Heidrick & Struggles International (HSII) 10-K 27 Feb 23 2022 FY Annual report Financial data

Cover

Cover - USD ($)	12 Months Ended
	Dec. 31, 2022	Feb. 24, 2023	Jun. 30, 2022
Cover [Abstract]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2022
Current Fiscal Year End Date	--12-31
Document Transition Report	false
Entity File Number	0-25837
Entity Registrant Name	HEIDRICK & STRUGGLES INTERNATIONAL, INC.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	36-2681268
Entity Address, Address Line One	233 South Wacker Drive
Entity Address, Address Line Two	Suite 4900
Entity Address, City or Town	Chicago
Entity Address, State or Province	IL
Entity Address, Postal Zip Code	60606-6303
City Area Code	(312)
Local Phone Number	496-1200
Title of 12(b) Security	Common Stock, $.01 par value
Trading Symbol	HSII
Security Exchange Name	NASDAQ
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	true
Entity Shell Company	false
Entity Public Float			$ 523,971,000
Entity Common Stock, Shares Outstanding		19,861,207
Amendment Flag	false
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	FY
Entity Central Index Key	0001066605

Audit Information

Audit Information	12 Months Ended
	Dec. 31, 2022
Audit Information [Abstract]
Auditor Firm ID	49
Auditor Name	RSM US LLP
Auditor Location	Chicago, Illinois

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($)	Dec. 31, 2022	Dec. 31, 2021
Current assets
Cash and cash equivalents	$ 355,447,000	$ 545,225,000
Marketable securities	266,169,000	0
Accounts receivable, net of allowances of $6,643 and $5,666, respectively	126,437,000	133,750,000
Prepaid expenses	24,098,000	21,754,000
Other current assets	40,722,000	41,449,000
Income taxes recoverable	10,946,000	3,210,000
Total current assets	823,819,000	745,388,000
Non-current assets
Property and equipment, net	30,207,000	27,085,000
Operating lease right-of-use assets	71,457,000	72,320,000
Assets designated for retirement and pension plans	11,332,000	12,715,000
Investments	34,354,000	36,051,000
Other non-current assets	25,788,000	23,377,000
Goodwill	138,361,000	138,524,000
Other intangible assets, net	6,333,000	9,169,000
Deferred income taxes, net	33,987,000	42,169,000
Total non-current assets	351,819,000	361,410,000
Total assets	1,175,638,000	1,106,798,000
Current liabilities
Accounts payable	14,613,000	20,374,000
Accrued salaries and benefits	451,161,000	409,026,000
Deferred revenue	43,057,000	51,404,000
Operating lease liabilities	19,554,000	19,332,000
Other current liabilities	56,016,000	24,554,000
Income taxes payable	4,076,000	10,004,000
Total current liabilities	588,477,000	534,694,000
Non-current liabilities
Accrued salaries and benefits	59,467,000	73,779,000
Retirement and pension plans	48,456,000	55,593,000
Operating lease liabilities	63,299,000	65,625,000
Other non-current liabilities	5,293,000	41,087,000
Total non-current liabilities	176,515,000	236,084,000
Total liabilities	764,992,000	770,778,000
Commitments and contingencies (Note 20)
Stockholders’ equity
Preferred stock, $0.01 par value, 10,000,000 shares authorized, no shares issued at December 31, 2022 and 2021.	0	0
Common stock, $0.01 par value, 100,000,000 shares authorized, 19,866,287 and 19,596,607 shares issued, 19,861,207 and 19,591,527 shares outstanding at December 31, 2022 and 2021, respectively	199,000	196,000
Treasury stock at cost, 5,080 shares at December 31, 2022 and 2021, respectively	(191,000)	(191,000)
Additional paid in capital	246,630,000	233,163,000
Retained earnings	168,197,000	101,177,000
Accumulated other comprehensive income (loss)	(4,189,000)	1,675,000
Total stockholders’ equity	410,646,000	336,020,000
Total liabilities and stockholders’ equity	$ 1,175,638,000	$ 1,106,798,000

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Statement of Financial Position [Abstract]
Accounts receivable, allowance for credit loss	$ 6,643	$ 5,666
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)	10,000,000	10,000,000
Preferred stock, shares issued (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	100,000,000	100,000,000
Common stock, shares issued (in shares)	19,866,287	19,596,607
Common stock, shares outstanding (in shares)	19,861,207	19,591,527
Treasury stock, shares (in shares)	5,080	5,080

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Revenue
Total revenue	$ 1,083,586,000	$ 1,008,474,000	$ 629,370,000
Operating expenses
Salaries and benefits	737,430,000	717,411,000	450,424,000
General and administrative expenses	132,678,000	130,749,000	116,982,000
Research and development	20,414,000	0	0
Impairment charges	0	0	32,970,000
Restructuring charges	0	3,792,000	52,372,000
Total operating expenses	971,320,000	910,210,000	664,899,000
Operating income (loss)	112,266,000	98,264,000	(35,529,000)
Interest, net	5,337,000	302,000	204,000
Other, net	(2,367,000)	7,463,000	3,927,000
Net non-operating income	2,970,000	7,765,000	4,131,000
Income (loss) before income taxes	115,236,000	106,029,000	(31,398,000)
Provision for income taxes	35,750,000	33,457,000	6,309,000
Net income (loss)	79,486,000	72,572,000	(37,707,000)
Foreign currency translation adjustment	(8,457,000)	(1,890,000)	82,000
Net unrealized loss on available-for-sale investments	(41,000)	0	(13,000)
Pension gain (loss) adjustment	2,634,000	148,000	(476,000)
Other comprehensive loss, net of tax	(5,864,000)	(1,742,000)	(407,000)
Comprehensive income (loss)	$ 73,622,000	$ 70,830,000	$ (38,114,000)
Weighted-average common shares outstanding
Weighted-average common shares outstanding, basic (in shares)	19,758,000	19,515,000	19,301,000
Weighted-average common shares outstanding, diluted (in shares)	20,618,000	20,296,000	19,301,000
Earnings (loss) per common share
Earnings (loss) per common share, basic (in dollars per share)	$ 4.02	$ 3.72	$ (1.95)
Earnings (loss) per common share, diluted (in dollars per share)	3.86	3.58	(1.95)
Cash dividends paid per share (in dollars per share)	$ 0.60	$ 0.60	$ 0.60
Service
Revenue
Revenue	$ 1,073,464,000	$ 1,003,001,000	$ 621,615,000
Reimbursements
Revenue
Revenue	10,122,000	5,473,000	7,755,000
Operating expenses
Cost of services and reimbursed expenses	10,122,000	5,473,000	7,755,000
Cost of services
Operating expenses
Cost of services and reimbursed expenses	$ 70,676,000	$ 52,785,000	$ 4,396,000

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Cash flows - operating activities
Net income (loss)	$ 79,486,000	$ 72,572,000	$ (37,707,000)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	10,603,000	19,560,000	26,656,000
Deferred income taxes	7,088,000	(7,481,000)	(1,680,000)
Stock-based compensation expense	16,689,000	12,760,000	10,199,000
Accretion expense related to earnout payments	820,000	486,000	0
Impairment charges	0	0	32,970,000
Gain on marketable securities	(2,406,000)	(1,000)	(154,000)
Loss on disposal of property and equipment	392,000	135,000	287,000
Changes in assets and liabilities, net of effects of acquisitions:
Accounts receivable	4,522,000	(36,819,000)	22,644,000
Accounts payable	(5,731,000)	(332,000)	451,000
Accrued expenses	32,892,000	230,177,000	(26,513,000)
Restructuring accrual	0	(5,061,000)	2,479,000
Deferred revenue	(7,237,000)	12,783,000	(3,688,000)
Income taxes recoverable (payable), net	(13,606,000)	11,377,000	(4,016,000)
Retirement and pension plan assets and liabilities	(479,000)	1,145,000	1,794,000
Prepaid expenses	(2,850,000)	(2,776,000)	1,642,000
Other assets and liabilities, net	(895,000)	(37,124,000)	(2,011,000)
Net cash provided by operating activities	119,288,000	271,401,000	23,353,000
Cash flows - investing activities
Acquisition of businesses, net of cash acquired	0	(33,518,000)	0
Capital expenditures	(11,134,000)	(6,240,000)	(7,322,000)
Purchases of available for sale investments	(269,824,000)	(2,323,000)	(118,904,000)
Proceeds from sale of available for sale investments	1,359,000	20,822,000	158,852,000
Net cash provided by (used in) investing activities	(279,599,000)	(21,259,000)	32,626,000
Cash flows - financing activities
Proceeds from line of credit	0	0	100,000,000
Payments on line of credit	0	0	(100,000,000)
Cash dividends paid	(12,466,000)	(12,377,000)	(12,063,000)
Payment of employee tax withholdings on equity transactions	(3,219,000)	(3,140,000)	(1,550,000)
Acquisition earnout payments	0	0	(2,789,000)
Net cash used in financing activities	(15,685,000)	(15,517,000)	(16,402,000)
Effect of exchange rates fluctuations on cash, cash equivalents and restricted cash	(13,774,000)	(5,855,000)	5,193,000
Net increase (decrease) in cash, cash equivalents and restricted cash	(189,770,000)	228,770,000	44,770,000
Cash, cash equivalents and restricted cash at beginning of period	545,259,000	316,489,000	271,719,000
Cash, cash equivalents and restricted cash at end of period	355,489,000	545,259,000	316,489,000
Cash paid for
Income taxes	41,910	28,623	12,154
Interest	$ 0	$ 0	$ 761

Consolidated Statements of Chan

Consolidated Statements of Changes In Stockholders' Equity - USD ($)	Total	Adoption of accounting standards	Common Stock	Treasury Stock	Additional Paid in Capital	Retained Earnings	Retained Earnings Adoption of accounting standards	Accumulated Other Comprehensive Income
Common stock, shares outstanding at beginning of period (in shares) at Dec. 31, 2019			19,586,000	420,000
Equity at beginning of period at Dec. 31, 2019	$ 309,115,000		$ 196,000	$ (14,795,000)	$ 228,807,000	$ 91,083,000		$ 3,824,000
Net (loss) income	(37,707,000)					(37,707,000)
Other comprehensive loss, net of tax	(407,000)							(407,000)
Common and treasury stock transactions:
Stock-based compensation	10,199,000				10,199,000
Vesting of equity, net of tax withholdings (in shares)				179,000
Vesting of equity, net of tax withholdings	(1,550,000)			$ 6,225,000	(7,775,000)
Re-issuance of treasury stock (in shares)				15,000
Re-issuance of treasury stock	346,000			$ 529,000	(183,000)
Cash dividends declared	(11,576,000)					(11,576,000)
Dividend equivalents on restricted stock units	(486,000)					(486,000)
Common stock, shares outstanding at end of period (in shares) at Dec. 31, 2020			19,586,000	226,000
Equity at end of period at Dec. 31, 2020	267,602,000		$ 196,000	$ (8,041,000)	231,048,000	40,982,000		3,417,000
Adoption of accounting standards		$ (332,000)					$ (332,000)
Net (loss) income	72,572,000					72,572,000
Other comprehensive loss, net of tax	(1,742,000)							(1,742,000)
Common and treasury stock transactions:
Stock-based compensation	12,760,000				12,760,000
Vesting of equity, net of tax withholdings (in shares)			11,000	213,000
Vesting of equity, net of tax withholdings	(3,140,000)			$ 7,570,000	(10,710,000)
Re-issuance of treasury stock (in shares)				8,000
Re-issuance of treasury stock	345,000			$ 280,000	65,000
Cash dividends declared	(11,708,000)					(11,708,000)
Dividend equivalents on restricted stock units	$ (669,000)					(669,000)
Common stock, shares outstanding at end of period (in shares) at Dec. 31, 2021	19,591,527		19,597,000	5,000
Equity at end of period at Dec. 31, 2021	$ 336,020,000		$ 196,000	$ (191,000)	233,163,000	101,177,000		1,675,000
Net (loss) income	79,486,000					79,486,000
Other comprehensive loss, net of tax	(5,864,000)							(5,864,000)
Common and treasury stock transactions:
Stock-based compensation	16,689,000				16,689,000
Vesting of equity, net of tax withholdings (in shares)			269,000
Vesting of equity, net of tax withholdings	(3,219,000)		$ 3,000		(3,222,000)
Cash dividends declared	(11,857,000)					(11,857,000)
Dividend equivalents on restricted stock units	$ (609,000)					(609,000)
Common stock, shares outstanding at end of period (in shares) at Dec. 31, 2022	19,861,207		19,866,000	5,000
Equity at end of period at Dec. 31, 2022	$ 410,646,000		$ 199,000	$ (191,000)	$ 246,630,000	$ 168,197,000		$ (4,189,000)

Consolidated Statements of Ch_2

Consolidated Statements of Changes In Stockholders' Equity (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Statement of Stockholders' Equity [Abstract]
Cash dividends per share (in dollars per share)	$ 0.60	$ 0.60	$ 0.60

Basis of Presentation

Basis of Presentation	12 Months Ended
	Dec. 31, 2022
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation Heidrick & Struggles International, Inc. and subsidiaries (the “Company”) is a leadership advisory firm providing executive search, consulting and on-demand talent services. We help our clients build leadership teams by facilitating the recruitment, management and development of senior executives. The Company operates globally, including Executive Search operating segments in the Americas, Europe and Asia Pacific. The consolidated financial statements include Heidrick & Struggles International, Inc. and its wholly owned subsidiaries and have been prepared using accounting principles generally accepted in the United States of America (“GAAP”). The preparation of these financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets, liabilities, revenues and expenses. Significant items subject to estimates and assumptions include revenue recognition, allowances for deferred tax assets and liabilities, and the assessment of goodwill, other intangible assets and long-lived assets for impairment. Estimates are subject to a degree of uncertainty and actual results could differ from these estimates.

Summary of Significant Accounti

Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2022
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Summary of Significant Accounting Policies Cash and Cash Equivalents The Company considers all highly liquid instruments with an original maturity of three months or less to be cash equivalents. Marketable Securities The Company’s marketable securities consist of available-for-sale debt securities with original maturities exceeding three months. Concentration of Risk The Company is potentially exposed to concentrations of risk associated with its accounts receivable. However, this risk is limited due to the Company’s large number of clients and their dispersion across many different industries and geographies. At December 31, 2022 and 2021, the Company had no significant concentrations of risk. Accounts Receivable The Company’s accounts receivable consists of trade receivables. The Company’s expected credit loss allowance methodology for accounts receivable is developed using historical collection experience, current and future economic and market conditions, and a review of the current status of customers' trade accounts receivables. These factors may change over time, impacting the allowance level. See Note 4, Credit Losses . Fair Value of Financial Instruments Cash equivalents are stated at cost, which approximates fair value. The carrying value for receivables from clients, accounts payable, deferred revenue and other accrued liabilities reasonably approximates fair value due to the nature of the financial instruments and the short-term nature of the items. Property and Equipment Property and equipment are stated at cost. Depreciation is computed using the straight-line method over the estimated useful life of the asset or, for leasehold improvements, the shorter of the lease term or the estimated useful life of the asset, as follows: Office furniture, fixtures and equipment 5–10 years Computer equipment and software 3–7 years Leasehold improvements are depreciated over the lesser of the lease term or life of the asset improvement, which typically range from three to ten years. Depreciation is calculated for tax purposes using accelerated methods, where applicable. Other Intangible Assets and Long Lived Assets The Company reviews its other intangible assets and long-lived assets, including property and equipment and right-of-use assets, for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset group may not be recoverable. Recoverability of asset groups to be held and used is measured by a comparison of the carrying amount of an asset group to estimated undiscounted future cash flows expected to be generated by the asset group. If the carrying amount of an asset group exceeds its estimated future cash flows, an impairment charge, equal to the amount by which the carrying amount of the asset group exceeds the fair value of the asset group, is recognized. Leases The Company determines if an arrangement is a lease at inception. Operating leases are included in Operating Lease Right-of-Use Assets , Operating Lease Liabilities - Current and Operating Lease Liabilities - Non-Current in our Consolidated Balance Sheets. The Company does not have any leases that meet the finance lease criteria. Right-of-use assets represent the Company's right to use an underlying asset for the lease term and lease liabilities represent the Company's obligation to make lease payments arising from the lease. Operating lease right-of-use assets and liabilities are recognized on the commencement date based on the present value of lease payments over the lease term. As most of the Company's leases do not provide an implicit rate, an incremental borrowing rate based on the information available at the commencement date is used in determining the present value of lease payments. The operating lease right-of-use asset also includes any lease payments made in advance and any accrued rent expense balances. Lease terms may include options to extend or terminate the lease when it is reasonably certain that the option will be exercised. Lease expense for lease payments is recognized on a straight-line basis over the lease term. The Company has lease agreements with lease and non-lease components. For office leases, the Company accounts for the lease and non-lease components as a single lease component. For equipment leases, such as vehicles and office equipment, the Company accounts for the lease and non-lease components separately. Investments The Company’s investments consist primarily of available-for-sale equity investments within the U.S. non-qualified deferred compensation plan (the “Plan”). Available-for-sale investments are reported at fair value with changes in unrealized gains (losses) and realized gains (losses) recorded as a non-operating expense in Other, net in the Consolidated Statements of Comprehensive Income (Loss). Goodwill Goodwill represents the difference between the purchase price of acquired companies and the related fair value of the net assets acquired, which is accounted for by the acquisition method of accounting. The Company performs assessments of the carrying value of goodwill at least annually and whenever events occur or circumstances indicate that a carrying amount of goodwill may not be recoverable. These circumstances include a significant change in business climate, attrition of key personnel, changes in financial condition or results of operations, a prolonged decline in the Company’s stock price and market capitalization, competition, and other factors. The goodwill impairment test compares the fair value of a reporting unit to its carrying amount, including goodwill. The Company operates five reporting units: Americas, Europe (which includes Africa), Asia Pacific (which includes the Middle East), On-Demand Talent and Heidrick Consulting. The goodwill impairment test is completed by comparing the fair value of a reporting unit with its carrying amount. The fair value of each of the Company’s reporting units is determined using a discounted cash flow methodology. An impairment charge is recognized for the amount by which the carrying value of the reporting unit exceeds its fair value; however, the loss recognized is not to exceed the total amount of goodwill allocated to that reporting unit. Restructuring Charges The Company accounts for restructuring charges by recognizing a liability at fair value when the costs are incurred. Revenue Recognition See Note 3, Revenue . Cost of Services Cost of services consists of third-party contractor costs related to the delivery of various services in the Company's On-Demand Talent and Heidrick Consulting operating segments. Research and Development Research and development (“R&D”) consist of payroll, employee benefits, stock-based compensation, other employee expenses and third-party professional fees associated with the development of new technologies to enhance existing products and services and to expand the range of the Company's offerings. The benefits from our R&D efforts are intended to be utilized to develop and enhance new and existing services and products across our current offerings in Executive Search, Heidrick Consulting, On-Demand Talent and for products and services in new segments that we embark upon in the future from time to time. Reimbursements The Company incurs certain out-of-pocket expenses that are reimbursed by its clients, which are accounted for as revenue and expense in its Consolidated Statements of Comprehensive Income (Loss). Salaries and Benefits Salaries and benefits consist of compensation and benefits paid to consultants, executive officers, and administrative and support personnel, of which the most significant elements are salaries and annual performance-related bonuses. Other items in this category are expenses related to sign-on bonuses, forgivable employee loans and minimum guaranteed bonuses (often incurred in connection with the hiring of new consultants), restricted stock unit, phantom stock unit and performance stock unit amortization, payroll taxes, profit sharing and retirement benefits, and employee insurance benefits. Salaries and benefits are recognized on an accrual basis. Certain sign-on bonuses, retention awards, and minimum guaranteed compensation are capitalized and amortized in accordance with the terms of the respective agreements. Historically, a portion of the Company’s consultants’ and management cash bonuses were deferred and paid over a three-year vesting period. The portion of the bonus was approximately 15% depending on the employee’s level or position. The compensation expense related to the amounts being deferred was recognized on a graded vesting attribution method over the requisite service period. This service period began on January 1 of the respective fiscal year and continued through the deferral date, which coincided with the Company’s bonus payments in the first half of the following year and for an additional three-year vesting period. In 2020, the Company terminated the cash bonus deferral for consultants and, in 2021, terminated the cash bonus deferral for management. The Company now pays 100% of the cash bonuses earned by consultants and management in the first half of the following year. Consultant and management cash bonuses earned prior to 2020 and 2021, respectively, will continue to be paid under the terms of the cash bonus deferral program. The deferrals are recorded in Accrued salaries and benefits within both Current liabilities and Non-current liabilities in the Consolidated Balance Sheets. Income Taxes Deferred tax assets and liabilities are determined based on the differences between the financial statement and tax basis of assets and liabilities, applying enacted statutory tax rates in effect for the year in which the tax differences are expected to reverse. Deferred tax assets are reduced by a valuation allowance when, in the opinion of management, it is more likely than not that some portion or all of the deferred tax assets will not be realized. Deferred tax assets and liabilities are adjusted for the effects of changes in tax laws and rates on the date of enactment. Earnings per Common Share Basic earnings per common share is computed by dividing net income by weighted average common shares outstanding for the year. Diluted earnings per share reflect the potential dilution that could occur if securities or other contracts to issue common stock were exercised or converted. Common equivalent shares are excluded from the determination of diluted earnings per share in periods in which they have an anti-dilutive effect. The following table sets forth the computation of basic and diluted earnings (loss) per share: December 31, 2022 2021 2020 Net income (loss) $ 79,486 $ 72,572 $ (37,707) Weighted average shares outstanding: Basic 19,758 19,515 19,301 Effect of dilutive securities: Restricted stock units 644 587 — Performance stock units 216 194 — Diluted 20,618 20,296 19,301 Basic earnings (loss) per share $ 4.02 $ 3.72 $ (1.95) Diluted earnings (loss) per share $ 3.86 $ 3.58 $ (1.95) Weighted average restricted stock units and performance stock units outstanding that could be converted into approximately 472,000 and 120,000 common shares, respectively, for the year ended December 31, 2020, were not included in the computation of diluted earnings per share because the effects would be anti-dilutive. Translation of Foreign Currencies The Company generally designates the local currency for all its subsidiaries as the functional currency. The Company translates the assets and liabilities of its subsidiaries into U.S. dollars at the current rate of exchange prevailing at the balance sheet date. Revenue and expenses are translated at a monthly average exchange rate for the period. Translation adjustments are reported as a component of Accumulated other comprehensive income . Restricted Cash Periodically, the Company is party to agreements with terms that require the Company to restrict cash through the termination dates of the agreements. Current and non-current restricted cash is included in Other current assets and Other non-current assets , respectively, in the Consolidated Balance Sheets. The following table provides a reconciliation of the cash and cash equivalents between the Consolidated Balance Sheets and the Consolidated Statement of Cash Flows as of December 31, 2022, 2021 and 2020: December 31, 2022 2021 2020 Cash and cash equivalents $ 355,447 $ 545,225 $ 316,473 Restricted cash included within other non-current assets 42 34 16 Total cash, cash equivalents and restricted cash $ 355,489 $ 545,259 $ 316,489 Recently Issued Financial Accounting Standards In March 2020, the FASB issued ASU No. 2020-04, Facilitation of the Effects of Reference Rate Reform on Financial Reporting. The guidance is intended to provide temporary optional expedients and exceptions to the guidance on contract modifications and hedge accounting to ease the financial reporting burdens related to the expected market transition from the London Interbank Offered Rate (LIBOR) and other interbank offered rates to alternative reference rates. This guidance is effective March 12, 2020, and the Company may elect to apply the amendments prospectively through December 31, 2024. The Company is currently evaluating the impact of this accounting guidance. The adoption of this guidance is not anticipated to have a material impact on the consolidated financial statements.

Revenue (Notes)

Revenue (Notes)	12 Months Ended
	Dec. 31, 2022
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer	Revenue Executive Search Revenue is recognized as performance obligations are satisfied by transferring a good or service to a client. Generally, each executive search contract contains one performance obligation which is the process of identifying potentially qualified candidates for a specific client position. In most contracts, the transaction price includes both fixed and variable consideration. Fixed compensation is comprised of a retainer, equal to approximately one-third of the estimated first year compensation for the position to be filled, and indirect expenses, equal to a specified percentage of the retainer, as defined in the contract. The Company generally bills clients for the retainer and indirect expenses in one-third increments over a three-month period commencing in the month of a client’s acceptance of the contract. If actual compensation of a placed candidate exceeds the original compensation estimate, the Company is often authorized to bill the client for one-third of the excess compensation. The Company refers to this additional billing as uptick revenue. In most contracts, variable consideration is comprised of uptick revenue and direct expenses. The Company bills its clients for uptick revenue upon completion of the executive search, and direct expenses are billed as incurred. The Company estimates uptick revenue at contract inception, based on a portfolio approach, utilizing the expected value method based on a historical analysis of uptick revenue realized in the Company’s geographic regions and industry practices, and initially records a contract’s uptick revenue in an amount that is probable not to result in a significant reversal of cumulative revenue recognized when the actual amount of uptick revenue for the contract is known. Differences between the estimated and actual amounts of variable consideration are recorded when known. The Company does not estimate revenue for direct expenses as it is not materially different than recognizing revenue as direct expenses are incurred. Revenue from executive search engagement performance obligations is recognized over time as clients simultaneously receive and consume the benefits provided by the Company's performance. Revenue from executive search engagements is recognized over the expected average period of performance, in proportion to the estimated personnel time incurred to fulfill the obligations under the executive search contract. Revenue is generally recognized over a period of approximately six months. The Company's executive search contracts contain a replacement guarantee which provides for an additional search to be completed, free of charge except for expense reimbursements, should the candidate presented by the Company be hired by the client and subsequently terminated by the client for performance reasons within a specified period of time. The replacement guarantee is an assurance warranty, which is not a performance obligation under the terms of the executive search contract, as the Company does not provide any services under the terms of the guarantee that transfer benefits to the client in excess of assuring that the identified candidate complies with the agreed-upon specifications. The Company accounts for the replacement guarantee under the relevant warranty guidance in ASC 460 - Guarantees. On-Demand Talent The Company enters into contracts with clients that outline the general terms and conditions of the assignment to provide on-demand consultants for various types of consulting projects, which consultants may be independent contractors or temporary employees. The consideration the Company expects to receive under each contract is dependent on the time-based fees specified in the contract. Revenue from on-demand engagement performance obligations is recognized over time as clients simultaneously receive and consume the benefits provided by the Company's performance. The Company has applied the practical expedient to recognize revenue for these services in the amount to which the Company has a right to invoice the client, as this amount corresponds directly with the value provided to the client for the performance completed to date. For transactions where a third-party contractor is involved in providing the services to the client, the Company reports the revenue and the related direct costs on a gross basis as it has determined that it is the principal in the transaction. The Company is primarily responsible for fulfilling the promise to provide consulting services to its clients and the Company has discretion in establishing the prices charged to clients for the consulting services and is able to contractually obligate the independent service provider to deliver services and deliverables that the Company has agreed to provide to its clients. Heidrick Consulting Revenue is recognized as performance obligations are satisfied by transferring a good or service to a client. Heidrick Consulting enters into contracts with clients that outline the general terms and conditions of the assignment to provide succession planning, executive assessment, top team and board effectiveness and culture shaping programs. The consideration the Company expects to receive under each contract is generally fixed. Most of the Company's consulting contracts contain one performance obligation, which is the overall process of providing the consulting service requested by the client. The majority of our consulting revenue is recognized over time utilizing both input and output methods. Contracts that contain coaching sessions, training sessions or the completion of assessments are recognized using the output method as each session or assessment is delivered to the client. Contracts that contain general consulting work are recognized using the input method utilizing a measure of progress that is based on time incurred on the project. The Company enters into enterprise agreements with clients to provide a license for online access, via the Company's Culture Connect platform, to training and other proprietary material related to the Company's culture shaping programs. The consideration the Company expects to receive under the terms of an enterprise agreement is comprised of a single fixed fee. The enterprise agreements contain multiple performance obligations, the delivery of materials via Culture Connect and material rights related to options to renew enterprise agreements at a significant discount. The Company allocates the transaction price to the performance obligations in the contract on a stand-alone selling price basis. The stand-alone selling price for the initial term of the enterprise agreement is outlined in the contract and is equal to the price paid by the client for the agreement over the initial term of the contract. The stand-alone selling price for the options to renew, or material right, are not directly observable and must be estimated. This estimate is required to reflect the discount the client would obtain when exercising the option to renew, adjusted for the likelihood that the option will be exercised. The Company estimates the likelihood of renewal using a historical analysis of client renewals. Access to Culture Connect represents a right to access the Company’s intellectual property that the client simultaneously receives and consumes as the Company performs under the agreement, and therefore the Company recognizes revenue over time. Given the continuous nature of this commitment, the Company utilizes straight-line ratable revenue recognition over the estimated subscription period as the Company's clients will receive and consume the benefits from Culture Connect equally throughout the contract period. Revenue related to client renewals of enterprise agreements is recognized over the term of the renewal, which is generally twelve months. Enterprise agreements do not comprise a significant portion of the Company's revenue. Contract Balances Contract assets and liabilities are reported in a net position on a contract-by-contract basis at the end of each reporting period. Contract assets and liabilities are classified as current due to the nature of the Company's contracts, which are completed within one year. Contract assets are included within Other current assets on the Consolidated Balance Sheets. Unbilled receivables: Unbilled revenue represents contract assets from revenue recognized over time in excess of the amount billed to the client and the amount billed to the client is solely dependent upon the passage of time. This amount includes revenue recognized in excess of billed executive search retainers and Heidrick Consulting fees. Contract assets: Contract assets represent revenue recognized over time in excess of the amount billed to the client and the amount billed to the client is not solely subject to the passage of time. This amount primarily includes revenue recognized for upticks and contingent placement fees in executive search contracts. Deferred revenue: Contract liabilities consist of deferred revenue, which is equal to billings in excess of revenue recognized. The following table outlines the changes in our contract asset and liability balances for the years ended: December 31, 2022 2021 Change Contract assets Unbilled receivables, net $ 13,940 $ 17,947 $ (4,007) Contract assets 21,348 18,995 2,353 Total contract assets 35,288 36,942 (1,654) Contract liabilities Deferred revenue $ 43,057 $ 51,404 $ (8,347) During the year ended December 31, 2022, we recognized revenue of $46.2 million that was included in the contract liabilities balance at the beginning of the period. The amount of revenue recognized during the year ended December 31, 2022, from performance obligations partially satisfied in previous periods as a result of changes in the estimates of variable consideration was $22.3 million. Each of the Company's contracts with clients has an expected duration of one year or less. Accordingly, the Company has elected to utilize the available practical expedient related to the disclosure of the transaction price allocated to the remaining

Credit Losses

Credit Losses	12 Months Ended
	Dec. 31, 2022
Credit Loss [Abstract]
Allowance for Doubtful Accounts	Credit Losses The Company is exposed to credit losses primarily through the provision of its executive search, consulting, and on-demand talent services. The Company’s expected credit loss allowance methodology for accounts receivable is developed using historical collection experience, current and future economic and market conditions and a review of the current status of customers' trade accounts receivables. Due to the short-term nature of such receivables, the estimate of amount of accounts receivable that may not be collected is primarily based on historical loss-rate experience. When required, the Company adjusts the loss-rate methodology to account for current conditions and reasonable and supportable expectations of future economic and market conditions. The Company generally assesses future economic conditions for a period of sixty to ninety days, which corresponds with the contractual life of its accounts receivables. Additionally, specific allowance amounts are established to record the appropriate provision for customers that have a higher probability of default. The Company’s monitoring activities include timely account reconciliation, dispute resolution, payment confirmation, consideration of customers' financial condition and macroeconomic conditions. Balances are written off when determined to be uncollectible. The activity in the allowance for credit losses on the Company's trade receivables is as follows: December 31, 2022 2021 2020 Balance at January 1, $ 5,666 $ 6,557 $ 5,140 Provision for credit losses 7,938 4,991 6,696 Write-offs (6,830) (5,730) (5,418) Foreign currency translation (131) (152) 139 Balance at December 31, $ 6,643 $ 5,666 $ 6,557 The fair value and unrealized losses on available for sale debt securities, aggregated by investment category and the length of time the security has been in an unrealized loss position, are as follows: Less Than 12 Months Balance Sheet Classification Balance at December 31, 2022 Fair Value Unrealized Loss Cash and Cash Equivalents Marketable Securities U.S. Treasury securities $ 194,056 $ 56 $ 11,918 $ 182,138 The unrealized loss on one investment in U.S. Treasury securities at December 31, 2022 was caused by fluctuations in market interest rates. The contractual cash flows of these investments are guaranteed by an agency of the U.S. government. Accordingly, it is expected that the investments would not be settled at a price less than the amortized cost basis. The Company does not intend to sell the investments and it is not more likely than not that the Company will be required to sell the investments before the recovery of the amortized cost basis. There were no investments with unrealized losses at December 31, 2021.

Property and Equipment, net

Property and Equipment, net	12 Months Ended
	Dec. 31, 2022
Property, Plant and Equipment [Abstract]
Property and Equipment, net	Property and Equipment, net The components of the Company’s property and equipment are as follows: December 31, 2022 2021 Leasehold improvements $ 40,829 $ 42,252 Office furniture, fixtures and equipment 14,322 14,933 Computer equipment and software 30,085 24,293 Property and equipment, gross 85,236 81,478 Accumulated depreciation (55,029) (54,393) Property and equipment, net $ 30,207 $ 27,085 Depreciation expense for the years ended December 31, 2022, 2021 and 2020, was $7.4 million, $7.1 million and $8.1 million, respectively. As part of the Company's 2020 Plan (as defined below), property and equipment located at certain of the Company's offices was abandoned and the useful life of the assets were shortened to correspond with the cease-use date. As a result of the change in the useful life, approximately $0.9 million and $4.2 million of depreciation expense was accelerated and recorded in Restructuring charges in the Consolidated Statements of Comprehensive Income (Loss) and Depreciation and amortization in the Consolidated Statements of Cash Flows for the years ended December 31, 2021 and 2020, respectively.

Leases

Leases	12 Months Ended
	Dec. 31, 2022
Leases [Abstract]
Lessee	Leases The Company's lease portfolio is comprised of operating leases for office space and equipment. The majority of the Company's leases include both lease and non-lease components, which the Company accounts for differently depending on the underlying class of asset. Certain of the Company's leases include one or more options to renew or terminate the lease at the Company's discretion. Generally, the renewal and termination options are not included in the right-of-use assets and lease liabilities as they are not reasonably certain of exercise. The Company regularly evaluates the renewal and termination options and when they are reasonably certain of exercise, includes the renewal or termination option in the lease term. As most of the Company's leases do not provide an implicit interest rate, the Company utilizes an incremental borrowing rate based on the information available at the commencement date in determining the present value of lease payments. The Company has a centrally managed treasury function and therefore, a portfolio approach is applied in determining the incremental borrowing rate. The incremental borrowing rate is the rate of interest that the Company would have to pay to borrow on a fully collateralized basis over a similar term in an amount equal to the total lease payments in a similar economic environment. Office leases have remaining lease terms that range from less than one year to 10.6 years, some of which also include options to extend or terminate the lease. Most office leases contain both fixed and variable lease payments. Variable lease costs consist primarily of rent escalations based on an established index or rate and taxes, insurance, and common area or other maintenance costs, which are paid based on actual costs incurred by the lessor. The Company has elected to utilize the available practical expedient to not separate lease and non-lease components for office leases. As part of the Company's 2020 Plan (as defined below), a lease component related to one of the Company's offices was abandoned and the useful life of the associated right-of-use asset was shortened to correspond with the cease-use date. As a result of the change in useful life, approximately $8.7 million of right-of-use asset amortization was accelerated and recorded in Restructuring charges in the Condensed Consolidated Statements of Comprehensive Income (Loss) and Depreciation and amortization in the Condensed Consolidated Statements of Cash Flows during the year ended December 31, 2021. In September 2021, the Company entered into a termination and surrender agreement for this lease component. Under the terms of the agreement, the Company made a one-time payment of $11.7 million to release the Company from all remaining obligations under the lease. At the time of payment, the Company had accrued approximately $17.4 million of lease liabilities related to future payments under the remaining lease term. Upon making the one-time payment, the lease liabilities were relieved, resulting in a gain on termination of approximately $5.7 million, which is recorded in Restructuring charges in the Condensed Consolidated Statements of Comprehensive Income (Loss) for the year ended December 31, 2021. Equipment leases, which are comprised of vehicle and office equipment leases, have remaining terms that range from less than one year to 5.5 years, some of which also include options to extend or terminate the lease. The Company's equipment leases do not contain variable lease payments. The Company separates the lease and non-lease components for its equipment leases. Equipment leases do not comprise a significant portion of the Company's lease portfolio. Lease cost components included within General and Administrative Expenses in our Consolidated Statements of Comprehensive Income (Loss) for the year ended December 31, were as follows: December 31, 2022 2021 Operating lease cost $ 17,408 $ 18,912 Variable lease cost 6,116 4,949 Total lease cost $ 23,524 $ 23,861 Supplemental cash flow information related to the Company's operating leases for the year ended December 31, is as follows: December 31, 2022 2021 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 18,865 $ 40,473 Right-of-use assets obtained in exchange for lease obligations: Operating leases $ 18,055 $ 11,397 The weighted average remaining lease term and weighted average discount rate for our operating leases as of December 31, is as follows: December 31, 2022 2021 Weighted Average Remaining Lease Term Operating leases 6.3 years 6.4 years Weighted Average Discount Rate Operating leases 3.48 % 3.22 % The future maturities of the Company's operating lease liabilities for the years ended December 31, is as follows: Operating Lease Maturity 2023 $ 18,914 2024 19,521 2025 11,982 2026 10,491 2027 7,886 Thereafter 23,799 Total lease payments 92,593 Less: Interest (9,740) Present value of lease liabilities $ 82,853 The Company has an obligation at the end of the lease term to return certain offices to the landlord in its original condition, which is recorded at fair value at the time the liability is incurred. The Company had $2.8 million and $3.2 million of asset retirement obligations as of December 31, 2022 and 2021, respectively, which are recorded within Other current liabilities and Other non-current liabilities in the Consolidated Balance Sheets.

Financial Instruments and Fair

Financial Instruments and Fair Value	12 Months Ended
	Dec. 31, 2022
Fair Value Disclosures [Abstract]
Financial Instruments and Fair Value	Financial Instruments and Fair Value Cash, Cash Equivalents and Marketable Securities The Company's investments in marketable debt securities, which consist of U.S. Treasury bills, are classified and accounted for as available-for-sale. The Company classifies its marketable debt securities as either short-term or long-term based on each instrument's underlying contractual maturity date. Unrealized gains and losses on marketable debt securities classified as available-for-sale are recognized in Accumulated other comprehensive income in the Consolidated Balance Sheets until realized. The Company's cash, cash equivalents, and marketable securities by significant investment category are as follows: Amortized Cost Unrealized Gains Unrealized Losses Fair Value Cash and Cash Equivalents Marketable Securities Balance at December 31, 2022 Cash $ 247,198 $ — Level 1 (1) : Money market funds 62,338 U.S. Treasury securities 312,121 15 (56) 312,080 45,911 266,169 Total Level 1 312,121 15 (56) 312,080 108,249 266,169 Total $ 312,121 $ 15 $ (56) $ 312,080 $ 355,447 $ 266,169 Cash and Cash Equivalents Balance at December 31, 2021 Cash $ 265,233 Level 1 (1) : Money market funds 80,798 U.S. Treasury securities 199,194 Total Level 1 279,992 Total $ 545,225 (1) Level 1 – Quoted prices in active markets for identical assets and liabilities. Investments, Assets Designated for Retirement and Pension Plans and Associated Liabilities The Company has a U.S. non-qualified deferred compensation plan that consists primarily of U.S. marketable securities and mutual funds. The aggregate cost basis for these investments was $29.1 million and $22.9 million as of December 31, 2022 and December 31, 2021, respectively. The Company also maintains a pension plan for certain current and former employees in Germany. The pensions are individually fixed Euro amounts that vary depending on the function and the eligible years of service of the employee. The Company’s investment strategy is to support its pension obligations through reinsurance contracts. The BaFin—German Federal Financial Supervisory Authority—supervises the insurance companies and the reinsurance contracts. The BaFin requires each reinsurance contract to guarantee a fixed minimum return. The Company’s pension benefits are fully reinsured by group insurance contracts with ERGO Lebensversicherung AG, and the group insurance contracts are measured in accordance with BaFin guidelines (including mortality tables and discount rates) which are considered Level 2 inputs. The following tables provide a summary of the fair value measurements for each major category of investments, assets designated for retirement and pension plans and associated liabilities measured at fair value on a recurring basis: Balance Sheet Classification Fair Value Other Current Assets Assets Designated for Retirement and Pension Plans Investments Other Current Liabilities Retirement and Pension Plans Balance at December 31, 2022 Measured on a recurring basis: Level 1 (1) : U.S. non-qualified deferred compensation plan $ 34,354 $ — $ — $ 34,354 $ — $ — Level 2 (2) : Retirement and pension plan assets 12,584 1,252 11,332 — — — Pension benefit obligation (13,951) — — — (1,252) (12,699) Total Level 2 (1,367) 1,252 11,332 — (1,252) (12,699) Total $ 32,987 $ 1,252 $ 11,332 $ 34,354 $ (1,252) $ (12,699) Balance Sheet Classification Fair Value Other Current Assets Assets Designated for Retirement and Pension Plans Investments Other Current Liabilities Retirement and Pension Plans Balance at December 31, 2021 Measured on a recurring basis: Level 1 (1) : U.S. non-qualified deferred compensation plan $ 36,051 $ — $ — $ 36,051 $ — $ — Level 2 (2) : Retirement and pension plan assets 14,048 1,333 12,715 — — — Pension benefit obligation (19,594) — — — (1,333) (18,261) Total Level 2 (5,546) 1,333 12,715 — (1,333) (18,261) Total $ 30,505 $ 1,333 $ 12,715 $ 36,051 $ (1,333) $ (18,261) (1) Level 1 – Quoted prices in active markets for identical assets and liabilities. (2) Level 2 – Quoted prices in active markets for similar assets and liabilities, or other inputs that are observable for the asset or liability, either directly or indirectly, for substantially the full term of the financial instrument. Contingent Consideration The former owners of certain the Company's acquired businesses are generally eligible to receive additional cash consideration based on the attainment of certain operating metrics in the periods subsequent to acquisition. Contingent consideration and compensation are valued using significant inputs that are not observable in the market, which are defined as Level 3 inputs pursuant to fair value measurement accounting. The Company determines the fair value of contingent consideration and compensation using discounted cash flow models. The following table provides a reconciliation of the beginning and ending balance of Level 3 liabilities for the year ended December 31, 2022: Earnout Contingent Compensation Balance at December 31, 2021 $ (35,654) $ (4,141) Earnout accretion (820) — Compensation expense — (3,885) Fair value adjustment 464 — Foreign currency translation — (166) Balance at December 31, 2022 $ (36,010) $ (8,192) Earnout accruals of $36.0 million and zero were recorded within Other current liabilities as of December 31, 2022 and December 31, 2021, respectively, and earnout accruals of zero and $35.7 million were recorded within Other non-current liabilities as of December 31, 2022 and December 31, 2021, respectively. Contingent compensation accruals of $1.5 million and $6.7 million are recorded within current Accrued salaries and benefits and non-current Accrued salaries and benefits , respectively, at December 31, 2022. Contingent compensation accruals of $4.1 million are recorded within non-current Accrued salaries and benefits at December 31, 2021.

Acquisitions

Acquisitions	12 Months Ended
	Dec. 31, 2022
Business Combinations [Abstract]
Acquisitions	Acquisitions On April 1, 2021, the Company acquired Business Talent Group, LLC ("BTG"), a market-leader in sourcing high-end, on-demand independent talent. Under the terms of the merger agreement, the Company paid $32.6 million of initial consideration from existing cash for the outstanding equity of BTG. The former owners of BTG are eligible to receive additional cash consideration, which the Company estimated to be between $20.0 million and $30.0 million on the acquisition date, based on the achievement of certain revenue and operating income milestones for the period from acquisition through 2022. When estimating the present value of future cash consideration, the Company accrued $23.8 million as of the acquisition date for the earnout liability. During the year ended December 31, 2021, the Company increased the fair value of the earnout liability by $11.4 million due to BTG outperforming initial revenue and operating income estimates. As of December 31, 2022 and 2021, the Company has accrued $36.0 million and $35.7 million, respectively, for the earnout liability. The Company recorded $5.8 million for customer relationships, $3.1 million for software, $1.7 million for a trade name and $45.5 million of goodwill. The goodwill is primarily related to the acquired workforce and strategic fit. As of the acquisition date, the Company expected that all of the goodwill would be deductible for tax purposes. Included in the Company's results of operations for the year ended December 31, 2021 are $66.6 million of revenue, and $9.3 million of operating loss, from the acquired entity. On October 15, 2021, the Company acquired Heidrick & Struggles Finland OY ("H&S Finland"), a Finland-based executive search firm, for initial consideration of $1.6 million with an anticipated future payment to the former owners in 2023, subject to the achievement of certain agreed upon financial performance and operational targets, and continued employment with the Company through the payment date. As of December 31, 2022 and 2021, the Company has accrued $1.5 million and $0.1 million, respectively, for the contingent payment. The Company previously had an affiliate relationship with H&S Finland, whereby the Company had no financial investment in H&S Finland, but received licensing fees for the use of the Company's name and database. The Company recorded $1.5 million of goodwill. The goodwill is primarily related to the acquired workforce and strategic fit. Included in the Company's results of operations for the year ended December 31, 2021 are $1.1 million of revenue, and $0.5 million of operating income, from the acquired entity.

Goodwill and Other Intangible A

Goodwill and Other Intangible Assets	12 Months Ended
	Dec. 31, 2022
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Other Intangible Assets	Goodwill and Other Intangible Assets Goodwill The Company's goodwill by segment (for the segments that had recorded goodwill) is as follows: December 31, 2022 December 31, 2021 Executive Search Americas $ 91,383 $ 91,463 Europe 1,449 1,532 Total Executive Search 92,832 92,995 On-Demand Talent 45,529 45,529 Total goodwill $ 138,361 $ 138,524 Changes in the carrying amount of goodwill by segment for the years ended December 31, 2022, 2021, and 2020 were as follows: Executive Search Americas Europe Asia Pacific On-Demand Talent Total Goodwill $ 92,497 $ 25,579 $ 8,755 $ — $ 126,831 Accumulated impairment losses — — — — — Balance at December 31, 2019 92,497 25,579 8,755 — 126,831 Impairment — (24,475) (8,495) — (32,970) Foreign currency translation (854) (1,104) (260) — (2,218) Balance at December 31, 2020 91,643 — — — 91,643 BTG acquisition — — — 45,529 45,529 Finland acquisition — 1,532 — — 1,532 Foreign currency translation (180) — — — (180) Balance at December 31, 2021 91,463 1,532 — 45,529 138,524 Foreign currency translation (80) (83) — — (163) Goodwill 91,383 25,924 8,495 45,529 171,331 Accumulated impairment losses — (24,475) (8,495) — (32,970) Balance at December 31, 2022 $ 91,383 $ 1,449 $ — $ 45,529 $ 138,361 In April 2021, the Company acquired BTG and recorded $45.5 million of goodwill related to the acquisition in the On-Demand Talent operating segment. In October 2021, the Company acquired H&S Finland, and recorded $1.5 million of goodwill related to the acquisition in the Europe operating segment. During the 2022 fourth quarter, the Company conducted its annual goodwill impairment evaluation as of October 31, 2022 in accordance with ASU No. 2017-04, Intangibles - Goodwill and Other. The goodwill impairment test is completed by comparing the fair value of a reporting unit with its carrying amount. An impairment charge is recognized for the amount by which the carrying value of the reporting unit exceeds its fair value; however, the loss recognized is not to exceed the total amount of goodwill allocated to that reporting unit. The impairment test is considered for each of the Company’s reporting units that has goodwill as defined in the accounting standard for goodwill and intangible assets. The Company operates five reporting units: Americas, Europe (which includes Africa), Asia Pacific (which includes the Middle East), On-Demand Talent, and Heidrick Consulting. As of October 31, 2022, only the Americas, Europe, and On-Demand Talent reporting units had recorded goodwill. During the impairment evaluation process, the Company used a discounted cash flow methodology to estimate the fair value of each of its reporting units with goodwill. The discounted cash flow approach is dependent on a number of factors, including estimates of future market growth and trends, forecasted revenue and costs, capital investments, appropriate discount rates, certain assumptions to allocate shared costs, assets and liabilities, historical and projected performance of the reporting unit and the macroeconomic conditions affecting each of the Company’s reporting units. The assumptions used in the determination of fair value were (1) a forecast of growth in the near and long term; (2) the discount rate; (3) working capital investments; and (4) other factors. Based on the results of the impairment analysis, the fair values of the Americas, Europe, and On-Demand Talent reporting units exceeded their carrying values by 220%, 8% and 13%, respectively. During the twelve months ended December 31, 2020, the Company determined that the goodwill within the Europe and Asia Pacific reporting units was impaired, which resulted in impairment charges of $24.5 million and $8.5 million, respectively, to write off all of the goodwill associated with each of the reporting units. The impairment charges are recorded within Impairment charges in the Condensed Consolidated Statements of Comprehensive Income (Loss) for the twelve months ended December 31, 2020. The impairments were non-cash in nature and did not affect our liquidity, cash flows, borrowing capability or operations, nor did they impact the debt covenants under our credit agreement. Other Intangible Assets, net The Company’s other intangible assets, net by segment (for the segments that had recorded intangible assets), are as follows: December 31, 2022 December 31, 2021 Executive Search Americas $ 51 $ 103 Europe 216 463 Asia Pacific 15 33 Total Executive Search 282 599 On-Demand Talent 6,051 8,570 Total Other Intangible Assets, Net $ 6,333 $ 9,169 In April 2021, the Company acquired BTG and recorded customer relationships, software and trade name intangible assets in the On-Demand Talent operating segment of $5.8 million, $3.1 million and $1.7 million, respectively. The combined weighted-average amortization period for the acquired intangible assets is 7.4 years with amortization periods of 11.0, 3.0 and 3.0 years for the customer relationships, software and trade name, respectively. The carrying amount of amortizable intangible assets and the related accumulated amortization were as follows: December 31, 2022 December 31, 2021 Weighted Gross Carrying Amount Accumulated Amortization Net Gross Carrying Amount Accumulated Amortization Net Carrying Amount Client relationships 10.7 $ 10,720 $ (6,164) $ 4,556 $ 22,127 $ (16,495) $ 5,632 Trade name 3.1 2,406 (1,925) $ 481 2,441 (1,237) 1,204 Software 3.0 3,110 (1,814) 1,296 3,110 (777) 2,333 Total intangible assets 8.6 $ 16,236 $ (9,903) $ 6,333 $ 27,678 $ (18,509) $ 9,169 Intangible asset amortization expense for the years ended December 31, 2022, 2021 and 2020, was $3.2 million, $2.9 million and $0.7 million, respectively. The Company's estimated future amortization expense related to intangible assets as of December 31, 2022 for the years ended December 31, is as follows: 2023 2,723 2024 1,151 2025 762 2026 527 2027 384 Thereafter 786 Total 6,333

Other Current Assets

Other Current Assets	12 Months Ended
	Dec. 31, 2022
Other Liabilities Disclosure [Abstract]
Other Current Assets [Text Block]	Other Current Assets and Liabilities The components of other current assets are as follows: December 31, 2022 December 31, 2021 Contract assets $ 35,288 $ 36,942 Other 5,434 4,507 Total other current assets $ 40,722 $ 41,449 The components of other current liabilities are as follows: December 31, December 31, Earnout liability $ 36,010 $ — Other 20,006 24,554 Total other current liabilities $ 56,016 $ 24,554

Line of Credit

Line of Credit	12 Months Ended
	Dec. 31, 2022
Debt Disclosure [Abstract]
Line of Credit	Line of Credit On July 13, 2021, the Company entered into a First Amendment (as amended, the "First Amendment") to the Credit Agreement, dated as of October 26, 2018 (the "Credit Agreement"). The First Amendment provides the Company with a committed unsecured revolving credit facility in an aggregate amount of $200 million, increased from $175 million as set forth in the original agreement, which includes a sublimit of $25 million for letters of credit and a sublimit of $10 million for swingline loans, with a $75 million expansion feature. The First Amendment matures on July 13, 2026, extended from October 26, 2023 as set forth in the Credit Agreement. Borrowings under the First Amendment may be used for working capital, capital expenditures, permitted acquisitions, restricted payments and for other general corporate purposes of the Company and its subsidiaries. The obligations under the First Amendment are guaranteed by certain of the Company’s subsidiaries. During the year ended December 31, 2020, the Company borrowed $100.0 million under the Credit Agreement. The Company elected to draw down a portion of the available funds from its revolving line of credit as a precautionary measure to increase its cash position and further enhance its financial flexibility in light of the uncertainty in global markets resulting from the COVID-19 outbreak. The Company subsequently repaid $100.0 million during the year ended December 31, 2020. As of December 31, 2022, and 2021, the Company had no outstanding borrowings. The Company was in compliance with the financial and other covenants under the First Amendment and no event of default existed.

Employee Benefit Plans

Employee Benefit Plans	12 Months Ended
	Dec. 31, 2022
Postemployment Benefits [Abstract]
Employee Benefit Plans	Employee Benefit Plans Qualified Retirement Plan The Company has a defined contribution retirement plan (the “Plan”) for all eligible employees in the United States. Eligible employees may begin participating in the Plan upon their hire date. The Plan contains a 401(k) provision, which provides for employee pre-tax and/or Roth contributions, from 1% to 50% of their eligible compensation up to a combined maximum permitted by law. The Company matched employee contributions on a dollar-for-dollar basis per participant up to the greater of $6,000, or 6.0%, of eligible compensation for the years ended December 31, 2022, 2021 and 2020. Employees are eligible for the Company match immediately upon entry into the Plan. Those contributions vest annually, provided the employee is employed by the Company on the last day of the Plan year in which the match is made. The Plan also provides for employees who retire, die or become disabled during the Plan year to receive the Company match for that Plan year. The Plan provides that forfeitures will be used to reduce the Company’s contributions. Forfeitures are created by participants who terminate employment before becoming entitled to the Company’s matching contribution under the Plan. The Company also has the option of making discretionary contributions. There were no discretionary contributions made for the years ended December 31, 2022, 2021 and 2020. The expense that the Company incurred for matching employee contributions for the years ended December 31, 2022, 2021 and 2020, was $7.8 million, $6.8 million and $5.7 million, respectively. The Company maintains additional retirement plans in the Americas, Europe and Asia Pacific regions which the Company does not consider as material and, therefore, additional disclosure has not been presented. Deferred Compensation Plans The Company has a deferred compensation plan for certain U.S. employees (the “U.S. Plan”) that became effective on January 1, 2006. The U.S. Plan allows participants to defer up to 25% of their base compensation and up to the lesser of $500,000 or 25% of their eligible bonus compensation into several different investment vehicles. These deferrals are immediately vested and are not subject to a risk of forfeiture. In 2022 and 2021, all deferrals in the U.S. Plan were funded. The compensation deferred in the U.S. Plan was $33.4 million and $34.9 million at December 31, 2022 and 2021, respectively. The assets of the U.S. Plan are included in Investments and the liabilities of the U.S. Plan are included in Retirement and pension plans in the Consolidated Balance Sheets as of December 31, 2022 and 2021. The Company has a Non-Employee Directors Voluntary Deferred Compensation Plan whereby non-employee members of the Company’s Board of Directors may elect to defer up to 100% of the cash component of their directors’ fees into several different investment vehicles. As of December 31, 2022, and 2021, the total amounts deferred under the plan were $1.0 million and $1.1 million, respectively, all of which were funded. The assets of the plan are included in Investments and the liabilities of the plan are included in Retirement and pension plans in the Consolidated Balance Sheets at December 31, 2022 and 2021. The U.S. and Non-Employee Directors Voluntary Deferred Compensation Plans consist primarily of marketable securities and mutual funds, all of which are valued using Level 1 inputs (See Note 7, Financial Instruments and Fair Value ).

Pension Plan and Life Insurance

Pension Plan and Life Insurance Contract	12 Months Ended
	Dec. 31, 2022
Retirement Benefits [Abstract]
Pension Plan and Life Insurance Contract	Pension Plan and Life Insurance Contract The Company maintains a pension plan for certain current and former employees in Germany. The pensions are individually fixed Euro amounts that vary depending on the function and the eligible years of service of the employee. 2022 2021 Benefit obligation at January 1, $ 19,594 $ 22,351 Interest cost 181 150 Actuarial loss (3,361) (11) Benefits paid (1,257) (1,400) Cumulative translation adjustment (1,206) (1,496) Benefit obligation at December 31, $ 13,951 $ 19,594 The benefit obligation amounts recognized in the Consolidated Balance Sheets are as follows: December 31, 2022 2021 Current liabilities $ 1,252 $ 1,333 Noncurrent liabilities 12,699 18,261 Total $ 13,951 $ 19,594 The components of and assumptions used to determine the net periodic benefit cost are as follows: December 31, 2022 2021 2020 Net period benefit cost: Interest cost $ 181 $ 150 $ 212 Amortization of net loss 195 211 140 Net periodic benefit cost $ 376 $ 361 $ 352 Weighted average assumptions Discount rate (1) 1.03 % 0.72 % 1.03 % Rate of compensation increase — % — % — % Assumptions to determine the Company’s benefit obligation are as follows: December 31, 2022 2021 2020 Discount rate (1) 4.09 % 1.03 % 0.72 % Rate of compensation increase — % — % — % Measurement Date 12/31/2022 12/31/2021 12/31/2020 (1) The discount rates are based on long-term bond indices adjusted to reflect the longer duration of the benefit obligation. The amounts in Accumulated other comprehensive income as of December 31, 2022 and 2021, that had not yet been recognized as components of net periodic benefit cost were $0.7 million and $4.5 million, respectively. As of December 31, 2022, an insignificant amount of the accumulated other comprehensive income is expected to be recognized as a component of net periodic benefit cost in 2023. The Company’s investment strategy is to support its pension obligations through reinsurance contracts. The BaFin—German Federal Financial Supervisory Authority—supervises the insurance companies and the reinsurance contracts. The BaFin requires each reinsurance contract to guarantee a fixed minimum return. The Company’s pension benefits are fully reinsured by group insurance contracts with ERGO Lebensversicherung AG, and the group insurance contracts are measured in accordance with BaFin guidelines (including mortality tables and discount rates) which are considered Level 2 inputs (See Note 7, Financial Instruments and Fair Value ). The fair value at December 31, 2022 and 2021, was $12.6 million and $14.0 million, respectively. Since the pension assets are not segregated in trust from the Company’s other assets, the pension assets are not shown as an offset against the pension liabilities in the Consolidated Balance Sheets. These assets are included in the Consolidated Balance Sheets at December 31, 2022 and 2021, as a component of Other current assets and Assets designated for retirement and pension plans . The benefits expected to be paid in each of the next five years, and in the aggregate for the five years thereafter are as follows: 2023 $ 1,252 2024 1,237 2025 1,216 2026 1,190 2027 1,160 2028 through 2032 5,167

Stock-Based Compensation

Stock-Based Compensation	12 Months Ended
	Dec. 31, 2022
Share-Based Payment Arrangement [Abstract]
Share-based Payment Arrangement	Stock-Based Compensation The Company's Third Amended and Restated 2012 Heidrick & Struggles GlobalShare Program (the "Third A&R Program") provides for grants of stock options, stock appreciation rights, restricted stock units, performance stock units, phantom stock units and other stock-based compensation awards that are valued based upon the grant date fair value of awards. These awards may be granted to directors, selected employees and independent contractors. As of December 31, 2022, 3,769,836 awards have been issued under the Third A&R Program, including 758,632 forfeited awards, and 338,796 shares remain available for future awards. The Third A&R Program provides that no awards can be granted after May 28, 2028. The Company measures its stock-based compensation costs based on the grant date fair value of the awards and recognizes these costs in the financial statements over the requisite service period. The Company analyzes historical data of forfeited awards to develop an estimated forfeiture rate that is applied to the Company's stock-based compensation expense; however, all stock-based compensation expense is adjusted to reflect actual vestings and forfeitures. A summary of information with respect to stock-based compensation is as follows: December 31, 2022 2021 2020 Salaries and employee benefits (1) $ 14,651 $ 20,081 $ 12,968 General and administrative expenses 810 345 460 Income tax benefit related to stock-based compensation included in net income 4,263 5,539 3,571 (1) Includes $1.2 million of income and $7.8 million and $3.2 million of expense related to cash settled restricted stock units for the years ended December 31, 2022, 2021 and 2020, respectively. Restricted Stock Units Restricted stock units are subject to ratable vesting over a three-year or four-year period dependent upon the terms of the individual grant. Compensation expense related to service-based restricted stock units is recognized on a straight-line basis over the vesting period. Restricted stock unit activity for the years ended December 31, 2022 and 2021 is as follows: Number of Weighted- Outstanding on December 31, 2020 707,864 $ 28.35 Granted 257,070 38.89 Vested and converted to common stock (218,950) 30.65 Forfeited (18,333) 30.80 Outstanding on December 31, 2021 727,651 31.32 Granted 287,954 34.05 Vested and converted to common stock (273,565) 32.29 Forfeited (13,755) 34.63 Outstanding on December 31, 2022 728,285 $ 31.97 As of December 31, 2022, there was $6.0 million of pre-tax unrecognized compensation expense related to unvested restricted stock units, which is expected to be recognized over a weighted average of 2.3 years. Performance Stock Units The Company grants performance stock units to certain of its senior executives. The performance stock units are generally subject to a cliff vesting at the end of a three-year period. The vesting will vary between 0% - 200% based on the attainment of certain performance and market conditions over the three-year vesting period. Half of the award is based on the achievement of operating margin thresholds and half of the award is based on the Company's total shareholder return, relative to a peer group. The fair value of the awards subject to total shareholder return metrics is determined using the Monte Carlo simulation model. A Monte Carlo simulation model uses stock price volatility and other variables to estimate the probability of satisfying the performance conditions and the resulting fair value of the award. The performance stock units are expensed on a straight-line basis over the three-year vesting period. Performance stock unit activity for the years ended December 31, 2022 and 2021 is as follows: Number of Weighted- Outstanding on December 31, 2020 234,934 $ 35.09 Granted 106,357 42.07 Vested and converted to common stock (90,284) 30.60 Forfeited (18,150) 36.83 Outstanding on December 31, 2021 232,857 39.88 Granted 97,379 49.59 Vested and converted to common stock (69,784) 52.91 Forfeited — — Outstanding on December 31, 2022 260,452 $ 40.02 As of December 31, 2022, there was $5.3 million of pre-tax unrecognized compensation expense related to unvested performance stock units, which is expected to be recognized over a weighted average of 1.7 years. Phantom Stock Units Phantom stock units are grants of phantom stock with respect to shares of the Company's common stock that are settled in cash and are subject to various restrictions, including restrictions on transferability, vesting and forfeiture provisions. Shares of phantom stock that do not vest for any reason will be forfeited by the recipient and will revert to the Company. Phantom stock units are subject to vesting over a period of four years and certain other conditions, including continued service to the Company. As a result of the cash-settlement feature of the awards, the Company classifies the awards as liability awards, which are measured at fair value at each reporting date and the vested portion of the award is recognized as a liability to the extent that the service condition is deemed probable. The fair value of the phantom stock awards on the balance sheet date was determined using the closing share price of the Company's common stock on that date. The Company recorded phantom stock-based compensation income of $1.2 million and expense of $7.8 million and $3.2 million for the years ended December 31, 2022, 2021 and 2020, respectively. Phantom stock unit activity for the years ended December 31, 2022 and 2021 is as follows: Number of Outstanding on December 31, 2020 351,634 Granted 63,575 Vested (61,539) Forfeited (4,807) Outstanding on December 31, 2021 348,863 Granted 95,675 Vested (119,333) Forfeited (4,050) Outstanding on December 31, 2022 321,155 As of December 31, 2022, there was $2.2 million of pre-tax unrecognized compensation expense related to unvested phantom stock units, which is expected to be recognized over a weighted average of 2.9 years.

Changes in Accumulated Other Co

Changes in Accumulated Other Comprehensive Income	12 Months Ended
	Dec. 31, 2022
Equity [Abstract]
Changes in Accumulated Other Comprehensive Income	Changes in Accumulated Other Comprehensive Income The changes in Accumulated other comprehensive income (“AOCI”) by component for the year ended December 31, 2022, are summarized below: Available- Foreign Pension AOCI Balance at December 31, 2021 $ — $ 4,294 $ (2,619) $ 1,675 Other comprehensive income (loss) before classification, net of tax (41) (8,457) 2,634 (5,864) Balance at December 31, 2022 $ (41) $ (4,163) $ 15 $ (4,189)

Restructuring

Restructuring	12 Months Ended
	Dec. 31, 2022
Restructuring and Related Activities [Abstract]
Restructuring and Related Activities Disclosure [Text Block]	Restructuring During the year ended December 31, 2020, the Company implemented a restructuring plan (the "2020 Plan") to optimize future growth and profitability. The primary components of the 2020 Plan included a workforce reduction, a reduction of the Company's real estate expenses and professional fees, and the elimination of certain deferred compensation programs. The Company continued to incur charges related to the 2020 Plan during the year ended December 31, 2021, which primarily related to finalizing a reduction in the Company's real estate footprint. The Company did not incur any charges under the 2020 Plan during the year ended December 31, 2022 and does not anticipate incurring any future charges under the 2020 Plan. Restructuring charges (reversals) for the year ended December 31, 2021 by type of charge (reversal) and operating segment are as follows: Executive Search Americas Europe Asia Pacific Heidrick Consulting Global Operations Support Total Employee related $ 20 $ (97) $ (124) $ (44) $ 62 $ (183) Office related 3,859 — — 399 (296) 3,962 Other 3 — — — 10 13 Total $ 3,882 $ (97) $ (124) $ 355 $ (224) $ 3,792 Restructuring charges (reversals) for the year ended December 31, 2020 by type of charge (reversal) and operating segment are as follows: Executive Search Americas Europe Asia Pacific Heidrick Consulting Global Operations Support Total Employee related $ 16,206 $ 8,353 $ 4,234 $ 2,633 $ 1,354 $ 32,780 Office related 14,242 226 374 1,953 2,115 18,910 Other 31 24 6 71 550 682 Total $ 30,479 $ 8,603 $ 4,614 $ 4,657 $ 4,019 $ 52,372 Restructuring charges incurred to date under the 2020 Plan, which are solely comprised of prior period charges, by type of charge and reportable segment are as follows: Executive Search Americas Europe Asia Pacific Heidrick Consulting Global Operations Support Total Employee related $ 16,226 $ 8,256 $ 4,110 $ 2,589 $ 1,416 $ 32,597 Office related 18,101 226 374 2,352 1,819 22,872 Other 34 24 6 71 560 695 Total $ 34,361 $ 8,506 $ 4,490 $ 5,012 $ 3,795 $ 56,164 As part of the Company's reduction in real estate expenses under the 2020 Plan, a lease component related to one of the Company's offices was abandoned. In September 2021, the Company entered into a termination and surrender agreement for this lease component. Under the terms of the agreement, the Company made a one-time payment of $11.7 million to release the Company from all remaining obligations under the lease. At the time of payment, the Company had accrued approximately $17.4 million of lease liabilities related to future payments under the remaining lease term. Upon making the one-time payment, the lease liabilities were relieved, resulting in a gain on termination of approximately $5.7 million, which is recorded in Restructuring charges in the Consolidated Statements of Comprehensive Income (Loss) for the year ended December 31, 2021. Changes in the restructuring accrual for the years ended December 31, 2022, 2021, and 2020 were as follows: Employee Related Office Related Other Total Accrual balance at December 31, 2019 3,245 — — 3,245 Restructuring charges 32,780 18,910 682 52,372 Cash payments (11,443) (138) (682) (12,263) Non-cash write-offs (1,633) (17,823) — (19,456) Other (173) — — (173) Exchange rate fluctuations (464) 4 — (460) Accrual balance at December 31, 2020 22,312 953 — 23,265 Restructuring charges (183) 3,962 13 3,792 Cash payments (13,702) (738) (13) (14,453) Non-cash write-offs 44 (4,190) — (4,146) Exchange rate fluctuations (77) 13 — (64) Accrual balance at December 31, 2021 8,394 — — 8,394 Cash payments (4,853) — — (4,853) Non-cash write-offs (34) — — (34) Exchange rate fluctuations (85) — — (85) Accrual balance at December 31, 2022 $ 3,422 $ — $ — $ 3,422 Restructuring accruals are recorded within current Accrued salaries and benefits in the Consolidated Balance Sheets as of December 31, 2022. Accruals associated with the elimination of certain deferred compensation programs of $4.9 million and $3.6 million are recorded within current and non-current Accrued salaries and benefits

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2022
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The sources of income (loss) before income taxes are as follows: December 31, 2022 2021 2020 United States $ 57,274 $ 68,122 $ 11,346 Foreign 57,962 37,907 (42,744) Income (loss) before income taxes $ 115,236 $ 106,029 $ (31,398) The provision for income taxes are as follows: December 31, 2022 2021 2020 Current Federal $ 13,405 $ 21,200 $ 4,469 State and local 6,748 9,341 1,948 Foreign 8,813 9,802 2,172 Current provision for income taxes 28,966 40,343 8,589 Deferred Federal 3,702 (3,373) (2,416) State and local 1,113 (1,825) (697) Foreign 1,969 (1,688) 833 Deferred provision (benefit) for income taxes 6,784 (6,886) (2,280) Total provision for income taxes $ 35,750 $ 33,457 $ 6,309 A reconciliation of the provision for income taxes to income taxes at the statutory U.S. federal income tax rate of 21% is as follows: December 31, 2022 2021 2020 Income tax provision (benefit) at the statutory U.S. federal rate $ 24,199 $ 22,266 $ (6,594) State income tax provision, net of federal tax benefit 5,475 4,994 735 Nondeductible expenses, net 4,036 2,833 6,950 Foreign taxes (includes rate differential and changes in foreign valuation allowance) 1,647 1,910 4,470 Establishment (release) of valuation allowance — (157) 566 Additional U.S. tax on foreign operations 436 242 115 Other, net (43) 1,369 67 Total provision for income taxes $ 35,750 $ 33,457 $ 6,309 The deferred tax assets and liabilities are attributable to the following components: December 31, 2022 2021 Deferred tax assets attributable to: Operating lease liability and accrued rent $ 16,693 $ 16,118 Foreign net operating loss carryforwards 14,528 15,555 Accrued compensation and employee benefits 20,776 25,844 Deferred compensation 17,994 21,289 Foreign tax credit carryforwards 5,522 5,382 Other accrued expenses 6,257 3,083 Deferred tax assets, before valuation allowance 81,770 87,271 Valuation allowance (20,724) (20,396) Deferred tax assets, after valuation allowance 61,046 66,875 Deferred tax liabilities attributable to: Operating lease, right-of-use assets 13,020 12,820 Goodwill 9,493 7,526 Depreciation on property and equipment 3,449 3,169 Other 1,592 1,310 Deferred tax liabilities 27,554 24,825 Net deferred tax assets $ 33,492 $ 42,050 The recognition of deferred tax assets is based on management’s belief that it is more likely than not that the tax benefits associated with temporary differences, net operating loss carryforwards and tax credits will be utilized. The Company assesses the recoverability of the deferred tax assets on an ongoing basis. In making this assessment, the Company considers all positive and negative evidence, and all potential sources of taxable income including scheduled reversals of deferred tax liabilities, tax-planning strategies, projected future taxable income and recent financial performance. Certain of the Company’s deferred tax liabilities, based on jurisdictional netting, of $0.5 million and $0.1 million are included in Other non-current liabilities on the Consolidated Balance Sheets at December 31, 2022 and 2021, respectively. The valuation allowance increased from $20.4 million at December 31, 2021 to $20.7 million at December 31, 2022. The valuation allowance at December 31, 2022 was related to foreign net operating loss carryforwards, foreign tax credit carryforwards, and certain foreign deferred tax assets. The Company intends to maintain these valuation allowances until sufficient evidence exists to support their reversal. At December 31, 2022, the Company had a net operating loss carryforward of $103.4 million related to its foreign tax filings. Of the $103.4 million net operating loss carryforward, $64.0 million is subject to a valuation allowance. Depending on the tax rules of the tax jurisdictions, the losses can be carried forward for periods ranging from five years to indefinitely. The Company also has a foreign tax credit carryforward of $5.5 million subject to a valuation allowance of $5.5 million. At December 31, 2021, the Company had a net operating loss carryforward of $111.0 million related to its foreign tax filings. Of the $111.0 million net operating loss carryforward, $64.7 million is subject to a valuation allowance. Depending on the tax rules of the tax jurisdictions, the losses can be carried forward for periods ranging from five years to indefinitely. The Company also had a foreign tax credit carryforward of $5.4 million subject to a valuation allowance of $5.4 million. As of December 31, 2022 and 2021, the Company does not have any unrecognized tax benefits, due to the settlement of all previous unrecognized tax benefits. A reconciliation of the beginning and ending balances of the total amounts of gross unrecognized tax benefits is as follows: December 31, 2022 2021 2020 Gross unrecognized tax benefits at January 1, $ — $ 416 $ 130 Gross increases for tax positions of prior years — 6 500 Gross decreases for tax positions of prior years — (14) (31) Settlements — (408) (183) Gross unrecognized tax benefits at December 31, $ — $ — $ 416 In many cases, the Company’s uncertain tax positions are related to tax years that remain subject to examination by the relevant taxable authorities. The statute of limitations varies by jurisdiction in which the Company operates. Years 2019 through 2021 are subject to examination by the federal and state taxing authorities. The years 2018 and prior are subject to examination in certain foreign and state jurisdictions. The Company is currently under audit by some jurisdictions. It is likely that the examination phase of several of these audits will conclude in the next twelve months. No significant increases or decreases in unrecognized tax benefits are expected to occur by December 31, 2023. Estimated interest and penalties related to the underpayment of income taxes are classified as a component of the provision for income taxes in the Consolidated Statements of Comprehensive Income (Loss). The Company has elected to account for Global Intangible Low-Taxed Income (“GILTI”) tax in the period in which it is incurred, and therefore has not provided any deferred tax impacts of GILTI in its consolidated financial statements for the year ended December 31, 2022.

Segment Information

Segment Information	12 Months Ended
	Dec. 31, 2022
Segment Reporting [Abstract]
Segment Information	Segment Information In April 2021, the Company acquired BTG, a market-leader in sourcing high-end, on-demand independent talent. As a result of the acquisition, the Company identified a new operating segment, On-Demand Talent. The Company now has five operating segments. The executive search business operates in the Americas, Europe (which includes Africa) and Asia Pacific (which includes the Middle East), and the Heidrick Consulting and On-Demand Talent businesses operate globally. For segment purposes, reimbursements of out-of-pocket expenses classified as revenue and other operating income are reported separately and, therefore, are not included in the results of each segment. The Company believes that analyzing trends in revenue before reimbursements (net revenue), analyzing operating expenses as a percentage of net revenue, and analyzing operating income (loss), more appropriately reflect its core operations. The revenue, operating income (loss), depreciation and amortization, and capital expenditures, by segment, are as follows: December 31, 2022 2021 2020 Revenue Executive Search Americas $ 612,881 $ 581,440 $ 361,416 Europe 176,275 170,312 124,243 Asia Pacific 112,766 117,008 79,511 Total Executive Search 901,922 868,760 565,170 On-Demand Talent 91,349 66,636 — Heidrick Consulting 80,193 67,605 56,445 Revenue before reimbursements 1,073,464 1,003,001 621,615 Reimbursements 10,122 5,473 7,755 Total revenue $ 1,083,586 $ 1,008,474 $ 629,370 Operating income (loss) Executive Search Americas (1) $ 164,225 $ 142,040 $ 62,806 Europe (2) 19,274 18,424 (22,827) Asia Pacific (3) 18,687 18,167 (6,724) Total Executive Search 202,186 178,631 33,255 On-Demand Talent (4) (3,361) (9,272) — Heidrick Consulting (5) (7,155) (16,162) (28,369) Total segments 191,670 153,197 4,886 Research and development (20,414) — — Global Operations Support (6) (58,990) (54,933) (40,415) Total operating income (loss) $ 112,266 $ 98,264 $ (35,529) Depreciation and amortization Executive Search Americas $ 3,498 $ 12,843 $ 20,937 Europe 1,451 1,802 2,270 Asia Pacific 1,126 1,399 1,837 Total Executive Search 6,075 16,044 25,044 On-Demand Talent 2,669 2,010 — Heidrick Consulting 878 1,045 953 Total segments 9,622 19,099 25,997 Research and development 524 — — Global Operations Support 457 461 659 Total depreciation and amortization $ 10,603 $ 19,560 $ 26,656 Capital expenditures Executive Search Americas $ 1,890 $ 4,487 $ 4,258 Europe 683 372 409 Asia Pacific 1,497 209 2,015 Total Executive Search 4,070 5,068 6,682 On-Demand Talent 732 — — Heidrick Consulting 128 174 116 Total segments 4,930 5,242 6,798 Research and development 4,878 — — Global Operations Support 1,326 998 524 Total capital expenditures $ 11,134 $ 6,240 $ 7,322 (1) Includes $3.9 million and $30.5 million of restructuring charges in 2021 and 2020, respectively. (2) Includes a $0.1 million restructuring reversal and $8.6 million of restructuring charges in 2021 and 2020, respectively, and $24.5 million of impairment charges in 2020. (3) Includes a $0.1 million restructuring reversal and $4.6 million of restructuring charges in 2021 and 2020, respectively, and $8.5 million of impairment charges in 2020. (4) Includes a $0.5 million fair value adjustment to reduce the earnout and an $11.4 million fair value adjustment to increase the earnout in 2022 and 2021, respectively. (5) Includes $0.4 million and $4.7 million of restructuring charges in 2021 and 2020, respectively. (6) Includes a $0.2 million restructuring reversal and $4.0 million of restructuring charges in 2021 and 2020, respectively. Identifiable assets, and goodwill and other intangible assets, net, by segment, are as follows: December 31, 2022 2021 Current assets Executive Search Americas $ 566,015 $ 459,077 Europe 82,935 123,865 Asia Pacific 104,445 99,510 Total Executive Search 753,395 682,452 On-Demand Talent 20,237 22,478 Heidrick Consulting 47,154 36,640 Total segments 820,786 741,570 Global Operations Support 3,033 3,818 Total allocated current assets 823,819 745,388 Unallocated non-current assets 207,125 213,717 Goodwill and other intangible assets, net Executive Search Americas 91,434 91,566 Europe 1,665 1,995 Asia Pacific 15 33 Total Executive Search 93,114 93,594 On-Demand Talent 51,580 54,099 Heidrick Consulting — — Total goodwill and other intangible assets, net 144,694 147,693 Total assets $ 1,175,638 $ 1,106,798 The only country to account for more than 10% of the Company's net revenue and total long-lived assets is the United States. Net revenue in the United States for the years ended December 31, 2022, 2021 and 2020 was $703.7 million, $650.9 million, and $377.8 million, respectively. Total long-lived assets in the United States as of December 31, 2022 and 2021 were $260.6 million and $257.9 million, respectively.

Guarantees

Guarantees	12 Months Ended
	Dec. 31, 2022
Guarantees [Abstract]
Guarantees	Guarantees The Company has utilized letters of credit to support certain obligations, primarily for office lease agreements and business license requirements for certain of its subsidiaries in Europe and Asia Pacific. The letters of credit were made to secure the respective agreements and are for the terms of the agreements, which extend through 2033. For each letter of credit issued, the Company would have use cash to fulfill the obligation if the subsidiary defaults on a lease payment. The maximum amount of undiscounted payments the Company would be required to make in the event of default on all outstanding letters of credit is approximately $4.6 million as of December 31, 2022. The Company has not accrued for these arrangements as no event of default exists or is expected to exist.

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2022
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Litigation The Company has contingent liabilities from various pending claims and litigation matters arising in the ordinary course of the Company’s business, some of which involve claims for damages that are substantial in amount. Some of these matters are covered by insurance. Based upon information currently available, the Company believes the ultimate resolution of such claims and litigation will not have a material adverse effect on its financial condition, results of operations or liquidity.

Subsequent Events

Subsequent Events	12 Months Ended
	Dec. 31, 2022
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events On February 1, 2023, the Company acquired Atreus Group GmbH ("Atreus"). Atreus is one of the leading providers of executive interim management in Germany. Total initial consideration is comprised of $33.5 million paid in the 2023 first quarter and an estimated subsequent payment, which the Company estimates to be between $9.0 million and $13.0 million, to be paid in 2023 upon the completion of Atreus' statutory audit for the year ended December 31, 2022, subject to customary working capital adjustments. The former owners of Atreus are also eligible to receive additional cash consideration, which the Company estimates to be between $30.0 million and $40.0 million on the acquisition date, based on the achievement of certain revenue and operating income milestones for the period from acquisition through 2025.On February 24, 2023, the Company entered into the Second Amendment (as amended, the “Second Amendment”) to the Credit Agreement by and among the Company, Bank of America, N.A., as administrative agent, and the lenders party thereto. The Second Amendment replaced the interest rate benchmark, from the London Interbank Offered Rate (“LIBOR”) to the Secured Overnight Financing Rate (“SOFR”). At the Company’s option, borrowings under the Second Amendment will bear interest at one-, three- or six-month Term SOFR, or an alternate base rate as set forth in the Second Amendment, in each case plus an applicable margin. Other than the foregoing, the material terms of the Credit Agreement, as amended by the First Amendment remain unchanged.

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2022
Accounting Policies [Abstract]
Cash and Cash Equivalents	Cash and Cash Equivalents The Company considers all highly liquid instruments with an original maturity of three months or less to be cash equivalents.
Marketable Securities, Policy	Marketable Securities The Company’s marketable securities consist of available-for-sale debt securities with original maturities exceeding three months.
Concentration of Risk	Concentration of Risk The Company is potentially exposed to concentrations of risk associated with its accounts receivable. However, this risk is limited due to the Company’s large number of clients and their dispersion across many different industries and geographies. At December 31, 2022 and 2021, the Company had no significant concentrations of risk.
Accounts Receivable	Accounts Receivable The Company’s accounts receivable consists of trade receivables. The Company’s expected credit loss allowance methodology for accounts receivable is developed using historical collection experience, current and future economic and market conditions, and a review of the current status of customers' trade accounts receivables. These factors may change over time, impacting the allowance level. See Note 4, Credit Losses .
Fair Value of Financial Instruments	Fair Value of Financial Instruments Cash equivalents are stated at cost, which approximates fair value. The carrying value for receivables from clients, accounts payable, deferred revenue and other accrued liabilities reasonably approximates fair value due to the nature of the financial instruments and the short-term nature of the items.
Property and Equipment	Property and Equipment Property and equipment are stated at cost. Depreciation is computed using the straight-line method over the estimated useful life of the asset or, for leasehold improvements, the shorter of the lease term or the estimated useful life of the asset, as follows: Office furniture, fixtures and equipment 5–10 years Computer equipment and software 3–7 years Leasehold improvements are depreciated over the lesser of the lease term or life of the asset improvement, which typically range from three to ten years. Depreciation is calculated for tax purposes using accelerated methods, where applicable.
Long-lived Assets	Other Intangible Assets and Long Lived Assets The Company reviews its other intangible assets and long-lived assets, including property and equipment and right-of-use assets, for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset group may not be recoverable. Recoverability of asset groups to be held and used is measured by a comparison of the carrying amount of an asset group to estimated undiscounted future cash flows expected to be generated by the asset group. If the carrying amount of an asset group exceeds its estimated future cash flows, an impairment charge, equal to the amount by which the carrying amount of the asset group exceeds the fair value of the asset group, is recognized.
Lessee, Leases	Leases The Company determines if an arrangement is a lease at inception. Operating leases are included in Operating Lease Right-of-Use Assets , Operating Lease Liabilities - Current and Operating Lease Liabilities - Non-Current in our Consolidated Balance Sheets. The Company does not have any leases that meet the finance lease criteria. Right-of-use assets represent the Company's right to use an underlying asset for the lease term and lease liabilities represent the Company's obligation to make lease payments arising from the lease. Operating lease right-of-use assets and liabilities are recognized on the commencement date based on the present value of lease payments over the lease term. As most of the Company's leases do not provide an implicit rate, an incremental borrowing rate based on the information available at the commencement date is used in determining the present value of lease payments. The operating lease right-of-use asset also includes any lease payments made in advance and any accrued rent expense balances. Lease terms may include options to extend or terminate the lease when it is reasonably certain that the option will be exercised. Lease expense for lease payments is recognized on a straight-line basis over the lease term. The Company has lease agreements with lease and non-lease components. For office leases, the Company accounts for the lease and non-lease components as a single lease component. For equipment leases, such as vehicles and office equipment, the Company accounts for the lease and non-lease components separately.
Investments	Investments The Company’s investments consist primarily of available-for-sale equity investments within the U.S. non-qualified deferred compensation plan (the “Plan”). Available-for-sale investments are reported at fair value with changes in unrealized gains (losses) and realized gains (losses) recorded as a non-operating expense in Other, net in the Consolidated Statements of Comprehensive Income (Loss).
Goodwill and Other Intangible Assets	Goodwill Goodwill represents the difference between the purchase price of acquired companies and the related fair value of the net assets acquired, which is accounted for by the acquisition method of accounting. The Company performs assessments of the carrying value of goodwill at least annually and whenever events occur or circumstances indicate that a carrying amount of goodwill may not be recoverable. These circumstances include a significant change in business climate, attrition of key personnel, changes in financial condition or results of operations, a prolonged decline in the Company’s stock price and market capitalization, competition, and other factors. The goodwill impairment test compares the fair value of a reporting unit to its carrying amount, including goodwill. The Company operates five reporting units: Americas, Europe (which includes Africa), Asia Pacific (which includes the Middle East), On-Demand Talent and Heidrick Consulting. The goodwill impairment test is completed by comparing the fair value of a reporting unit with its carrying amount. The fair value of each of the Company’s reporting units is determined using a discounted cash flow methodology. An impairment charge is recognized for the amount by which the carrying value of the reporting unit exceeds its fair value; however, the loss recognized is not to exceed the total amount of goodwill allocated to that reporting unit.
Restructuring Charges	Restructuring Charges The Company accounts for restructuring charges by recognizing a liability at fair value when the costs are incurred.
Revenue from Contract with Customer	Revenue Recognition See Note 3, Revenue .
Cost of Goods and Service	Cost of Services Cost of services consists of third-party contractor costs related to the delivery of various services in the Company's On-Demand Talent and Heidrick Consulting operating segments.
Research and Development Expense, Policy	Research and Development Research and development (“R&D”) consist of payroll, employee benefits, stock-based compensation, other employee expenses and third-party professional fees associated with the development of new technologies to enhance existing products and services and to expand the range of the Company's offerings. The benefits from our R&D efforts are intended to be utilized to develop and enhance new and existing services and products across our current offerings in Executive Search, Heidrick Consulting, On-Demand Talent and for products and services in new segments that we embark upon in the future from time to time.
Reimbursements	Reimbursements The Company incurs certain out-of-pocket expenses that are reimbursed by its clients, which are accounted for as revenue and expense in its Consolidated Statements of Comprehensive Income (Loss).
Salaries and Employee Benefits	Salaries and Benefits Salaries and benefits consist of compensation and benefits paid to consultants, executive officers, and administrative and support personnel, of which the most significant elements are salaries and annual performance-related bonuses. Other items in this category are expenses related to sign-on bonuses, forgivable employee loans and minimum guaranteed bonuses (often incurred in connection with the hiring of new consultants), restricted stock unit, phantom stock unit and performance stock unit amortization, payroll taxes, profit sharing and retirement benefits, and employee insurance benefits. Salaries and benefits are recognized on an accrual basis. Certain sign-on bonuses, retention awards, and minimum guaranteed compensation are capitalized and amortized in accordance with the terms of the respective agreements. Historically, a portion of the Company’s consultants’ and management cash bonuses were deferred and paid over a three-year vesting period. The portion of the bonus was approximately 15% depending on the employee’s level or position. The compensation expense related to the amounts being deferred was recognized on a graded vesting attribution method over the requisite service period. This service period began on January 1 of the respective fiscal year and continued through the deferral date, which coincided with the Company’s bonus payments in the first half of the following year and for an additional three-year vesting period. In 2020, the Company terminated the cash bonus deferral for consultants and, in 2021, terminated the cash bonus deferral for management. The Company now pays 100% of the cash bonuses earned by consultants and management in the first half of the following year. Consultant and management cash bonuses earned prior to 2020 and 2021, respectively, will continue to be paid under the terms of the cash bonus deferral program. The deferrals are recorded in Accrued salaries and benefits within both Current liabilities and Non-current liabilities
Income Taxes	Income Taxes Deferred tax assets and liabilities are determined based on the differences between the financial statement and tax basis of assets and liabilities, applying enacted statutory tax rates in effect for the year in which the tax differences are expected to reverse. Deferred tax assets are reduced by a valuation allowance when, in the opinion of management, it is more likely than not that some portion or all of the deferred tax assets will not be realized. Deferred tax assets and liabilities are adjusted for the effects of changes in tax laws and rates on the date of enactment.
Earnings per Common Share	Earnings per Common Share Basic earnings per common share is computed by dividing net income by weighted average common shares outstanding for the year. Diluted earnings per share reflect the potential dilution that could occur if securities or other contracts to issue common stock were exercised or converted. Common equivalent shares are excluded from the determination of diluted earnings per share in periods in which they have an anti-dilutive effect. The following table sets forth the computation of basic and diluted earnings (loss) per share: December 31, 2022 2021 2020 Net income (loss) $ 79,486 $ 72,572 $ (37,707) Weighted average shares outstanding: Basic 19,758 19,515 19,301 Effect of dilutive securities: Restricted stock units 644 587 — Performance stock units 216 194 — Diluted 20,618 20,296 19,301 Basic earnings (loss) per share $ 4.02 $ 3.72 $ (1.95) Diluted earnings (loss) per share $ 3.86 $ 3.58 $ (1.95) Weighted average restricted stock units and performance stock units outstanding that could be converted into approximately 472,000 and 120,000 common shares, respectively, for the year ended December 31, 2020, were not included in the computation of diluted earnings per share because the effects would be anti-dilutive.
Translation of Foreign Currencies	Translation of Foreign Currencies The Company generally designates the local currency for all its subsidiaries as the functional currency. The Company translates the assets and liabilities of its subsidiaries into U.S. dollars at the current rate of exchange prevailing at the balance sheet date. Revenue and expenses are translated at a monthly average exchange rate for the period. Translation adjustments are reported as a component of Accumulated other comprehensive income .
Cash and Cash Equivalents, Restricted Cash and Cash Equivalents, Policy [Policy Text Block]	Restricted Cash Periodically, the Company is party to agreements with terms that require the Company to restrict cash through the termination dates of the agreements. Current and non-current restricted cash is included in Other current assets and Other non-current assets , respectively, in the Consolidated Balance Sheets. The following table provides a reconciliation of the cash and cash equivalents between the Consolidated Balance Sheets and the Consolidated Statement of Cash Flows as of December 31, 2022, 2021 and 2020: December 31, 2022 2021 2020 Cash and cash equivalents $ 355,447 $ 545,225 $ 316,473 Restricted cash included within other non-current assets 42 34 16 Total cash, cash equivalents and restricted cash $ 355,489 $ 545,259 $ 316,489
Recently Issued Financial Accounting Standards	Recently Issued Financial Accounting Standards In March 2020, the FASB issued ASU No. 2020-04, Facilitation of the Effects of Reference Rate Reform on Financial Reporting. The guidance is intended to provide temporary optional expedients and exceptions to the guidance on contract modifications and hedge accounting to ease the financial reporting burdens related to the expected market transition from the London Interbank Offered Rate (LIBOR) and other interbank offered rates to alternative reference rates. This guidance is effective March 12, 2020, and the Company may elect to apply the amendments prospectively through December 31, 2024. The Company is currently evaluating the impact of this accounting guidance. The adoption of this guidance is not anticipated to have a material impact on the consolidated financial statements.

Summary of Significant Accoun_3

Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2022
Accounting Policies [Abstract]
Summary of Estimated Useful Life of Property and Equipment	Property and Equipment Property and equipment are stated at cost. Depreciation is computed using the straight-line method over the estimated useful life of the asset or, for leasehold improvements, the shorter of the lease term or the estimated useful life of the asset, as follows: Office furniture, fixtures and equipment 5–10 years Computer equipment and software 3–7 years Leasehold improvements are depreciated over the lesser of the lease term or life of the asset improvement, which typically range from three to ten years. Depreciation is calculated for tax purposes using accelerated methods, where applicable.
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]	The following table sets forth the computation of basic and diluted earnings (loss) per share: December 31, 2022 2021 2020 Net income (loss) $ 79,486 $ 72,572 $ (37,707) Weighted average shares outstanding: Basic 19,758 19,515 19,301 Effect of dilutive securities: Restricted stock units 644 587 — Performance stock units 216 194 — Diluted 20,618 20,296 19,301 Basic earnings (loss) per share $ 4.02 $ 3.72 $ (1.95) Diluted earnings (loss) per share $ 3.86 $ 3.58 $ (1.95)
Schedule of Cash and Cash Equivalents	The following table provides a reconciliation of the cash and cash equivalents between the Consolidated Balance Sheets and the Consolidated Statement of Cash Flows as of December 31, 2022, 2021 and 2020: December 31, 2022 2021 2020 Cash and cash equivalents $ 355,447 $ 545,225 $ 316,473 Restricted cash included within other non-current assets 42 34 16 Total cash, cash equivalents and restricted cash $ 355,489 $ 545,259 $ 316,489

Revenue (Tables)

Revenue (Tables)	12 Months Ended
	Dec. 31, 2022
Revenue from Contract with Customer [Abstract]
Contract with Customer, Contract Asset, Contract Liability, and Receivable	The following table outlines the changes in our contract asset and liability balances for the years ended: December 31, 2022 2021 Change Contract assets Unbilled receivables, net $ 13,940 $ 17,947 $ (4,007) Contract assets 21,348 18,995 2,353 Total contract assets 35,288 36,942 (1,654) Contract liabilities Deferred revenue $ 43,057 $ 51,404 $ (8,347)

Credit Losses (Tables)

Credit Losses (Tables)	12 Months Ended
	Dec. 31, 2022
Credit Loss [Abstract]
Accounts Receivable, Allowance for Credit Loss	The activity in the allowance for credit losses on the Company's trade receivables is as follows: December 31, 2022 2021 2020 Balance at January 1, $ 5,666 $ 6,557 $ 5,140 Provision for credit losses 7,938 4,991 6,696 Write-offs (6,830) (5,730) (5,418) Foreign currency translation (131) (152) 139 Balance at December 31, $ 6,643 $ 5,666 $ 6,557
Debt Securities, Available-for-sale	The fair value and unrealized losses on available for sale debt securities, aggregated by investment category and the length of time the security has been in an unrealized loss position, are as follows: Less Than 12 Months Balance Sheet Classification Balance at December 31, 2022 Fair Value Unrealized Loss Cash and Cash Equivalents Marketable Securities U.S. Treasury securities $ 194,056 $ 56 $ 11,918 $ 182,138

Property and Equipment, net (Ta

Property and Equipment, net (Tables)	12 Months Ended
	Dec. 31, 2022
Property, Plant and Equipment [Abstract]
Components of Company's Property and Equipment	The components of the Company’s property and equipment are as follows: December 31, 2022 2021 Leasehold improvements $ 40,829 $ 42,252 Office furniture, fixtures and equipment 14,322 14,933 Computer equipment and software 30,085 24,293 Property and equipment, gross 85,236 81,478 Accumulated depreciation (55,029) (54,393) Property and equipment, net $ 30,207 $ 27,085

Leases (Tables)

Leases (Tables)	12 Months Ended
	Dec. 31, 2022
Leases [Abstract]
Lease, Cost	Lease cost components included within General and Administrative Expenses in our Consolidated Statements of Comprehensive Income (Loss) for the year ended December 31, were as follows: December 31, 2022 2021 Operating lease cost $ 17,408 $ 18,912 Variable lease cost 6,116 4,949 Total lease cost $ 23,524 $ 23,861
Schedule of Cash Flow Information Related to Leases	Supplemental cash flow information related to the Company's operating leases for the year ended December 31, is as follows: December 31, 2022 2021 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 18,865 $ 40,473 Right-of-use assets obtained in exchange for lease obligations: Operating leases $ 18,055 $ 11,397
Schedule of Weighted Average Information Related to Leases	The weighted average remaining lease term and weighted average discount rate for our operating leases as of December 31, is as follows: December 31, 2022 2021 Weighted Average Remaining Lease Term Operating leases 6.3 years 6.4 years Weighted Average Discount Rate Operating leases 3.48 % 3.22 %
Lessee, Operating Lease, Liability, Maturity	The future maturities of the Company's operating lease liabilities for the years ended December 31, is as follows: Operating Lease Maturity 2023 $ 18,914 2024 19,521 2025 11,982 2026 10,491 2027 7,886 Thereafter 23,799 Total lease payments 92,593 Less: Interest (9,740) Present value of lease liabilities $ 82,853

Financial Instruments and Fai_2

Financial Instruments and Fair Value (Tables)	12 Months Ended
	Dec. 31, 2022
Fair Value Disclosures [Abstract]
Unrealized Gain (Loss) on Investments	The Company's cash, cash equivalents, and marketable securities by significant investment category are as follows: Amortized Cost Unrealized Gains Unrealized Losses Fair Value Cash and Cash Equivalents Marketable Securities Balance at December 31, 2022 Cash $ 247,198 $ — Level 1 (1) : Money market funds 62,338 U.S. Treasury securities 312,121 15 (56) 312,080 45,911 266,169 Total Level 1 312,121 15 (56) 312,080 108,249 266,169 Total $ 312,121 $ 15 $ (56) $ 312,080 $ 355,447 $ 266,169 Cash and Cash Equivalents Balance at December 31, 2021 Cash $ 265,233 Level 1 (1) : Money market funds 80,798 U.S. Treasury securities 199,194 Total Level 1 279,992 Total $ 545,225 (1) Level 1 – Quoted prices in active markets for identical assets and liabilities.
Fair Value, Separate Account Investment	The following tables provide a summary of the fair value measurements for each major category of investments, assets designated for retirement and pension plans and associated liabilities measured at fair value on a recurring basis: Balance Sheet Classification Fair Value Other Current Assets Assets Designated for Retirement and Pension Plans Investments Other Current Liabilities Retirement and Pension Plans Balance at December 31, 2022 Measured on a recurring basis: Level 1 (1) : U.S. non-qualified deferred compensation plan $ 34,354 $ — $ — $ 34,354 $ — $ — Level 2 (2) : Retirement and pension plan assets 12,584 1,252 11,332 — — — Pension benefit obligation (13,951) — — — (1,252) (12,699) Total Level 2 (1,367) 1,252 11,332 — (1,252) (12,699) Total $ 32,987 $ 1,252 $ 11,332 $ 34,354 $ (1,252) $ (12,699) Balance Sheet Classification Fair Value Other Current Assets Assets Designated for Retirement and Pension Plans Investments Other Current Liabilities Retirement and Pension Plans Balance at December 31, 2021 Measured on a recurring basis: Level 1 (1) : U.S. non-qualified deferred compensation plan $ 36,051 $ — $ — $ 36,051 $ — $ — Level 2 (2) : Retirement and pension plan assets 14,048 1,333 12,715 — — — Pension benefit obligation (19,594) — — — (1,333) (18,261) Total Level 2 (5,546) 1,333 12,715 — (1,333) (18,261) Total $ 30,505 $ 1,333 $ 12,715 $ 36,051 $ (1,333) $ (18,261) (1) Level 1 – Quoted prices in active markets for identical assets and liabilities. (2) Level 2 – Quoted prices in active markets for similar assets and liabilities, or other inputs that are observable for the asset or liability, either directly or indirectly, for substantially the full term of the financial instrument.
Reconciliation of Beginning and Ending Balance of Level 3 Assets and Liabilities	The following table provides a reconciliation of the beginning and ending balance of Level 3 liabilities for the year ended December 31, 2022: Earnout Contingent Compensation Balance at December 31, 2021 $ (35,654) $ (4,141) Earnout accretion (820) — Compensation expense — (3,885) Fair value adjustment 464 — Foreign currency translation — (166) Balance at December 31, 2022 $ (36,010) $ (8,192)

Goodwill and Other Intangible_2

Goodwill and Other Intangible Assets (Tables)	12 Months Ended
	Dec. 31, 2022
Goodwill and Intangible Assets Disclosure [Abstract]
Identifiable Assets, Goodwill and Other Intangible Assets, Net, by Segment	The Company's goodwill by segment (for the segments that had recorded goodwill) is as follows: December 31, 2022 December 31, 2021 Executive Search Americas $ 91,383 $ 91,463 Europe 1,449 1,532 Total Executive Search 92,832 92,995 On-Demand Talent 45,529 45,529 Total goodwill $ 138,361 $ 138,524 Identifiable assets, and goodwill and other intangible assets, net, by segment, are as follows: December 31, 2022 2021 Current assets Executive Search Americas $ 566,015 $ 459,077 Europe 82,935 123,865 Asia Pacific 104,445 99,510 Total Executive Search 753,395 682,452 On-Demand Talent 20,237 22,478 Heidrick Consulting 47,154 36,640 Total segments 820,786 741,570 Global Operations Support 3,033 3,818 Total allocated current assets 823,819 745,388 Unallocated non-current assets 207,125 213,717 Goodwill and other intangible assets, net Executive Search Americas 91,434 91,566 Europe 1,665 1,995 Asia Pacific 15 33 Total Executive Search 93,114 93,594 On-Demand Talent 51,580 54,099 Heidrick Consulting — — Total goodwill and other intangible assets, net 144,694 147,693 Total assets $ 1,175,638 $ 1,106,798
Changes in Carrying Amount of Goodwill by Segment	Changes in the carrying amount of goodwill by segment for the years ended December 31, 2022, 2021, and 2020 were as follows: Executive Search Americas Europe Asia Pacific On-Demand Talent Total Goodwill $ 92,497 $ 25,579 $ 8,755 $ — $ 126,831 Accumulated impairment losses — — — — — Balance at December 31, 2019 92,497 25,579 8,755 — 126,831 Impairment — (24,475) (8,495) — (32,970) Foreign currency translation (854) (1,104) (260) — (2,218) Balance at December 31, 2020 91,643 — — — 91,643 BTG acquisition — — — 45,529 45,529 Finland acquisition — 1,532 — — 1,532 Foreign currency translation (180) — — — (180) Balance at December 31, 2021 91,463 1,532 — 45,529 138,524 Foreign currency translation (80) (83) — — (163) Goodwill 91,383 25,924 8,495 45,529 171,331 Accumulated impairment losses — (24,475) (8,495) — (32,970) Balance at December 31, 2022 $ 91,383 $ 1,449 $ — $ 45,529 $ 138,361
Schedule of Indefinite-Lived Intangible Assets	The Company’s other intangible assets, net by segment (for the segments that had recorded intangible assets), are as follows: December 31, 2022 December 31, 2021 Executive Search Americas $ 51 $ 103 Europe 216 463 Asia Pacific 15 33 Total Executive Search 282 599 On-Demand Talent 6,051 8,570 Total Other Intangible Assets, Net $ 6,333 $ 9,169
Schedule of Acquired Finite-Lived Intangible Assets by Major Class	The carrying amount of amortizable intangible assets and the related accumulated amortization were as follows: December 31, 2022 December 31, 2021 Weighted Gross Carrying Amount Accumulated Amortization Net Gross Carrying Amount Accumulated Amortization Net Carrying Amount Client relationships 10.7 $ 10,720 $ (6,164) $ 4,556 $ 22,127 $ (16,495) $ 5,632 Trade name 3.1 2,406 (1,925) $ 481 2,441 (1,237) 1,204 Software 3.0 3,110 (1,814) 1,296 3,110 (777) 2,333 Total intangible assets 8.6 $ 16,236 $ (9,903) $ 6,333 $ 27,678 $ (18,509) $ 9,169
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]	The Company's estimated future amortization expense related to intangible assets as of December 31, 2022 for the years ended December 31, is as follows: 2023 2,723 2024 1,151 2025 762 2026 527 2027 384 Thereafter 786 Total 6,333

Other Current Assets (Tables)

Other Current Assets (Tables)	12 Months Ended
	Dec. 31, 2022
Other Liabilities Disclosure [Abstract]
Schedule of Other Current Assets	The components of other current assets are as follows: December 31, 2022 December 31, 2021 Contract assets $ 35,288 $ 36,942 Other 5,434 4,507 Total other current assets $ 40,722 $ 41,449
Other Current Liabilities [Table Text Block]	The components of other current liabilities are as follows: December 31, December 31, Earnout liability $ 36,010 $ — Other 20,006 24,554 Total other current liabilities $ 56,016 $ 24,554

Pension Plan and Life Insuran_2

Pension Plan and Life Insurance Contract (Tables)	12 Months Ended
	Dec. 31, 2022
Retirement Benefits [Abstract]
Schedule of Changes in Projected Benefit Obligations	2022 2021 Benefit obligation at January 1, $ 19,594 $ 22,351 Interest cost 181 150 Actuarial loss (3,361) (11) Benefits paid (1,257) (1,400) Cumulative translation adjustment (1,206) (1,496) Benefit obligation at December 31, $ 13,951 $ 19,594
Schedule of Amounts Recognized in Balance Sheet	The benefit obligation amounts recognized in the Consolidated Balance Sheets are as follows: December 31, 2022 2021 Current liabilities $ 1,252 $ 1,333 Noncurrent liabilities 12,699 18,261 Total $ 13,951 $ 19,594
Schedule of Net Benefit Costs	The components of and assumptions used to determine the net periodic benefit cost are as follows: December 31, 2022 2021 2020 Net period benefit cost: Interest cost $ 181 $ 150 $ 212 Amortization of net loss 195 211 140 Net periodic benefit cost $ 376 $ 361 $ 352 Weighted average assumptions Discount rate (1) 1.03 % 0.72 % 1.03 % Rate of compensation increase — % — % — %
Schedule of Assumptions Used	Assumptions to determine the Company’s benefit obligation are as follows: December 31, 2022 2021 2020 Discount rate (1) 4.09 % 1.03 % 0.72 % Rate of compensation increase — % — % — % Measurement Date 12/31/2022 12/31/2021 12/31/2020
Schedule of Expected Benefit Payments	The benefits expected to be paid in each of the next five years, and in the aggregate for the five years thereafter are as follows: 2023 $ 1,252 2024 1,237 2025 1,216 2026 1,190 2027 1,160 2028 through 2032 5,167

Stock-Based Compensation - Phan

Stock-Based Compensation - Phantom Stock Units Award Activity (Tables)	12 Months Ended
	Dec. 31, 2022
Share-Based Payment Arrangement [Abstract]
Summary of Information with Respect to Stock-based Compensation	A summary of information with respect to stock-based compensation is as follows: December 31, 2022 2021 2020 Salaries and employee benefits (1) $ 14,651 $ 20,081 $ 12,968 General and administrative expenses 810 345 460 Income tax benefit related to stock-based compensation included in net income 4,263 5,539 3,571
Restricted Stock Unit Activity	Restricted stock unit activity for the years ended December 31, 2022 and 2021 is as follows: Number of Weighted- Outstanding on December 31, 2020 707,864 $ 28.35 Granted 257,070 38.89 Vested and converted to common stock (218,950) 30.65 Forfeited (18,333) 30.80 Outstanding on December 31, 2021 727,651 31.32 Granted 287,954 34.05 Vested and converted to common stock (273,565) 32.29 Forfeited (13,755) 34.63 Outstanding on December 31, 2022 728,285 $ 31.97
Performance Stock Unit Activity	Performance stock unit activity for the years ended December 31, 2022 and 2021 is as follows: Number of Weighted- Outstanding on December 31, 2020 234,934 $ 35.09 Granted 106,357 42.07 Vested and converted to common stock (90,284) 30.60 Forfeited (18,150) 36.83 Outstanding on December 31, 2021 232,857 39.88 Granted 97,379 49.59 Vested and converted to common stock (69,784) 52.91 Forfeited — — Outstanding on December 31, 2022 260,452 $ 40.02
Schedule of Share-based Compensation, Phantom Stock Units Award Activity	Phantom stock unit activity for the years ended December 31, 2022 and 2021 is as follows: Number of Outstanding on December 31, 2020 351,634 Granted 63,575 Vested (61,539) Forfeited (4,807) Outstanding on December 31, 2021 348,863 Granted 95,675 Vested (119,333) Forfeited (4,050) Outstanding on December 31, 2022 321,155

Changes in Accumulated Other _2

Changes in Accumulated Other Comprehensive Income (Tables)	12 Months Ended
	Dec. 31, 2022
Equity [Abstract]
Changes in Accumulated Other Comprehensive Income ("AOCI") by Component	The changes in Accumulated other comprehensive income (“AOCI”) by component for the year ended December 31, 2022, are summarized below: Available- Foreign Pension AOCI Balance at December 31, 2021 $ — $ 4,294 $ (2,619) $ 1,675 Other comprehensive income (loss) before classification, net of tax (41) (8,457) 2,634 (5,864) Balance at December 31, 2022 $ (41) $ (4,163) $ 15 $ (4,189)

Restructuring (Tables)

Restructuring (Tables)	12 Months Ended
	Dec. 31, 2022
Restructuring and Related Activities [Abstract]
Schedule of Restructuring Charges by Segment	Restructuring charges (reversals) for the year ended December 31, 2021 by type of charge (reversal) and operating segment are as follows: Executive Search Americas Europe Asia Pacific Heidrick Consulting Global Operations Support Total Employee related $ 20 $ (97) $ (124) $ (44) $ 62 $ (183) Office related 3,859 — — 399 (296) 3,962 Other 3 — — — 10 13 Total $ 3,882 $ (97) $ (124) $ 355 $ (224) $ 3,792 Restructuring charges (reversals) for the year ended December 31, 2020 by type of charge (reversal) and operating segment are as follows: Executive Search Americas Europe Asia Pacific Heidrick Consulting Global Operations Support Total Employee related $ 16,206 $ 8,353 $ 4,234 $ 2,633 $ 1,354 $ 32,780 Office related 14,242 226 374 1,953 2,115 18,910 Other 31 24 6 71 550 682 Total $ 30,479 $ 8,603 $ 4,614 $ 4,657 $ 4,019 $ 52,372 Restructuring charges incurred to date under the 2020 Plan, which are solely comprised of prior period charges, by type of charge and reportable segment are as follows: Executive Search Americas Europe Asia Pacific Heidrick Consulting Global Operations Support Total Employee related $ 16,226 $ 8,256 $ 4,110 $ 2,589 $ 1,416 $ 32,597 Office related 18,101 226 374 2,352 1,819 22,872 Other 34 24 6 71 560 695 Total $ 34,361 $ 8,506 $ 4,490 $ 5,012 $ 3,795 $ 56,164
Restructuring and Related Costs	Changes in the restructuring accrual for the years ended December 31, 2022, 2021, and 2020 were as follows: Employee Related Office Related Other Total Accrual balance at December 31, 2019 3,245 — — 3,245 Restructuring charges 32,780 18,910 682 52,372 Cash payments (11,443) (138) (682) (12,263) Non-cash write-offs (1,633) (17,823) — (19,456) Other (173) — — (173) Exchange rate fluctuations (464) 4 — (460) Accrual balance at December 31, 2020 22,312 953 — 23,265 Restructuring charges (183) 3,962 13 3,792 Cash payments (13,702) (738) (13) (14,453) Non-cash write-offs 44 (4,190) — (4,146) Exchange rate fluctuations (77) 13 — (64) Accrual balance at December 31, 2021 8,394 — — 8,394 Cash payments (4,853) — — (4,853) Non-cash write-offs (34) — — (34) Exchange rate fluctuations (85) — — (85) Accrual balance at December 31, 2022 $ 3,422 $ — $ — $ 3,422

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2022
Income Tax Disclosure [Abstract]
Sources of Income (Loss) before Income Taxes	The sources of income (loss) before income taxes are as follows: December 31, 2022 2021 2020 United States $ 57,274 $ 68,122 $ 11,346 Foreign 57,962 37,907 (42,744) Income (loss) before income taxes $ 115,236 $ 106,029 $ (31,398)
Provision for (Benefit from) Income Taxes	The provision for income taxes are as follows: December 31, 2022 2021 2020 Current Federal $ 13,405 $ 21,200 $ 4,469 State and local 6,748 9,341 1,948 Foreign 8,813 9,802 2,172 Current provision for income taxes 28,966 40,343 8,589 Deferred Federal 3,702 (3,373) (2,416) State and local 1,113 (1,825) (697) Foreign 1,969 (1,688) 833 Deferred provision (benefit) for income taxes 6,784 (6,886) (2,280) Total provision for income taxes $ 35,750 $ 33,457 $ 6,309
Reconciliation of Provision for (Benefit from) Income Taxes	A reconciliation of the provision for income taxes to income taxes at the statutory U.S. federal income tax rate of 21% is as follows: December 31, 2022 2021 2020 Income tax provision (benefit) at the statutory U.S. federal rate $ 24,199 $ 22,266 $ (6,594) State income tax provision, net of federal tax benefit 5,475 4,994 735 Nondeductible expenses, net 4,036 2,833 6,950 Foreign taxes (includes rate differential and changes in foreign valuation allowance) 1,647 1,910 4,470 Establishment (release) of valuation allowance — (157) 566 Additional U.S. tax on foreign operations 436 242 115 Other, net (43) 1,369 67 Total provision for income taxes $ 35,750 $ 33,457 $ 6,309
Summary of Deferred Tax Assets and Liabilities	The deferred tax assets and liabilities are attributable to the following components: December 31, 2022 2021 Deferred tax assets attributable to: Operating lease liability and accrued rent $ 16,693 $ 16,118 Foreign net operating loss carryforwards 14,528 15,555 Accrued compensation and employee benefits 20,776 25,844 Deferred compensation 17,994 21,289 Foreign tax credit carryforwards 5,522 5,382 Other accrued expenses 6,257 3,083 Deferred tax assets, before valuation allowance 81,770 87,271 Valuation allowance (20,724) (20,396) Deferred tax assets, after valuation allowance 61,046 66,875 Deferred tax liabilities attributable to: Operating lease, right-of-use assets 13,020 12,820 Goodwill 9,493 7,526 Depreciation on property and equipment 3,449 3,169 Other 1,592 1,310 Deferred tax liabilities 27,554 24,825 Net deferred tax assets $ 33,492 $ 42,050
Reconciliation of Amounts of Gross Unrecognized Tax Benefits	A reconciliation of the beginning and ending balances of the total amounts of gross unrecognized tax benefits is as follows: December 31, 2022 2021 2020 Gross unrecognized tax benefits at January 1, $ — $ 416 $ 130 Gross increases for tax positions of prior years — 6 500 Gross decreases for tax positions of prior years — (14) (31) Settlements — (408) (183) Gross unrecognized tax benefits at December 31, $ — $ — $ 416

Segment Information (Tables)

Segment Information (Tables)	12 Months Ended
	Dec. 31, 2022
Segment Reporting [Abstract]
Schedule of Segment Reporting Information, by Segment	The revenue, operating income (loss), depreciation and amortization, and capital expenditures, by segment, are as follows: December 31, 2022 2021 2020 Revenue Executive Search Americas $ 612,881 $ 581,440 $ 361,416 Europe 176,275 170,312 124,243 Asia Pacific 112,766 117,008 79,511 Total Executive Search 901,922 868,760 565,170 On-Demand Talent 91,349 66,636 — Heidrick Consulting 80,193 67,605 56,445 Revenue before reimbursements 1,073,464 1,003,001 621,615 Reimbursements 10,122 5,473 7,755 Total revenue $ 1,083,586 $ 1,008,474 $ 629,370 Operating income (loss) Executive Search Americas (1) $ 164,225 $ 142,040 $ 62,806 Europe (2) 19,274 18,424 (22,827) Asia Pacific (3) 18,687 18,167 (6,724) Total Executive Search 202,186 178,631 33,255 On-Demand Talent (4) (3,361) (9,272) — Heidrick Consulting (5) (7,155) (16,162) (28,369) Total segments 191,670 153,197 4,886 Research and development (20,414) — — Global Operations Support (6) (58,990) (54,933) (40,415) Total operating income (loss) $ 112,266 $ 98,264 $ (35,529) Depreciation and amortization Executive Search Americas $ 3,498 $ 12,843 $ 20,937 Europe 1,451 1,802 2,270 Asia Pacific 1,126 1,399 1,837 Total Executive Search 6,075 16,044 25,044 On-Demand Talent 2,669 2,010 — Heidrick Consulting 878 1,045 953 Total segments 9,622 19,099 25,997 Research and development 524 — — Global Operations Support 457 461 659 Total depreciation and amortization $ 10,603 $ 19,560 $ 26,656 Capital expenditures Executive Search Americas $ 1,890 $ 4,487 $ 4,258 Europe 683 372 409 Asia Pacific 1,497 209 2,015 Total Executive Search 4,070 5,068 6,682 On-Demand Talent 732 — — Heidrick Consulting 128 174 116 Total segments 4,930 5,242 6,798 Research and development 4,878 — — Global Operations Support 1,326 998 524 Total capital expenditures $ 11,134 $ 6,240 $ 7,322 (1) Includes $3.9 million and $30.5 million of restructuring charges in 2021 and 2020, respectively. (2) Includes a $0.1 million restructuring reversal and $8.6 million of restructuring charges in 2021 and 2020, respectively, and $24.5 million of impairment charges in 2020. (3) Includes a $0.1 million restructuring reversal and $4.6 million of restructuring charges in 2021 and 2020, respectively, and $8.5 million of impairment charges in 2020. (4) Includes a $0.5 million fair value adjustment to reduce the earnout and an $11.4 million fair value adjustment to increase the earnout in 2022 and 2021, respectively. (5) Includes $0.4 million and $4.7 million of restructuring charges in 2021 and 2020, respectively. (6) Includes a $0.2 million restructuring reversal and $4.0 million of restructuring charges in 2021 and 2020, respectively.
Identifiable Assets, Goodwill and Other Intangible Assets, Net, by Segment	The Company's goodwill by segment (for the segments that had recorded goodwill) is as follows: December 31, 2022 December 31, 2021 Executive Search Americas $ 91,383 $ 91,463 Europe 1,449 1,532 Total Executive Search 92,832 92,995 On-Demand Talent 45,529 45,529 Total goodwill $ 138,361 $ 138,524 Identifiable assets, and goodwill and other intangible assets, net, by segment, are as follows: December 31, 2022 2021 Current assets Executive Search Americas $ 566,015 $ 459,077 Europe 82,935 123,865 Asia Pacific 104,445 99,510 Total Executive Search 753,395 682,452 On-Demand Talent 20,237 22,478 Heidrick Consulting 47,154 36,640 Total segments 820,786 741,570 Global Operations Support 3,033 3,818 Total allocated current assets 823,819 745,388 Unallocated non-current assets 207,125 213,717 Goodwill and other intangible assets, net Executive Search Americas 91,434 91,566 Europe 1,665 1,995 Asia Pacific 15 33 Total Executive Search 93,114 93,594 On-Demand Talent 51,580 54,099 Heidrick Consulting — — Total goodwill and other intangible assets, net 144,694 147,693 Total assets $ 1,175,638 $ 1,106,798

Summary of Significant Accoun_4

Summary of Significant Accounting Policies - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Change in Accounting Estimate [Line Items]
Cash And Cash Equivalents Maximum Maturity Period	3 months
Concentration Risk, Customer	no	no
Vesting Period Of Deferred Cash Bonuses	3 years
Additional Vesting Period After Deferral Date For Bonus Payment	3 years
Percentage Of Estimated First Year Compensation Received For Executive Search Services	33.33%
Percentage Of Excess Of Actual Over Estimated Compensation Of Placed Candidate Billed To Client	33.33%
Percentage Increments Billed To Clients For Retainer And Indirect Expenses	33.33%
Maximum
Change in Accounting Estimate [Line Items]
Variation Percentage Of Deferred Cash Bonuses	15%

Summary of Significant Accoun_5

Summary of Significant Accounting Policies - Summary of Estimated Useful Life of Property and Equipment (Details)	12 Months Ended
	Dec. 31, 2022
Office furniture, fixtures and equipment | Minimum
Property, Plant and Equipment [Line Items]
Estimated useful life of assets	5 years
Office furniture, fixtures and equipment | Maximum
Property, Plant and Equipment [Line Items]
Estimated useful life of assets	10 years
Computer Equipment and Software [Member] | Minimum
Property, Plant and Equipment [Line Items]
Estimated useful life of assets	3 years
Computer Equipment and Software [Member] | Maximum
Property, Plant and Equipment [Line Items]
Estimated useful life of assets	7 years
Leasehold Improvements [Member] | Minimum
Property, Plant and Equipment [Line Items]
Estimated useful life of assets	3 years
Leasehold Improvements [Member] | Maximum
Property, Plant and Equipment [Line Items]
Estimated useful life of assets	10 years

Summary of Significant Accoun_6

Summary of Significant Accounting Policies - Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Net income (loss)	$ 79,486	$ 72,572	$ (37,707)
Weighted-average common shares outstanding, basic (in shares)	19,758,000	19,515,000	19,301,000
Weighted-average common shares outstanding, diluted (in shares)	20,618,000	20,296,000	19,301,000
Earnings Per Share, Basic	$ 4.02	$ 3.72	$ (1.95)
Earnings Per Share, Diluted	$ 3.86	$ 3.58	$ (1.95)
Restricted stock units
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements	644,000	587,000	0
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount			472,000
Performance stock units
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements	216,000	194,000	0
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount			120,000

Summary of Significant Accoun_7

Summary of Significant Accounting Policies - Restricted Cash (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Accounting Policies [Abstract]
Cash and cash equivalents	$ 355,447	$ 545,225	$ 316,473
Restricted Cash, Statement of Financial Position [Extensible Enumeration]	Other non-current assets	Other non-current assets	Other non-current assets
Restricted Cash	$ 42	$ 34	$ 16
Cash, cash equivalents and restricted cash at beginning of period	$ 355,489	$ 545,259	$ 316,489	$ 271,719

Revenue (Details)

Revenue (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Revenue from Contract with Customer [Abstract]
Unbilled Contracts Receivable	$ 13,940	$ 17,947
Increase (Decrease) in Unbilled Contracts Receivable	(4,007)
Unbilled Receivables, Current	21,348	18,995
Increase (Decrease) in Contract Assets	2,353
Contract with Customer, Asset, before Allowance for Credit Loss, Current	35,288	36,942
Increase (Decrease) in Contract with Customer, Asset	(1,654)
Deferred Revenue, Current	43,057	$ 51,404
Increase (Decrease) in Contract Liabilities	(8,347)
Deferred Revenue, Revenue Recognized	46,200
Contract with Customer, Performance Obligation Satisfied in Previous Period	$ 22,300

Credit Losses - Accounts Receiv

Credit Losses - Accounts Receivable, Allowance for Credit Loss (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Credit Loss [Abstract]
Beginning balance	$ 5,666	$ 6,557	$ 5,140
Provision for credit losses	7,938	4,991	6,696
Write-offs	6,830	5,730	5,418
Foreign currency translation	(131)	(152)	139
Ending balance	$ 6,643	$ 5,666	$ 6,557

Credit Losses - Summary of Cred

Credit Losses - Summary of Credit Losses (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
Debt Securities, Available-for-Sale, Unrealized Loss Position	$ 194,056,000
Debt Securities, Available-for-Sale, Unrealized Loss	56,000	$ 0
Fair Value	312,080,000
Cash and Cash Equivalents
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
Fair Value	11,918,000
Marketable Securities
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
Fair Value	$ 182,138,000

Credit Losses - Additional Info

Credit Losses - Additional Information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Credit Loss [Abstract]
Debt Securities, Available-for-Sale, Unrealized Loss	$ 56,000	$ 0

Property and Equipment, Net - C

Property and Equipment, Net - Components of Company's Property and Equipment (Detail) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 85,236	$ 81,478
Accumulated depreciation	(55,029)	(54,393)
Property and equipment, net	30,207	27,085
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross	40,829	42,252
Office furniture, fixtures and equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	14,322	14,933
Computer equipment and software
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 30,085	$ 24,293

Property and Equipment, Net - A

Property and Equipment, Net - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Property, Plant and Equipment [Abstract]
Depreciation expense	$ 7,400,000	$ 7,100,000	$ 8,100,000
Restructuring and Related Cost, Accelerated Depreciation		$ 900,000	$ 4,200,000

Leases - Additional Information

Leases - Additional Information (Details) - USD ($)	9 Months Ended	12 Months Ended			27 Months Ended
	Sep. 30, 2021	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 30, 2021
Lessee, Lease, Description [Line Items]
Restructuring charges		$ 0	$ 3,792,000	$ 52,372,000	$ 56,164,000
Early termination agreement payment	$ 11,700,000	11,700,000
Lease liability associated with surrendered office	17,400,000	17,400,000
Gain on early termination agreement	$ 5,700,000	5,700,000
Asset retirement obligation		$ 2,800,000	3,200,000
Office leases
Lessee, Lease, Description [Line Items]
Restructuring charges			$ 8,700,000
Minimum | Office leases
Lessee, Lease, Description [Line Items]
Lessee, operating lease, term of contract		1 year
Maximum | Office leases
Lessee, Lease, Description [Line Items]
Lessee, operating lease, term of contract		10 years 7 months 6 days
Maximum | Equipment lease
Lessee, Lease, Description [Line Items]
Lessee, operating lease, term of contract		5 years 6 months

Leases - Lease, Cost (Details)

Leases - Lease, Cost (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Leases [Abstract]
Operating lease cost	$ 17,408	$ 18,912
Variable lease cost	6,116	4,949
Total lease cost	$ 23,524	$ 23,861

Leases - Schedule of Cash Flow

Leases - Schedule of Cash Flow Information Related to Leases (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Leases [Abstract]
Operating cash flows from operating leases	$ 18,865	$ 40,473
Operating leases	$ 18,055	$ 11,397

Leases - Schedule of Weighted A

Leases - Schedule of Weighted Average Information Related to Leases (Details)	Dec. 31, 2022	Dec. 31, 2021
Leases [Abstract]
Operating leases	6 years 3 months 18 days	6 years 4 months 24 days
Operating leases	3.48%	3.22%

Leases - Lessee, Operating Leas

Leases - Lessee, Operating Lease, Liability, Maturity (Details) $ in Thousands	Dec. 31, 2022 USD ($)
Leases [Abstract]
2023	$ 18,914
2024	19,521
2025	11,982
2026	10,491
2027	7,886
Thereafter	23,799
Total lease payments	92,593
Less: Interest	(9,740)
Present value of lease liabilities	$ 82,853

Financial Instruments and Fai_3

Financial Instruments and Fair Value - Additional Information (Details) - USD ($)	Dec. 31, 2022	Dec. 31, 2021
Fair Value, Option, Quantitative Disclosures [Line Items]
Aggregate cost basis for investments	$ 29,100,000	$ 22,900,000
Level 3 | Earnout
Fair Value, Option, Quantitative Disclosures [Line Items]
Acquisition earnout accruals	36,010,000	35,654,000
Level 3 | Earnout | Other current liabilities
Fair Value, Option, Quantitative Disclosures [Line Items]
Acquisition earnout accruals	36,010,000	0
Level 3 | Earnout | Other liabilities
Fair Value, Option, Quantitative Disclosures [Line Items]
Acquisition earnout accruals	0	35,700,000
Level 3 | Contingent Compensation
Fair Value, Option, Quantitative Disclosures [Line Items]
Acquisition earnout accruals	8,192,000	4,141,000
Level 3 | Contingent Compensation | current accrued salaries and benefits
Fair Value, Option, Quantitative Disclosures [Line Items]
Acquisition earnout accruals	1,500,000
Level 3 | Contingent Compensation | non-current accrued salaries and benefits
Fair Value, Option, Quantitative Disclosures [Line Items]
Acquisition earnout accruals	$ 6,700,000	$ 4,100,000

Financial Instruments and Fai_4

Financial Instruments and Fair Value - Fair Value by Balance Sheet Classification (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Amortized Cost	$ 312,121
Unrealized Gains	15
Unrealized Losses	(56)
Fair Value	312,080
Cash and cash equivalents	355,447	$ 545,225
Marketable Securities	266,169
Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Amortized Cost	312,121
Unrealized Gains	15
Unrealized Losses	(56)
Fair Value	312,080
Cash and cash equivalents	108,249	279,992
Marketable Securities	266,169
Cash
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	247,198	265,233
Money Market Funds | Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	62,338	80,798
US Treasury Securities | Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Amortized Cost	312,121
Unrealized Gains	15
Unrealized Losses	(56)
Fair Value	312,080
Cash and cash equivalents	45,911	$ 199,194
Marketable Securities	$ 266,169

Financial Instruments and Fai_5

Financial Instruments and Fair Value - Fair Value by Level Grouping (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	$ 12,600	$ 14,000
Defined Benefit Plan, Benefit Obligation	(13,951)	(19,594)	$ (22,351)
Fair Value, Net Asset (Liability)	32,987	30,505
Other Current Assets
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value, Net Asset (Liability)	1,252	1,333
Assets Designated for Retirement and Pension Plans
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value, Net Asset (Liability)	11,332	12,715
Marketable Securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value, Net Asset (Liability)	34,354	36,051
Other Current Liabilities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value, Net Asset (Liability)	(1,252)	(1,333)
Retirement and Pension Plans
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value, Net Asset (Liability)	(12,699)	(18,261)
Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Deferred Compensation Plan Assets	34,354	36,051
Level 1 | Marketable Securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Deferred Compensation Plan Assets	34,354	36,051
Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	12,584	14,048
Defined Benefit Plan, Benefit Obligation	(13,951)	(19,594)
Fair Value, Net Asset (Liability)	(1,367)	(5,546)
Level 2 | Other Current Assets
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	1,252	1,333
Fair Value, Net Asset (Liability)	1,252	1,333
Level 2 | Assets Designated for Retirement and Pension Plans
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	11,332	12,715
Fair Value, Net Asset (Liability)	11,332	12,715
Level 2 | Other Current Liabilities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Defined Benefit Plan, Benefit Obligation	(1,252)	(1,333)
Fair Value, Net Asset (Liability)	(1,252)	(1,333)
Level 2 | Retirement and Pension Plans
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Defined Benefit Plan, Benefit Obligation	(12,699)	(18,261)
Fair Value, Net Asset (Liability)	$ (12,699)	$ (18,261)

Financial Instruments and Fai_6

Financial Instruments and Fair Value - Reconciliation of Beginning and Ending Balance of Level 3 Liabilities (Detail) - Level 3 - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Earnout
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Acquisition earnout accruals, beginning balance	$ (35,654)
Earnout accretion	(820)
Fair value adjustment	464	$ 11,400
Acquisition earnout accruals, ending balance	(36,010)	(35,654)
Contingent Compensation
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Acquisition earnout accruals, beginning balance	(4,141)
Compensation expense	(3,885)
Fair value adjustment	(500)	(11,400)
Foreign currency translation	(166)
Acquisition earnout accruals, ending balance	$ (8,192)	$ (4,141)

Acquisitions - Additional Infor

Acquisitions - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Business Acquisition [Line Items]
Goodwill acquired	$ 1,532,000
Operating income (loss)	112,266,000	$ 98,264,000	$ (35,529,000)
Europe
Business Acquisition [Line Items]
Goodwill acquired		1,500,000
H&S Finland
Business Acquisition [Line Items]
Revenue		1,100,000
Operating income (loss)		500,000
Earnout | Level 3
Business Acquisition [Line Items]
Fair value adjustment	464,000	11,400,000
Acquisition earnout accruals	36,010,000	35,654,000
On-Demand Talent
Business Acquisition [Line Items]
Finite-lived customer relationships, gross		5,800,000
Capitalized computer software, gross		3,100,000
Finite-lived trade names, gross		1,700,000
Goodwill acquired		45,500,000
Revenue		66,600,000
Operating income (loss)	(3,361,000)	(9,272,000)	$ 0
Business Talent Group
Business Acquisition [Line Items]
Business combination, contingent consideration arrangements, range of outcomes, value, low		20,000,000
Business combination, contingent consideration arrangements, range of outcomes, value, high		30,000,000
Accrued additional cash consideration		23,800,000
Finite-lived customer relationships, gross	5,800,000
Capitalized computer software, gross	3,100,000
Finite-lived trade names, gross	1,700,000
Business Talent Group | On-Demand Talent
Business Acquisition [Line Items]
Business combination, consideration transferred		32,600,000
Goodwill acquired	45,500,000	45,529,000
H&S Finland
Business Acquisition [Line Items]
Compensation expense	1,500,000	100,000
H&S Finland | Europe
Business Acquisition [Line Items]
Business combination, consideration transferred		$ 1,600,000
Goodwill acquired	$ 1,500,000

Goodwill and Other Intangible_3

Goodwill and Other Intangible Assets - Identifiable Assets, Goodwill and Other Intangible Assets, Net, by Segment (Details) - USD ($)	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Goodwill [Line Items]
Goodwill	$ 138,361,000	$ 138,524,000	$ 91,643,000	$ 126,831,000
Executive Search
Goodwill [Line Items]
Goodwill	92,832,000	92,995,000
On-Demand Talent
Goodwill [Line Items]
Goodwill	45,529,000	45,529,000
Americas | Executive Search
Goodwill [Line Items]
Goodwill	91,383,000	91,463,000	91,643,000	92,497,000
Europe | Executive Search
Goodwill [Line Items]
Goodwill	$ 1,449,000	$ 1,532,000	$ 0	$ 25,579,000

Goodwill and Other Intangible_4

Goodwill and Other Intangible Assets - Changes in Carrying Amount of Goodwill by Segment (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Goodwill [Roll Forward]
Goodwill	$ 171,331,000			$ 126,831,000
Accumulated impairment losses	(32,970,000)			0
Beginning Balance	138,524,000	$ 91,643,000	$ 126,831,000
Goodwill acquired	1,532,000
Foreign currency translation	(163,000)	(180,000)	(2,218,000)
Ending Balance	138,361,000	138,524,000	91,643,000
Executive Search
Goodwill [Roll Forward]
Beginning Balance	92,995,000
Ending Balance	92,832,000	92,995,000
On-Demand Talent
Goodwill [Roll Forward]
Goodwill	45,529,000
Beginning Balance	45,529,000
Goodwill acquired		45,500,000
Ending Balance	45,529,000	45,529,000
Americas | Executive Search
Goodwill [Roll Forward]
Goodwill	91,383,000			92,497,000
Accumulated impairment losses	0			0
Beginning Balance	91,463,000	91,643,000	92,497,000
Impairment	0
Foreign currency translation	(80,000)	(180,000)	(854,000)
Ending Balance	91,383,000	91,463,000	91,643,000
Europe
Goodwill [Roll Forward]
Accumulated impairment losses			(24,500,000)
Goodwill acquired		1,500,000
Europe | Executive Search
Goodwill [Roll Forward]
Goodwill	25,924,000			25,579,000
Accumulated impairment losses	(24,475,000)			0
Beginning Balance	1,532,000	0	25,579,000
Impairment			(24,475,000)
Goodwill acquired	(1,532,000)
Foreign currency translation	(83,000)	0	(1,104,000)
Ending Balance	1,449,000	1,532,000	0
Asia Pacific
Goodwill [Roll Forward]
Accumulated impairment losses			(8,500,000)
Asia Pacific | Executive Search
Goodwill [Roll Forward]
Goodwill	8,495,000			8,755,000
Accumulated impairment losses	(8,495,000)			$ 0
Beginning Balance	0	0	8,755,000
Impairment	0		(8,495,000)
Foreign currency translation	0	0	(260,000)
Ending Balance	0	0	0
2Get
Goodwill [Roll Forward]
Impairment			(32,970,000)
2Get | Americas | Executive Search
Goodwill [Roll Forward]
Goodwill acquired			$ 0
Business Talent Group | On-Demand Talent
Goodwill [Roll Forward]
Goodwill acquired	$ 45,500,000	$ 45,529,000

Goodwill and Other Intangible_5

Goodwill and Other Intangible Assets - Goodwill - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Goodwill And Other Intangible Assets [Line Items]
Goodwill acquired	$ 1,532,000
Accumulated impairment losses	$ (32,970,000)			$ 0
Weighted Average Life (in years)	8 years 7 months 6 days
Intangible asset amortization expense, excluding impairment charge	$ 3,200,000	$ 2,900,000	$ 700,000
Client relationships
Goodwill And Other Intangible Assets [Line Items]
Weighted Average Life (in years)	10 years 8 months 12 days
Software
Goodwill And Other Intangible Assets [Line Items]
Weighted Average Life (in years)	3 years
Trade name
Goodwill And Other Intangible Assets [Line Items]
Weighted Average Life (in years)	3 years 1 month 6 days
Europe
Goodwill And Other Intangible Assets [Line Items]
Goodwill acquired		1,500,000
Accumulated impairment losses			(24,500,000)
Asia Pacific
Goodwill And Other Intangible Assets [Line Items]
Accumulated impairment losses			$ (8,500,000)
Business Talent Group
Goodwill And Other Intangible Assets [Line Items]
Finite-lived customer relationships, gross	$ 5,800,000
Capitalized computer software, gross	3,100,000
Finite-lived trade names, gross	1,700,000
H&S Finland | Europe
Goodwill And Other Intangible Assets [Line Items]
Goodwill acquired	$ 1,500,000
On-Demand Talent
Goodwill And Other Intangible Assets [Line Items]
Goodwill acquired		45,500,000
Percentage of fair value excess by carrying value	13%
Finite-lived customer relationships, gross		5,800,000
Capitalized computer software, gross		3,100,000
Finite-lived trade names, gross		1,700,000
On-Demand Talent | Business Talent Group
Goodwill And Other Intangible Assets [Line Items]
Goodwill acquired	$ 45,500,000	$ 45,529,000
Weighted Average Life (in years)	7 years 4 months 24 days
On-Demand Talent | Business Talent Group | Client relationships
Goodwill And Other Intangible Assets [Line Items]
Weighted Average Life (in years)	11 years
On-Demand Talent | Business Talent Group | Software
Goodwill And Other Intangible Assets [Line Items]
Weighted Average Life (in years)	3 years
On-Demand Talent | Business Talent Group | Trade name
Goodwill And Other Intangible Assets [Line Items]
Weighted Average Life (in years)	3 years
Executive Search | Europe
Goodwill And Other Intangible Assets [Line Items]
Percentage of fair value excess by carrying value	8%
Accumulated impairment losses	$ (24,500,000)
Executive Search | Americas
Goodwill And Other Intangible Assets [Line Items]
Percentage of fair value excess by carrying value	220%
Executive Search | Asia Pacific
Goodwill And Other Intangible Assets [Line Items]
Accumulated impairment losses	$ (8,500,000)

Goodwill and Other Intangible_6

Goodwill and Other Intangible Assets - Summary of Other Intangible Assets Net by Segment (Detail) - USD ($)	Dec. 31, 2022	Dec. 31, 2021
Finite-Lived Intangible Assets [Line Items]
Net Carrying Amount	$ 6,333,000	$ 9,169,000
Executive Search
Finite-Lived Intangible Assets [Line Items]
Net Carrying Amount	282,000	599,000
On-Demand Talent
Finite-Lived Intangible Assets [Line Items]
Net Carrying Amount	6,051,000	8,570,000
Americas | Executive Search
Finite-Lived Intangible Assets [Line Items]
Net Carrying Amount	51,000	103,000
Europe | Executive Search
Finite-Lived Intangible Assets [Line Items]
Net Carrying Amount	216,000	463,000
Asia Pacific | Executive Search
Finite-Lived Intangible Assets [Line Items]
Net Carrying Amount	$ 15,000	$ 33,000

Goodwill and Other Intangible_7

Goodwill and Other Intangible Assets - Carrying Amount of Amortizable Intangible Assets and Related Accumulated Amortization (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Finite-Lived Intangible Assets [Line Items]
Weighted Average Life (in years)	8 years 7 months 6 days
Gross Carrying Amount	$ 16,236,000	$ 27,678,000
Accumulated Amortization	(9,903,000)	(18,509,000)
Net Carrying Amount	$ 6,333,000	9,169,000
Client relationships
Finite-Lived Intangible Assets [Line Items]
Weighted Average Life (in years)	10 years 8 months 12 days
Gross Carrying Amount	$ 10,720,000	22,127,000
Accumulated Amortization	(6,164,000)	(16,495,000)
Net Carrying Amount	$ 4,556,000	5,632,000
Trade name
Finite-Lived Intangible Assets [Line Items]
Weighted Average Life (in years)	3 years 1 month 6 days
Gross Carrying Amount	$ 2,406,000	2,441,000
Accumulated Amortization	(1,925,000)	(1,237,000)
Net Carrying Amount	$ 481,000	1,204,000
Software
Finite-Lived Intangible Assets [Line Items]
Weighted Average Life (in years)	3 years
Gross Carrying Amount	$ 3,110,000	3,110,000
Accumulated Amortization	(1,814,000)	(777,000)
Net Carrying Amount	$ 1,296,000	$ 2,333,000

Goodwill and Other Intangible_8

Goodwill and Other Intangible Assets - Intangible Assets- Additional Information (Detail) - USD ($)	Dec. 31, 2022	Dec. 31, 2021
Goodwill and Intangible Assets Disclosure [Abstract]
2023	$ 2,723,000
2024	1,151,000
2025	762,000
2026	527,000
2027	384,000
Thereafter	786,000
Net Carrying Amount	$ 6,333,000	$ 9,169,000

Other Assets (Details)

Other Assets (Details) - USD ($)	Dec. 31, 2022	Dec. 31, 2021
Other Liabilities Disclosure [Abstract]
Unbilled Receivables, Current	$ 35,288,000	$ 36,942,000
Other Assets, Miscellaneous, Current	5,434,000	4,507,000
Other Assets, Current	40,722,000	41,449,000
Other Sundry Liabilities	20,006,000	24,554,000
Other current liabilities	56,016,000	24,554,000
Earnout | Level 3
Acquisition earnout accruals	36,010,000	35,654,000
Earnout | Level 3 | Other Current Liabilities
Acquisition earnout accruals	$ 36,010,000	$ 0

Line of Credit - Additional Inf

Line of Credit - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Jul. 13, 2021
Debt Disclosure [Abstract]
Borrowing amount under term loan facility	$ 175,000,000			$ 200,000,000
Sublimit for letters of credit	25,000,000
Swingline Loan Sub Limit	10,000,000
Line of credit facility expansion feature	75,000,000
Proceeds from line of credit	0	$ 0	$ 100,000,000
Repayments of Lines of Credit	0	0	$ 100,000,000
Borrowings made or outstanding under line of credit	$ 0	$ 0

Employee Benefit Plans - Additi

Employee Benefit Plans - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Defined Benefit Plan Disclosure [Line Items]
Minimum amount of employee contributions	$ 6,000	$ 6,000	$ 6,000
Employer matching contribution, percent of match	6%	6%	6%
Discretionary contribution amount	$ 0	$ 0	$ 0
U.S. plan
Defined Benefit Plan Disclosure [Line Items]
Percentage to defer up base compensation of employees, effective from January 1, 2006	25%
Amount to defer up bonus compensation of employees, effective from January 1, 2006	$ 500,000
Percentage to defer up eligible bonus compensation, effective from January 1, 2006	25%
Amount of compensation deferred in plan	$ 33,400,000	34,900,000
Percentage to defer up cash component of director's fees for non-employee
Defined Benefit Plan Disclosure [Line Items]
Percentage to defer up directors' fees	100%
Non-employee Directors voluntary deferred compensation plan
Defined Benefit Plan Disclosure [Line Items]
Amount of compensation deferred in plan	$ 1,000,000	1,100,000
Qualified plan
Defined Benefit Plan Disclosure [Line Items]
Percentage for employee pre-tax and/or after-tax contributions, minimum	1%
Percentage for employee pre-tax and/or after-tax contributions, maximum	50%
Defined Contribution Plan, Cost	$ 7,800,000	$ 6,800,000	$ 5,700,000

Pension Plan and Life Insuran_3

Pension Plan and Life Insurance Contract - Reconcile Benefit Obligation for Pension Plan (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Retirement Benefits [Abstract]
Defined Benefit Plan, Benefit Obligation, Beginning Balance	$ 19,594	$ 22,351
Interest cost	181	150	$ 212
Actuarial loss	(3,361)	(11)
Benefits paid	(1,257)	(1,400)
Cumulative translation adjustment	(1,206)	(1,496)
Defined Benefit Plan, Benefit Obligation, Ending Balance	$ 13,951	$ 19,594	$ 22,351

Pension Plan and Life Insuran_4

Pension Plan and Life Insurance Contract - Schedule of Amounts Recognized in Balance Sheet (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Retirement Benefits [Abstract]
Current liabilities	$ 1,252	$ 1,333
Noncurrent liabilities	12,699	18,261
Total	$ 13,951	$ 19,594

Pension Plan and Life Insuran_5

Pension Plan and Life Insurance Contract - Additional Information (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Retirement Benefits [Abstract]
Defined Benefit Plan Amounts in Accumulated Other Comprehensive Income Not Yet Recognized In Net Periodic Benefit Cost	$ 700	$ 4,500
Defined Benefit Plan, Fair Value of Plan Assets	$ 12,600	$ 14,000

Pension Plan and Life Insuran_6

Pension Plan and Life Insurance Contract - Components of Assumptions Used to Determine Net Periodic Benefit Cost (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Retirement Benefits [Abstract]
Interest cost	Salaries and benefits
Interest cost	$ 181	$ 150	$ 212
Amortization of net loss	Salaries and benefits
Amortization of net loss	$ 195	211	140
Net periodic benefit cost	$ 376	$ 361	$ 352
Weighted average assumptions
Discount rate	1.03%	0.72%	1.03%
Rate of compensation increase	0%	0%	0%

Pension Plan and Life Insuran_7

Pension Plan and Life Insurance Contract - Schedule of Assumptions Used (Details)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Retirement Benefits [Abstract]
Discount rate	4.09%	1.03%	0.72%
Rate of compensation increase	0%	0%	0%
Measurement Date	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020

Pension Plan and Life Insuran_8

Pension Plan and Life Insurance Contract - Schedule of Expected Benefit Payments (Details) $ in Thousands	Dec. 31, 2022 USD ($)
Retirement Benefits [Abstract]
2023	$ 1,252
2024	1,237
2025	1,216
2026	1,190
2027	1,160
2028 through 2032	$ 5,167

Stock-based Compensation - Addi

Stock-based Compensation - Additional Information (Detail) - USD ($)	12 Months Ended			132 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares issued in period (in shares)				3,769,836
Number of awards forfeited (in shares)	758,632
Shares available for future awards (in shares)	338,796			338,796
Phantom Share Units (PSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Allocated share-based compensation expense	$ 1,200,000	$ 7,800,000	$ 3,200,000
Pre-tax unrecognized compensation expense	$ 2,200,000			$ 2,200,000
Expected time to be recognized	2 years 10 months 24 days
Restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Pre-tax unrecognized compensation expense	$ 6,000,000			6,000,000
Expected time to be recognized	2 years 3 months 18 days
Restricted stock units | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance stock units vesting period	3 years
Restricted stock units | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance stock units vesting period	4 years
Performance stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Pre-tax unrecognized compensation expense	$ 5,300,000			$ 5,300,000
Expected time to be recognized	1 year 8 months 12 days
Performance stock units | Executive Officer
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance stock units vesting period	3 years
Performance stock units | Minimum | Executive Officer
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance stock units, variation percentage	0%
Performance stock units | Maximum | Executive Officer
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance stock units, variation percentage	200%

Stock-based Compensation - Summ

Stock-based Compensation - Summary of Information with Respect to Stock-Based Compensation (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Income tax benefit related to stock-based compensation included in net income	$ 4,263,000	$ 5,539,000	$ 3,571,000
Salaries and employee benefits
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based payment arrangement, expensed and capitalized, amount	14,651,000	20,081,000	12,968,000
General and administrative expenses
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based payment arrangement, expensed and capitalized, amount	$ 810,000	$ 345,000	$ 460,000

Stock-based Compensation - Rest

Stock-based Compensation - Restricted Stock Unit Activity (Detail) - Restricted stock units - $ / shares	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Number of Restricted Stock Units
Number of Stock Units, Beginning balance (in shares)	727,651	707,864
Number of Stock Units, Granted (in shares)	287,954	257,070
Number of Stock Units, Vested (in shares)	(273,565)	(218,950)
Number of Stock Units, Forfeited (in shares)	(13,755)	(18,333)
Number of Stock Units, Ending balance (in shares)	728,285	727,651
Weighted- Average Grant-date Fair Value
Weighted-Average Grant-date Fair Value, Beginning balance (in dollars per share)	$ 31.32	$ 28.35
Weighted-Average Grant-date Fair Value, Granted (in dollars per share)	34.05	38.89
Weighted-Average Grant-date Fair Value, Vested and converted to common stock (in dollars per share)	32.29	30.65
Weighted-Average Grant-date Fair Value, Forfeited (in dollars per share)	34.63	30.80
Weighted-Average Grant-date Fair Value, Ending balance (in dollars per share)	$ 31.97	$ 31.32

Stock-based Compensation - Perf

Stock-based Compensation - Performance Stock Unit Activity (Detail) - Performance stock units - $ / shares	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Number of Performance Stock Units
Number of Stock Units, Beginning balance (in shares)	232,857	234,934
Number of Stock Units, Granted (in shares)	97,379	106,357
Number of Stock Units, Vested (in shares)	(69,784)	(90,284)
Number of Stock Units, Forfeited (in shares)	0	(18,150)
Number of Stock Units, Ending balance (in shares)	260,452	232,857
Weighted- Average Grant-date Fair Value
Weighted-Average Grant-date Fair Value, Beginning balance (in dollars per share)	$ 39.88	$ 35.09
Weighted-Average Grant-date Fair Value, Granted (in dollars per share)	49.59	42.07
Weighted-Average Grant-date Fair Value, Vested and converted to common stock (in dollars per share)	52.91	30.60
Weighted-Average Grant-date Fair Value, Forfeited (in dollars per share)	0	36.83
Weighted-Average Grant-date Fair Value, Ending balance (in dollars per share)	$ 40.02	$ 39.88

Stock-Based Compensation - Ph_2

Stock-Based Compensation - Phantom Stock Unit Activity (Details) - Phantom Share Units (PSUs) - shares	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Schedule of Nonvested Performance-based Phantom Units [Line Items]
Number of Stock Units, Beginning balance (in shares)	348,863	351,634
Number of Stock Units, Granted (in shares)	95,675	63,575
Number of Stock Units, Vested (in shares)	(119,333)	(61,539)
Number of Stock Units, Forfeited (in shares)	(4,050)	(4,807)
Number of Stock Units, Ending balance (in shares)	321,155	348,863

Changes in Accumulated Other _3

Changes in Accumulated Other Comprehensive Income - Changes in Accumulated Other Comprehensive Income ("AOCI") by Component (Detail)	12 Months Ended
	Dec. 31, 2022 USD ($)
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Equity at beginning of period	$ 336,020,000
Equity at end of period	410,646,000
Available- for- Sale Securities
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Equity at beginning of period	0
Other comprehensive income (loss) before classification, net of tax	(41,000)
Equity at end of period	(41,000)
Foreign Currency Translation
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Equity at beginning of period	4,294,000
Other comprehensive income (loss) before classification, net of tax	(8,457,000)
Equity at end of period	(4,163,000)
Pension
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Equity at beginning of period	(2,619,000)
Other comprehensive income (loss) before classification, net of tax	2,634,000
Equity at end of period	15,000
AOCI
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Equity at beginning of period	1,675,000
Other comprehensive income (loss) before classification, net of tax	(5,864,000)
Equity at end of period	$ (4,189,000)

Restructuring - Restructuring A

Restructuring - Restructuring Accrual by Segment (Details) - USD ($)	12 Months Ended			27 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 30, 2021
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 0	$ 3,792,000	$ 52,372,000	$ 56,164,000
Employee related
Restructuring Cost and Reserve [Line Items]
Restructuring charges		(183,000)	32,780,000	32,597,000
Office related
Restructuring Cost and Reserve [Line Items]
Restructuring charges		3,962,000	18,910,000	22,872,000
Other
Restructuring Cost and Reserve [Line Items]
Restructuring charges		13,000	682,000	695,000
Global Operations Support
Restructuring Cost and Reserve [Line Items]
Restructuring charges		(224,000)	4,019,000	3,795,000
Global Operations Support | Employee related
Restructuring Cost and Reserve [Line Items]
Restructuring charges		62,000	1,354,000	1,416,000
Global Operations Support | Office related
Restructuring Cost and Reserve [Line Items]
Restructuring charges		(296,000)	2,115,000	1,819,000
Global Operations Support | Other
Restructuring Cost and Reserve [Line Items]
Restructuring charges		10,000	550,000	560,000
Heidrick Consulting
Restructuring Cost and Reserve [Line Items]
Restructuring charges		400,000	4,700,000
Heidrick Consulting | Operating Segments
Restructuring Cost and Reserve [Line Items]
Restructuring charges		355,000	4,657,000	5,012,000
Heidrick Consulting | Operating Segments | Employee related
Restructuring Cost and Reserve [Line Items]
Restructuring charges		(44,000)	2,633,000	2,589,000
Heidrick Consulting | Operating Segments | Office related
Restructuring Cost and Reserve [Line Items]
Restructuring charges		399,000	1,953,000	2,352,000
Heidrick Consulting | Operating Segments | Other
Restructuring Cost and Reserve [Line Items]
Restructuring charges		0	71,000	71,000
Americas
Restructuring Cost and Reserve [Line Items]
Restructuring charges		3,900,000	30,500,000
Americas | Executive Search | Operating Segments
Restructuring Cost and Reserve [Line Items]
Restructuring charges		3,882,000	30,479,000	34,361,000
Americas | Executive Search | Operating Segments | Employee related
Restructuring Cost and Reserve [Line Items]
Restructuring charges		20,000	16,206,000	16,226,000
Americas | Executive Search | Operating Segments | Office related
Restructuring Cost and Reserve [Line Items]
Restructuring charges		3,859,000	14,242,000	18,101,000
Americas | Executive Search | Operating Segments | Other
Restructuring Cost and Reserve [Line Items]
Restructuring charges		3,000	31,000	34,000
Europe
Restructuring Cost and Reserve [Line Items]
Restructuring charges		100,000	8,600,000
Europe | Executive Search | Operating Segments
Restructuring Cost and Reserve [Line Items]
Restructuring charges		(97,000)	8,603,000	8,506,000
Europe | Executive Search | Operating Segments | Employee related
Restructuring Cost and Reserve [Line Items]
Restructuring charges		(97,000)	8,353,000	8,256,000
Europe | Executive Search | Operating Segments | Office related
Restructuring Cost and Reserve [Line Items]
Restructuring charges		0	226,000	226,000
Europe | Executive Search | Operating Segments | Other
Restructuring Cost and Reserve [Line Items]
Restructuring charges		0	24,000	24,000
Asia Pacific
Restructuring Cost and Reserve [Line Items]
Restructuring charges		100,000	4,600,000
Asia Pacific | Executive Search | Operating Segments
Restructuring Cost and Reserve [Line Items]
Restructuring charges		(124,000)	4,614,000	4,490,000
Asia Pacific | Executive Search | Operating Segments | Employee related
Restructuring Cost and Reserve [Line Items]
Restructuring charges		(124,000)	4,234,000	4,110,000
Asia Pacific | Executive Search | Operating Segments | Office related
Restructuring Cost and Reserve [Line Items]
Restructuring charges		0	374,000	374,000
Asia Pacific | Executive Search | Operating Segments | Other
Restructuring Cost and Reserve [Line Items]
Restructuring charges		$ 0	$ 6,000	$ 6,000

Restructuring - Additional Info

Restructuring - Additional Information (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2021	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Restructuring Cost and Reserve [Line Items]
Early termination agreement payment	$ 11,700	$ 11,700
Lease liability associated with surrendered office	17,400	17,400
Gain on early termination agreement	$ 5,700	5,700
Restructuring Reserve		3,422	$ 8,394	$ 23,265	$ 3,245
Employee-related liabilities, current
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve		4,900
Accrued salaries and benefits
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve		$ 3,600

Restructuring - Changes in Rest

Restructuring - Changes in Restructuring Accrual (Details) - USD ($)	12 Months Ended			27 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 30, 2021
Schedule of Restructuring Charges and Related Cash Payments [Line Items]
Restructuring reserve at beginning of period	$ 8,394,000	$ 23,265,000	$ 3,245,000
Restructuring charges	0	3,792,000	52,372,000	$ 56,164,000
Cash payments	(4,853,000)	(14,453,000)	(12,263,000)
Non-cash write-offs	(34,000)	(4,146,000)	(19,456,000)
Other			(173,000)
Exchange rate fluctuations	(85,000)	(64,000)	(460,000)
Restructuring reserve at end of period	3,422,000	8,394,000	23,265,000
Employee related
Schedule of Restructuring Charges and Related Cash Payments [Line Items]
Restructuring reserve at beginning of period	8,394,000	22,312,000	3,245,000
Restructuring charges		(183,000)	32,780,000	32,597,000
Cash payments	(4,853,000)	(13,702,000)	(11,443,000)
Non-cash write-offs	(34,000)	44,000	(1,633,000)
Other			(173,000)
Exchange rate fluctuations	(85,000)	(77,000)	(464,000)
Restructuring reserve at end of period	3,422,000	8,394,000	22,312,000
Office related
Schedule of Restructuring Charges and Related Cash Payments [Line Items]
Restructuring reserve at beginning of period	0	953,000	0
Restructuring charges		3,962,000	18,910,000	22,872,000
Cash payments	0	(738,000)	(138,000)
Non-cash write-offs	0	(4,190,000)	(17,823,000)
Other			0
Exchange rate fluctuations	0	13,000	4,000
Restructuring reserve at end of period	0	0	953,000
Other
Schedule of Restructuring Charges and Related Cash Payments [Line Items]
Restructuring reserve at beginning of period	0	0	0
Restructuring charges		13,000	682,000	$ 695,000
Cash payments	0	(13,000)	(682,000)
Non-cash write-offs	0	0	0
Other			0
Exchange rate fluctuations	0	0	0
Restructuring reserve at end of period	$ 0	$ 0	$ 0

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Operating Loss Carryforwards [Line Items]
Deferred Tax Liability Not Eligible for Netting	$ 500	$ 100
Valuation allowance	$ 20,724	20,396
Several statutes of limitation expected to close	12 months
Minimum
Operating Loss Carryforwards [Line Items]
Losses carried forward	five
Foreign Tax Authority
Operating Loss Carryforwards [Line Items]
Net operating loss carryforward	$ 103,400	111,000
Net operating loss carryforward subject to valuation allowance	64,000	64,700
Deferred Tax Assets, Tax Credit Carryforwards	5,500	5,400
Tax Credit Carryforward, Valuation Allowance	$ 5,500	$ 5,400
Federal Tax Authority | Minimum
Operating Loss Carryforwards [Line Items]
Income Tax Examination, Year under Examination	2018
State Tax Authority | Minimum
Operating Loss Carryforwards [Line Items]
Income Tax Examination, Year under Examination	2019
State Tax Authority | Maximum
Operating Loss Carryforwards [Line Items]
Income Tax Examination, Year under Examination	2021

Income Taxes - Sources of Incom

Income Taxes - Sources of Income before Income Taxes (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Income Tax Disclosure [Abstract]
United States	$ 57,274	$ 68,122	$ 11,346
Foreign	57,962	37,907	(42,744)
Income (loss) before income taxes	$ 115,236	$ 106,029	$ (31,398)

Income Taxes - Provision for (B

Income Taxes - Provision for (Benefit from) Income Taxes (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Current
Federal	$ 13,405	$ 21,200	$ 4,469
State and local	6,748	9,341	1,948
Foreign	8,813	9,802	2,172
Current provision for income taxes	28,966	40,343	8,589
Deferred
Federal	3,702	(3,373)	(2,416)
State and local	1,113	(1,825)	(697)
Foreign	1,969	(1,688)	833
Deferred provision (benefit) for income taxes	6,784	(6,886)	(2,280)
Total provision for income taxes	$ 35,750	$ 33,457	$ 6,309

Income Taxes - Reconciliation o

Income Taxes - Reconciliation of Provision for (Benefit from) Income Taxes (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Income Tax Disclosure [Abstract]
Statutory U.S. federal income tax rate	21%
Income tax provision (benefit) at the statutory U.S. federal rate	$ 24,199	$ 22,266	$ (6,594)
State income tax provision, net of federal tax benefit	5,475	4,994	735
Nondeductible expenses, net	4,036	2,833	6,950
Foreign taxes (includes rate differential and changes in foreign valuation allowance)	1,647	1,910	4,470
Establishment (release) of valuation allowance	0	(157)	566
Additional U.S. tax on foreign operations	(436)	(242)	(115)
Other, net	(43)	1,369	67
Total provision for income taxes	$ 35,750	$ 33,457	$ 6,309

Income Taxes - Summary of Defer

Income Taxes - Summary of Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Deferred tax assets attributable to:
Operating lease liability and accrued rent	$ 16,693	$ 16,118
Foreign net operating loss carryforwards	14,528	15,555
Accrued compensation and employee benefits	20,776	25,844
Deferred compensation	17,994	21,289
Foreign tax credit carryforwards	5,522	5,382
Other accrued expenses	6,257	3,083
Deferred tax assets, before valuation allowance	81,770	87,271
Valuation allowance	(20,724)	(20,396)
Deferred tax assets, after valuation allowance	61,046	66,875
Deferred tax liabilities attributable to:
Operating lease, right-of-use assets	13,020	12,820
Goodwill	9,493	7,526
Depreciation on property and equipment	3,449	3,169
Other	1,592	1,310
Deferred tax liabilities	27,554	24,825
Net deferred tax assets	$ 33,492	$ 42,050

Income Taxes - Reconciliation_2

Income Taxes - Reconciliation of Amounts of Gross Unrecognized Tax Benefits (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Unrecognized Tax Benefits Reconciliation [Roll Forward]
Unrecognized Tax Benefits, Beginning Balance	$ 0	$ 416	$ 130
Gross increases for tax positions of prior years	0	6	500
Gross decreases for tax positions of prior years	0	(14)	(31)
Settlements	0	(408)	(183)
Unrecognized Tax Benefits, Ending Balance	$ 0	$ 0	$ 416

Segment Information - Additiona

Segment Information - Additional Information (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
United States
Segment Reporting Information [Line Items]
Revenue	$ 703,700	$ 650,900	$ 377,800
Long-lived assets	$ 260,600	$ 257,900
Operating Segments
Segment Reporting Information [Line Items]
Number of reportable segments	5

Segment Information - Revenue,

Segment Information - Revenue, Operating Income, Depreciation and Amortization, and Capital Expenditures, by Segment (Detail) - USD ($)	12 Months Ended			27 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 30, 2021	Dec. 31, 2019
Segment Reporting Information [Line Items]
Total revenue	$ 1,083,586,000	$ 1,008,474,000	$ 629,370,000
Operating income (loss)	112,266,000	98,264,000	(35,529,000)
Depreciation and amortization	10,603,000	19,560,000	26,656,000
Capital expenditures	11,134,000	6,240,000	7,322,000
Restructuring charges	0	3,792,000	52,372,000	$ 56,164,000
Goodwill, Impaired, Accumulated Impairment Loss	32,970,000				$ 0
Contingent Compensation | Level 3
Segment Reporting Information [Line Items]
Fair value adjustment	(500,000)	(11,400,000)
Segment Reconciling Items
Segment Reporting Information [Line Items]
Operating income (loss)	(20,414,000)	0	0
Depreciation and amortization	524,000	0	0
Capital expenditures	4,878,000	0	0
Total segments
Segment Reporting Information [Line Items]
Operating income (loss)	191,670,000	153,197,000	4,886,000
Depreciation and amortization	9,622,000	19,099,000	25,997,000
Capital expenditures	4,930,000	5,242,000
Executive Search
Segment Reporting Information [Line Items]
Operating income (loss)	202,186,000	178,631,000	33,255,000
Depreciation and amortization	6,075,000	16,044,000	25,044,000
Capital expenditures	4,070,000	5,068,000	6,682,000
On-Demand Talent
Segment Reporting Information [Line Items]
Revenue		66,600,000
Operating income (loss)	(3,361,000)	(9,272,000)	0
Depreciation and amortization	2,669,000	2,010,000	0
Capital expenditures	732,000	0	0
Heidrick Consulting
Segment Reporting Information [Line Items]
Operating income (loss)	(7,155,000)	(16,162,000)	(28,369,000)
Depreciation and amortization	878,000	1,045,000	953,000
Capital expenditures	128,000	174,000	116,000
Restructuring charges		400,000	4,700,000
Global Operations Support
Segment Reporting Information [Line Items]
Operating income (loss)	(58,990,000)	(54,933,000)	(40,415,000)
Depreciation and amortization	457,000	461,000	659,000
Capital expenditures	1,326,000	998,000	524,000
Restructuring charges		200,000	4,000,000
Service
Segment Reporting Information [Line Items]
Revenue	1,073,464,000	1,003,001,000	621,615,000
Service | Executive Search
Segment Reporting Information [Line Items]
Revenue	901,922,000	868,760,000	565,170,000
Service | On-Demand Talent
Segment Reporting Information [Line Items]
Revenue	91,349,000	66,636,000	0
Service | Heidrick Consulting
Segment Reporting Information [Line Items]
Revenue	80,193,000	67,605,000	56,445,000
Reimbursements
Segment Reporting Information [Line Items]
Revenue	10,122,000	5,473,000	7,755,000
Americas
Segment Reporting Information [Line Items]
Restructuring charges		3,900,000	30,500,000
Americas | Executive Search
Segment Reporting Information [Line Items]
Operating income (loss)	164,225,000	142,040,000	62,806,000
Depreciation and amortization	3,498,000	12,843,000	20,937,000
Capital expenditures	1,890,000	4,487,000	4,258,000
Americas | Service | Executive Search
Segment Reporting Information [Line Items]
Revenue	612,881,000	581,440,000	361,416,000
Europe
Segment Reporting Information [Line Items]
Restructuring charges		100,000	8,600,000
Goodwill, Impaired, Accumulated Impairment Loss			24,500,000
Europe | Executive Search
Segment Reporting Information [Line Items]
Operating income (loss)	19,274,000	18,424,000	(22,827,000)
Depreciation and amortization	1,451,000	1,802,000	2,270,000
Capital expenditures	683,000	372,000	409,000
Goodwill, Impaired, Accumulated Impairment Loss	24,500,000
Europe | Service | Executive Search
Segment Reporting Information [Line Items]
Revenue	176,275,000	170,312,000	124,243,000
Asia Pacific
Segment Reporting Information [Line Items]
Restructuring charges		100,000	4,600,000
Goodwill, Impaired, Accumulated Impairment Loss			8,500,000
Asia Pacific | Total segments
Segment Reporting Information [Line Items]
Capital expenditures			6,798,000
Asia Pacific | Executive Search
Segment Reporting Information [Line Items]
Operating income (loss)	18,687,000	18,167,000	(6,724,000)
Depreciation and amortization	1,126,000	1,399,000	1,837,000
Capital expenditures	1,497,000	209,000	2,015,000
Goodwill, Impaired, Accumulated Impairment Loss	8,500,000
Asia Pacific | Service | Executive Search
Segment Reporting Information [Line Items]
Revenue	$ 112,766,000	$ 117,008,000	$ 79,511,000

Segment Information - Identifia

Segment Information - Identifiable Assets, Goodwill and Other Intangible Assets, Net, by Segment (Detail) - USD ($)	Dec. 31, 2022	Dec. 31, 2021
Goodwill And Identifiable Intangible Assets [Line Items]
Total allocated current assets	$ 823,819,000	$ 745,388,000
Unallocated non-current assets	207,125,000	213,717,000
Total goodwill and other intangible assets, net	144,694,000	147,693,000
Total assets	1,175,638,000	1,106,798,000
Total segments
Goodwill And Identifiable Intangible Assets [Line Items]
Total allocated current assets	820,786,000	741,570,000
Executive Search
Goodwill And Identifiable Intangible Assets [Line Items]
Total allocated current assets	753,395,000	682,452,000
Total goodwill and other intangible assets, net	93,114,000	93,594,000
On-Demand Talent
Goodwill And Identifiable Intangible Assets [Line Items]
Total allocated current assets	20,237,000	22,478,000
Total goodwill and other intangible assets, net	51,580,000	54,099,000
Heidrick Consulting
Goodwill And Identifiable Intangible Assets [Line Items]
Total allocated current assets	47,154,000	36,640,000
Total goodwill and other intangible assets, net	0	0
Global Operations Support
Goodwill And Identifiable Intangible Assets [Line Items]
Total allocated current assets	3,033,000	3,818,000
Americas | Executive Search
Goodwill And Identifiable Intangible Assets [Line Items]
Total allocated current assets	566,015,000	459,077,000
Total goodwill and other intangible assets, net	91,434,000	91,566,000
Europe | Executive Search
Goodwill And Identifiable Intangible Assets [Line Items]
Total allocated current assets	82,935,000	123,865,000
Total goodwill and other intangible assets, net	1,665,000	1,995,000
Asia Pacific | Executive Search
Goodwill And Identifiable Intangible Assets [Line Items]
Total allocated current assets	104,445,000	99,510,000
Total goodwill and other intangible assets, net	$ 15,000	$ 33,000

Guarantees - Additional Informa

Guarantees - Additional Information (Detail) $ in Thousands	Dec. 31, 2022 USD ($)
Guarantees [Abstract]
Maximum undiscounted payments under outstanding guarantees	$ 4,600

Subsequent Events (Details)

Subsequent Events (Details) - Atreus Group GmbH	12 Months Ended
	Dec. 31, 2022 USD ($)
Subsequent Event [Line Items]
Business combination, consideration transferred	$ 33,500,000
Business Combination, Consideration to be Transferred	9,000,000
Business Combination, Consideration to be Transferred, high range	13,000,000
Business combination, contingent consideration arrangements, range of outcomes, value, low	30,000,000
Business combination, contingent consideration arrangements, range of outcomes, value, high	$ 40,000,000