Heidrick & Struggles International (HSII) 10-Q 24 Oct 22 2022 Q3 Quarterly report Financial data

Cover

Cover - shares	9 Months Ended
	Sep. 30, 2022	Oct. 21, 2022
Cover [Abstract]
Document Type	10-Q
Document Period End Date	Sep. 30, 2022
Document Quarterly Report	true
Document Transition Report	false
Entity Filer Category	Large Accelerated Filer
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
City Area Code	(312)
Local Phone Number	496-1200
Title of 12(b) Security	Common Stock, $0.01 par value
Trading Symbol	HSII
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		19,860,628
Entity Central Index Key	0001066605
Document Fiscal Year Focus	2022
Current Fiscal Year End Date	--12-31
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
Document Fiscal Period Focus	Q3
Amendment Flag	false
Document Information [Line Items]
Entity Shell Company	false
Entity Emerging Growth Company	false

Statement of Financial Position

Statement of Financial Position, Classified (Statement) - USD ($)	Sep. 30, 2022	Dec. 31, 2021
Assets, Current [Abstract]
Cash and Cash Equivalents, at Carrying Value	$ 275,468,000	$ 545,225,000
Marketable Securities, Current	180,507,000	0
Accounts Receivable, after Allowance for Credit Loss, Current	190,893,000	133,750,000
Prepaid Expense	27,322,000	21,754,000
Other Assets, Current	41,578,000	41,449,000
Income Taxes Receivable	4,348,000	3,210,000
Assets, Current	720,116,000	745,388,000
Assets, Noncurrent [Abstract]
Property, Plant and Equipment, Net	29,317,000	27,085,000
Operating Lease, Right-of-Use Asset	69,400,000	72,320,000
Assets for Plan Benefits, Defined Benefit Plan	10,961,000	12,715,000
Long-term Investments	31,728,000	36,051,000
Other Assets, Noncurrent	26,379,000	23,377,000
Goodwill	138,069,000	138,524,000
Other Intangible Assets, Net	6,998,000	9,169,000
Deferred Income Tax Assets, Net	40,285,000	42,169,000
Assets, Noncurrent	353,137,000	361,410,000
Assets	1,073,253,000	1,106,798,000
Liabilities, Current [Abstract]
Accounts Payable, Current	17,248,000	20,374,000
Employee-related Liabilities, Current	375,430,000	409,026,000
Deferred Revenue, Current	43,547,000	51,404,000
Operating Lease, Liability, Current	17,854,000	19,332,000
Other Liabilities, Current	59,301,000	24,554,000
Accrued Income Taxes, Current	5,224,000	10,004,000
Liabilities, Current	518,604,000	534,694,000
Liabilities, Noncurrent [Abstract]
Accrued Salaries and Benefits	56,742,000	73,779,000
Liability, Defined Benefit Plan, Noncurrent	48,730,000	55,593,000
Operating Lease, Liability, Noncurrent	60,396,000	65,625,000
Other Liabilities, Noncurrent	4,250,000	41,087,000
Liabilities, Noncurrent	170,118,000	236,084,000
Liabilities	688,722,000	770,778,000
Stockholders' Equity Attributable to Parent [Abstract]
Preferred Stock, Value, Issued	0	0
Common Stock, Value, Issued	199,000	196,000
Treasury Stock, Value	(191,000)	(191,000)
Additional Paid in Capital, Common Stock	241,632,000	233,163,000
Retained Earnings (Accumulated Deficit)	155,276,000	101,177,000
Accumulated Other Comprehensive Income (Loss), Net of Tax	(12,385,000)	1,675,000
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	384,531,000	336,020,000
Liabilities and Equity	$ 1,073,253,000	$ 1,106,798,000

Statement of Income (Statement)

Statement of Income (Statement) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Revenue from Contract with Customer, Excluding Assessed Tax	$ 258,271,000	$ 265,315,000	$ 844,917,000	$ 721,281,000
Labor and Related Expense	171,473,000	185,904,000	580,602,000	513,321,000
General and Administrative Expense	32,189,000	29,155,000	97,186,000	83,876,000
Research and Development Expense	5,400,000	0	14,347,000	0
Restructuring Charges	0	(3,262,000)	0	3,792,000
Operating Expenses	229,949,000	231,973,000	752,497,000	639,625,000
Operating Income (Loss)	28,322,000	33,342,000	92,420,000	81,656,000
Interest Income (Expense), Net	1,255,000	90,000	1,664,000	207,000
Other Nonoperating Income (Expense)	(43,000)	145,000	(1,740,000)	6,260,000
Nonoperating Income (Expense)	1,212,000	235,000	(76,000)	6,467,000
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	29,534,000	33,577,000	92,344,000	88,123,000
Income Tax Expense (Benefit)	8,708,000	9,079,000	28,902,000	28,028,000
Net Income (Loss) Attributable to Parent	20,826,000	24,498,000	63,442,000	60,095,000
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax	(5,462,000)	(661,000)	(14,068,000)	(1,349,000)
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax, Portion Attributable to Parent	8,000	0	8,000	0
Other Comprehensive Income (Loss), Net of Tax	(5,454,000)	(661,000)	(14,060,000)	(1,349,000)
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	$ 15,372,000	$ 23,837,000	$ 49,382,000	$ 58,746,000
Weighted Average Number of Shares Outstanding, Basic	19,816,000	19,569,000	19,723,000	19,489,000
Weighted Average Number of Shares Outstanding, Diluted	20,413,000	20,240,000	20,558,000	20,259,000
Earnings Per Share, Basic	$ 1.05	$ 1.25	$ 3.22	$ 3.08
Earnings Per Share, Diluted	1.02	1.21	3.09	2.97
Common Stock, Dividends, Per Share, Declared	$ 0.15	$ 0.15	$ 0.45	$ 0.45
Retained Earnings
Net Income (Loss) Attributable to Parent	$ 20,826,000	$ 24,498,000
AOCI Attributable to Parent
Other Comprehensive Income (Loss), Net of Tax	(5,454,000)	(661,000)
Reimbursements
Revenue from Contract with Customer, Excluding Assessed Tax	3,086,000	1,490,000	$ 7,170,000	$ 3,819,000
Cost of Goods and Services Sold	3,086,000	1,490,000	7,170,000	3,819,000
Cost of Services
Cost of Goods and Services Sold	17,801,000	18,686,000	53,192,000	34,817,000
Service
Revenue from Contract with Customer, Excluding Assessed Tax	$ 255,185,000	$ 263,825,000	$ 837,747,000	$ 717,462,000

Statement of Shareholders' Equi

Statement of Shareholders' Equity (Statement) - USD ($)	Total	Common Stock Including Additional Paid in Capital	Treasury Stock	Additional Paid-in Capital	Retained Earnings	AOCI Attributable to Parent	Common Stock
Common Stock, Shares, Outstanding		19,586,000	226,000
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	$ 267,602,000	$ 196,000	$ (8,041,000)	$ 231,048,000	$ 40,982,000	$ 3,417,000
Net Income (Loss) Attributable to Parent	14,832,000				14,832,000
APIC, Share-based Payment Arrangement, Restricted Stock Unit, Increase for Cost Recognition	2,991,000			2,991,000
Restricted Stock, Value, Shares Issued Net of Tax Withholdings	(3,090,000)		$ 4,951,000	(8,041,000)
Restricted Stock, Shares Issued Net of Shares for Tax Withholdings			(138,000)
Dividends, Cash	2,905,000				(2,905,000)
Dividend, Share-based Payment Arrangement, Cash	$ 167,000				(167,000)
Common Stock, Dividends, Per Share, Declared	$ 0.15
Other Comprehensive Income (Loss), Net of Tax	$ (693,000)					(693,000)
Net Income (Loss) Attributable to Parent	60,095,000
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	58,746,000
Other Comprehensive Income (Loss), Net of Tax	(1,349,000)
Common Stock, Shares, Outstanding		19,586,000	88,000
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	278,570,000	$ 196,000	$ (3,090,000)	225,998,000	52,742,000	2,724,000
Net Income (Loss) Attributable to Parent	20,765,000				20,765,000
APIC, Share-based Payment Arrangement, Restricted Stock Unit, Increase for Cost Recognition	2,861,000			2,861,000
Restricted Stock, Value, Shares Issued Net of Tax Withholdings	0		$ 808,000	(808,000)
Restricted Stock, Shares Issued Net of Shares for Tax Withholdings			(23,000)
Dividends, Cash	2,926,000				(2,926,000)
Dividend, Share-based Payment Arrangement, Cash	$ 67,000				(67,000)
Common Stock, Dividends, Per Share, Declared	$ 0.15
Other Comprehensive Income (Loss), Net of Tax	$ 5,000					5,000
Stock Issued During Period, Shares, Treasury Stock Reissued			(9,000)
Stock Issued During Period, Value, Treasury Stock Reissued	345,000		$ 280,000	65,000
Common Stock, Shares, Outstanding		19,586,000	56,000
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	299,553,000	$ 196,000	$ (2,002,000)	228,116,000	70,514,000	2,729,000
Net Income (Loss) Attributable to Parent	24,498,000				24,498,000
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	23,837,000
APIC, Share-based Payment Arrangement, Restricted Stock Unit, Increase for Cost Recognition	2,820,000			2,820,000
Stock Issued During Period, Value, New Issues	0			(1,821,000)			$ 0
Stock Issued During Period, Shares, New Issues							11,000
Restricted Stock, Value, Shares Issued Net of Tax Withholdings			$ 1,821,000
Restricted Stock, Shares Issued Net of Shares for Tax Withholdings			(51,000)
Dividends, Cash	2,939,000				(2,939,000)
Dividend, Share-based Payment Arrangement, Cash	$ 15,000				(15,000)
Common Stock, Dividends, Per Share, Declared	$ 0.15
Other Comprehensive Income (Loss), Net of Tax	$ (661,000)					(661,000)
Common Stock, Shares, Outstanding		19,597,000	5,000
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	$ 323,256,000	$ 196,000	$ (181,000)	229,115,000	92,058,000	2,068,000
Common Stock, Shares, Outstanding	19,591,527	19,597,000	5,000
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	$ 336,020,000	$ 196,000	$ (191,000)	233,163,000	101,177,000	1,675,000
Net Income (Loss) Attributable to Parent	18,467,000				18,467,000
APIC, Share-based Payment Arrangement, Restricted Stock Unit, Increase for Cost Recognition	3,698,000			3,698,000
Stock Issued During Period, Value, New Issues	(3,219,000)			(3,220,000)			$ 1,000
Stock Issued During Period, Shares, New Issues							126,000
Dividends, Cash	2,940,000				(2,940,000)
Dividend, Share-based Payment Arrangement, Cash	$ 179,000				(179,000)
Common Stock, Dividends, Per Share, Declared	$ 0.15
Other Comprehensive Income (Loss), Net of Tax	$ (1,082,000)					(1,082,000)
Net Income (Loss) Attributable to Parent	63,442,000
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	49,382,000
Other Comprehensive Income (Loss), Net of Tax	(14,060,000)
Common Stock, Shares, Outstanding		19,723,000	5,000
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	350,765,000	$ 197,000	$ (191,000)	233,641,000	116,525,000	593,000
Net Income (Loss) Attributable to Parent	24,149,000				24,149,000
APIC, Share-based Payment Arrangement, Restricted Stock Unit, Increase for Cost Recognition	3,784,000			3,784,000
Stock Issued During Period, Value, New Issues	404,000			404,000			$ 0
Stock Issued During Period, Shares, New Issues							19,000
Dividends, Cash	2,957,000				(2,957,000)
Dividend, Share-based Payment Arrangement, Cash	$ 147,000				(147,000)
Common Stock, Dividends, Per Share, Declared	$ 0.15
Other Comprehensive Income (Loss), Net of Tax	$ (7,524,000)					(7,524,000)
Common Stock, Shares, Outstanding		19,742,000	5,000
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	368,474,000	$ 197,000	$ (191,000)	237,829,000	137,570,000	(6,931,000)
Net Income (Loss) Attributable to Parent	20,826,000				20,826,000
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	15,372,000
APIC, Share-based Payment Arrangement, Restricted Stock Unit, Increase for Cost Recognition	3,805,000			3,805,000
Stock Issued During Period, Value, New Issues	0			(2,000)			$ 2,000
Stock Issued During Period, Shares, New Issues							124,000
Dividends, Cash	2,980,000				(2,980,000)
Dividend, Share-based Payment Arrangement, Cash	$ 140,000				(140,000)
Common Stock, Dividends, Per Share, Declared	$ 0.15
Other Comprehensive Income (Loss), Net of Tax	$ (5,454,000)					(5,454,000)
Common Stock, Shares, Outstanding	19,860,628	19,866,000	5,000
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	$ 384,531,000	$ 199,000	$ (191,000)	$ 241,632,000	$ 155,276,000	$ (12,385,000)

Statement of Cash Flows (Statem

Statement of Cash Flows (Statement) - USD ($)	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Statement of Cash Flows [Abstract]
Net Income (Loss) Attributable to Parent	$ 63,442,000	$ 60,095,000
Depreciation, Depletion and Amortization	7,824,000	16,576,000
Deferred Income Tax Expense (Benefit)	(976,000)	(1,486,000)
Share-based Payment Arrangement, Noncash Expense	11,691,000	8,672,000
Accretion Expense	820,000	363,000
Marketable Securities, Gain (Loss)	(113,000)	(1,000)
Gain (Loss) on Disposition of Assets	376,000	127,000
Increase (Decrease) in Accounts Receivable	(64,753,000)	(84,877,000)
Increase (Decrease) in Accounts Payable	(3,250,000)	2,931,000
Increase (Decrease) in Accrued Liabilities	(32,414,000)	89,405,000
Restructuring Reserve, Accrual Adjustment	0	(5,024,000)
Increase (Decrease) in Deferred Revenue	(5,913,000)	6,453,000
Increase (Decrease) in Income Taxes Payable, Net of Income Taxes Receivable	(5,661,000)	14,937,000
Increase (Decrease) in Obligation, Pension Benefits	3,476,000	1,443,000
Increase (Decrease) in Prepaid Expense	(6,637,000)	(7,724,000)
Increase (Decrease) in Other Operating Assets and Liabilities, Net	(8,960,000)	(37,114,000)
Net Cash Provided by (Used in) Operating Activities	(41,048,000)	64,776,000
Payments to Acquire Businesses, Gross	0	(31,969,000)
Payments to Acquire Property, Plant, and Equipment	(8,176,000)	(3,902,000)
Payments to Acquire Available-for-sale Securities	(186,097,000)	(1,997,000)
Proceeds from Sale of Debt Securities, Available-for-sale	1,216,000	20,653,000
Net Cash Provided by (Used in) Investing Activities	(193,057,000)	(17,215,000)
Payments of Dividends	(9,343,000)	(8,927,000)
Payment, Tax Withholding, Share-based Payment Arrangement	(3,219,000)	(3,090,000)
Net Cash Provided by (Used in) Financing Activities	(12,562,000)	(12,017,000)
Effect of Exchange Rate on Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	(23,082,000)	(3,707,000)
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect	(269,749,000)	31,837,000
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	275,510,000	348,326,000
Payments to Acquire Property, Plant, and Equipment	8,176,000	3,902,000
Payments to Acquire Available-for-sale Securities	186,097,000	1,997,000
Net Cash Provided by (Used in) Investing Activities	(193,057,000)	(17,215,000)
Payments of Dividends	9,343,000	8,927,000
Payment, Tax Withholding, Share-based Payment Arrangement	3,219,000	3,090,000
Net Cash Provided by (Used in) Financing Activities	(12,562,000)	(12,017,000)
Effect of Exchange Rate on Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	(23,082,000)	(3,707,000)
Net Income (Loss) Attributable to Parent	63,442,000	60,095,000
Depreciation, Depletion and Amortization	7,824,000	16,576,000
Deferred Income Tax Expense (Benefit)	(976,000)	(1,486,000)
Share-based Payment Arrangement, Noncash Expense	11,691,000	8,672,000
Accretion Expense	820,000	363,000
Marketable Securities, Gain (Loss)	113,000	1,000
Gain (Loss) on Disposition of Assets	(376,000)	(127,000)
Increase (Decrease) in Accounts Receivable	64,753,000	84,877,000
Increase (Decrease) in Accounts Payable	(3,250,000)	2,931,000
Increase (Decrease) in Accrued Liabilities	(32,414,000)	89,405,000
Restructuring Reserve, Accrual Adjustment	0	(5,024,000)
Increase (Decrease) in Deferred Revenue	(5,913,000)	6,453,000
Increase (Decrease) in Income Taxes Payable, Net of Income Taxes Receivable	(5,661,000)	14,937,000
Increase (Decrease) in Obligation, Pension Benefits	3,476,000	1,443,000
Increase (Decrease) in Prepaid Expense	6,637,000	7,724,000
Increase (Decrease) in Other Operating Assets and Liabilities, Net	8,960,000	37,114,000
Net Cash Provided by (Used in) Operating Activities	(41,048,000)	64,776,000
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect	(269,749,000)	31,837,000
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	275,510,000	348,326,000
Proceeds from Sale of Debt Securities, Available-for-sale	1,216,000	20,653,000
Payments to Acquire Businesses, Gross	$ 0	$ 31,969,000

Statement of Financial Positi_2

Statement of Financial Position, Classified (Details) - USD ($)	Sep. 30, 2022	Dec. 31, 2021
Statement of Financial Position [Abstract]
Preferred Stock, Par or Stated Value Per Share	$ 0.01	$ 0.01
Preferred Stock, Shares Authorized	10,000,000	10,000,000
Preferred Stock, Shares Issued	0	0
Common Stock, Shares Authorized	100,000,000
Common Stock, Par or Stated Value Per Share	$ 0.01
Common Stock, Shares, Outstanding	19,860,628	19,591,527
Treasury Stock, Shares	5,080
Accounts Receivable, Allowance for Credit Loss, Current	$ 6,900,000	$ 5,666,000
Common Stock, Shares, Issued	19,865,708	19,596,607
Other Liabilities, Noncurrent	$ 4,250,000	$ 41,087,000
Liabilities, Noncurrent	170,118,000	236,084,000
Liabilities	688,722,000	770,778,000
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	384,531,000	336,020,000
Additional Paid in Capital, Common Stock	241,632,000	233,163,000
Accumulated Other Comprehensive Income (Loss), Net of Tax	(12,385,000)	1,675,000
Retained Earnings (Accumulated Deficit)	$ 155,276,000	$ 101,177,000

Organization, Consolidation and

Organization, Consolidation and Presentation of Financial Statements	9 Months Ended
	Sep. 30, 2022
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization, Consolidation and Presentation of Financial Statements Disclosure	The accompanying unaudited Condensed Consolidated Financial Statements of Heidrick & Struggles International, Inc. and subsidiaries (the "Company") have been prepared pursuant to the rules and regulations of the U.S. Securities and Exchange Commission ("SEC"). The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make estimates and assumptions that affect the reported amounts of assets, liabilities, revenue and expenses. Significant items subject to estimates and assumptions include revenue recognition, income taxes, interim effective tax rate 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. In the opinion of management, all adjustments necessary to fairly present the financial position of the Company at September 30, 2022 and December 31, 2021, the results of operations for the three and nine months ended September 30, 2022 and 2021 and its cash flows for the nine months ended September 30, 2022 and 2021 have been included and are of a normal, recurring nature except as otherwise disclosed. These financial statements and notes are to be read in conjunction with the Company’s Consolidated Financial Statements and Notes thereto included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2021, as filed with the SEC on February 28, 2022.

Accounting Policies

Accounting Policies	9 Months Ended
	Sep. 30, 2022
Accounting Policies [Abstract]
Basis of Presentation and Significant Accounting Policies	A complete listing of the Company’s significant accounting policies is discussed in Note 2, Summary of Significant Accounting Policies , in the Notes to Consolidated Financial Statements included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2021. 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 consists of payroll, employee benefits, stock-based compensation, other employee expenses and third-party professional fees associated with new product development. Marketable Securities The Company’s marketable securities consist of available-for-sale debt securities with original maturities exceeding three months. Restricted Cash The following table provides a reconciliation of the cash and cash equivalents between the Condensed Consolidated Balance Sheets and the Condensed Consolidated Statements of Cash Flows as of September 30, 2022 and 2021, and December 31, 2021 and 2020: September 30, December 31, 2022 2021 2021 2020 Cash and cash equivalents $ 275,468 $ 348,292 $ 545,225 $ 316,473 Restricted cash included within other non-current assets 42 34 34 16 Total cash, cash equivalents and restricted cash $ 275,510 $ 348,326 $ 545,259 $ 316,489 Earnings per Common Share Basic earnings per common share are computed by dividing net income by weighted average common shares outstanding for the period. 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 per share: Three Months Ended Nine Months Ended 2022 2021 2022 2021 Net income $ 20,826 $ 24,498 $ 63,442 $ 60,095 Weighted average shares outstanding: Basic 19,816 19,569 19,723 19,489 Effect of dilutive securities: Restricted stock units 462 524 646 584 Performance stock units 135 147 189 186 Diluted 20,413 20,240 20,558 20,259 Basic earnings per share $ 1.05 $ 1.25 $ 3.22 $ 3.08 Diluted earnings per share $ 1.02 $ 1.21 $ 3.09 $ 2.97 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 the Company's Condensed 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. Recently Issued Financial Accounting Standards In March 2020, the Financial Accounting Standards Board issued Accounting Standards Update 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, 2022. The new guidance is not expected to have a material effect on the Company's financial statements.

Revenue from Contract with Cust

Revenue from Contract with Customer	9 Months Ended
	Sep. 30, 2022
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer	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 Accounting Standards Codification 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 the Company's 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 Condensed Consolidated Balance Sheets. Unbilled receivables: Unbilled receivables 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, Heidrick Consulting fees, and On-Demand Talent 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 the contract asset and liability balances from December 31, 2021 to September 30, 2022: September 30, December 31, Change Contract assets Unbilled receivables, net $ 15,455 $ 17,947 $ (2,492) Contract assets 21,316 18,995 2,321 Total contract assets 36,771 36,942 (171) Contract liabilities Deferred revenue $ 43,547 $ 51,404 $ (7,857) During the nine months ended September 30, 2022, the Company recognized revenue of $44.3 million that was included in the contract liabilities balance at the beginning of the period. The amount of revenue recognized during the nine months ended September 30, 2022 from performance obligations partially satisfied in previous periods as a result of changes in the estimates of variable consideration was $14.9 million. Each of the Company's contracts has an expected duration of one year or less.

Credit Losses

Credit Losses	9 Months Ended
	Sep. 30, 2022
Credit Loss [Abstract]
Loans, Notes, Trade and Other Receivables Disclosure	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 clients' 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 clients that have a higher probability of default. The Company’s monitoring activities include timely account reconciliation, dispute resolution, payment confirmation, consideration of clients' 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: Balance at December 31, 2021 $ 5,666 Provision for credit losses 6,129 Write-offs (4,649) Foreign currency translation (246) Balance at September 30, 2022 $ 6,900 The Company had zero available for sale debt securities in an unrealized loss position at September 30, 2022 and December 31, 2021.

Property, Plant, and Equipment

Property, Plant, and Equipment	9 Months Ended
	Sep. 30, 2022
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment Disclosure	The components of the Company’s property and equipment are as follows: September 30, December 31, Leasehold improvements $ 40,114 $ 42,252 Office furniture, fixtures and equipment 13,636 14,933 Computer equipment and software 28,306 24,293 Property and equipment, gross 82,056 81,478 Accumulated depreciation (52,739) (54,393) Property and equipment, net $ 29,317 $ 27,085 Depreciation expense for each of the three months ended September 30, 2022 and 2021 was $1.8 million. Depreciation expense for the nine months ended September 30, 2022 and 2021 was $5.4 million and $5.3 million, respectively.

Leases, Codification Topic 842

Leases, Codification Topic 842	9 Months Ended
	Sep. 30, 2022
Leases [Abstract]
Lessee, Operating 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 of the lease 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 10.8 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 the useful life, approximately $8.7 million and $1.2 million of right-of-use asset amortization was accelerated and recorded in Restructuring charges in the Condensed Consolidated Statements of Comprehensive Income and Depreciation and amortization in the Condensed Consolidated Statements of Cash Flows during the three and nine months ended September 30, 2021, respectively. 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 for the three and nine months ended September 30, 2021. Equipment leases, which are comprised of vehicle and office equipment leases, have remaining terms that range from less than one year to 4.8 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 the Condensed Consolidated Statements of Comprehensive Income were as follows: Three Months Ended Nine Months Ended 2022 2021 2022 2021 Operating lease cost $ 4,124 $ 4,682 $ 12,967 $ 14,457 Variable lease cost 1,760 $ 1,480 4,393 3,785 Total lease cost $ 5,884 $ 6,162 $ 17,360 $ 18,242 Supplemental cash flow information related to the Company's operating leases is as follows for the nine months ended September 30: 2022 2021 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 13,572 $ 38,387 Right-of-use assets obtained in exchange for lease obligations: Operating leases $ 9,059 $ 4,286 The weighted average remaining lease term and weighted average discount rate for operating leases as of September 30, are as follows: 2022 2021 Weighted Average Remaining Lease Term Operating leases 6.5 years 6.5 years Weighted Average Discount Rate Operating leases 3.31 % 3.26 % The future maturities of the Company's operating lease liabilities as of September 30, 2022, for the years ended December 31 are as follows: Operating Lease Maturity 2022 $ 3,208 2023 18,466 2024 17,372 2025 10,399 2026 8,934 Thereafter 29,147 Total lease payments 87,526 Less: Interest (9,276) Present value of lease liabilities $ 78,250

Fair Value Measures and Disclos

Fair Value Measures and Disclosures	9 Months Ended
	Sep. 30, 2022
Fair Value Disclosures [Abstract]
Investment	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 (loss) in the Condensed Consolidated Balance Sheets until realized. The Company's cash, cash equivalents, and marketable securities by significant investment category are as follows: Fair Value Balance Sheet Classification Amortized Cost Unrealized Gains Fair Value Cash and Cash Equivalents Marketable Securities Balance at September 30, 2022 Cash $ 163,244 $ — Level 1 (1) : Money market funds 46,825 — U.S. Treasury securities $ 245,898 $ 8 $ 245,906 65,399 180,507 Total Level 1 245,898 8 245,906 112,224 180,507 Total $ 245,898 $ 8 $ 245,906 $ 275,468 $ 180,507 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 $28.0 million and $22.9 million as of September 30, 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: 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 September 30, 2022 Measured on a recurring basis: Level 1 (1) : U.S. non-qualified deferred compensation plan $ 31,728 $ — $ — $ 31,728 $ — $ — Level 2 (2) : Retirement and pension plan assets 12,110 1,149 10,961 — — — Pension benefit obligation (16,891) — — — (1,149) (15,742) Total Level 2 (4,781) 1,149 10,961 — (1,149) (15,742) Total $ 26,947 $ 1,149 $ 10,961 $ 31,728 $ (1,149) $ (15,742) 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 and Compensation The former owners of the Company's acquired businesses are eligible to receive contingent consideration or additional cash compensation 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 nine months ended September 30, 2022: Earnout Contingent Compensation Balance at December 31, 2021 $ (35,654) $ (4,141) Earnout accretion (820) — Compensation expense — (2,971) Fair value adjustment 507 — Foreign currency translation — 85 Balance at September 30, 2022 $ (35,967) $ (7,027) Earnout accruals of $36.0 million and zero were recorded within Other current liabilities as of September 30, 2022 and December 31, 2021, respectively, and earnout accruals of zero and $35.7 million were recorded within Other non-current liabilities as of September 30, 2022 and December 31, 2021, respectively. Contingent compensation accruals of $1.1 million and $5.9 million are recorded within current Accrued salaries and benefits and non-current Accrued salaries and benefits , respectively, at September 30, 2022. Contingent compensation accruals of $4.1 million are recorded within non-current Accrued salaries and benefits at December 31, 2021.

Goodwill and Other Intangible A

Goodwill and Other Intangible Assets	9 Months Ended
	Sep. 30, 2022
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Intangible Assets Disclosure	Goodwill The Company's goodwill by segment is as follows: September 30, December 31, Executive Search Americas $ 91,212 $ 91,463 Europe 1,328 1,532 Total Executive Search 92,540 92,995 On-Demand Talent 45,529 45,529 Total goodwill $ 138,069 $ 138,524 Changes in the carrying amount of goodwill by segment for the nine months ended September 30, 2022, are as follows: Executive Search On-Demand Talent Americas Europe Asia Pacific Total Goodwill $ 91,463 $ 26,007 $ 8,495 $ 45,529 $ 171,494 Accumulated impairment losses — (24,475) (8,495) — (32,970) Balance at December 31, 2021 91,463 1,532 — 45,529 138,524 Foreign currency translation (251) (204) — — (455) Goodwill 91,212 25,803 8,495 45,529 171,039 Accumulated impairment losses — (24,475) (8,495) — (32,970) Balance at September 30, 2022 $ 91,212 $ 1,328 $ — $ 45,529 $ 138,069 Other Intangible Assets, net The Company’s other intangible assets, net by segment, are as follows: September 30, December 31, Executive Search Americas $ 58 $ 103 Europe 241 463 Asia Pacific 18 33 Total Executive Search 317 599 On-Demand Talent 6,681 8,570 Total other intangible assets, net $ 6,998 $ 9,169 The carrying amount of amortizable intangible assets and the related accumulated amortization are as follows: Weighted September 30, 2022 December 31, 2021 Gross Carrying Amount Accumulated Amortization Net Carrying Amount Gross Carrying Amount Accumulated Amortization Net Carrying Amount Client relationships 10.7 $ 20,807 $ (16,022) $ 4,785 $ 22,127 $ (16,495) $ 5,632 Trade name 3.1 2,369 (1,711) 658 2,441 (1,237) 1,204 Software 3.0 3,110 (1,555) 1,555 3,110 (777) 2,333 Total intangible assets 8.3 $ 26,286 $ (19,288) $ 6,998 $ 27,678 $ (18,509) $ 9,169 Intangible asset amortization expense for each of the three months ended September 30, 2022 and 2021 was $0.8 million. Intangible asset amortization expense for the nine months ended September 30, 2022 and 2021 was $2.4 million and $1.8 million, respectively. The Company's estimated future amortization expense related to intangible assets as of September 30, 2022, for the following years ended December 31 is as follows: 2022 $ 685 2023 2,711 2024 1,146 2025 759 2026 527 Thereafter 1,170 Total $ 6,998

Deferred Costs, Capitalized, Pr

Deferred Costs, Capitalized, Prepaid, and Other Assets	9 Months Ended
	Sep. 30, 2022
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Additional Financial Information Disclosure	The components of other current assets are as follows: September 30, December 31, Contract assets $ 36,771 $ 36,942 Other 4,807 4,507 Total other current assets $ 41,578 $ 41,449 The components of other current liabilities are as follows: September 30, December 31, Earnout liability $ 35,967 $ — Other 23,334 24,554 Total other current liabilities $ 59,301 $ 24,554

Debt

Debt	9 Months Ended
	Sep. 30, 2022
Debt Disclosure [Abstract]
Debt Disclosure	On July 13, 2021, the Company entered into a First Amendment to the 2018 Credit Agreement (the "Credit Agreement"). The Credit Agreement 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 Credit Agreement matures on July 13, 2026, extended from October 26, 2023 as set forth in the original agreement. Borrowings under the Credit Agreement 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 Credit Agreement are guaranteed by certain of the Company’s subsidiaries. As of September 30, 2022 and December 31, 2021, the Company had no outstanding borrowings. The Company was in compliance with the financial and other covenants under the Credit Agreement and no event of default existed.

Restructuring and Related Activ

Restructuring and Related Activities	9 Months Ended
	Sep. 30, 2022
Restructuring and Related Activities [Abstract]
Restructuring and Related Activities Disclosure	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 of the Company's real estate footprint. The Company did not incur any charges under the 2020 Plan during the three and nine months ended September 30, 2022 and does not anticipate incurring any future charges under the 2020 Plan. Restructuring charges (reversals) for the three months ended September 30, 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 $ 4 $ 9 $ — $ — $ 94 $ 107 Office related (2,891) — — (279) (199) (3,369) Total $ (2,887) $ 9 $ — $ (279) $ (105) $ (3,262) Restructuring charges (reversals) for the nine months ended September 30, 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 incurred through September 30, 2022 under the 2020 Plan, which are solely comprised of prior period charges, by type of charge and operating 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 three and nine months ended September 30, 2021. Changes in the restructuring accrual for the nine months ended September 30, 2022 were as follows: Employee Related Accrual balance at December 31, 2021 8,394 Cash payments (4,843) Non-cash write-offs (34) Exchange rate fluctuations (157) Accrual balance at September 30, 2022 $ 3,360 Restructuring accruals are recorded within current Accrued salaries and benefits as of September 30, 2022.

Income Taxes

Income Taxes	9 Months Ended
	Sep. 30, 2022
Income Tax Disclosure [Abstract]
Income Tax Disclosure	The Company reported income before taxes of $29.5 million and an income tax provision of $8.7 million for the three months ended September 30, 2022. The Company reported income before taxes of $33.6 million and an income tax provision of $9.1 million for the three months ended September 30, 2021. The effective tax rates for the three months ended September 30, 2022 and 2021, were 29.5% and 27.0%, respectively. The effective tax rates for the three months ended September 30, 2022 and 2021 were each impacted by various permanent items and the jurisdictional mix of income.The Company reported income before taxes of $92.3 million and an income tax provision of $28.9 million for the nine months ended September 30, 2022. The Company reported income before taxes of $88.1 million and an income tax provision of $28.0 million for the nine months ended September 30, 2021. The effective tax rates for the nine months ended September 30, 2022 and 2021, were 31.3% and 31.8%, respectively. The effective tax rate for the nine months ended September 30, 2022 and 2021 were each impacted by various permanent items and the jurisdictional mix of income.

Comprehensive Text Block List

Comprehensive Text Block List	9 Months Ended
	Sep. 30, 2022
Text Block [Abstract]
Comprehensive Income (Loss) Note	The changes in Accumulated other comprehensive income (loss) (“AOCI”) by component for the nine months ended September 30, 2022 are as follows: Available- Foreign Pension AOCI Balance at December 31, 2021 $ — $ 4,294 $ (2,619) $ 1,675 Other comprehensive income (loss) before reclassification, net of tax 8 (14,068) — (14,060) Balance at September 30, 2022 $ 8 $ (9,774) $ (2,619) $ (12,385)

Segment Reporting

Segment Reporting	9 Months Ended
	Sep. 30, 2022
Segment Reporting [Abstract]
Segment Reporting Disclosure	The Company 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, more appropriately reflect its core operations. Revenue and operating income by segment are as follows: Three Months Ended Nine Months Ended 2022 2021 2022 2021 Revenue Executive Search Americas $ 143,747 $ 148,844 $ 482,320 $ 412,740 Europe 41,141 42,676 139,017 125,228 Asia Pacific 27,919 30,126 87,928 87,429 Total Executive Search 212,807 221,646 709,265 625,397 On-Demand Talent 23,247 24,287 68,981 43,006 Heidrick Consulting 19,131 17,892 59,501 49,059 Revenue before reimbursements (net revenue) 255,185 263,825 837,747 717,462 Reimbursements 3,086 1,490 7,170 3,819 Total revenue $ 258,271 $ 265,315 $ 844,917 $ 721,281 Three Months Ended Nine Months Ended 2022 2021 2022 2021 Operating income (loss) Executive Search Americas (1) $ 39,741 $ 38,972 $ 123,842 $ 99,822 Europe (2) 5,652 4,795 15,661 13,314 Asia Pacific (3) 4,503 4,712 13,469 13,241 Total Executive Search 49,896 48,479 152,972 126,377 On-Demand Talent (4) (276) 881 (1,207) 1,034 Heidrick Consulting (5) (2,000) (2,556) (4,492) (10,897) Total segment operating income 47,620 46,804 147,273 116,514 Research and Development (5,400) — (14,347) — Global Operations Support (6) (13,898) (13,462) (40,506) (34,858) Total operating income $ 28,322 $ 33,342 $ 92,420 $ 81,656 (1) Includes restructuring reversal of $2.9 million and restructuring charges of $3.9 million for the three and nine months ended September 30, 2021, respectively. (2) Includes restructuring charges of less than $0.1 million and a restructuring reversal of $0.1 million for the three and nine months ended September 30, 2021, respectively. (3) Includes restructuring reversal of $0.1 million for the nine months ended September 30, 2021. (4) Includes a fair value adjustment to reduce the On-Demand Talent earnout by $0.5 million for the three and nine months ended September 30, 2022. (5) Includes restructuring reversal of $0.3 million and restructuring charges of $0.4 million for the three and nine months ended September 30, 2021, respectively. (6) Includes restructuring reversals of $0.1 million and $0.2 million for the three and nine months ended September 30, 2021, respectively.

Guarantees

Guarantees	9 Months Ended
	Sep. 30, 2022
Guarantees and Product Warranties [Abstract]
Guarantees	The Company has utilized letters of credit to support certain obligations, primarily for its office lease agreements. 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 to use cash to fulfill the obligation if there is a default on a 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 $4.2 million as of September 30, 2022. The Company has not accrued for these arrangements as no event of default exists or is expected to exist.

Commitment and Contingencies

Commitment and Contingencies	9 Months Ended
	Sep. 30, 2022
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies Disclosure	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 in part 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.

Accounting Policies (Policies)

Accounting Policies (Policies)	9 Months Ended
	Sep. 30, 2022
Accounting Policies [Abstract]
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.
Revenue from Contract with Customer	Revenue Recognition See Note 3 , Revenue.
Research and Development Expense, Policy	Research and DevelopmentResearch and development consists of payroll, employee benefits, stock-based compensation, other employee expenses and third-party professional fees associated with new product development.
Earnings Per Share, Policy	Earnings per Common Share Basic earnings per common share are computed by dividing net income by weighted average common shares outstanding for the period. 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 per share: Three Months Ended Nine Months Ended 2022 2021 2022 2021 Net income $ 20,826 $ 24,498 $ 63,442 $ 60,095 Weighted average shares outstanding: Basic 19,816 19,569 19,723 19,489 Effect of dilutive securities: Restricted stock units 462 524 646 584 Performance stock units 135 147 189 186 Diluted 20,413 20,240 20,558 20,259 Basic earnings per share $ 1.05 $ 1.25 $ 3.22 $ 3.08 Diluted earnings per share $ 1.02 $ 1.21 $ 3.09 $ 2.97
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 the Company's Condensed 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.
New Accounting Pronouncements, Policy	Recently Issued Financial Accounting Standards In March 2020, the Financial Accounting Standards Board issued Accounting Standards Update 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, 2022. The new guidance is not expected to have a material effect on the Company's financial statements.
Marketable Securities, Policy	Marketable Securities The Company’s marketable securities consist of available-for-sale debt securities with original maturities exceeding three months.
Cash and Cash Equivalents, Restricted Cash and Cash Equivalents, Policy	Restricted Cash The following table provides a reconciliation of the cash and cash equivalents between the Condensed Consolidated Balance Sheets and the Condensed Consolidated Statements of Cash Flows as of September 30, 2022 and 2021, and December 31, 2021 and 2020: September 30, December 31, 2022 2021 2021 2020 Cash and cash equivalents $ 275,468 $ 348,292 $ 545,225 $ 316,473 Restricted cash included within other non-current assets 42 34 34 16 Total cash, cash equivalents and restricted cash $ 275,510 $ 348,326 $ 545,259 $ 316,489

Accounting Policies (Tables)

Accounting Policies (Tables)	9 Months Ended
	Sep. 30, 2022
Accounting Policies [Abstract]
Schedule of Cash and Cash Equivalents	The following table provides a reconciliation of the cash and cash equivalents between the Condensed Consolidated Balance Sheets and the Condensed Consolidated Statements of Cash Flows as of September 30, 2022 and 2021, and December 31, 2021 and 2020: September 30, December 31, 2022 2021 2021 2020 Cash and cash equivalents $ 275,468 $ 348,292 $ 545,225 $ 316,473 Restricted cash included within other non-current assets 42 34 34 16 Total cash, cash equivalents and restricted cash $ 275,510 $ 348,326 $ 545,259 $ 316,489
Restrictions on Cash and Cash Equivalents	The following table provides a reconciliation of the cash and cash equivalents between the Condensed Consolidated Balance Sheets and the Condensed Consolidated Statements of Cash Flows as of September 30, 2022 and 2021, and December 31, 2021 and 2020: September 30, December 31, 2022 2021 2021 2020 Cash and cash equivalents $ 275,468 $ 348,292 $ 545,225 $ 316,473 Restricted cash included within other non-current assets 42 34 34 16 Total cash, cash equivalents and restricted cash $ 275,510 $ 348,326 $ 545,259 $ 316,489
Schedule of Earnings Per Share, Basic and Diluted	The following table sets forth the computation of basic and diluted earnings per share: Three Months Ended Nine Months Ended 2022 2021 2022 2021 Net income $ 20,826 $ 24,498 $ 63,442 $ 60,095 Weighted average shares outstanding: Basic 19,816 19,569 19,723 19,489 Effect of dilutive securities: Restricted stock units 462 524 646 584 Performance stock units 135 147 189 186 Diluted 20,413 20,240 20,558 20,259 Basic earnings per share $ 1.05 $ 1.25 $ 3.22 $ 3.08 Diluted earnings per share $ 1.02 $ 1.21 $ 3.09 $ 2.97

Revenue from Contract with Cu_2

Revenue from Contract with Customer (Tables)	9 Months Ended
	Sep. 30, 2022
Revenue from Contract with Customer [Abstract]
Contract with Customer, Contract Asset, Contract Liability, and Receivable	The following table outlines the changes in the contract asset and liability balances from December 31, 2021 to September 30, 2022: September 30, December 31, Change Contract assets Unbilled receivables, net $ 15,455 $ 17,947 $ (2,492) Contract assets 21,316 18,995 2,321 Total contract assets 36,771 36,942 (171) Contract liabilities Deferred revenue $ 43,547 $ 51,404 $ (7,857)

Credit Losses (Tables)

Credit Losses (Tables)	9 Months Ended
	Sep. 30, 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: Balance at December 31, 2021 $ 5,666 Provision for credit losses 6,129 Write-offs (4,649) Foreign currency translation (246) Balance at September 30, 2022 $ 6,900

Property, Plant, and Equipment

Property, Plant, and Equipment (Tables)	9 Months Ended
	Sep. 30, 2022
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment	The components of the Company’s property and equipment are as follows: September 30, December 31, Leasehold improvements $ 40,114 $ 42,252 Office furniture, fixtures and equipment 13,636 14,933 Computer equipment and software 28,306 24,293 Property and equipment, gross 82,056 81,478 Accumulated depreciation (52,739) (54,393) Property and equipment, net $ 29,317 $ 27,085

Leases, Codification Topic 842

Leases, Codification Topic 842 (Tables)	9 Months Ended
	Sep. 30, 2022
Leases [Abstract]
Lease, Cost	Lease cost components included within General and administrative expenses in the Condensed Consolidated Statements of Comprehensive Income were as follows: Three Months Ended Nine Months Ended 2022 2021 2022 2021 Operating lease cost $ 4,124 $ 4,682 $ 12,967 $ 14,457 Variable lease cost 1,760 $ 1,480 4,393 3,785 Total lease cost $ 5,884 $ 6,162 $ 17,360 $ 18,242
Schedule of Cash Flow Information Related to Operating Leases	Supplemental cash flow information related to the Company's operating leases is as follows for the nine months ended September 30: 2022 2021 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 13,572 $ 38,387 Right-of-use assets obtained in exchange for lease obligations: Operating leases $ 9,059 $ 4,286
Lessee Operating Lease Weighted Averages	The weighted average remaining lease term and weighted average discount rate for operating leases as of September 30, are as follows: 2022 2021 Weighted Average Remaining Lease Term Operating leases 6.5 years 6.5 years Weighted Average Discount Rate Operating leases 3.31 % 3.26 %
Lessee, Operating Lease, Liability, Maturity	The future maturities of the Company's operating lease liabilities as of September 30, 2022, for the years ended December 31 are as follows: Operating Lease Maturity 2022 $ 3,208 2023 18,466 2024 17,372 2025 10,399 2026 8,934 Thereafter 29,147 Total lease payments 87,526 Less: Interest (9,276) Present value of lease liabilities $ 78,250

Fair Value Measures and Discl_2

Fair Value Measures and Disclosures (Tables)	9 Months Ended
	Sep. 30, 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: Fair Value Balance Sheet Classification Amortized Cost Unrealized Gains Fair Value Cash and Cash Equivalents Marketable Securities Balance at September 30, 2022 Cash $ 163,244 $ — Level 1 (1) : Money market funds 46,825 — U.S. Treasury securities $ 245,898 $ 8 $ 245,906 65,399 180,507 Total Level 1 245,898 8 245,906 112,224 180,507 Total $ 245,898 $ 8 $ 245,906 $ 275,468 $ 180,507 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: 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 September 30, 2022 Measured on a recurring basis: Level 1 (1) : U.S. non-qualified deferred compensation plan $ 31,728 $ — $ — $ 31,728 $ — $ — Level 2 (2) : Retirement and pension plan assets 12,110 1,149 10,961 — — — Pension benefit obligation (16,891) — — — (1,149) (15,742) Total Level 2 (4,781) 1,149 10,961 — (1,149) (15,742) Total $ 26,947 $ 1,149 $ 10,961 $ 31,728 $ (1,149) $ (15,742) 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.
Investments and Other Noncurrent Assets	The following table provides a reconciliation of the beginning and ending balance of Level 3 liabilities for the nine months ended September 30, 2022: Earnout Contingent Compensation Balance at December 31, 2021 $ (35,654) $ (4,141) Earnout accretion (820) — Compensation expense — (2,971) Fair value adjustment 507 — Foreign currency translation — 85 Balance at September 30, 2022 $ (35,967) $ (7,027) Earnout accruals of $36.0 million and zero were recorded within Other current liabilities as of September 30, 2022 and December 31, 2021, respectively, and earnout accruals of zero and $35.7 million were recorded within Other non-current liabilities as of September 30, 2022 and December 31, 2021, respectively. Contingent compensation accruals of $1.1 million and $5.9 million are recorded within current Accrued salaries and benefits and non-current Accrued salaries and benefits , respectively, at September 30, 2022. Contingent compensation accruals of $4.1 million are recorded within non-current Accrued salaries and benefits at December 31, 2021.
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation	The following table provides a reconciliation of the beginning and ending balance of Level 3 liabilities for the nine months ended September 30, 2022: Earnout Contingent Compensation Balance at December 31, 2021 $ (35,654) $ (4,141) Earnout accretion (820) — Compensation expense — (2,971) Fair value adjustment 507 — Foreign currency translation — 85 Balance at September 30, 2022 $ (35,967) $ (7,027)

Goodwill and Other Intangible_2

Goodwill and Other Intangible Assets (Tables)	9 Months Ended
	Sep. 30, 2022
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Intangible Assets and Goodwill	The Company's goodwill by segment is as follows: September 30, December 31, Executive Search Americas $ 91,212 $ 91,463 Europe 1,328 1,532 Total Executive Search 92,540 92,995 On-Demand Talent 45,529 45,529 Total goodwill $ 138,069 $ 138,524
Schedule of Goodwill	Changes in the carrying amount of goodwill by segment for the nine months ended September 30, 2022, are as follows: Executive Search On-Demand Talent Americas Europe Asia Pacific Total Goodwill $ 91,463 $ 26,007 $ 8,495 $ 45,529 $ 171,494 Accumulated impairment losses — (24,475) (8,495) — (32,970) Balance at December 31, 2021 91,463 1,532 — 45,529 138,524 Foreign currency translation (251) (204) — — (455) Goodwill 91,212 25,803 8,495 45,529 171,039 Accumulated impairment losses — (24,475) (8,495) — (32,970) Balance at September 30, 2022 $ 91,212 $ 1,328 $ — $ 45,529 $ 138,069
Schedule of Finite-Lived Intangible Assets	The Company’s other intangible assets, net by segment, are as follows: September 30, December 31, Executive Search Americas $ 58 $ 103 Europe 241 463 Asia Pacific 18 33 Total Executive Search 317 599 On-Demand Talent 6,681 8,570 Total other intangible assets, net $ 6,998 $ 9,169 The carrying amount of amortizable intangible assets and the related accumulated amortization are as follows: Weighted September 30, 2022 December 31, 2021 Gross Carrying Amount Accumulated Amortization Net Carrying Amount Gross Carrying Amount Accumulated Amortization Net Carrying Amount Client relationships 10.7 $ 20,807 $ (16,022) $ 4,785 $ 22,127 $ (16,495) $ 5,632 Trade name 3.1 2,369 (1,711) 658 2,441 (1,237) 1,204 Software 3.0 3,110 (1,555) 1,555 3,110 (777) 2,333 Total intangible assets 8.3 $ 26,286 $ (19,288) $ 6,998 $ 27,678 $ (18,509) $ 9,169
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense	The Company's estimated future amortization expense related to intangible assets as of September 30, 2022, for the following years ended December 31 is as follows: 2022 $ 685 2023 2,711 2024 1,146 2025 759 2026 527 Thereafter 1,170 Total $ 6,998

Deferred Costs, Capitalized, _2

Deferred Costs, Capitalized, Prepaid, and Other Assets (Tables)	9 Months Ended
	Sep. 30, 2022
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Schedule of Other Current Assets	The components of other current assets are as follows: September 30, December 31, Contract assets $ 36,771 $ 36,942 Other 4,807 4,507 Total other current assets $ 41,578 $ 41,449
Other Current Liabilities	The components of other current liabilities are as follows: September 30, December 31, Earnout liability $ 35,967 $ — Other 23,334 24,554 Total other current liabilities $ 59,301 $ 24,554

Compensation Related Costs, Sha

Compensation Related Costs, Share Based Payments (Tables)	9 Months Ended
	Sep. 30, 2022
Share-Based Payment Arrangement [Abstract]
Share-based Payment Arrangement, Expensed and Capitalized, Amount	A summary of information with respect to stock-based compensation is as follows: Three Months Ended Nine Months Ended 2022 2021 2022 2021 Salaries and benefits (1) $ 3,535 $ 3,321 $ 7,713 $ 14,552 General and administrative expenses 405 — 810 345 Income tax benefit related to stock-based compensation included in net income 1,072 886 2,320 3,976
Share-based Payment Arrangement, Restricted Stock Unit, Activity	Restricted stock unit activity for the nine months ended September 30, 2022 is as follows: Number of Weighted- Outstanding on December 31, 2021 727,651 $ 31.32 Granted 287,954 34.05 Vested and converted to common stock (272,601) 32.25 Forfeited (9,703) 35.68 Outstanding on September 30, 2022 733,301 $ 31.99
Share-based Payment Arrangement, Performance Shares, Outstanding Activity	Number of Weighted- 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 September 30, 2022 260,452 $ 40.02
Share-Based Compensation, Phantom Shares Award Outstanding Activity	Phantom stock unit activity for the nine months ended September 30, 2022 is as follows: Number of Outstanding on December 31, 2021 348,863 Granted 95,675 Vested (119,333) Forfeited — Outstanding on September 30, 2022 325,205

Restructuring and Related Act_2

Restructuring and Related Activities (Tables)	9 Months Ended
	Sep. 30, 2022
Restructuring and Related Activities [Abstract]
Restructuring and Related Costs	Changes in the restructuring accrual for the nine months ended September 30, 2022 were as follows: Employee Related Accrual balance at December 31, 2021 8,394 Cash payments (4,843) Non-cash write-offs (34) Exchange rate fluctuations (157) Accrual balance at September 30, 2022 $ 3,360

Comprehensive Text Block List (

Comprehensive Text Block List (Tables)	9 Months Ended
	Sep. 30, 2022
Text Block [Abstract]
Schedule of Accumulated Other Comprehensive Income (Loss)	The changes in Accumulated other comprehensive income (loss) (“AOCI”) by component for the nine months ended September 30, 2022 are as follows: Available- Foreign Pension AOCI Balance at December 31, 2021 $ — $ 4,294 $ (2,619) $ 1,675 Other comprehensive income (loss) before reclassification, net of tax 8 (14,068) — (14,060) Balance at September 30, 2022 $ 8 $ (9,774) $ (2,619) $ (12,385)

Segment Reporting (Tables)

Segment Reporting (Tables)	9 Months Ended
	Sep. 30, 2022
Segment Reporting [Abstract]
Schedule of Segment Reporting Information, by Segment	Revenue and operating income by segment are as follows: Three Months Ended Nine Months Ended 2022 2021 2022 2021 Revenue Executive Search Americas $ 143,747 $ 148,844 $ 482,320 $ 412,740 Europe 41,141 42,676 139,017 125,228 Asia Pacific 27,919 30,126 87,928 87,429 Total Executive Search 212,807 221,646 709,265 625,397 On-Demand Talent 23,247 24,287 68,981 43,006 Heidrick Consulting 19,131 17,892 59,501 49,059 Revenue before reimbursements (net revenue) 255,185 263,825 837,747 717,462 Reimbursements 3,086 1,490 7,170 3,819 Total revenue $ 258,271 $ 265,315 $ 844,917 $ 721,281 Three Months Ended Nine Months Ended 2022 2021 2022 2021 Operating income (loss) Executive Search Americas (1) $ 39,741 $ 38,972 $ 123,842 $ 99,822 Europe (2) 5,652 4,795 15,661 13,314 Asia Pacific (3) 4,503 4,712 13,469 13,241 Total Executive Search 49,896 48,479 152,972 126,377 On-Demand Talent (4) (276) 881 (1,207) 1,034 Heidrick Consulting (5) (2,000) (2,556) (4,492) (10,897) Total segment operating income 47,620 46,804 147,273 116,514 Research and Development (5,400) — (14,347) — Global Operations Support (6) (13,898) (13,462) (40,506) (34,858) Total operating income $ 28,322 $ 33,342 $ 92,420 $ 81,656 (1) Includes restructuring reversal of $2.9 million and restructuring charges of $3.9 million for the three and nine months ended September 30, 2021, respectively. (2) Includes restructuring charges of less than $0.1 million and a restructuring reversal of $0.1 million for the three and nine months ended September 30, 2021, respectively. (3) Includes restructuring reversal of $0.1 million for the nine months ended September 30, 2021. (4) Includes a fair value adjustment to reduce the On-Demand Talent earnout by $0.5 million for the three and nine months ended September 30, 2022. (5) Includes restructuring reversal of $0.3 million and restructuring charges of $0.4 million for the three and nine months ended September 30, 2021, respectively. (6) Includes restructuring reversals of $0.1 million and $0.2 million for the three and nine months ended September 30, 2021, respectively.

Accounting Policies (Details)

Accounting Policies (Details) - USD ($)	3 Months Ended						9 Months Ended
	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021	Dec. 31, 2020
Accounting Policies [Abstract]
Cash and Cash Equivalents, at Carrying Value	$ 275,468,000			$ 348,292,000			$ 275,468,000	$ 348,292,000	$ 545,225,000	$ 316,473,000
Cash and Cash Equivalents [Line Items]
Net Income (Loss) Attributable to Parent	$ 20,826,000	$ 24,149,000	$ 18,467,000	$ 24,498,000	$ 20,765,000	$ 14,832,000	$ 63,442,000	$ 60,095,000
Weighted Average Number of Shares Outstanding, Basic	19,816,000			19,569,000			19,723,000	19,489,000
Weighted Average Number of Shares Outstanding, Diluted	20,413,000			20,240,000			20,558,000	20,259,000
Earnings Per Share, Basic	$ 1.05			$ 1.25			$ 3.22	$ 3.08
Earnings Per Share, Diluted	$ 1.02			$ 1.21			$ 3.09	$ 2.97
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	$ 275,510,000			$ 348,326,000			$ 275,510,000	$ 348,326,000	545,259,000	316,489,000
Other Noncurrent Assets [Member]
Accounting Policies [Abstract]
Restricted Cash	42,000			34,000			42,000	34,000	34,000	16,000
Cash and Cash Equivalents [Line Items]
Restricted Cash	$ 42,000			$ 34,000			$ 42,000	$ 34,000	$ 34,000	$ 16,000
Restricted Stock Units (RSUs)
Cash and Cash Equivalents [Line Items]
Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements	462,000			524,000			646,000	584,000
Performance Shares
Cash and Cash Equivalents [Line Items]
Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements	135,000			147,000			189,000	186,000

Revenue from Contract with Cu_3

Revenue from Contract with Customer (Details) - USD ($)	9 Months Ended
	Sep. 30, 2022	Dec. 31, 2021
Revenue from Contract with Customer [Abstract]
Unbilled Contracts Receivable	$ 15,455,000	$ 17,947,000
Contract with Customer, Asset, after Allowance for Credit Loss	36,771,000	36,942,000
Deferred Revenue, Current	43,547,000	51,404,000
Deferred Revenue, Revenue Recognized	44,300,000
Contract with Customer, Performance Obligation Satisfied in Previous Period	14,900,000
Increase (Decrease) in Unbilled Contracts Receivable	(2,492,000)
Contract with Customer, Asset, before Allowance for Credit Loss	21,316,000	$ 18,995,000
Increase (Decrease) In Contract With Customer, After Allowance For Credit Loss	2,321,000
Increase (Decrease) in Contract with Customer, Asset	(171,000)
Deferred Revenue, Period Increase (Decrease)	$ (7,857,000)

Credit Losses (Details)

Credit Losses (Details) - USD ($)	3 Months Ended	9 Months Ended		12 Months Ended
	Sep. 30, 2022	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Credit Loss [Abstract]
Allowance for Doubtful Accounts, Premiums and Other Receivables	$ 6,900,000	$ 6,900,000		$ 5,666,000
Accounts Receivable, Credit Loss Expense (Reversal)		6,129,000
Accounts Receivable, Allowance for Credit Loss, Writeoff		(4,649,000)
Debt Securities, Available-for-sale [Line Items]
Allowance for Doubtful Accounts, Premiums and Other Receivables	6,900,000	6,900,000		5,666,000
Accounts Receivable, Credit Loss Expense (Reversal)		6,129,000
Accounts Receivable, Allowance for Credit Loss, Writeoff		4,649,000
Depreciation	1,800,000	5,400,000	$ 5,300,000
Debt Securities, Available-for-sale	$ 245,906,000	245,906,000
Debt Securities, Available-for-Sale, Unrealized Loss		0		0
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
Allowance For Doubtful Accounts, Foreign Currency Translation		(246,000)
Debt Securities, Available-for-Sale, Unrealized Loss		$ 0		$ 0

Property, Plant, and Equipmen_2

Property, Plant, and Equipment (Details) - USD ($)	3 Months Ended	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 82,056,000	$ 82,056,000		$ 81,478,000
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment	(52,739,000)	(52,739,000)		(54,393,000)
Property, Plant and Equipment, Net	29,317,000	29,317,000		27,085,000
Depreciation	1,800,000	5,400,000	$ 5,300,000
Leasehold Improvements
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	40,114,000	40,114,000		42,252,000
Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	13,636,000	13,636,000		14,933,000
Computer Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 28,306,000	$ 28,306,000		$ 24,293,000

Leases, Codification Topic 84_2

Leases, Codification Topic 842 (Details) - USD ($)	3 Months Ended		6 Months Ended	9 Months Ended		33 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Jun. 30, 2022	Sep. 30, 2022	Sep. 30, 2021	Jun. 30, 2022
Leases [Abstract]
Operating Lease, Expense	$ 4,124,000	$ 4,682,000		$ 12,967,000	$ 14,457,000
Variable Lease, Cost	1,760,000	1,480,000		4,393,000	3,785,000
Lease, Cost	$ 5,884,000	$ 6,162,000		17,360,000	18,242,000
Operating Lease, Payments				13,572,000	38,387,000
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability				$ 9,059,000	$ 4,286,000
Operating Lease, Weighted Average Remaining Lease Term	6 years 6 months	6 years 6 months		6 years 6 months	6 years 6 months
Operating Lease, Weighted Average Discount Rate, Percent	3.31%	3.26%		3.31%	3.26%
Lessee, Operating Lease, Liability, to be Paid, Remainder of Fiscal Year	$ 3,208,000			$ 3,208,000
Lessee, Operating Lease, Liability, to be Paid, Year Four	10,399,000			10,399,000
Lessee, Operating Lease, Liability, to be Paid, Year Five	8,934,000			8,934,000
Lessee, Operating Lease, Liability, to be Paid	87,526,000			87,526,000
Lessee, Operating Lease, Liability, Undiscounted Excess Amount	(9,276,000)			(9,276,000)
Operating Lease, Liability	78,250,000			78,250,000
Lessee, Lease, Description [Line Items]
Restructuring Charges	0	$ (3,262,000)		0	$ 3,792,000	$ 56,164,000
Lessee, Operating Lease, Liability, to be Paid, After Year Four	29,147,000			29,147,000
Early Surrender Agreement Payment				11,700,000
Lease Liability Associated with Surrendered Office			$ 17,400,000
Gain on Early Termination Agreement				5,700,000
Early Surrender Agreement Payment				11,700,000
Gain on Early Termination Agreement				5,700,000
Lease Liability Associated with Surrendered Office			$ 17,400,000
Lessee, Operating Lease, Liability, to be Paid, Year Two	18,466,000			18,466,000
Lessee, Operating Lease, Liability, to be Paid, Year Three	$ 17,372,000			$ 17,372,000
Office Lease
Lessee, Lease, Description [Line Items]
Restructuring Charges		$ 8,700,000			$ 1,200,000
Minimum [Member] | Office Leases [Member]
Leases [Abstract]
Lessee, Operating Lease, Term of Contract	1 year			1 year
Lessee, Lease, Description [Line Items]
Lessee, Operating Lease, Term of Contract	1 year			1 year
Minimum [Member] | Equipment Lease [Member]
Leases [Abstract]
Lessee, Operating Lease, Term of Contract	1 year			1 year
Lessee, Lease, Description [Line Items]
Lessee, Operating Lease, Term of Contract	1 year			1 year
Maximum [Member] | Office Leases [Member]
Leases [Abstract]
Lessee, Operating Lease, Term of Contract	10 years 9 months 18 days			10 years 9 months 18 days
Lessee, Lease, Description [Line Items]
Lessee, Operating Lease, Term of Contract	10 years 9 months 18 days			10 years 9 months 18 days
Maximum [Member] | Equipment Lease [Member]
Leases [Abstract]
Lessee, Operating Lease, Term of Contract	4 years 9 months 18 days			4 years 9 months 18 days
Lessee, Lease, Description [Line Items]
Lessee, Operating Lease, Term of Contract	4 years 9 months 18 days			4 years 9 months 18 days

Fair Value Measures and Discl_3

Fair Value Measures and Disclosures (Details) - USD ($)	Sep. 30, 2022	Dec. 31, 2021	Sep. 30, 2021	Dec. 31, 2020
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and Cash Equivalents, at Carrying Value	$ 275,468,000	$ 545,225,000	$ 348,292,000	$ 316,473,000
Debt Securities, Available-for-sale, Amortized Cost	245,898,000
Debt Securities, Available-for-sale	245,906,000
Marketable Securities	180,507,000
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	8,000
Fair Value, Net Asset (Liability)	26,947,000	30,505,000
Goodwill	138,069,000	138,524,000
Aggregate Cost Basis for Non-Qualified Deferred Compensation Plan	28,000,000	22,900,000
Goodwill, Gross	171,039,000	171,494,000
Goodwill, Impaired, Accumulated Impairment Loss	32,970,000	32,970,000
Investments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value, Net Asset (Liability)	31,728,000	36,051,000
Other Current Assets [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value, Net Asset (Liability)	1,149,000	1,333,000
Assets Designated for Retirement and Pension Plans [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value, Net Asset (Liability)	10,961,000	12,715,000
Other Current Liabilities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value, Net Asset (Liability)	(1,149,000)	(1,333,000)
Other Pension Plan [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value, Net Asset (Liability)	(15,742,000)	(18,261,000)
Fair Value, Inputs, Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and Cash Equivalents, at Carrying Value	112,224,000	279,992,000
Debt Securities, Available-for-sale, Amortized Cost	245,898,000
Debt Securities, Available-for-sale	245,906,000
Marketable Securities	180,507,000
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	8,000
Deferred Compensation Plan Assets	31,728,000	36,051,000
Fair Value, Inputs, Level 1 [Member] | Investments
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Deferred Compensation Plan Assets	31,728,000	36,051,000
Fair Value, Inputs, Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Defined Benefit Plan, Plan Assets, Amount	12,110,000	14,048,000
Defined Benefit Plan, Benefit Obligation	(16,891,000)	(19,594,000)
Fair Value, Net Asset (Liability)	(4,781,000)	(5,546,000)
Fair Value, Inputs, Level 2 [Member] | Other Current Assets [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Defined Benefit Plan, Plan Assets, Amount	1,149,000	1,333,000
Fair Value, Net Asset (Liability)	1,149,000	1,333,000
Fair Value, Inputs, Level 2 [Member] | Assets Designated for Retirement and Pension Plans [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Defined Benefit Plan, Plan Assets, Amount	10,961,000	12,715,000
Fair Value, Net Asset (Liability)	10,961,000	12,715,000
Fair Value, Inputs, Level 2 [Member] | Other Current Liabilities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Defined Benefit Plan, Benefit Obligation	(1,149,000)	(1,333,000)
Fair Value, Net Asset (Liability)	(1,149,000)	(1,333,000)
Fair Value, Inputs, Level 2 [Member] | Other Pension Plan [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Defined Benefit Plan, Benefit Obligation	(15,742,000)	(18,261,000)
Fair Value, Net Asset (Liability)	(15,742,000)	(18,261,000)
Fair Value, Inputs, Level 3 | Acqusition Earnout Accruals
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Acquisition Earnout Accruals	35,967,000	35,654,000
Fair Value, Inputs, Level 3 | Acqusition Earnout Accruals | Other Current Liabilities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Acquisition Earnout Accruals	35,967,000	0
Fair Value, Inputs, Level 3 | Acqusition Earnout Accruals | Other Liabilities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Acquisition Earnout Accruals	0		$ 35,700,000
Cash [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and Cash Equivalents, at Carrying Value	163,244,000	265,233,000
Money Market Funds [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and Cash Equivalents, at Carrying Value	46,825,000	80,798,000
US Treasury Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and Cash Equivalents, at Carrying Value	65,399,000	$ 199,194,000
Debt Securities, Available-for-sale, Amortized Cost	245,898,000
Debt Securities, Available-for-sale	245,906,000
Marketable Securities	180,507,000
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	$ 8,000

Fair Value Measures and Discl_4

Fair Value Measures and Disclosures Level 3 Liabilities (Details) - USD ($)	3 Months Ended		9 Months Ended		33 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Jun. 30, 2022	Dec. 31, 2022	Dec. 31, 2021
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Goodwill, Beginning Balance			$ 138,524,000
Restructuring Charges	$ 0	$ (3,262,000)	0	$ 3,792,000	$ 56,164,000
Goodwill, Ending Balance	138,069,000		138,069,000
Liabilities, Fair Value Adjustment			507,000
Fair Value, Inputs, Level 3 | Contingent Compensation
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Deferred Compensation Arrangement with Individual, Compensation Expense			(2,971,000)
Acquisition Earnout Accruals	(7,027,000)		(7,027,000)				$ (4,141,000)
Fair Value, Inputs, Level 3 | Contingent Compensation | current accrued salaries and beneftis
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Acquisition Earnout Accruals	(1.1)		(1.1)
Fair Value, Inputs, Level 3 | Contingent Compensation | non-current accrued salaries and benefits
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Acquisition Earnout Accruals	(5.9)		(5.9)			$ (4.1)
Fair Value, Inputs, Level 3 | Acqusition Earnout Accruals
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Earnout Accretion Fair Value Disclosure			(820,000)
Acquisition Earnout Accruals	(35,967,000)		(35,967,000)				(35,654,000)
Fair Value, Inputs, Level 3 | Acqusition Earnout Accruals | Other Current Liabilities [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Acquisition Earnout Accruals	$ (35,967,000)		$ (35,967,000)				$ 0

Fair Value Measures and Discl_5

Fair Value Measures and Disclosures Level 3 (Details) - Fair Value, Inputs, Level 3	9 Months Ended
	Sep. 30, 2022 USD ($)
Acqusition Earnout Accruals
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Acquisition Earnout Accruals	$ 35,654,000
Earnout Accretion Fair Value Disclosure	(820,000)
Acquisition Earnout Accruals	35,967,000
Contingent Compensation
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Acquisition Earnout Accruals	4,141,000
Fair Value Measurement With Unobservable Inputs, Recurring Basis Liability, Foreign Currency Translation	85,000
Acquisition Earnout Accruals	$ 7,027,000

Goodwill and Other Intangible_3

Goodwill and Other Intangible Assets - Goodwill (Details) - USD ($)	3 Months Ended	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2022	Dec. 31, 2021
Goodwill [Line Items]
Goodwill	$ 138,069,000	$ 138,069,000	$ 138,524,000
Goodwill, Foreign Currency Translation Gain (Loss)		(455,000)
Goodwill, Gross	171,039,000	171,039,000	171,494,000
Goodwill, Impaired, Accumulated Impairment Loss	(32,970,000)	(32,970,000)	(32,970,000)
Finite-Lived Intangible Assets, Net	$ 6,998,000	6,998,000	9,169,000
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	8 years 3 months 18 days
Customer Relationships [Member]
Goodwill [Line Items]
Finite-Lived Intangible Assets, Net	$ 4,785,000	4,785,000	5,632,000
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	10 years 8 months 12 days
Executive Search Member
Goodwill [Line Items]
Goodwill	$ 92,540,000	92,540,000	92,995,000
Finite-Lived Intangible Assets, Net	317,000	317,000	599,000
Executive Search Member | Americas
Goodwill [Line Items]
Goodwill	91,212,000	91,212,000	91,463,000
Goodwill, Foreign Currency Translation Gain (Loss)		(251,000)
Goodwill, Gross	91,212,000	91,212,000	91,463,000
Goodwill, Impaired, Accumulated Impairment Loss	0	0	0
Finite-Lived Intangible Assets, Net	58,000	58,000	103,000
Executive Search Member | Europe
Goodwill [Line Items]
Goodwill	1,328,000	1,328,000	1,532,000
Goodwill, Foreign Currency Translation Gain (Loss)		(204,000)
Goodwill, Gross	25,803,000	25,803,000	26,007,000
Goodwill, Impaired, Accumulated Impairment Loss	(24,475,000)	(24,475,000)	(24,475,000)
Finite-Lived Intangible Assets, Net	241,000	241,000	463,000
Executive Search Member | Asia Pacific
Goodwill [Line Items]
Goodwill	0	0	0
Goodwill, Foreign Currency Translation Gain (Loss)		0
Goodwill, Gross	8,495,000	8,495,000	8,495,000
Goodwill, Impaired, Accumulated Impairment Loss	(8,495,000)	(8,495,000)	(8,495,000)
Finite-Lived Intangible Assets, Net	18,000	18,000	33,000
On-Demand Talent
Goodwill [Line Items]
Goodwill	45,529,000	45,529,000	45,529,000
Goodwill, Foreign Currency Translation Gain (Loss)		0
Goodwill, Impaired, Accumulated Impairment Loss	0	0	0
Finite-Lived Intangible Assets, Net	$ 6,681,000	$ 6,681,000	$ 8,570,000

Goodwill and Other Intangible_4

Goodwill and Other Intangible Assets - Other Intangible Assets, net (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Goodwill and Intangible Assets Disclosure [Abstract]
Finite-Lived Intangible Asset, Expected Amortization, Remainder of Fiscal Year	$ 685,000		$ 685,000
Finite-Lived Intangible Asset, Expected Amortization, Year Two	2,711,000		2,711,000
Finite-Lived Intangible Asset, Expected Amortization, Year Three	1,146,000		1,146,000
Finite-Lived Intangible Asset, Expected Amortization, Year Five	527,000		527,000
Finite-Lived Intangible Assets, Net	$ 6,998,000		6,998,000		$ 9,169,000
Finite-Lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	8 years 3 months 18 days
Finite-Lived Intangible Assets, Gross	$ 26,286,000		26,286,000		27,678,000
Finite-Lived Intangible Assets, Accumulated Amortization	(19,288,000)		(19,288,000)		(18,509,000)
Finite-Lived Intangible Assets, Net	6,998,000		6,998,000		9,169,000
Amortization of Intangible Assets	800,000	$ 800,000	2,400,000	$ 1,800,000
Finite-Lived Intangible Asset, Expected Amortization, Year Three	759,000		759,000
HS:Finite-Lived Intangible Asset, Expected Amortization, After Year Four	1,170,000		1,170,000
Executive Search Member
Goodwill and Intangible Assets Disclosure [Abstract]
Finite-Lived Intangible Assets, Net	317,000		317,000		599,000
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Net	317,000		317,000		599,000
Executive Search Member | Americas
Goodwill and Intangible Assets Disclosure [Abstract]
Finite-Lived Intangible Assets, Net	58,000		58,000		103,000
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Net	58,000		58,000		103,000
Executive Search Member | Asia Pacific
Goodwill and Intangible Assets Disclosure [Abstract]
Finite-Lived Intangible Assets, Net	18,000		18,000		33,000
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Net	18,000		18,000		33,000
Executive Search Member | Europe
Goodwill and Intangible Assets Disclosure [Abstract]
Finite-Lived Intangible Assets, Net	241,000		241,000		463,000
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Net	241,000		241,000		463,000
On-Demand Talent
Goodwill and Intangible Assets Disclosure [Abstract]
Finite-Lived Intangible Assets, Net	6,681,000		6,681,000		8,570,000
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Net	6,681,000		6,681,000		8,570,000
Customer Relationships [Member]
Goodwill and Intangible Assets Disclosure [Abstract]
Finite-Lived Intangible Assets, Net	$ 4,785,000		4,785,000		5,632,000
Finite-Lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	10 years 8 months 12 days
Finite-Lived Intangible Assets, Gross	$ 20,807,000		20,807,000		22,127,000
Finite-Lived Intangible Assets, Accumulated Amortization	(16,022,000)		(16,022,000)		(16,495,000)
Finite-Lived Intangible Assets, Net	4,785,000		4,785,000		5,632,000
Trade Names [Member]
Goodwill and Intangible Assets Disclosure [Abstract]
Finite-Lived Intangible Assets, Net	$ 658,000		658,000		1,204,000
Finite-Lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	3 years 1 month 6 days
Finite-Lived Intangible Assets, Gross	$ 2,369,000		2,369,000		2,441,000
Finite-Lived Intangible Assets, Accumulated Amortization	(1,711,000)		(1,711,000)		(1,237,000)
Finite-Lived Intangible Assets, Net	658,000		658,000		1,204,000
Software and Software Development Costs
Goodwill and Intangible Assets Disclosure [Abstract]
Finite-Lived Intangible Assets, Net	$ 1,555,000		1,555,000		2,333,000
Finite-Lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	3 years
Finite-Lived Intangible Assets, Gross	$ 3,110,000		3,110,000		3,110,000
Finite-Lived Intangible Assets, Accumulated Amortization	(1,555,000)		(1,555,000)		(777,000)
Finite-Lived Intangible Assets, Net	$ 1,555,000		$ 1,555,000		$ 2,333,000

Deferred Costs, Capitalized, _3

Deferred Costs, Capitalized, Prepaid, and Other Assets (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Unbilled Receivables, Current	$ 36,771,000		$ 36,771,000		$ 36,942,000
Other Assets, Miscellaneous, Current	4,807,000		4,807,000		4,507,000
Other Assets, Current	41,578,000		41,578,000		41,449,000
Document Information [Line Items]
Other Sundry Liabilities	23,334,000		23,334,000		24,554,000
Other Liabilities, Current	59,301,000		59,301,000		24,554,000
Amortization of Intangible Assets	800,000	$ 800,000	2,400,000	$ 1,800,000
Acqusition Earnout Accruals | Fair Value, Inputs, Level 3
Document Information [Line Items]
Acquisition Earnout Accruals	35,967,000		35,967,000		35,654,000
Acqusition Earnout Accruals | Fair Value, Inputs, Level 3 | Other Current Liabilities [Member]
Document Information [Line Items]
Acquisition Earnout Accruals	$ 35,967,000		$ 35,967,000		$ 0

Debt (Details)

Debt (Details) - USD ($)	9 Months Ended
	Sep. 30, 2022	Dec. 31, 2021	Jul. 13, 2021	Oct. 26, 2018
Debt Disclosure [Abstract]
Line of Credit Facility, Maximum Borrowing Capacity			$ 200,000,000	$ 175,000,000
Long-term Line of Credit	$ 0	$ 0
Sub Limit for Letters of Credit	25,000,000
Line of Credit Facility Expansion Borrowing Capacity	75,000,000
Swingline Loan Sub Limit	$ 10,000,000

Compensation Related Costs, S_2

Compensation Related Costs, Share Based Payments (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant	334,744		334,744
Share-based Payment Arrangement, Expense, Tax Benefit	$ 1,072,000	$ 886,000	$ 2,320,000	$ 3,976,000
share-based compensation arrangement by share-based payment award, shares issued to date	3,769,836		3,769,836
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Forfeited to Date	754,580		754,580
Amortization of Intangible Assets	$ 800,000	800,000	$ 2,400,000	1,800,000
Labor and Related Expenses
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Payment Arrangement, Expensed and Capitalized, Amount	3,535,000	3,321,000	7,713,000	14,552,000
General and Administrative Expense
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Payment Arrangement, Expensed and Capitalized, Amount	405,000	$ 0	810,000	$ 345,000
Restricted Stock Units (RSUs)
Share-Based Payment Arrangement [Abstract]
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount	9,600,000		$ 9,600,000
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition			2 years 7 months 6 days
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount	$ 9,600,000		$ 9,600,000
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition			2 years 7 months 6 days
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period			3 years
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number	733,301		733,301		727,651
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value	$ 31.99		$ 31.99		$ 31.32
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period			287,954
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period			(272,601)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period			(9,703)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value			$ 34.05
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value			32.25
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value			$ 35.68
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number	733,301		733,301		727,651
Performance Shares
Share-Based Payment Arrangement [Abstract]
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount	$ 6,000,000		$ 6,000,000
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition			1 year 10 months 24 days
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount	6,000,000		$ 6,000,000
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition			1 year 10 months 24 days
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number		260,452		260,452	232,857
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value		$ 40.02		$ 40.02	$ 39.88
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period			97,379
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period			(69,784)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period			0
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value			$ 49.59
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value			52.91
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value			$ 0
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number		260,452		260,452	232,857
Performance Shares | Executive Officer
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period			3 years
Performance Shares | Executive Officer | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage			0%
Performance Shares | Executive Officer | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage			200%
Phantom Share Units (PSUs) [Member]
Share-Based Payment Arrangement [Abstract]
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount	3,700,000		$ 3,700,000
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition			3 years 4 months 24 days
Share-based Payment Arrangement, Expense	(200,000)	$ 500,000	$ 3,100,000	$ 6,200,000
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Payment Arrangement, Expense	(200,000)	$ 500,000	3,100,000	$ 6,200,000
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount	$ 3,700,000		$ 3,700,000
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition			3 years 4 months 24 days
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period			4 years
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number		325,205		325,205	348,863
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period			95,675
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period			(119,333)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period			0
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number		325,205		325,205	348,863
Special Restricted Stock Unit
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period			4 years

Restructuring and Related Act_3

Restructuring and Related Activities - Restructuring Charges by Segment and Type (Details) - USD ($)	3 Months Ended		9 Months Ended		33 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Jun. 30, 2022
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	$ 0	$ (3,262,000)	$ 0	$ 3,792,000	$ 56,164,000
Corporate, Non-Segment
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		(105,000)		(224,000)	3,795,000
Heidrick Consulting
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		300,000		(400,000)
Heidrick Consulting | Operating Segments
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		(279,000)		355,000	5,012,000
Other Restructuring
Restructuring Cost and Reserve [Line Items]
Restructuring Charges				(13,000)	695,000
Other Restructuring | Corporate, Non-Segment
Restructuring Cost and Reserve [Line Items]
Restructuring Charges				10,000	560,000
Other Restructuring | Heidrick Consulting | Operating Segments
Restructuring Cost and Reserve [Line Items]
Restructuring Charges				0	71,000
Employee Severance
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		(107,000)		183,000	32,597,000
Employee Severance | Corporate, Non-Segment
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		94,000		62,000	1,416,000
Employee Severance | Heidrick Consulting | Operating Segments
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		0		(44,000)	2,589,000
Facility Closing
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		3,369,000		(3,962,000)	22,872,000
Facility Closing | Corporate, Non-Segment
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		(199,000)		(296,000)	1,819,000
Facility Closing | Heidrick Consulting | Operating Segments
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		(279,000)		399,000	2,352,000
Americas
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		2,900,000		3,900,000
Americas | Executive Search Member | Operating Segments
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		(2,887,000)		3,882,000	34,361,000
Americas | Other Restructuring | Executive Search Member | Operating Segments
Restructuring Cost and Reserve [Line Items]
Restructuring Charges				3,000	34,000
Americas | Employee Severance | Executive Search Member | Operating Segments
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		4,000		20,000	16,226,000
Americas | Facility Closing | Executive Search Member | Operating Segments
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		(2,891,000)		3,859,000	18,101,000
Europe
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		(100,000)		(100,000)
Europe | Executive Search Member | Operating Segments
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		9,000		(97,000)	8,506,000
Europe | Other Restructuring | Executive Search Member | Operating Segments
Restructuring Cost and Reserve [Line Items]
Restructuring Charges				0	24,000
Europe | Employee Severance | Executive Search Member | Operating Segments
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		9,000		(97,000)	8,256,000
Europe | Facility Closing | Executive Search Member | Operating Segments
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		0		0	226,000
Asia Pacific
Restructuring Cost and Reserve [Line Items]
Restructuring Charges				(100,000)
Asia Pacific | Executive Search Member | Operating Segments
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		0		(124,000)	4,490,000
Asia Pacific | Other Restructuring | Executive Search Member | Operating Segments
Restructuring Cost and Reserve [Line Items]
Restructuring Charges				0	6,000
Asia Pacific | Employee Severance | Executive Search Member | Operating Segments
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		0		(124,000)	4,110,000
Asia Pacific | Facility Closing | Executive Search Member | Operating Segments
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		$ 0		$ 0	$ 374,000

Restructuring and Related Act_4

Restructuring and Related Activities - Restructuring Charges by Segment and Type Incurred to Date(Details) - USD ($)	3 Months Ended		9 Months Ended		33 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Jun. 30, 2022
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	$ 0	$ (3,262,000)	$ 0	$ 3,792,000	$ 56,164,000
Employee Severance
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		(107,000)		183,000	32,597,000
Facility Closing
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		3,369,000		(3,962,000)	22,872,000
Other Restructuring
Restructuring Cost and Reserve [Line Items]
Restructuring Charges				(13,000)	695,000
Corporate, Non-Segment
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		(105,000)		(224,000)	3,795,000
Corporate, Non-Segment | Employee Severance
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		94,000		62,000	1,416,000
Corporate, Non-Segment | Facility Closing
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		(199,000)		(296,000)	1,819,000
Corporate, Non-Segment | Other Restructuring
Restructuring Cost and Reserve [Line Items]
Restructuring Charges				10,000	560,000
Heidrick Consulting
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		300,000		(400,000)
Heidrick Consulting | Operating Segments
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		(279,000)		355,000	5,012,000
Heidrick Consulting | Operating Segments | Employee Severance
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		0		(44,000)	2,589,000
Heidrick Consulting | Operating Segments | Facility Closing
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		(279,000)		399,000	2,352,000
Heidrick Consulting | Operating Segments | Other Restructuring
Restructuring Cost and Reserve [Line Items]
Restructuring Charges				0	71,000
Americas
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		2,900,000		3,900,000
Americas | Executive Search Member | Operating Segments
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		(2,887,000)		3,882,000	34,361,000
Americas | Executive Search Member | Operating Segments | Employee Severance
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		4,000		20,000	16,226,000
Americas | Executive Search Member | Operating Segments | Facility Closing
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		(2,891,000)		3,859,000	18,101,000
Americas | Executive Search Member | Operating Segments | Other Restructuring
Restructuring Cost and Reserve [Line Items]
Restructuring Charges				3,000	34,000
Europe
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		(100,000)		(100,000)
Europe | Executive Search Member | Operating Segments
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		9,000		(97,000)	8,506,000
Europe | Executive Search Member | Operating Segments | Employee Severance
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		9,000		(97,000)	8,256,000
Europe | Executive Search Member | Operating Segments | Facility Closing
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		0		0	226,000
Europe | Executive Search Member | Operating Segments | Other Restructuring
Restructuring Cost and Reserve [Line Items]
Restructuring Charges				0	24,000
Asia Pacific
Restructuring Cost and Reserve [Line Items]
Restructuring Charges				(100,000)
Asia Pacific | Executive Search Member | Operating Segments
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		0		(124,000)	4,490,000
Asia Pacific | Executive Search Member | Operating Segments | Employee Severance
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		0		(124,000)	4,110,000
Asia Pacific | Executive Search Member | Operating Segments | Facility Closing
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		$ 0		0	374,000
Asia Pacific | Executive Search Member | Operating Segments | Other Restructuring
Restructuring Cost and Reserve [Line Items]
Restructuring Charges				$ 0	$ 6,000

Restructuring and Related Act_5

Restructuring and Related Activities - Changes to the Accrual (Details) - Employee Severance - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2022	Dec. 31, 2021
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	$ 3,360	$ 8,394
Payments for Restructuring	(4,843)
Restructuring Reserve, Settled without Cash	(34)
Restructuring Reserve, Foreign Currency Translation Gain (Loss)	$ (157)

Restructuring and Related Act_6

Restructuring and Related Activities (Details) - USD ($)	3 Months Ended		6 Months Ended	9 Months Ended		33 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Jun. 30, 2022	Sep. 30, 2022	Sep. 30, 2021	Jun. 30, 2022	Dec. 31, 2021
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	$ 0	$ (3,262,000)		$ 0	$ 3,792,000	$ 56,164,000
Early Surrender Agreement Payment				11,700,000
Lease Liability Associated with Surrendered Office			$ 17,400,000
Gain on Early Termination Agreement				5,700,000
Early Surrender Agreement Payment				11,700,000
Lease Liability Associated with Surrendered Office			$ 17,400,000
Gain on Early Termination Agreement				5,700,000
Americas
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		2,900,000			3,900,000
Europe
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		(100,000)			(100,000)
Asia Pacific
Restructuring Cost and Reserve [Line Items]
Restructuring Charges					(100,000)
Heidrick Consulting
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		300,000			(400,000)
Employee Severance
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve	$ 3,360,000			3,360,000			$ 8,394,000
Restructuring Charges		(107,000)			183,000	32,597,000
Payments for Restructuring				(4,843,000)
Restructuring Reserve, Settled without Cash				(34,000)
Restructuring Reserve, Foreign Currency Translation Gain (Loss)				$ (157,000)
Facility Closing
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		$ 3,369,000			(3,962,000)	22,872,000
Other Restructuring
Restructuring Cost and Reserve [Line Items]
Restructuring Charges					$ (13,000)	$ 695,000

Income Taxes (Details)

Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Income Tax Disclosure [Abstract]
Effective Income Tax Rate Reconciliation, Percent	29.50%	27%	31.30%	31.80%
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	$ 29,534	$ 33,577	$ 92,344	$ 88,123
Income Tax Expense (Benefit)	$ 8,708	$ 9,079	$ 28,902	$ 28,028

Comprehensive Text Block List_2

Comprehensive Text Block List (Details) - USD ($)	3 Months Ended		9 Months Ended		33 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax	$ (12,385,000)		$ (12,385,000)				$ 1,675,000
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	384,531,000	$ 323,256,000	384,531,000	$ 323,256,000	$ 368,474,000	$ 350,765,000	336,020,000	$ 299,553,000	$ 278,570,000	$ 267,602,000
Restructuring Charges	0	3,262,000	0	(3,792,000)	(56,164,000)
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Including Noncontrolling Interest
Accumulated Other Comprehensive Income (Loss) [Line Items]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	8,000		8,000				0
Reclassification from AOCI, Current Period, Net of Tax, Attributable to Parent			8,000
Accumulated Foreign Currency Adjustment Including Portion Attributable to Noncontrolling Interest
Accumulated Other Comprehensive Income (Loss) [Line Items]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	(9,774,000)		(9,774,000)				4,294,000
Reclassification from AOCI, Current Period, Net of Tax, Attributable to Parent			(14,068,000)
Accumulated Defined Benefit Plans Adjustment Including Portion Attributable to Noncontrolling Interest
Accumulated Other Comprehensive Income (Loss) [Line Items]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	(2,619,000)		(2,619,000)				(2,619,000)
Reclassification from AOCI, Current Period, Net of Tax, Attributable to Parent			0
AOCI Attributable to Parent
Accumulated Other Comprehensive Income (Loss) [Line Items]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	$ (12,385,000)	$ 2,068,000	(12,385,000)	$ 2,068,000	$ (6,931,000)	$ 593,000	$ 1,675,000	$ 2,729,000	$ 2,724,000	$ 3,417,000
Reclassification from AOCI, Current Period, Net of Tax, Attributable to Parent			$ (14,060,000)

Segment Reporting (Details)

Segment Reporting (Details) - USD ($)	3 Months Ended		9 Months Ended		33 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Jun. 30, 2022
Revenues [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 258,271,000	$ 265,315,000	$ 844,917,000	$ 721,281,000
Operating Income (Loss) [Abstract]
Operating Income (Loss)	28,322,000	33,342,000	92,420,000	81,656,000
Research and Development Expense	5,400,000	0	14,347,000	0
Restructuring Charges	0	3,262,000	0	(3,792,000)	$ (56,164,000)
Liabilities, Fair Value Adjustment			507,000
Reimbursements
Revenues [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	3,086,000	1,490,000	7,170,000	3,819,000
Service
Revenues [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	255,185,000	263,825,000	837,747,000	717,462,000
Americas
Operating Income (Loss) [Abstract]
Restructuring Charges		(2,900,000)		(3,900,000)
Europe
Operating Income (Loss) [Abstract]
Restructuring Charges		100,000		100,000
Asia Pacific
Operating Income (Loss) [Abstract]
Restructuring Charges				100,000
Heidrick Consulting
Operating Income (Loss) [Abstract]
Restructuring Charges		(300,000)		400,000
Operating Segments
Operating Income (Loss) [Abstract]
Operating Income (Loss)	47,620,000	46,804,000	147,273,000	116,514,000
Operating Segments | Service
Revenues [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	255,185,000	263,825,000	837,747,000	717,462,000
Operating Segments | Executive Search Member
Operating Income (Loss) [Abstract]
Operating Income (Loss)	49,896,000	48,479,000	152,972,000	126,377,000
Operating Segments | Executive Search Member | Service
Revenues [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	212,807,000	221,646,000	709,265,000	625,397,000
Operating Segments | Executive Search Member | Americas
Operating Income (Loss) [Abstract]
Operating Income (Loss)	39,741,000	38,972,000	123,842,000	99,822,000
Restructuring Charges		2,887,000		(3,882,000)	(34,361,000)
Operating Segments | Executive Search Member | Americas | Service
Revenues [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	143,747,000	148,844,000	482,320,000	412,740,000
Operating Segments | Executive Search Member | Europe
Operating Income (Loss) [Abstract]
Operating Income (Loss)	5,652,000	4,795,000	15,661,000	13,314,000
Restructuring Charges		(9,000)		97,000	(8,506,000)
Operating Segments | Executive Search Member | Europe | Service
Revenues [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	41,141,000	42,676,000	139,017,000	125,228,000
Operating Segments | Executive Search Member | Asia Pacific
Operating Income (Loss) [Abstract]
Operating Income (Loss)	4,503,000	4,712,000	13,469,000	13,241,000
Restructuring Charges		0		124,000	(4,490,000)
Operating Segments | Executive Search Member | Asia Pacific | Service
Revenues [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	27,919,000	30,126,000	87,928,000	87,429,000
Operating Segments | Heidrick Consulting
Operating Income (Loss) [Abstract]
Operating Income (Loss)	(2,000,000)	(2,556,000)	(4,492,000)	(10,897,000)
Restructuring Charges		279,000		(355,000)	(5,012,000)
Operating Segments | Heidrick Consulting | Service
Revenues [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	19,131,000	17,892,000	59,501,000	49,059,000
Operating Segments | On-Demand Talent
Operating Income (Loss) [Abstract]
Operating Income (Loss)	(276,000)	881,000	(1,207,000)	1,034,000
Operating Segments | On-Demand Talent | Service
Revenues [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	23,247,000	24,287,000	68,981,000	43,006,000
Corporate, Non-Segment
Operating Income (Loss) [Abstract]
Operating Income (Loss)	(13,898,000)	(13,462,000)	(40,506,000)	(34,858,000)
Restructuring Charges		105,000		224,000	$ (3,795,000)
Segment Reconciling Items
Operating Income (Loss) [Abstract]
Operating Income (Loss)	$ (5,400,000)	$ 0	$ (14,347,000)	$ 0

Guarantees (Details)

Guarantees (Details)	Sep. 30, 2022 USD ($)
Guarantees and Product Warranties [Abstract]
Guarantor Obligations, Maximum Exposure, Undiscounted	$ 4,200,000

Subsequent Events (Details)

Subsequent Events (Details) - USD ($)	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Jul. 13, 2021	Oct. 26, 2018
Subsequent Event [Line Items]
Payments to Acquire Businesses, Gross	$ 0	$ 31,969,000
Line of Credit Facility, Maximum Borrowing Capacity			$ 200,000,000	$ 175,000,000
Sub Limit for Letters of Credit	25,000,000
Swingline Loan Sub Limit	10,000,000
Line of Credit Facility Expansion Borrowing Capacity	$ 75,000,000

Business Combinations (Details)

Business Combinations (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Business Combinations [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 258,271,000	$ 265,315,000	$ 844,917,000	$ 721,281,000
Operating Income (Loss)	28,322,000	33,342,000	92,420,000	81,656,000
Business Acquisition [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	258,271,000	265,315,000	844,917,000	721,281,000
Operating Income (Loss)	$ 28,322,000	$ 33,342,000	$ 92,420,000	$ 81,656,000