideration is expected to be paid in December 2013.

Accounts_Receivable

Accounts Receivable	9 Months Ended
	Sep. 30, 2013
Accounts Receivable	'
Accounts Receivable	'
	Note 4 — Accounts Receivable
	The components of accounts receivable are as follows (in thousands):
		September 30, 2013			December 31, 2012
	Billed	$	205,238		$	181,075
	Retainage, current portion	7,282			5,022
	Unbilled	32,774			35,347
		245,294			221,444
	Allowance for doubtful accounts	(9,280		)	(10,268		)
		$	236,014		$	211,176
	During the past several months, accounts receivable related to work performed by Hill prior to March 2011 pursuant to contracts with the Libyan government were reduced by approximately $3,100,000.  The reduction consisted of a cash payment by the Libyan Organization for the Development of Administrative Centres (“ODAC”) of approximately 3,000,000 Libyan dinars (“LYD”) ($2,400,000) that was made directly to Hill and a cash payment of approximately LYD 800,000 ($700,000) that was made by ODAC to Libyan tax authorities on Hill’s behalf.  At September 30, 2013, the remaining accounts receivable outstanding related to Hill’s work in Libya amounted to approximately $57,000,000.
	The LYD 3,000,000 cash payment made directly to Hill is not freely convertible into other currencies.  As a result, this cash remains in Hill’s Libyan bank account.  There is at present no agreement, understanding or timetable for further payments of Hill’s accounts receivable from ODAC or a return to work on Hill’s existing contracts.  However, management believes that these payments were made in good faith and are a positive indication that ODAC intends to satisfy its obligations to Hill.  However, the Company cannot predict with certainty when, or if, the remaining accounts receivable will be paid by the Libyan authorities or when work will resume there.  In the event that the Company does not realize any further payments, there could be a significant adverse impact on its consolidated results of operations and consolidated financial position.

Intangible_Assets

Intangible Assets	9 Months Ended
	Sep. 30, 2013
Intangible Assets	'
Intangible Assets	'
	Note 5 — Intangible Assets
	The following table summarizes the Company’s acquired intangible assets (in thousands):
			September 30, 2013						December 31, 2012
			Gross						Gross
			Carrying			Accumulated			Carrying			Accumulated
			Amount			Amortization			Amount			Amortization
	Client relationships		$	37,019		$	17,033		$	36,506		$	14,175
	Acquired contract rights		10,946			8,216			10,449			6,931
	Trade names		3,248			823			3,042			643
	Total		$	51,213		$	26,072		$	49,997		$	21,749
	Intangible assets, net		$	25,141					$	28,248
	Amortization expense related to intangible assets was as follows (in thousands):
	Three Months Ended September 30,						Nine Months Ended September 30,
	2013			2012			2013			2012
	$	1,723		$	1,835		$	4,957		$	5,947
	The following table presents the estimated amortization expense based on our present intangible assets for the next five years (in thousands):
			Estimated
			amortization
	Year ending December 31,		expense
	2013 (remaining 3 months)		$	1,613
	2014		5,526
	2015		5,139
	2016		3,926
	2017		3,044

Goodwill

Goodwill	9 Months Ended
	Sep. 30, 2013
Goodwill	'
Goodwill	'
	Note 6 — Goodwill
	The Company performs its annual goodwill impairment testing, by reporting unit, in the third quarter, or more frequently if events or changes in circumstances indicate that goodwill may be impaired. Application of the goodwill impairment test requires significant judgments including estimation of future cash flows, which is dependent on internal forecasts, estimation of the long-term rate of growth for the businesses, the useful life over which cash flows will occur, and determination of the Company’s weighted average cost of capital. Changes in these estimates and assumptions could materially affect the determination of fair value and/or conclusions on goodwill impairment for each reporting unit. The Company performed its annual impairment test effective July 1, 2013 and noted no impairment for either of its reporting units. Based on a preliminary valuation, the fair value of the Project Management unit and the Construction Claims unit exceeded their carrying values by $55,966,000 and $7,905,000, respectively.
	The following table summarizes the changes in the Company’s carrying value of goodwill during 2013 (in thousands):
		Project			Construction
		Management			Claims			Total
	Balance, December 31, 2012	$	57,231		$	26,776		$	84,007
	Additions	430			1,284			1,714
	Translation adjustments	(1,915		)	(694		)	(2,609		)
	Balance, September 30, 2013	$	55,747		$	27,366		$	83,112

Accounts_Payable_and_Accrued_E

Accounts Payable and Accrued Expenses	9 Months Ended
	Sep. 30, 2013
Accounts Payable and Accrued Expenses	'
Accounts Payable and Accrued Expenses	'
	Note 7 — Accounts Payable and Accrued Expenses
	Below are the components of accounts payable and accrued expenses (in thousands):
		September 30, 2013		December 31, 2012
	Accounts payable	$	29,700	$	24,486
	Accrued payroll	35,484		33,750
	Accrued subcontractor fees	6,760		8,253
	Accrued agency fees	16,684		16,239
	Accrued legal and professional fees	1,252		3,303
	Other accrued expenses	4,617		4,275
		$	94,497	$	90,306

Notes_Payable_and_LongTerm_Deb

Notes Payable and Long-Term Debt	9 Months Ended
	Sep. 30, 2013
Notes Payable and Long-Term Debt	'
Notes Payable and Long-Term Debt	'
	Note 8 — Notes Payable and Long-Term Debt
	Outstanding debt obligations are as follows (in thousands):
		September 30, 2013			December 31, 2012
	Term Loan (for more information, see below)	$	82,395		$	76,520
	Revolving Credit loan payable under the Credit Agreement. The weighted average interest rate of all borrowings was 6.79% and 7.78% at September 30, 2013 and December 31, 2012 (for more information, see below)	37,900			22,300
	Borrowings under revolving credit facilities with a consortium of banks in Spain (for more information, see below)	7,472			5,021
	Payment due for the Engineering S.A. acquisition	—			5,327
	Borrowings under unsecured credit facility with Caja Badajoz (for more information, see below)	2,024			—
	Borrowings under revolving credit facility with the National Bank of Abu Dhabi (for more information, see below)	2,332			—
	Other debt obligations	107			267
		132,230			109,435
	Less current maturities	20,583			21,769
	Notes payable and long-term debt, net of current maturities	$	111,647		$	87,666
	Term Loan Agreement
	The Company entered into a Term Loan Agreement on October 18, 2012, which was amended on May 23, 2013 (the “First Amendment”). The First Amendment contains identical provisions as those in the Fourth Amendment to Credit Agreement (see below).  Borrowings under the Term Loan Agreement are collateralized by a second lien on substantially all of the Company’s assets, including, without limitation, accounts receivable, equipment, securities, financial assets and the proceeds of the foregoing, as well as by a pledge of 65% of the outstanding capital stock of our wholly-owned subsidiary, Hill International N.V. and of certain of our other foreign subsidiaries.  The maturity date of the Term Loan is October 18, 2016.
	The Company will pay interest on amounts outstanding from time to time under the Term Loan at a rate per annum equal to 7.50%, however, such rate may be increased to 9.50% per annum if fixed price contracts (as defined under the Term Loan Agreement) or certain accounts receivable of the Company and its subsidiaries exceed percentages specified in the Term Loan Agreement.
	Also, contemporaneous with its entry into the Term Loan Agreement, the Company entered into a Fee Letter.  The Fee Letter requires the Company to pay to the Lenders an exit fee (the “Exit Fee”), which fee shall be earned in full on the Closing Date and due and payable on the date the Term Loan is paid in full (the “Exit Date”).  “Exit Fee” means the amount, if any, when paid to the Term Loan Lenders on the Exit Date, that will result in the internal annual rate of return to the Term Loan Lenders on the Exit Date being equal to, but no greater than, 20%; provided that in no event shall the Exit Fee Amount be less than $0 or greater than $11,790,000.  The IRR is to be calculated as the rate of return earned by the Term Loan Lenders on their initial investment in the Term Loan (to be calculated as the principal amount of the Term Loan less the Closing Fee of $25,000,000) through the Exit Date taking into account the payment by the Company to the Term Loan Lenders of all principal, interest and other payments to the Term Loan Lenders pursuant to the Term Loan Agreement.
	At September 30, 2013, the Company was in compliance with all of the Term Loan covenants.
	Revolving Credit Agreement
	The Company entered into a Credit Agreement, dated June 30, 2009 (the “Credit Agreement”), with Bank of America, N.A., Capital One, N.A., The PrivateBank and Trust Company, PNC Bank N.A., and Bank of America, N.A., as Administrative Agent.  The Credit Agreement has been amended from time to time, most recently on May 23, 2013 when the Company entered into a Fourth Amendment to Credit Agreement pursuant to which, among other things, the lenders agreed to :  (a) permit the Company to enter into an agreement with Qatar National Bank for the issuance of letters of credit (“LCs”) not to exceed $17,000,000, (b) increase the limit on LCs available to the Company’s foreign subsidiaries who are not loan parties from $4,000,000 to $11,800,000 and (c) permit the Company to provide up to $20,000,000 as cash collateral for letters of credit and performance bonds.  The Company paid an amendment fee of $150,000 to the Agent and reimbursed the Agent for its out-of-pocket costs amounting to approximately $372,000.  These amounts are included in interest expense and related financing fees, net in the consolidated statements of operations for the nine-month period ended September 30, 2013.
	The Credit Agreement requires the Company to comply with a consolidated leverage ratio, a consolidated fixed charge ratio and a senior leverage ratio.  The following table sets forth those requirements for the period ended September 30, 2013:
	Consolidated Leverage Ratio	Consolidated Fixed Charge Ratio		Senior Leverage Ratio
	Not to exceed 6.00 to 1.00	Not less 1.00 to 1.00		Not to exceed 2.25 to 1.00
	The following table presents the Company’s actual ratios at September 30, 2013:
	Consolidated Leverage Ratio	Consolidated Fixed Charge Ratio		Senior Leverage Ratio
	4.54 to 1.00	1.31 to 1.00		1.83 to 1.00
	At September 30, 2013, the Company had $17,484,000 in outstanding letters of credit pursuant to the Credit Agreement and total remaining availability on such date was $9,616,000.
	Other Debt Arrangements
	The Company’s subsidiary, Gerens Hill, maintains a revolving credit facility with 12 banks in Spain providing for total borrowings, with interest at 6.50%, of up to €5,640,000 (approximately $7,611,000 and $7,460,000 at September 30, 2013 and December 31, 2012).  At September 30, 2013 and December 31, 2012, total borrowings outstanding were €5,537,000 and €3,796,000 (approximately $7,472,000 and $5,021,000, respectively).
	Gerens Hill also maintains an unsecured credit facility with the Caja Badajoz bank in Spain for €1,500,000 (approximately $2,024,000 and $1,984,000) at September 30, 2013 and December 31, 2012, respectively.  The interest rate at September 30, 2013 is the three-month EURIBOR rate of 0.54% plus 3.00% (or 3.54%) but no less than 5.00%.  At September 30, 2013, total borrowings outstanding were €1,500,000 (approximately $2,024,000).  At December 31, 2012, there were no borrowings outstanding.
	The Company maintains a credit facility with the National Bank of Abu Dhabi which provides for total borrowings of up to AED 11,500,000 (approximately $3,131,000 at both September 30, 2013 and December 31, 2012) collateralized by certain overseas receivables.  The interest rate is the one-month Emirates InterBank Offer Rate plus 3.00% (or 4.25% and 4.30%, at September 30, 2013 and December 31, 2012, respectively) but no less than 5.50%.  At September 30, 2013, total borrowings outstanding were AED 8,564,000 (approximately $2,332,000).  At December 31, 2012, there were no borrowings outstanding.  This facility is renewed on a month-to-month basis. The credit facility with the National Bank of Abu Dhabi also allows for up to AED 150,000,000 (approximately $40,844,000 at September 30, 2013) in letters of guarantee of which AED 115,987,000 (approximately $31,583,000) was utilized at September 30, 2013.
	The Company also maintains a revolving credit facility with Egnatia Bank for up to €1,000,000 (approximately $1,351,000 at September 30, 2013), with interest of 1.23% plus Egnatia Bank’s prime rate of 5.00% (or 6.23%) at September 30, 2013, collateralized by certain assets of the Company.  There were no borrowings outstanding under this facility at September 30, 2013 and December 31, 2012.  The facility also allows for letters of guarantee up to €4,500,000 (approximately $6,080,000 at September 30, 2013), of which €1,745,000 (approximately $2,357,000 had been utilized at September 30, 2013.
	Engineering S.A. maintains three unsecured revolving credit facilities with two banks in Brazil aggregating 2,900,000 Brazilian Reais (BRL) (approximately $1,288,000 at September 30, 2013), with a weighted average monthly interest rate of 2.64%.  There were no borrowings outstanding on any of these facilities at September 30, 2013 or December 31, 2012.
	A revolving credit facility with Barclays Bank PLC for up to £550,000 (approximately $889,000 at September 30, 2013), with interest of 2.00% plus the Bank of England rate of 0.50% (or 2.50%) at September 30, 2013, collateralized by cross guarantees of several of the United Kingdom companies.  Aggregate of all debt owing to the bank will be, at all times, covered 3 times by the aggregate value of the UK accounts receivable less than 90 days old and excluding any receivables which are due from any associate, subsidiary or overseas client.  At September 30, 2013 and December 31, 2012, there were no borrowings outstanding.
	At September 30, 2013, the Company had $4,466,000 of available borrowing capacity under its foreign credit agreements.
	In connection with the 2011 acquisition of Engineering S.A., the Company incurred indebtedness to the sellers amounting to 17,200,000 BRL (approximately $10,376,000 at the date of acquisition) and discounted that amount using an interest rate of 4.72%, the Company’s weighted average interest rate at that time.  The Company paid the first installment amounting to 6,624,000 BRL (approximately $3,508,000) on April 30, 2012 and paid the second installment amounting to 11,372,000 BRL (approximately $5,095,000) on July 23, 2013.

Supplemental_Cash_Flow_Informa

Supplemental Cash Flow Information	9 Months Ended
	Sep. 30, 2013
Supplemental Cash Flow Information	'
Supplemental Cash Flow Information	'
	Note 9 — Supplemental Cash Flow Information
	The following table provides additional cash flow information (in thousands):
		Nine months ended September 30,
		2013		2012
	Interest and related financing fees paid	$	10,346	$	8,670
	Income taxes paid	$	6,901	$	3,947
	Reduction of minority interest in connection with acquisition of remaining noncontrolling interest in Gerens Hill	$	1,094	$	—
	Increase in intangible assets and goodwill in connection with acquisition of BCA and remaining noncontrolling interest in Gerens Hill	$	3,026	$	—
	Common stock issued for acquisition of BCA	$	2,000	$	—

Earnings_Loss_per_Share

Earnings (Loss) per Share	9 Months Ended
	Sep. 30, 2013
Earnings (Loss) per Share	'
Earnings (Loss) per Share	'
	Note 10 — Earnings (Loss) per Share
	Basic earnings (loss) per common share has been computed using the weighted-average number of shares of common stock outstanding during the period.  Diluted loss per common share incorporates the incremental shares issuable upon the assumed exercise of stock options, if dilutive.  Dilutive stock options increased the average common stock outstanding by 143,528 shares for the three-month period ended September 30, 2013 and by 185,809 shares for the nine-month period ended September 30, 2013. Options to purchase 5,492,975 shares and 5,366,904 shares were excluded from the calculation of diluted earnings (loss) per common share for the three- and nine-month periods ended September 30, 2013 because they were antidilutive.  Dilutive stock options increased the average common stock outstanding by 339,850 shares for the three-month period ended September 30, 2012. Stock options were excluded from the calculation of diluted loss per common share because their effect was antidilutive for the nine-month period ended September 30, 2012.  The total number of such shares excluded from diluted loss per common share was 3,421,201 shares for the nine-month period ended September 30, 2012.

ShareBased_Compensation

Share-Based Compensation	9 Months Ended
	Sep. 30, 2013
Share-Based Compensation	'
Share-Based Compensation	'
	Note 11 — Share-Based Compensation
	At September 30, 2013, the Company had 6,650,156 options outstanding with a weighted average exercise price of $4.73.  During the nine-month period ended September 30, 2013, the Company granted 1,000,000 options which vest over a four-year period, have an exercise price of $4.04 and a contractual life of five years; 960,000 options which vest over a five-year period, have a weighted average exercise price of $3.66 and a contractual life of seven years; and 116,280 options which vested immediately, have an exercise price of $2.89 and a contractual life of five years.  The aggregate fair value of the options was $4,039,000 calculated using the Black-Scholes valuation model.  The weighted average assumptions used to calculate fair value were: expected life — 4.29 years; volatility — 71.7% and risk-free interest rate — 0.77%. During the first nine months of 2013, options for 8,000 shares with a weighted average exercise price of $2.45 were exercised, options for 11,000 shares with a weighted average exercise price of $4.97 were forfeited and options for 51,500 shares with a weighted average exercise price of $12.03 lapsed.
	During the nine-month period ended September 30, 2013, the Company issued 51,905 shares of its common stock to its Non-Employee Directors.  The Company recognized compensation expense amounting to $150,000.
	During the nine-month period ended September 30, 2013, employees purchased 23,823 common shares, for an aggregate purchase price of $53,000, pursuant to the Company’s 2008 Employee Stock Purchase Plan.
	The Company recognized share-based compensation expense in selling, general and administrative expenses in the consolidated statement of operations totaling $674,000 and $493,000 for the three-month periods ended September 30, 2013 and 2012, respectively, and $2,257,000 and $1,931,000 for the nine-month periods ended September 30, 2013 and 2012, respectively.

Stockholders_Equity

Stockholders' Equity	9 Months Ended
	Sep. 30, 2013
Stockholders' Equity	'
Stockholders' Equity	'
	Note 12 — Stockholders’ Equity
	Under the Board-approved Stock Repurchase Program, the Company is authorized to purchase up to $60,000,000 of its common stock.  On August 5, 2013, the Board authorized an extension of the program to December 31, 2014. To date, the Company has purchased 5,834,369 shares of its common stock under this program for an aggregate purchase price of $24,438,000, or an average price of $4.19 per share.  Under the terms of its Credit Agreement (see Note 8), the Company may purchase up to an additional $2,000,000 as long as immediately before and after giving effect to the purchase, the Company shall have satisfied the Minimum Liquidity Requirement (that is, unrestricted cash and cash equivalents plus availability under the Credit Agreement aggregating $30,000,000) and no event of default shall have occurred and be continuing at the time.
	The following table summarizes the changes in stockholders’ equity during the nine months ended September 30, 2013 (in thousands):
					Hill International,			Noncontrolling
		Total			Inc. stockholders			interests
	Stockholders’ equity, December 31, 2012	$	141,103		$	127,546		$	13,557
	Net earnings	4,251			2,895			1,356
	Other comprehensive loss	(6,113		)	(4,306		)	(1,807		)
	Comprehensive loss	(1,862		)	(1,411		)	(451		)
	Additional paid in capital	4,349			4,349			—
	Purchase of noncontrolling interest	(1,094		)	—			(1,094		)
	Stockholders’ equity, September 30, 2013	$	142,496		$	130,484		$	12,012

Income_Taxes

Income Taxes	9 Months Ended
	Sep. 30, 2013
Income Taxes	'
Income Taxes	'
	Note 13 — Income Taxes
	The reserve for uncertain tax positions amounted to $2,560,000 and $5,033,000 at September 30, 2013 and December 31, 2012, respectively, and is included in “Other Liabilities” in the consolidated balance sheets at those dates. During the three- and nine-month periods ended September 30, 2013, the reserve for uncertain tax positions was reduced by $2,473,000 based on management’s assessment that these items were effectively settled with the appropriate foreign tax authorities during the third quarter of 2013.
	The Company’s policy is to record income tax related interest and penalties in income tax expense.  At September 30, 2013, potential interest and penalties related to uncertain tax positions amounting to $100,000 was included in the balance above.
	The effective income tax rates for the three-month periods ended September 30, 2013 and 2012 were (6.5%) and (333.0%), respectively, and 48.4% and 36.4% for the nine-month periods ended September 30, 2013 and 2012, respectively.  The differences in the Company’s 2013 effective tax rates over the 2012 effective tax rates were primarily the result of not recording an income tax benefit related to the 2013 U.S. net operating loss which management believes the Company will not be able to utilize offset by the $2,473,000 reversal of the reserve for uncertain tax positions discussed above. The Company also recognized an income tax (benefit) expense resulting from adjustments to agree the prior year’s book amounts to the actual amounts per the tax returns totaling ($105,000) and ($195,000) for the three-month periods ended September 30, 2013 and 2012, respectively, and $40,000 and ($195,000) for the nine-month periods ended September 30, 2013 and 2012, respectively.
	In assessing the realizability of deferred tax assets, management considers whether it is more likely than not that some portion or all of the deferred tax assets will not be realized.  The ultimate realization of deferred tax assets is dependent upon the generation of future taxable income during the periods in which those temporary differences become deductible.  Management evaluates the need for valuation allowances on the deferred tax assets according to the provisions of ASC740, Income Taxes.  They consider both positive and negative evidence.  In making this determination, management assesses all of the evidence available at the time including recent earnings, internally-prepared income projects, and historical financial performance.  Based upon this evaluation, management believes that it is more likely than not that the Company will not be able to utilize its U.S. related deferred tax assets.  As a consequence, the Company recorded an additional valuation allowance reserve on its estimated U.S. deferred tax assets recorded in 2013.

Business_Segment_Information

Business Segment Information	9 Months Ended
	Sep. 30, 2013
Business Segment Information	'
Business Segment Information	'
	Note 14 — Business Segment Information
	The Company’s business segments reflect how executive management makes resource decisions and assesses its performance. The Company bases these decisions on the type of services provided (Project Management and Construction Claims) and secondarily by their geography (U.S./Canada, Latin America, Europe, the Middle East, Africa and Asia/Pacific).
	The Project Management business segment provides extensive construction and project management services to construction owners worldwide. Such services include program management, project management, construction management, project management oversight, troubled project turnaround, staff augmentation, project labor agreement consulting, commissioning, estimating and cost management, and labor compliance services.
	The Construction Claims business segment provides such services as claims consulting, management consulting, litigation support, expert witness testimony, cost/damages assessment, delay/disruption analysis, adjudication, lender advisory, risk management, forensic accounting, fraud investigation and project neutral services to clients worldwide.
	The Company evaluates the performance of its segments primarily on operating profit before corporate overhead allocations and income taxes.
	The following tables provide selected financial data for the Company’s reportable segments (dollars in thousands):
	Consulting Fee Revenue (“CFR”)
		Three Months Ended September 30,
		2013					2012
	Project Management	$	99,583		76.5	%	$	77,194	74.5	%
	Construction Claims	30,598			23.5		26,371		25.5
	Total	$	130,181		100	%	$	103,565	100	%
	Total Revenue:
		Three Months Ended September 30,
		2013					2012
	Project Management	$	115,533		78.5	%	$	92,752	77.4	%
	Construction Claims	31,661			21.5		27,135		22.6
	Total	$	147,194		100	%	$	119,887	100	%
	Operating Profit:
		Three Months Ended September 30,
		2013			2012
	Project Management	$	11,290		$	8,012
	Construction Claims	3,806			2,641
	Corporate	(6,844		)	(5,563		)
	Total	$	8,252		$	5,090
	Depreciation and Amortization Expense:
		Three Months Ended September 30,
		2013			2012
	Project Management	$	1,930		$	2,173
	Construction Claims	741			688
	Subtotal segments	2,671			2,861
	Corporate	54			62
	Total	$	2,725		$	2,923
	Consulting Fee Revenue by Geographic Region:
		Three Months Ended September 30,
		2013					2012
	U.S./Canada	$	31,197		24	%	$	29,747	28.7	%
	Latin America	11,329			8.7		11,302		10.9
	Europe	18,211			14		20,710		20
	Middle East	56,588			43.5		34,119		32.9
	Africa	6,735			5.2		3,755		3.7
	Asia/Pacific	6,121			4.6		3,932		3.8
	Total	$	130,181		100	%	$	103,565	100	%
	U.S.	$	30,334		23.3	%	$	29,091	28.1	%
	Non-U.S.	99,847			76.7		74,474		71.9
	Total	$	130,181		100	%	$	103,565	100	%
	For the three-month period ended September 30, 2013, consulting fee revenue for the United Arab Emirates amounted to $16,017,000 representing 12.3% of the total and Oman’s consulting fee revenue amounted to $14,667,000 representing 11.3% of the total.  No other country other than the United States accounted for over 10% of consolidated consulting fee revenue.
	For the three-month period ended September 30, 2012, consulting fee revenue for the United Arab Emirates amounted to $14,888,000 representing 14.4% of the total.  No other country except for the United States accounted for over 10% of consolidated consulting fee revenue.
	Total Revenue by Geographic Region:
		Three Months Ended September 30,
		2013					2012
	U.S./Canada	$	44,204		30	%	$	42,687	35.6	%
	Latin America	11,429			7.8		11,341		9.5
	Europe	19,556			13.3		22,146		18.5
	Middle East	57,804			39.3		35,487		29.6
	Africa	7,637			5.2		4,252		3.5
	Asia/Pacific	6,564			4.4		3,974		3.3
	Total	$	147,194		100	%	$	119,887	100	%
	U.S.	$	43,327		29.4	%	$	42,003	35	%
	Non-U.S.	103,867			70.6		77,884		65
	Total	$	147,194		100	%	$	119,887	100	%
	For the quarter ended September 30, 2013, total revenue for the United Arab Emirates amounted to $16,182,000 representing 11.0% of the total and Oman’s total revenue amounted to $14,697,000 representing 10.0% of the total.  No other country except for the United States accounted for over 10% of consolidated total revenue.
	For the quarter ended September 30, 2012, total revenue for the United Arab Emirates amounted to $15,281,000, representing 12.7% of the total.  No other country other than the United States accounted for over 10% of consolidated total revenue.
Consulting Fee Revenue By Client Type:
	Three Months Ended September 30,
	2013					2012
U.S. federal government	$	3,722		2.9	%	$	3,234	3.1	%
U.S. state, regional and local governments	18,539			14.2		16,867		16.3
Foreign governments	47,516			36.5		24,843		24
Private sector	60,404			46.4		58,621		56.6
Total	$	130,181		100	%	$	103,565	100	%
Total Revenue By Client Type:
	Three Months Ended September 30,
	2013					2012
U.S. federal government	$	4,253		2.9	%	$	3,615	3	%
U.S. state, regional and local governments	24,901			16.9		23,535		19.6
Foreign governments	49,501			33.6		26,644		22.2
Private sector	68,539			46.6		66,093		55.2
Total	$	147,194		100	%	$	119,887	100	%
Property, Plant and Equipment, Net by Geographic Location:
	September 30, 2013			December 31, 2012
U.S./Canada	$	4,174		$	4,700
Latin America	1,320			1,278
Europe	1,928			2,334
Middle East	2,525			2,344
Africa	187			191
Asia/Pacific	551			421
Total	$	10,685		$	11,268
U.S.	$	4,174		$	4,697
Non-U.S.	6,511			6,571
Total	$	10,685		$	11,268
Consulting Fee Revenue (“CFR”)
	Nine Months Ended September 30,
	2013					2012
Project Management	$	293,560		77	%	$	227,510	74.1	%
Construction Claims	87,604			23		79,321		25.9
Total	$	381,164		100	%	$	306,831	100	%
Total Revenue
	Nine Months Ended September 30,
	2013					2012
Project Management	$	340,700		78.9	%	$	273,670	77.1	%
Construction Claims	91,031			21.1		81,458		22.9
Total	$	431,731		100	%	$	355,128	100	%
Operating Profit:
	Nine Months Ended September 30,
	2013			2012
Project Management	$	36,980		$	18,646
Construction Claims	9,629			6,345
Corporate	(21,118		)	(19,441		)
Total	$	25,491		$	5,550
Depreciation and Amortization Expense:
	Nine Months Ended September 30,
	2013			2012
Project Management	$	5,666		$	6,744
Construction Claims	2,082			2,303
Subtotal segments	7,748			9,047
Corporate	173			198
Total	$	7,921		$	9,245
Consulting Fee Revenue by Geographic Region:
	Nine Months Ended September 30,
	2013					2012
U.S./Canada	$	92,472		24.3	%	$	88,811	28.9	%
Latin America	36,385			9.5		37,510		12.2
Europe	57,888			15.2		63,670		20.8
Middle East	161,065			42.3		95,475		31.1
Africa	16,165			4.2		9,827		3.2
Asia/Pacific	17,189			4.5		11,538		3.8
Total	$	381,164		100	%	$	306,831	100	%
U.S.	$	89,792		23.6	%	$	86,528	28.2	%
Non-U.S.	291,372			76.4		220,303		71.8
Total	$	381,164		100	%	$	306,831	100	%
For the nine months ended September 30, 2013, consulting fee revenue for the United Arab Emirates amounted to $50,485,000 representing 13.2% of the total.  No other country except the United States accounted for over 10% of consolidated total revenue.
For the nine months ended September 30, 2012, consulting fee revenue for the United Arab Emirates amounted to $44,862,000 representing 14.6% of the total and Brazil’s consulting fee revenue amounted to $33,114,000 representing 10.8% of the total.  No other country except for the United States accounted for over 10% of the consolidated total revenue.
Total Revenue by Geographic Region:
	Nine Months Ended September 30,
	2013					2012
U.S./Canada	$	131,430		30.4	%	$	127,495	35.9	%
Latin America	36,677			8.5		37,696		10.6
Europe	61,471			14.2		68,470		19.3
Middle East	165,492			38.3		98,764		27.8
Africa	18,733			4.3		11,113		3.1
Asia/Pacific	17,928			4.3		11,590		3.3
Total	$	431,731		100	%	$	355,128	100	%
U.S.	$	128,652		29.8	%	$	125,134	35.2	%
Non-U.S.	303,079			70.2		229,994		64.8
Total	$	431,731		100	%	$	355,128	100	%
For the nine months ended September 30, 2013, total revenue for the United Arab Emirates amounted to $51,540,000 representing 11.9% of the total.  No other country except for the United States accounted for over 10% of consolidated consulting fee revenue.
For the nine months ended September 30, 2012, total revenue for the United Arab Emirates amounted to $45,939,000 representing 12.9% of the total.  No other country except for the United States accounted for over 10% of consolidated consulting fee revenue.
Consulting Fee Revenue By Client Type:
	Nine Months Ended September 30,
	2013					2012
U.S. federal government	$	11,613		3	%	$	9,414	3.1	%
U.S. state, regional and local governments	53,360			14		46,809		15.3
Foreign governments	129,608			34		68,519		22.3
Private sector	186,583			49		182,089		59.3
Total	$	381,164		100	%	$	306,831	100	%
Total Revenue By Client Type:
	Nine Months Ended September 30,
	2013					2012
U.S. federal government	$	13,436		3.1	%	$	11,332	3.2	%
U.S. state, regional and local governments	76,822			17.8		66,194		18.6
Foreign governments	135,426			31.4		73,395		20.7
Private sector	206,047			47.7		204,207		57.5
Total	$	431,731		100	%	$	355,128	100	%

Concentrations

Concentrations	9 Months Ended
	Sep. 30, 2013
Concentrations	'
Concentrations	'
	Note 15 — Concentrations
	The Company had one client that accounted for 10% of total revenue for the three-month period ended September 30, 2013 and no clients that accounted for 10% or more of total revenue for the three-month period ended September 30, 2012.  The Company had no clients that accounted for 10% or more of total revenue for the nine-month periods ended September 30, 2013 or 2012.
	The Company had one client that accounted for 11% of consulting fee revenue for the three-month period ended September 30, 2013 and no clients that accounted for 10% or more of consulting fee revenue for the three-month period ended September 30, 2012.  The Company had one client that accounted for 10% of consulting fee revenue for the nine-month period ended September 30, 2013 and no clients that accounted for 10% or more of consulting fee revenue for the nine-month periods ended September 30, 2012.
	One client, located in Libya, accounted for 24% and 28% of accounts receivable at September 30, 2013 and December 31, 2012.
	The Company has numerous contracts with U.S. federal government agencies that collectively accounted for 3% of total revenue during the three-month periods ended September 30, 2013 and 2012, and 3% of total revenue during each of the nine-month periods ended September 30, 2013 and 2012.

Commitments_and_Contingencies

Commitments and Contingencies	9 Months Ended
	Sep. 30, 2013
Commitments and Contingencies	'
Commitments and Contingencies	'
	Note 16 — Commitments and Contingencies
	General Litigation
	From time to time, the Company is a defendant or plaintiff in various legal actions which arise in the normal course of business.  As such the Company is required to assess the likelihood of any adverse outcomes to these matters as well as potential ranges of probable losses.  A determination of the amount of the provision required for these commitments and contingencies, if any, which would be charged to earnings, is made after careful analysis of each matter.  The provision may change in the future due to new developments or changes in circumstances.  Changes in the provision could increase or decrease the Company’s earnings in the period the changes are made.  It is the opinion of management, after consultation with legal counsel, that the ultimate resolution of these matters will not have a material adverse effect on the Company’s financial condition, results of operations or cash flows.
	Other
	M.A. Angeliades, Inc. (“Plaintiff”) has filed a complaint with the Supreme Court of New York against the Company and the New York City Department of Design and Construction (“DCC”) regarding payment of approximately $8,771,000 for work performed as a subcontractor to the Company plus interest and other costs. The Company has accrued approximately $2,340,000, including interest of $448,000, based on invoices received from Plaintiff who has refused to provide invoices for the additional work that Plaintiff claims to have performed. Until such time as the Company obtains invoices for the additional work and is able to provide those invoices to DCC for reimbursement or there is a full resolution of the litigation, it has no intention of paying Plaintiff. The Company believes that its position is defensible, however, there can be no assurance that it will receive a favorable verdict should this case proceed to trial.
	In April 2013, minority shareholders, who hold the remaining 6.8% of Gerens Hill, exercised their put options.  The Company intends to purchase their shares for approximately €1,915,000 (approximately $2,526,000).  See Note 3.
	The Company is committed to issue shares of its common stock to the former shareholders of BCA in satisfaction of the Third Tranche Payment, the amount of which will be determined in mid-2014. See Note 3.
	As of December 31, 2012, the Company had identified a potential employment tax liability related to certain foreign subsidiaries treatment of certain individuals as independent contractors rather than employees. On June 24, 2013, the Company received an indemnification from the selling shareholders for periods prior to 2013.  Accordingly, the Company has reversed the accrual established in 2012 and has reflected approximately $3,600,000 as a credit to selling, general and administrative expenses in the consolidated statement of operations for the nine-month period ended September 30, 2013.  In consideration for the indemnification, the Company reversed the 2013 first quarter write-down of the liability for the second installment obligation of approximately 1,950,000 BRL (approximately $873,000).  In addition, the Company believes, based upon certain professional advice, that it is remote that a future liability will be established for the potential employment taxes relating to certain foreign independent contractors and, therefore, has made no accrual for such potential liability.

Accounts_Receivable_Tables

Accounts Receivable (Tables)	9 Months Ended
	Sep. 30, 2013
Accounts Receivable	'
Components of accounts receivable	'
	The components of accounts receivable are as follows (in thousands):
		September 30, 2013			December 31, 2012
	Billed	$	205,238		$	181,075
	Retainage, current portion	7,282			5,022
	Unbilled	32,774			35,347
		245,294			221,444
	Allowance for doubtful accounts	(9,280		)	(10,268		)
		$	236,014		$	211,176

Intangible_Assets_Tables

Intangible Assets (Tables)	9 Months Ended
	Sep. 30, 2013
Intangible Assets	'
Summary of acquired intangible assets	'
	The following table summarizes the Company’s acquired intangible assets (in thousands):
			September 30, 2013						December 31, 2012
			Gross						Gross
			Carrying			Accumulated			Carrying			Accumulated
			Amount			Amortization			Amount			Amortization
	Client relationships		$	37,019		$	17,033		$	36,506		$	14,175
	Acquired contract rights		10,946			8,216			10,449			6,931
	Trade names		3,248			823			3,042			643
	Total		$	51,213		$	26,072		$	49,997		$	21,749
	Intangible assets, net		$	25,141					$	28,248
Summary of amortization expense related to intangible assets	'
	Amortization expense related to intangible assets was as follows (in thousands):
	Three Months Ended September 30,						Nine Months Ended September 30,
	2013			2012			2013			2012
	$	1,723		$	1,835		$	4,957		$	5,947
Estimated amortization expense of intangible assets for the next five years	'
	The following table presents the estimated amortization expense based on our present intangible assets for the next five years (in thousands):
			Estimated
			amortization
	Year ending December 31,		expense
	2013 (remaining 3 months)		$	1,613
	2014		5,526
	2015		5,139
	2016		3,926
	2017		3,044

Goodwill_Tables

Goodwill (Tables)	9 Months Ended
	Sep. 30, 2013
Goodwill	'
Summary of changes in carrying value of goodwill during 2013	'
	The following table summarizes the changes in the Company’s carrying value of goodwill during 2013 (in thousands):
		Project			Construction
		Management			Claims			Total
	Balance, December 31, 2012	$	57,231		$	26,776		$	84,007
	Additions	430			1,284			1,714
	Translation adjustments	(1,915		)	(694		)	(2,609		)
	Balance, September 30, 2013	$	55,747		$	27,366		$	83,112

Accounts_Payable_and_Accrued_E1

Accounts Payable and Accrued Expenses (Tables)	9 Months Ended
	Sep. 30, 2013
Accounts Payable and Accrued Expenses	'
Components of accounts payable and accrued expenses	'
	Below are the components of accounts payable and accrued expenses (in thousands):
		September 30, 2013		December 31, 2012
	Accounts payable	$	29,700	$	24,486
	Accrued payroll	35,484		33,750
	Accrued subcontractor fees	6,760		8,253
	Accrued agency fees	16,684		16,239
	Accrued legal and professional fees	1,252		3,303
	Other accrued expenses	4,617		4,275
		$	94,497	$	90,306

Notes_Payable_and_LongTerm_Deb1

Notes Payable and Long-Term Debt (Tables)	9 Months Ended
	Sep. 30, 2013
Notes Payable and Long-Term Debt	'
Summary of outstanding debt obligations	'
	Outstanding debt obligations are as follows (in thousands):
		September 30, 2013			December 31, 2012
	Term Loan (for more information, see below)	$	82,395		$	76,520
	Revolving Credit loan payable under the Credit Agreement. The weighted average interest rate of all borrowings was 6.79% and 7.78% at September 30, 2013 and December 31, 2012 (for more information, see below)	37,900			22,300
	Borrowings under revolving credit facilities with a consortium of banks in Spain (for more information, see below)	7,472			5,021
	Payment due for the Engineering S.A. acquisition	—			5,327
	Borrowings under unsecured credit facility with Caja Badajoz (for more information, see below)	2,024			—
	Borrowings under revolving credit facility with the National Bank of Abu Dhabi (for more information, see below)	2,332			—
	Other debt obligations	107			267
		132,230			109,435
	Less current maturities	20,583			21,769
	Notes payable and long-term debt, net of current maturities	$	111,647		$	87,666
Schedule of requirements for the consolidated leverage ratio, consolidated fixed charge ratio and the senior leverage ratio	'
	The following table sets forth those requirements for the period ended September 30, 2013:
	Consolidated Leverage Ratio	Consolidated Fixed Charge Ratio		Senior Leverage Ratio
	Not to exceed 6.00 to 1.00	Not less 1.00 to 1.00		Not to exceed 2.25 to 1.00
Schedule of the Company's actual ratios	'
	The following table presents the Company’s actual ratios at September 30, 2013:
	Consolidated Leverage Ratio	Consolidated Fixed Charge Ratio		Senior Leverage Ratio
	4.54 to 1.00	1.31 to 1.00		1.83 to 1.00

Supplemental_Cash_Flow_Informa1

Supplemental Cash Flow Information (Tables)	9 Months Ended
	Sep. 30, 2013
Supplemental Cash Flow Information	'
Summary of additional cash flow information	'
	The following table provides additional cash flow information (in thousands):
		Nine months ended September 30,
		2013		2012
	Interest and related financing fees paid	$	10,346	$	8,670
	Income taxes paid	$	6,901	$	3,947
	Reduction of minority interest in connection with acquisition of remaining noncontrolling interest in Gerens Hill	$	1,094	$	—
	Increase in intangible assets and goodwill in connection with acquisition of BCA and remaining noncontrolling interest in Gerens Hill	$	3,026	$	—
	Common stock issued for acquisition of BCA	$	2,000	$	—

Stockholders_Equity_Tables

Stockholders' Equity (Tables)	9 Months Ended
	Sep. 30, 2013
Stockholders' Equity	'
Summary of changes in stockholders' equity	'
	The following table summarizes the changes in stockholders’ equity during the nine months ended September 30, 2013 (in thousands):
					Hill International,			Noncontrolling
		Total			Inc. stockholders			interests
	Stockholders’ equity, December 31, 2012	$	141,103		$	127,546		$	13,557
	Net earnings	4,251			2,895			1,356
	Other comprehensive loss	(6,113		)	(4,306		)	(1,807		)
	Comprehensive loss	(1,862		)	(1,411		)	(451		)
	Additional paid in capital	4,349			4,349			—
	Purchase of noncontrolling interest	(1,094		)	—			(1,094		)
	Stockholders’ equity, September 30, 2013	$	142,496		$	130,484		$	12,012

Business_Segment_Information_T

Business Segment Information (Tables)	9 Months Ended
	Sep. 30, 2013
Business Segment Information	'
Consulting Fee Revenue and Total Revenue	'
	The following tables provide selected financial data for the Company’s reportable segments (dollars in thousands):
	Consulting Fee Revenue (“CFR”)
		Three Months Ended September 30,
		2013					2012
	Project Management	$	99,583		76.5	%	$	77,194	74.5	%
	Construction Claims	30,598			23.5		26,371		25.5
	Total	$	130,181		100	%	$	103,565	100	%
	Total Revenue:
		Three Months Ended September 30,
		2013					2012
	Project Management	$	115,533		78.5	%	$	92,752	77.4	%
	Construction Claims	31,661			21.5		27,135		22.6
	Total	$	147,194		100	%	$	119,887	100	%
	Consulting Fee Revenue (“CFR”)
		Nine Months Ended September 30,
		2013					2012
	Project Management	$	293,560		77	%	$	227,510	74.1	%
	Construction Claims	87,604			23		79,321		25.9
	Total	$	381,164		100	%	$	306,831	100	%
	Total Revenue
		Nine Months Ended September 30,
		2013					2012
	Project Management	$	340,700		78.9	%	$	273,670	77.1	%
	Construction Claims	91,031			21.1		81,458		22.9
	Total	$	431,731		100	%	$	355,128	100	%
Operating Profit	'
	Operating Profit:
		Three Months Ended September 30,
		2013			2012
	Project Management	$	11,290		$	8,012
	Construction Claims	3,806			2,641
	Corporate	(6,844		)	(5,563		)
	Total	$	8,252		$	5,090
		Nine Months Ended September 30,
		2013			2012
	Project Management	$	36,980		$	18,646
	Construction Claims	9,629			6,345
	Corporate	(21,118		)	(19,441		)
	Total	$	25,491		$	5,550
Depreciation and Amortization Expense	'
	Depreciation and Amortization Expense:
		Three Months Ended September 30,
		2013			2012
	Project Management	$	1,930		$	2,173
	Construction Claims	741			688
	Subtotal segments	2,671			2,861
	Corporate	54			62
	Total	$	2,725		$	2,923
		Nine Months Ended September 30,
		2013			2012
	Project Management	$	5,666		$	6,744
	Construction Claims	2,082			2,303
	Subtotal segments	7,748			9,047
	Corporate	173			198
	Total	$	7,921		$	9,245
Consulting Fee Revenue by Geographic Region	'
	Consulting Fee Revenue by Geographic Region:
		Three Months Ended September 30,
		2013					2012
	U.S./Canada	$	31,197		24	%	$	29,747	28.7	%
	Latin America	11,329			8.7		11,302		10.9
	Europe	18,211			14		20,710		20
	Middle East	56,588			43.5		34,119		32.9
	Africa	6,735			5.2		3,755		3.7
	Asia/Pacific	6,121			4.6		3,932		3.8
	Total	$	130,181		100	%	$	103,565	100	%
	U.S.	$	30,334		23.3	%	$	29,091	28.1	%
	Non-U.S.	99,847			76.7		74,474		71.9
	Total	$	130,181		100	%	$	103,565	100	%
	Total Revenue by Geographic Region:
		Three Months Ended September 30,
		2013					2012
	U.S./Canada	$	44,204		30	%	$	42,687	35.6	%
	Latin America	11,429			7.8		11,341		9.5
	Europe	19,556			13.3		22,146		18.5
	Middle East	57,804			39.3		35,487		29.6
	Africa	7,637			5.2		4,252		3.5
	Asia/Pacific	6,564			4.4		3,974		3.3
	Total	$	147,194		100	%	$	119,887	100	%
	U.S.	$	43,327		29.4	%	$	42,003	35	%
	Non-U.S.	103,867			70.6		77,884		65
	Total	$	147,194		100	%	$	119,887	100	%
	Consulting Fee Revenue by Geographic Region:
		Nine Months Ended September 30,
		2013					2012
	U.S./Canada	$	92,472		24.3	%	$	88,811	28.9	%
	Latin America	36,385			9.5		37,510		12.2
	Europe	57,888			15.2		63,670		20.8
	Middle East	161,065			42.3		95,475		31.1
	Africa	16,165			4.2		9,827		3.2
	Asia/Pacific	17,189			4.5		11,538		3.8
	Total	$	381,164		100	%	$	306,831	100	%
	U.S.	$	89,792		23.6	%	$	86,528	28.2	%
	Non-U.S.	291,372			76.4		220,303		71.8
	Total	$	381,164		100	%	$	306,831	100	%
	Total Revenue by Geographic Region:
		Nine Months Ended September 30,
		2013					2012
	U.S./Canada	$	131,430		30.4	%	$	127,495	35.9	%
	Latin America	36,677			8.5		37,696		10.6
	Europe	61,471			14.2		68,470		19.3
	Middle East	165,492			38.3		98,764		27.8
	Africa	18,733			4.3		11,113		3.1
	Asia/Pacific	17,928			4.3		11,590		3.3
	Total	$	431,731		100	%	$	355,128	100	%
	U.S.	$	128,652		29.8	%	$	125,134	35.2	%
	Non-U.S.	303,079			70.2		229,994		64.8
	Total	$	431,731		100	%	$	355,128	100	%
Consulting Fee Revenue By Client Type	'
	Consulting Fee Revenue By Client Type:
		Three Months Ended September 30,
		2013					2012
	U.S. federal government	$	3,722		2.9	%	$	3,234	3.1	%
	U.S. state, regional and local governments	18,539			14.2		16,867		16.3
	Foreign governments	47,516			36.5		24,843		24
	Private sector	60,404			46.4		58,621		56.6
	Total	$	130,181		100	%	$	103,565	100	%
	Total Revenue By Client Type:
		Three Months Ended September 30,
		2013					2012
	U.S. federal government	$	4,253		2.9	%	$	3,615	3	%
	U.S. state, regional and local governments	24,901			16.9		23,535		19.6
	Foreign governments	49,501			33.6		26,644		22.2
	Private sector	68,539			46.6		66,093		55.2
	Total	$	147,194		100	%	$	119,887	100	%
	Consulting Fee Revenue By Client Type:
		Nine Months Ended September 30,
		2013					2012
	U.S. federal government	$	11,613		3	%	$	9,414	3.1	%
	U.S. state, regional and local governments	53,360			14		46,809		15.3
	Foreign governments	129,608			34		68,519		22.3
	Private sector	186,583			49		182,089		59.3
	Total	$	381,164		100	%	$	306,831	100	%
	Total Revenue By Client Type:
		Nine Months Ended September 30,
		2013					2012
	U.S. federal government	$	13,436		3.1	%	$	11,332	3.2	%
	U.S. state, regional and local governments	76,822			17.8		66,194		18.6
	Foreign governments	135,426			31.4		73,395		20.7
	Private sector	206,047			47.7		204,207		57.5
	Total	$	431,731		100	%	$	355,128	100	%
Property, Plant and Equipment, Net by Geographic Location	'
	Property, Plant and Equipment, Net by Geographic Location:
		September 30, 2013			December 31, 2012
	U.S./Canada	$	4,174		$	4,700
	Latin America	1,320			1,278
	Europe	1,928			2,334
	Middle East	2,525			2,344
	Africa	187			191
	Asia/Pacific	551			421
	Total	$	10,685		$	11,268
	U.S.	$	4,174		$	4,697
	Non-U.S.	6,511			6,571
	Total	$	10,685		$	11,268

The_Company_Details

The Company (Details)	9 Months Ended
	Sep. 30, 2013
	item
The Company	'
Number of key operating divisions	2

Acquisitions_Details

Acquisitions (Details)

9 Months Ended

1 Months Ended

0 Months Ended

0 Months Ended

Sep. 30, 2013

30-May-13

Apr. 30, 2013

Apr. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Jul. 31, 2013

30-May-13

30-May-13

Sep. 30, 2013

30-May-13

30-May-13

30-May-13

30-May-13

30-May-13

30-May-13

USD ($)

BCA

Gerens Hill

Gerens Hill

Gerens Hill

Gerens Hill

Hill International N.V.

Hill International N.V.

Hill International N.V.

Hill International N.V.

Hill International N.V.

Hill International N.V.

Hill International N.V.

Hill International N.V.

Hill International N.V.

Hill International N.V.

item

USD ($)

EUR (€)

USD ($)

EUR (€)

BCA

BCA

BCA

BCA

BCA

BCA

BCA

BCA

BCA

BCA

USD ($)

ZAR

USD ($)

Client relationship

Client relationship

Contract

Contract

Trade name

Trade name

USD ($)

ZAR

USD ($)

ZAR

USD ($)

ZAR

Acquisitions

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Number of professionals

'

34

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Purchase price payable in shares

$2,000,000

'

'

'

'

'

'

$2,000,000

'

'

'

'

'

'

'

'

Payment of purchase price on closing date

'

'

'

'

'

'

'

1,072,400

'

'

'

'

'

'

'

'

Purchase price payable on second tranche

'

'

'

'

'

'

'

927,600

'

'

'

'

'

'

'

'

Shares issued in satisfaction of purchase price installment

'

'

'

'

'

'

331,444

379,655

379,655

'

'

'

'

'

'

'

Estimated Third Tranche Payment

'

'

'

'

'

'

'

'

'

902,000

'

'

'

'

'

'

Intangible assets acquired

'

'

'

'

'

'

'

1,312,000

13,143,000

'

1,053,000

10,546,000

186,000

1,863,000

73,000

734,000

Goodwill

'

'

'

'

'

'

'

1,284,000

12,872,500

'

'

'

'

'

'

'

Weighted average life of acquired intangible assets

'

'

'

'

'

'

'

'8 years 2 months 12 days

'8 years 2 months 12 days

'

'10 years

'10 years

'8 months

'8 months

'2 years

'2 years

Period preceding the seventh trading day prior to closing date of the transaction over which average closing price per share of the company's stock is used

'

'

'

'

'

'

'

'30 days

'30 days

'

'

'

'

'

'

'

Period over which average closing price of our common stock used to compute share issuable on second tranche payment

'

'

'

'

'

'

'

'30 days

'30 days

'

'

'

'

'

'

'

Period over which average closing price of our common stock used to compute share issuable on third tranche payment

'

'

'

'

'

'

'

'30 days

'30 days

'

'

'

'

'

'

'

Period over which average net profit before taxes used to compute third tranche payment

'

'

'

'

'

'

'

'2 years

'2 years

'

'

'

'

'

'

'

Third tranche payment on basis of excess of average net profit before taxes over net profit before taxes, multiplier

'

'

'

'

'

'

'

2.205

2.205

'

'

'

'

'

'

'

Minority shareholders ownership percentage

'

'

6.80%

6.80%

'

'

'

'

'

'

'

'

'

'

'

'

Value of shares purchased on exercise of put options

'

'

'

'

2,526,000

1,915,000

'

'

'

'

'

'

'

'

'

'

Noncontrolling interest reduced on exercising put options

1,094,000

'

1,094,000

829,000

'

'

'

'

'

'

'

'

'

'

'

'

Increase in goodwill

'

'

430,000

326,000

'

'

'

'

'

'

'

'

'

'

'

'

Increase in deferred tax liabilities

'

'

430,000

326,000

'

'

'

'

'

'

'

'

'

'

'

'

Increase in intangible assets

'

'

$1,432,000

€ 1,086,000

'

'

'

'

'

'

'

'

'

'

'

'

Accounts_Receivable_Details

Accounts Receivable (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Components of accounts receivable	'	'
Billed	$205,238	$181,075
Retainage, current portion	7,282	5,022
Unbilled	32,774	35,347
Accounts receivable, gross	245,294	221,444
Allowance for doubtful accounts	-9,280	-10,268
Total	$236,014	$211,176

Accounts_Receivable_Details_2

Accounts Receivable (Details 2)	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2013	Sep. 30, 2013
	USD ($)	USD ($)	Libya	Libya
			USD ($)	LYD
Accounts Receivable	'	'	'	'
Reduction in accounts receivable	'	'	$3,100,000	'
Cash proceeds from collection of accounts receivable	'	'	2,400,000	3,000,000
Cash proceeds from collection of accounts receivable made to Libyan tax authorities on behalf of the entity	'	'	700,000	800,000
Accounts receivable outstanding	$236,014,000	$211,176,000	$57,000,000	'

Intangible_Assets_Details

Intangible Assets (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Summary of acquired intangible assets	'	'
Gross Carrying Amount	$51,213	$49,997
Accumulated Amortization	26,072	21,749
Intangible assets, net	25,141	28,248
Client relationships	'	'
Summary of acquired intangible assets	'	'
Gross Carrying Amount	37,019	36,506
Accumulated Amortization	17,033	14,175
Acquired contract rights	'	'
Summary of acquired intangible assets	'	'
Gross Carrying Amount	10,946	10,449
Accumulated Amortization	8,216	6,931
Trade names	'	'
Summary of acquired intangible assets	'	'
Gross Carrying Amount	3,248	3,042
Accumulated Amortization	$823	$643

Intangible_Assets_Details_2

Intangible Assets (Details 2) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Intangible Assets	'	'	'	'
Amortization expense related to intangible assets	$1,723	$1,835	$4,957	$5,947
Estimated amortization expense of intangible assets for the next five years	'	'	'	'
2013 (remaining 3 months)	1,613	'	1,613	'
2014	5,526	'	5,526	'
2015	5,139	'	5,139	'
2016	3,926	'	3,926	'
2017	$3,044	'	$3,044	'

Goodwill_Details

Goodwill (Details) (USD $)	9 Months Ended
	Sep. 30, 2013
Summary of changes in carrying value of goodwill during 2013	'
Balance at the beginning of the period	$84,007,000
Additions	1,714,000
Translation adjustments	-2,609,000
Balance at the end of the period	83,112,000
Project Management	'
Goodwill	'
Goodwill impairment	0
Fair value of assets exceeding the carrying value based on a preliminary valuation	55,966,000
Summary of changes in carrying value of goodwill during 2013	'
Balance at the beginning of the period	57,231,000
Additions	430,000
Translation adjustments	-1,915,000
Balance at the end of the period	55,747,000
Construction Claims	'
Goodwill	'
Goodwill impairment	0
Fair value of assets exceeding the carrying value based on a preliminary valuation	7,905,000
Summary of changes in carrying value of goodwill during 2013	'
Balance at the beginning of the period	26,776,000
Additions	1,284,000
Translation adjustments	-694,000
Balance at the end of the period	$27,366,000

Accounts_Payable_and_Accrued_E2

Accounts Payable and Accrued Expenses (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Components of accounts payable and accrued expenses	'	'
Accounts payable	$29,700	$24,486
Accrued payroll	35,484	33,750
Accrued subcontractor fees	6,760	8,253
Accrued agency fees	16,684	16,239
Accrued legal and professional fees	1,252	3,303
Other accrued expenses	4,617	4,275
Accounts payable and accrued expenses, net	$94,497	$90,306

Notes_Payable_and_LongTerm_Deb2

Notes Payable and Long-Term Debt (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012
Summary of outstanding debt obligations	'	'
Total debt	$132,230,000	$109,435,000
Less current maturities	20,583,000	21,769,000
Notes payable and long-term debt, net of current maturities	111,647,000	87,666,000
Revolving credit facility | Bank of America	'	'
Summary of outstanding debt obligations	'	'
Total debt	37,900,000	22,300,000
Weighted average interest rate of borrowings (as a percent)	6.79%	7.78%
Revolving credit facility | Consortium of banks in Spain	'	'
Summary of outstanding debt obligations	'	'
Total debt	7,472,000	5,021,000
Revolving credit facility | Caja Badajoz bank in Spain	'	'
Summary of outstanding debt obligations	'	'
Total debt	2,024,000	'
Revolving credit facility | National Bank of Abu Dhabi	'	'
Summary of outstanding debt obligations	'	'
Total debt	2,332,000	'
Term Loan	'	'
Summary of outstanding debt obligations	'	'
Total debt	82,395,000	76,520,000
Payment due for the Engineering S. A. acquisition	'	'
Summary of outstanding debt obligations	'	'
Total debt	'	5,327,000
Other debt obligations	'	'
Summary of outstanding debt obligations	'	'
Total debt	$107,000	$267,000

Notes_Payable_and_LongTerm_Deb3

Notes Payable and Long-Term Debt (Details 2) (USD $)	0 Months Ended	9 Months Ended				0 Months Ended	9 Months Ended	0 Months Ended
	23-May-13	Sep. 30, 2013	23-May-13	23-May-13	23-May-13	Oct. 18, 2012	Sep. 30, 2013	Oct. 18, 2012	Oct. 18, 2012
	Revolving credit facility	Revolving credit facility	Revolving credit facility	Letters of credit	Letters of credit	Term loan payable	Term loan payable	Term loan payable	Term loan payable
			Maximum		Qatar National Bank			Minimum	Maximum
Description of terms of credit agreement	'	'	'	'	'	'	'	'	'
Collateral pledged, percentage of outstanding capital of Hill International N.V. and certain other foreign subsidiaries	'	'	'	'	'	65.00%	'	'	'
Interest rate (as a percent)	'	'	'	'	'	'	7.50%	'	'
Increased interest rate if fixed price contracts exceeded specified percentages	'	'	'	'	'	'	9.50%	'	'
Term loan target internal rate of return (as a percent)	'	'	'	'	'	20.00%	'	'	'
Exit Fee Amount	'	'	'	'	'	'	'	$0	$11,790,000
Interest expense and related financing fees	'	'	'	'	'	25,000,000	'	'	'
Maximum borrowing capacity	'	'	'	'	17,000,000	'	'	'	'
Limit on LCs available to the entity's foreign subsidiaries who are not loan parties, before amendment	'	'	'	4,000,000	'	'	'	'	'
Limit on LCs available to the entity's foreign subsidiaries who are not loan parties	'	'	'	11,800,000	'	'	'	'	'
Cash collateral permitted for letters of credit and performance bonds	'	'	20,000,000	'	'	'	'	'	'
Amendment fee	150,000	'	'	'	'	'	'	'	'
Out-of-pocket costs	372,000	'	'	'	'	'	'	'	'
Consolidated leverage ratio not to exceed	'	6	'	'	'	'	'	'	'
Consolidated fixed charge ratio not less than	'	1	'	'	'	'	'	'	'
Actual consolidated leverage ratio	'	4.54	'	'	'	'	'	'	'
Actual consolidated fixed charge ratio	'	1.31	'	'	'	'	'	'	'
Senior leverage ratio not to exceed	'	2.25	'	'	'	'	'	'	'
Actual senior leverage ratio	'	1.83	'	'	'	'	'	'	'
Letters of credit outstanding	'	17,484,000	'	'	'	'	'	'	'
Total remaining availability	'	$9,616,000	'	'	'	'	'	'	'

Notes_Payable_and_LongTerm_Deb4

Notes Payable and Long-Term Debt (Details 3)	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2013	Sep. 30, 2013	Dec. 31, 2012	Dec. 31, 2012
	USD ($)	USD ($)	Revolving credit facility	Revolving credit facility	Gerens Hill	Gerens Hill	Gerens Hill	Gerens Hill
			Consortium of banks in Spain	Consortium of banks in Spain	Revolving credit facility	Revolving credit facility	Revolving credit facility	Revolving credit facility
			USD ($)	USD ($)	Consortium of banks in Spain	Consortium of banks in Spain	Consortium of banks in Spain	Consortium of banks in Spain
					USD ($)	EUR (€)	USD ($)	EUR (€)
					item	item
Description of terms of credit agreement	'	'	'	'	'	'	'	'
Number of banks involved in revolving credit facility	'	'	'	'	12	12	'	'
Interest rate (as a percent)	'	'	'	'	6.50%	6.50%	'	'
Borrowing capacity	'	'	'	'	$7,611,000	€ 5,640,000	$7,460,000	'
Borrowings outstanding	$132,230,000	$109,435,000	$7,472,000	$5,021,000	$7,472,000	€ 5,537,000	$5,021,000	€ 3,796,000

Notes_Payable_and_LongTerm_Deb5

Notes Payable and Long-Term Debt (Details 4)

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Dec. 31, 2012

Dec. 31, 2012

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Jul. 23, 2013

Jul. 23, 2013

Feb. 28, 2011

Feb. 28, 2011

Apr. 30, 2012

Apr. 30, 2012

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Sep. 30, 2013

Dec. 31, 2012

Dec. 31, 2012

Sep. 30, 2013

Sep. 30, 2013

Foreign credit agreements

Revolving credit facility

Revolving credit facility

Revolving credit facility

Revolving credit facility

Revolving credit facility

Revolving credit facility

Revolving credit facility

Revolving credit facility

Revolving credit facility

Revolving credit facility

Revolving credit facility

Revolving credit facility

Revolving credit facility

Revolving credit facility

Letters of credit

Letters of credit

Letters of credit

Letters of credit

Payments due for the Engineering S. A. acquisition

Payments due for the Engineering S. A. acquisition

Payments due for the Engineering S. A. acquisition

Payments due for the Engineering S. A. acquisition

Payments due for the Engineering S. A. acquisition

Payments due for the Engineering S. A. acquisition

Engineering S.A.

Engineering S.A.

Engineering S.A.

Engineering S.A.

Engineering S.A.

Engineering S.A.

Engineering S.A.

Engineering S.A.

Gerens Hill

Gerens Hill

Gerens Hill

Gerens Hill

Gerens Hill

Gerens Hill

USD ($)

USD ($)

National Bank of Abu Dhabi

National Bank of Abu Dhabi

National Bank of Abu Dhabi

National Bank of Abu Dhabi

National Bank of Abu Dhabi

Egnatia Bank

Egnatia Bank

Egnatia Bank

Egnatia Bank

Barclays Bank PLC

Barclays Bank PLC

Barclays Bank PLC

Barclays Bank PLC

National Bank of Abu Dhabi

National Bank of Abu Dhabi

Egnatia Bank

Egnatia Bank

USD ($)

BRL

USD ($)

BRL

USD ($)

BRL

Revolving credit facility

Revolving credit facility

Revolving credit facility

Revolving credit facility

Revolving credit facility

Revolving credit facility

Revolving credit facility

Revolving credit facility

Revolving credit facility

Revolving credit facility

Revolving credit facility

Revolving credit facility

Revolving credit facility

Revolving credit facility

USD ($)

AED

USD ($)

AED

Minimum

USD ($)

EUR (€)

USD ($)

Prime rate

USD ($)

GBP (£)

USD ($)

Bank of England rate

USD ($)

AED

USD ($)

EUR (€)

USD ($)

BRL

Brazil Bank Revolving Credit Facility 1

Brazil Bank Revolving Credit Facility 1

Brazil Bank Revolving Credit Facility 2

Brazil Bank Revolving Credit Facility 2

Brazil Bank Revolving Credit Facility 3

Brazil Bank Revolving Credit Facility 3

Caja Badajoz bank in Spain

Caja Badajoz bank in Spain

Caja Badajoz bank in Spain

Caja Badajoz bank in Spain

Caja Badajoz bank in Spain

Caja Badajoz bank in Spain

item

item

item

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

EUR (€)

USD ($)

EUR (€)

Minimum

EURIBOR

Description of terms of credit agreement

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Maximum borrowing capacity

'

'

$3,131,000

11,500,000

$3,131,000

11,500,000

'

$1,351,000

€ 1,000,000

'

'

$889,000

£ 550,000

'

'

$40,844,000

150,000,000

$6,080,000

€ 4,500,000

'

'

'

'

'

'

$1,288,000

2,900,000

'

'

'

'

'

'

$2,024,000

€ 1,500,000

$1,984,000

€ 1,500,000

'

'

Letters of credit outstanding

'

17,484,000

'

'

'

'

'

'

'

'

'

'

'

'

'

31,583,000

115,987,000

2,357,000

1,745,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Reference rate

'

'

'one-month Emirates InterBank Offer Rate

'one-month Emirates InterBank Offer Rate

'

'

'

'

'

'

'prime rate

'

'

'

'Bank of England rate

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'three-month EURIBOR rate

Basis of effective interest rate (as a percent)

'

'

3.00%

3.00%

'

'

'

'

'

'

1.23%

'

'

'

2.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

3.00%

Interest rate (as a percent)

'

'

'

'

'

'

'

'

'

'

5.00%

'

'

'

0.50%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0.54%

Effective interest rate (as a percent)

'

'

4.25%

4.25%

4.30%

4.30%

5.50%

'

'

'

6.23%

'

'

'

2.50%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

5.00%

3.54%

Amounts outstanding

'

'

2,332,000

8,564,000

0

'

'

0

'

0

'

0

'

0

'

'

'

'

'

'

'

'

'

'

'

'

'

0

0

0

0

0

0

2,024,000

1,500,000

0

'

'

'

Number of revolving credit lines maintained by Engineering S.A.

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

3

3

'

'

'

'

'

'

'

'

'

'

'

'

Number of banks involved in revolving credit facility

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

2

2

'

'

'

'

'

'

'

'

'

'

'

'

weighted average monthly interest rate (as a percent)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

2.64%

2.64%

'

'

'

'

'

'

'

'

'

'

'

'

Several of UK account receivable less than 90 days old and excluding any receivables which are due from any associate used for determining debt owed

'

'

'

'

'

'

'

'

'

'

'

3

3

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Period of account receivable due used to determine debt owed under debt covenant

'

'

'

'

'

'

'

'

'

'

'

'90 days

'90 days

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Available borrowing capacity

4,466,000

9,616,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Indebtedness to sellers

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

10,376,000

17,200,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Weighted average indebtedness discount rate (as a percent)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

4.72%

4.72%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Installment payment

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$5,095,000

11,372,000

'

'

$3,508,000

6,624,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Supplemental_Cash_Flow_Informa2

Supplemental Cash Flow Information (Details) (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012
Summary of additional cash flow information	'	'
Interest and related financing fees paid	$10,346	$8,670
Income taxes paid	6,901	3,947
Reduction of minority interest in connection with acquisition of remaining noncontrolling interest in Gerens Hill	1,094	'
Increase in intangible assets and goodwill in connection with acquisition of BCA and remaining noncontrolling interest in Gerens Hill	3,026	'
Common stock issued for acquisition of BCA	$2,000	'

Earnings_Loss_per_Share_Detail

Earnings (Loss) per Share (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Earnings (Loss) per Share	'	'	'	'
Dilutive stock options (in shares)	143,528	'	185,809	'
Total number of shares excluded from diluted loss per common share	5,492,975	339,850	5,366,904	3,421,201

ShareBased_Compensation_Detail

Share-Based Compensation (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Share-Based Compensation	'	'	'	'
Options outstanding (in shares)	6,650,156	'	6,650,156	'
Weighted average exercise price of outstanding options (in dollars per share)	$4.73	'	$4.73	'
Aggregate fair value of options granted (in dollars)	'	'	$4,039,000	'
Share-based compensation expense recognized (in dollars)	674,000	493,000	2,257,000	1,931,000
Weighted average assumptions used to estimate the fair value of options granted	'	'	'	'
Expected life	'	'	'4 years 3 months 14 days	'
Volatility (as a percent)	'	'	71.70%	'
Risk-free interest rate (as a percent)	'	'	0.77%	'
Options exercised (in shares)	'	'	8,000	'
Weighted average exercise price of options exercised (in dollars per share)	'	'	$2.45	'
Options forfeited (in shares)	'	'	11,000	'
Weighted average exercise price of options forfeited (in dollars per share)	'	'	$4.97	'
Options lapsed (in shares)	'	'	51,500	'
Weighted average exercise price of options lapsed (in dollars per share)	'	'	$12.03	'
2009 Non-Employee Director Stock Grant Plan	'	'	'	'
Share-Based Compensation	'	'	'	'
Common stock issued (in shares)	'	'	51,905	'
Share-based compensation expense recognized (in dollars)	'	'	150,000	'
2008 Employee Stock Purchase Plan	'	'	'	'
Share-Based Compensation	'	'	'	'
Shares purchased	'	'	23,823	'
Aggregate purchase price	'	'	$53,000	'
Options vesting over a four-year period	'	'	'	'
Share-Based Compensation	'	'	'	'
Options granted (in shares)	'	'	1,000,000	'
Award vesting period	'	'	'4 years	'
Weighted average exercise price of options granted (in dollars per share)	'	'	$4.04	'
Weighted-average contractual life of options granted	'	'	'5 years	'
Options vesting over a five-year period	'	'	'	'
Share-Based Compensation	'	'	'	'
Options granted (in shares)	'	'	960,000	'
Award vesting period	'	'	'5 years	'
Weighted average exercise price of options granted (in dollars per share)	'	'	$3.66	'
Weighted-average contractual life of options granted	'	'	'7 years	'
Options vested immediately	'	'	'	'
Share-Based Compensation	'	'	'	'
Options granted (in shares)	'	'	116,280	'
Weighted average exercise price of options granted (in dollars per share)	'	'	$2.89	'
Weighted-average contractual life of options granted	'	'	'5 years	'

Stockholders_Equity_Details

Stockholders' Equity (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Stock Repurchase Program	'	'	'	'
Stock Repurchase Program, authorized amount	'	'	$60,000,000	'
Number of shares purchased by company under stock repurchase program	5,834,369	'	5,834,369	'
Aggregate purchase price of shares repurchased	'	'	24,438,000	'
Average purchase price per share (in dollars per share)	'	'	$4.19	'
Aggregate amount of stock purchase authorized under the terms of the Credit Agreement	'	'	2,000,000	'
Aggregate amount of unrestricted cash and cash equivalents plus availability under the Credit Agreement	30,000,000	'	30,000,000	'
Increase (decrease) in stockholders' equity	'	'	'	'
Total Stockholders' equity at the beginning of the period	'	'	141,103,000	'
Net earnings	2,942,000	1,442,000	4,251,000	-4,577,000
Other comprehensive loss	'	'	-6,113,000	'
Comprehensive loss	'	'	-1,862,000	'
Additional paid in capital	'	'	4,349,000	'
Purchase of noncontrolling interest	'	'	-1,094,000	'
Total Stockholders' equity at the end of the period	142,496,000	'	142,496,000	'
Hill International, Inc. stockholders - Stockholders' equity at the beginning of the period	'	'	127,546,000	'
Net earnings	2,556,000	1,304,000	2,895,000	-5,756,000
Other comprehensive loss	'	'	-4,306,000	'
Comprehensive loss	'	'	-1,411,000	'
Hill International, Inc. stockholders - Stockholders' equity at the end of the period	130,484,000	'	130,484,000	'
Noncontroling interests - Stockholders' equity at the beginning of the period	'	'	13,557,000	'
Net earnings	386,000	138,000	1,356,000	1,179,000
Other comprehensive loss	'	'	-1,807,000	'
Comprehensive loss	-139,000	-69,000	-451,000	-44,000
Noncontroling interests - Stockholders' equity at the end of the period	$12,012,000	'	$12,012,000	'

Income_Taxes_Details

Income Taxes (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Income Taxes	'	'	'	'	'
Reserve for uncertain tax positions	$2,560,000	'	$2,560,000	'	$5,033,000
Reduction in reserve for uncertain tax position based on settlement of prior year tax positions related to a foreign jurisdiction	2,473,000	'	2,473,000	'	'
Potential interest and penalties related to uncertain tax positions	100,000	'	100,000	'	'
Effective income tax rate (as a percent)	-6.50%	-333.00%	48.40%	36.40%	'
Income tax (benefit) expense resulting from adjustments to prior year's book amounts to the actual amounts per the tax returns	($105,000)	($195,000)	$40,000	($195,000)	'

Business_Segment_Information_D

Business Segment Information (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Revenue	'	'	'	'
Consulting Fee Revenue	$130,181,000	$103,565,000	$381,164,000	$306,831,000
Consulting Fee Revenue, percentage	100.00%	100.00%	100.00%	100.00%
Total Revenue	147,194,000	119,887,000	431,731,000	355,128,000
Total Revenue, percentage	100.00%	100.00%	100.00%	100.00%
Project Management	'	'	'	'
Revenue	'	'	'	'
Consulting Fee Revenue	99,583,000	77,194,000	293,560,000	227,510,000
Consulting Fee Revenue, percentage	76.50%	74.50%	77.00%	74.10%
Total Revenue	115,533,000	92,752,000	340,700,000	273,670,000
Total Revenue, percentage	78.50%	77.40%	78.90%	77.10%
Construction Claims	'	'	'	'
Revenue	'	'	'	'
Consulting Fee Revenue	30,598,000	26,371,000	87,604,000	79,321,000
Consulting Fee Revenue, percentage	23.50%	25.50%	23.00%	25.90%
Total Revenue	$31,661,000	$27,135,000	$91,031,000	$81,458,000
Total Revenue, percentage	21.50%	22.60%	21.10%	22.90%

Business_Segment_Information_D1

Business Segment Information (Details 2) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Operating Profit (Loss)	'	'	'	'
Operating profit	$8,252	$5,090	$25,491	$5,550
Project Management	'	'	'	'
Operating Profit (Loss)	'	'	'	'
Operating profit	11,290	8,012	36,980	18,646
Construction Claims	'	'	'	'
Operating Profit (Loss)	'	'	'	'
Operating profit	3,806	2,641	9,629	6,345
Corporate	'	'	'	'
Operating Profit (Loss)	'	'	'	'
Operating profit	($6,844)	($5,563)	($21,118)	($19,441)

Business_Segment_Information_D2

Business Segment Information (Details 3) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Depreciation and Amortization Expense	'	'	'	'
Depreciation and amortization expenses	$2,725	$2,923	$7,921	$9,245
Project Management	'	'	'	'
Depreciation and Amortization Expense	'	'	'	'
Depreciation and amortization expenses	1,930	2,173	5,666	6,744
Construction Claims	'	'	'	'
Depreciation and Amortization Expense	'	'	'	'
Depreciation and amortization expenses	741	688	2,082	2,303
Aggregate of project and construction	'	'	'	'
Depreciation and Amortization Expense	'	'	'	'
Depreciation and amortization expenses	2,671	2,861	7,748	9,047
Corporate	'	'	'	'
Depreciation and Amortization Expense	'	'	'	'
Depreciation and amortization expenses	$54	$62	$173	$198

Business_Segment_Information_D3

Business Segment Information (Details 4) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Consulting Fee Revenue by Geographic Region	'	'	'	'
Consulting Fee Revenue	$130,181,000	$103,565,000	$381,164,000	$306,831,000
Consulting Fee Revenue, percentage	100.00%	100.00%	100.00%	100.00%
Total Revenue	147,194,000	119,887,000	431,731,000	355,128,000
Total Revenue, percentage	100.00%	100.00%	100.00%	100.00%
U.S./Canada	'	'	'	'
Consulting Fee Revenue by Geographic Region	'	'	'	'
Consulting Fee Revenue	31,197,000	29,747,000	92,472,000	88,811,000
Consulting Fee Revenue, percentage	24.00%	28.70%	24.30%	28.90%
Total Revenue	44,204,000	42,687,000	131,430,000	127,495,000
Total Revenue, percentage	30.00%	35.60%	30.40%	35.90%
Latin America	'	'	'	'
Consulting Fee Revenue by Geographic Region	'	'	'	'
Consulting Fee Revenue	11,329,000	11,302,000	36,385,000	37,510,000
Consulting Fee Revenue, percentage	8.70%	10.90%	9.50%	12.20%
Total Revenue	11,429,000	11,341,000	36,677,000	37,696,000
Total Revenue, percentage	7.80%	9.50%	8.50%	10.60%
Europe	'	'	'	'
Consulting Fee Revenue by Geographic Region	'	'	'	'
Consulting Fee Revenue	18,211,000	20,710,000	57,888,000	63,670,000
Consulting Fee Revenue, percentage	14.00%	20.00%	15.20%	20.80%
Total Revenue	19,556,000	22,146,000	61,471,000	68,470,000
Total Revenue, percentage	13.30%	18.50%	14.20%	19.30%
Middle East	'	'	'	'
Consulting Fee Revenue by Geographic Region	'	'	'	'
Consulting Fee Revenue	56,588,000	34,119,000	161,065,000	95,475,000
Consulting Fee Revenue, percentage	43.50%	32.90%	42.30%	31.10%
Total Revenue	57,804,000	35,487,000	165,492,000	98,764,000
Total Revenue, percentage	39.30%	29.60%	38.30%	27.80%
Africa	'	'	'	'
Consulting Fee Revenue by Geographic Region	'	'	'	'
Consulting Fee Revenue	6,735,000	3,755,000	16,165,000	9,827,000
Consulting Fee Revenue, percentage	5.20%	3.70%	4.20%	3.20%
Total Revenue	7,637,000	4,252,000	18,733,000	11,113,000
Total Revenue, percentage	5.20%	3.50%	4.30%	3.10%
Asia/Pacific	'	'	'	'
Consulting Fee Revenue by Geographic Region	'	'	'	'
Consulting Fee Revenue	6,121,000	3,932,000	17,189,000	11,538,000
Consulting Fee Revenue, percentage	4.60%	3.80%	4.50%	3.80%
Total Revenue	6,564,000	3,974,000	17,928,000	11,590,000
Total Revenue, percentage	4.40%	3.30%	4.30%	3.30%
U.S.	'	'	'	'
Consulting Fee Revenue by Geographic Region	'	'	'	'
Consulting Fee Revenue	30,334,000	29,091,000	89,792,000	86,528,000
Consulting Fee Revenue, percentage	23.30%	28.10%	23.60%	28.20%
Total Revenue	43,327,000	42,003,000	128,652,000	125,134,000
Total Revenue, percentage	29.40%	35.00%	29.80%	35.20%
Non - U.S.	'	'	'	'
Consulting Fee Revenue by Geographic Region	'	'	'	'
Consulting Fee Revenue	99,847,000	74,474,000	291,372,000	220,303,000
Consulting Fee Revenue, percentage	76.70%	71.90%	76.40%	71.80%
Total Revenue	103,867,000	77,884,000	303,079,000	229,994,000
Total Revenue, percentage	70.60%	65.00%	70.20%	64.80%
Non - U.S. | Consulting fee revenue | Geographic concentration risk	'	'	'	'
Consulting Fee Revenue by Geographic Region	'	'	'	'
Number of countries	0	0	0	0
Non - U.S. | Total revenue | Geographic concentration risk	'	'	'	'
Consulting Fee Revenue by Geographic Region	'	'	'	'
Number of countries	0	0	0	0
United Arab Emirates	'	'	'	'
Consulting Fee Revenue by Geographic Region	'	'	'	'
Consulting Fee Revenue	16,017,000	14,888,000	50,485,000	44,862,000
Consulting Fee Revenue, percentage	12.30%	14.40%	13.20%	14.60%
Total Revenue	16,182,000	15,281,000	51,540,000	45,939,000
Total Revenue, percentage	11.00%	12.70%	11.90%	12.90%
Brazil	'	'	'	'
Consulting Fee Revenue by Geographic Region	'	'	'	'
Consulting Fee Revenue	'	'	'	33,114,000
Consulting Fee Revenue, percentage	'	'	'	10.80%
Oman	'	'	'	'
Consulting Fee Revenue by Geographic Region	'	'	'	'
Consulting Fee Revenue	14,667,000	'	'	'
Consulting Fee Revenue, percentage	11.30%	'	'	'
Total Revenue	$14,697,000	'	'	'
Total Revenue, percentage	10.00%	'	'	'

Business_Segment_Information_D4

Business Segment Information (Details 5) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Consulting Fee Revenue and Total Revenue By Client Type	'	'	'	'
Consulting Fee Revenue	$130,181,000	$103,565,000	$381,164,000	$306,831,000
Consulting Fee Revenue, percentage	100.00%	100.00%	100.00%	100.00%
Total Revenue	147,194,000	119,887,000	431,731,000	355,128,000
Total Revenue, percentage	100.00%	100.00%	100.00%	100.00%
U.S. federal government	'	'	'	'
Consulting Fee Revenue and Total Revenue By Client Type	'	'	'	'
Consulting Fee Revenue	3,722,000	3,234,000	11,613,000	9,414,000
Consulting Fee Revenue, percentage	2.90%	3.10%	3.00%	3.10%
Total Revenue	4,253,000	3,615,000	13,436,000	11,332,000
Total Revenue, percentage	2.90%	3.00%	3.10%	3.20%
U.S. state, regional and local governments	'	'	'	'
Consulting Fee Revenue and Total Revenue By Client Type	'	'	'	'
Consulting Fee Revenue	18,539,000	16,867,000	53,360,000	46,809,000
Consulting Fee Revenue, percentage	14.20%	16.30%	14.00%	15.30%
Total Revenue	24,901,000	23,535,000	76,822,000	66,194,000
Total Revenue, percentage	16.90%	19.60%	17.80%	18.60%
Foreign governments	'	'	'	'
Consulting Fee Revenue and Total Revenue By Client Type	'	'	'	'
Consulting Fee Revenue	47,516,000	24,843,000	129,608,000	68,519,000
Consulting Fee Revenue, percentage	36.50%	24.00%	34.00%	22.30%
Total Revenue	49,501,000	26,644,000	135,426,000	73,395,000
Total Revenue, percentage	33.60%	22.20%	31.40%	20.70%
Private sector	'	'	'	'
Consulting Fee Revenue and Total Revenue By Client Type	'	'	'	'
Consulting Fee Revenue	60,404,000	58,621,000	186,583,000	182,089,000
Consulting Fee Revenue, percentage	46.40%	56.60%	49.00%	59.30%
Total Revenue	$68,539,000	$66,093,000	$206,047,000	$204,207,000
Total Revenue, percentage	46.60%	55.20%	47.70%	57.50%

Business_Segment_Information_D5

Business Segment Information (Details 6) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Property, Plant and Equipment, Net by Geographic Location	'	'
Property, Plant and Equipment, Net by Geographic Location	$10,685	$11,268
U.S./Canada	'	'
Property, Plant and Equipment, Net by Geographic Location	'	'
Property, Plant and Equipment, Net by Geographic Location	4,174	4,700
Latin America	'	'
Property, Plant and Equipment, Net by Geographic Location	'	'
Property, Plant and Equipment, Net by Geographic Location	1,320	1,278
Europe	'	'
Property, Plant and Equipment, Net by Geographic Location	'	'
Property, Plant and Equipment, Net by Geographic Location	1,928	2,334
Middle East	'	'
Property, Plant and Equipment, Net by Geographic Location	'	'
Property, Plant and Equipment, Net by Geographic Location	2,525	2,344
Africa	'	'
Property, Plant and Equipment, Net by Geographic Location	'	'
Property, Plant and Equipment, Net by Geographic Location	187	191
Asia/Pacific	'	'
Property, Plant and Equipment, Net by Geographic Location	'	'
Property, Plant and Equipment, Net by Geographic Location	551	421
U.S.	'	'
Property, Plant and Equipment, Net by Geographic Location	'	'
Property, Plant and Equipment, Net by Geographic Location	4,174	4,697
Non - U.S.	'	'
Property, Plant and Equipment, Net by Geographic Location	'	'
Property, Plant and Equipment, Net by Geographic Location	$6,511	$6,571

Concentrations_Details

Concentrations (Details)

3 Months Ended

9 Months Ended

12 Months Ended

3 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Consulting fee revenue

Consulting fee revenue

Consulting fee revenue

Consulting fee revenue

Accounts receivable

Accounts receivable

Total revenue

Total revenue

Total revenue

Total revenue

Total revenue

Total revenue

Total revenue

Total revenue

Customer concentration

Customer concentration

Customer concentration

Customer concentration

Customer concentration

Customer concentration

Customer concentration

Customer concentration

Customer concentration

Customer concentration

Contracts with U.S. federal government agencies

Contracts with U.S. federal government agencies

Contracts with U.S. federal government agencies

Contracts with U.S. federal government agencies

item

item

item

item

item

item

item

item

item

item

Concentrations of Credit Risk

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Number of clients

1

0

1

0

1

1

1

0

0

0

'

'

'

'

Percentage of concentration risk

11.00%

'

10.00%

'

24.00%

28.00%

10.00%

'

'

'

3.00%

3.00%

3.00%

3.00%

Commitments_and_Contingencies_

Commitments and Contingencies (Details)	9 Months Ended				9 Months Ended	3 Months Ended
	Sep. 30, 2013	Sep. 30, 2013	Sep. 30, 2013	Apr. 30, 2013	Sep. 30, 2013	Mar. 31, 2013	Mar. 31, 2013
	USD ($)	Gerens Hill	Gerens Hill	Gerens Hill	Plaintiff	Hill International N.V.	Hill International N.V.
		USD ($)	EUR (€)		USD ($)	USD ($)	BRL
Commitments and Contingencies	'	'	'	'	'	'	'
Possible loss contingency	'	'	'	'	$8,771,000	'	'
Invoices accrued plus interest	'	'	'	'	2,340,000	'	'
Interest accrued	'	'	'	'	448,000	'	'
Minority shareholders ownership percentage	'	'	'	6.80%	'	'	'
Value of shares purchased on exercise of put options	'	2,526,000	1,915,000	'	'	'	'
Accrual for employment taxes	3,600,000	'	'	'	'	'	'
Reversal of indemnification liability	'	'	'	'	'	$873,000	1,950,000