$HSII
HEIDRICK & STRUGGLES INTERNATIONAL INC Stock $hsii

$hsii Overview Financials Valuation SEC Filings Company Website

2024 Q1 Form 10-K Financial Statement

#000106660524000008 Filed on March 04, 2024

Income Statement

Concept	2024 Q1	2023 Q4	2023
Revenue	$269.1M	$257.4M	$1.041B
YoY Change	11.14%	7.84%	-3.91%
Cost Of Revenue	$27.43M	$34.45M	$109.0M
YoY Change	20.15%	68.57%	34.95%
Gross Profit	$241.7M	$222.9M	$932.1M
YoY Change	10.21%	2.16%	-7.04%
Gross Profit Margin	89.81%	86.62%	89.53%
Selling, General & Admin	$215.8M	$195.1M	$812.5M
YoY Change	11.69%	1.46%	-6.62%
% of Gross Profit	89.29%	87.52%	87.17%
Research & Development	$5.715M	$5.952M	$22.70M
YoY Change	3.38%	-1.9%	11.19%
% of Gross Profit	2.36%	2.67%	2.44%
Depreciation & Amortization	$4.790M	$5.076M	$18.51M
YoY Change	23.68%	82.66%	74.55%
% of Gross Profit	1.98%	2.28%	1.99%
Operating Expenses	$5.715M	$201.1M	$22.70M
YoY Change	3.38%	1.36%	-97.66%
Operating Profit	$16.27M	$21.86M	$75.36M
YoY Change	-8.42%	10.17%	-32.88%
Interest Expense	$4.086M	$3.950M	$11.62M
YoY Change	25.76%	7.54%	117.67%
% of Operating Profit	25.11%	18.07%	15.42%
Other Income/Expense, Net	$6.657M	-$840.0K	$13.31M
YoY Change	31.61%	33.97%	348.28%
Pretax Income	$22.93M	$24.97M	$88.67M
YoY Change	0.45%	9.09%	-23.05%
Income Tax	$8.899M	$10.12M	$34.26M
% Of Pretax Income	38.81%	40.52%	38.64%
Net Earnings	$14.03M	$14.86M	$54.41M
YoY Change	-9.97%	-7.41%	-31.55%
Net Earnings / Revenue	5.21%	5.77%	5.23%
Basic Earnings Per Share	$0.70		$2.72
Diluted Earnings Per Share	$0.67	$0.71	$2.62
COMMON SHARES
Basic Shares Outstanding	20.12M shares	20.12M shares	20.03M shares
Diluted Shares Outstanding	21.04M shares		20.77M shares

Balance Sheet

Concept	2024 Q1	2023 Q4	2023
SHORT-TERM ASSETS
Cash & Short-Term Investments	$252.8M	$478.2M	$478.2M
YoY Change	23.52%	-23.08%	-23.08%
Cash & Equivalents	$252.8M	$412.6M	$412.6M
Short-Term Investments	$0.00	$65.54M	$65.54M
Other Short-Term Assets	$48.87M	$47.92M	$39.43M
YoY Change	14.09%	17.68%	33.51%
Inventory
Prepaid Expenses
Receivables	$173.0M	$133.1M	$165.2M
Other Receivables	$5.957M	$10.41M	$10.41M
Total Short-Term Assets	$512.0M	$693.2M	$693.2M
YoY Change	14.72%	-15.85%	-15.85%
LONG-TERM ASSETS
Property, Plant & Equipment	$40.45M	$35.75M	$121.8M
YoY Change	24.4%	18.36%	19.82%
Goodwill	$200.1M	$202.3M
YoY Change	1.2%	46.18%
Intangibles
YoY Change
Long-Term Investments	$54.84M	$47.29M	$47.29M
YoY Change	28.88%	37.65%	37.65%
Other Assets	$16.68M	$17.07M	$56.18M
YoY Change	-47.33%	-33.8%	-20.99%
Total Long-Term Assets	$453.4M	$448.4M	$448.4M
YoY Change	1.87%	27.45%	27.45%
TOTAL ASSETS
Total Short-Term Assets	$512.0M	$693.2M	$693.2M
Total Long-Term Assets	$453.4M	$448.4M	$448.4M
Total Assets	$965.5M	$1.142B	$1.142B
YoY Change	8.3%	-2.9%	-2.9%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$19.78M	$20.84M	$20.84M
YoY Change	16.5%	42.59%	42.59%
Accrued Expenses	$154.1M	$344.2M	$344.2M
YoY Change	-4.08%	-26.87%	-26.87%
Deferred Revenue	$47.38M	$45.73M
YoY Change	9.3%	6.21%
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$251.9M	$438.7M	$438.7M
YoY Change	-3.19%	-25.45%	-25.45%
LONG-TERM LIABILITIES
Long-Term Debt	$0.00	$0.00	$0.00
YoY Change
Other Long-Term Liabilities	$41.15M	$41.81M	$234.2M
YoY Change	11.89%	-76.31%	32.69%
Total Long-Term Liabilities	$244.8M	$240.6M	$234.2M
YoY Change	16.48%	36.32%	32.69%
TOTAL LIABILITIES
Total Short-Term Liabilities	$251.9M	$438.7M	$438.7M
Total Long-Term Liabilities	$244.8M	$240.6M	$234.2M
Total Liabilities	$496.7M	$679.3M	$679.3M
YoY Change	5.6%	-11.2%	-11.2%
SHAREHOLDERS EQUITY
Retained Earnings	$220.9M	$210.1M
YoY Change	22.26%	24.9%
Common Stock	$252.0M	$252.2M
YoY Change	3.04%	2.17%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$468.8M	$462.3M	$462.3M
YoY Change
Total Liabilities & Shareholders Equity	$965.5M	$1.142B	$1.142B
YoY Change	8.3%	-2.9%	-2.9%

Cashflow Statement

Concept	2024 Q1	2023 Q4	2023
OPERATING ACTIVITIES
Net Income	$14.03M	$14.86M	$54.41M
YoY Change	-9.97%	-7.41%	-31.55%
Depreciation, Depletion And Amortization	$4.790M	$5.076M	$18.51M
YoY Change	23.68%	82.66%	74.55%
Cash From Operating Activities	-$203.4M	$153.8M	-$26.79M
YoY Change	-39.64%	-4.06%	-122.46%
INVESTING ACTIVITIES
Capital Expenditures	$6.173M	$3.814M	$13.43M
YoY Change	62.11%	28.94%	20.65%
Acquisitions
YoY Change
Other Investing Activities	$60.89M	-$29.24M	$147.0M
YoY Change	-73.74%	-65.02%	-154.77%
Cash From Investing Activities	$54.71M	-$33.05M	$133.6M
YoY Change	-76.01%	-61.81%	-147.78%
FINANCING ACTIVITIES
Cash Dividend Paid	$3.216M		$12.54M
YoY Change	3.34%		0.57%
Common Stock Issuance & Retirement, Net			$904.0K
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-$6.078M	-1.116M	-$53.53M
YoY Change	-85.93%	-64.27%	241.27%
NET CHANGE
Cash From Operating Activities	-$203.4M	153.8M	-$26.79M
Cash From Investing Activities	$54.71M	-33.05M	$133.6M
Cash From Financing Activities	-$6.078M	-1.116M	-$53.53M
Net Change In Cash	-$159.8M	119.7M	$57.13M
YoY Change	5.99%	69.31%	-130.1%
FREE CASH FLOW
Cash From Operating Activities	-$203.4M	$153.8M	-$26.79M
Capital Expenditures	$6.173M	$3.814M	$13.43M
Free Cash Flow	-$209.6M	$150.0M	-$40.23M
YoY Change	-38.51%	-4.68%	-137.19%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2023	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	13314000	usd
CY2023	us-gaap	Income Loss Attributable To Parent IncomeLossAttributableToParent	88671000	usd
CY2022	us-gaap	Income Loss Attributable To Parent IncomeLossAttributableToParent	115236000	usd
CY2023	us-gaap	Net Income Loss NetIncomeLoss	54410000	usd
CY2022	us-gaap	Net Income Loss NetIncomeLoss	79486000	usd
CY2021	us-gaap	Net Income Loss NetIncomeLoss	72572000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	-8457000	usd
CY2022	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	73622000	usd
CY2021	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	70830000	usd
CY2021	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	19515000	shares
CY2022	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	2970000	usd
CY2021	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	7765000	usd
CY2021	us-gaap	Income Loss Attributable To Parent IncomeLossAttributableToParent	106029000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-1742000	usd
CY2021	us-gaap	Net Income Loss NetIncomeLoss	72572000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-1742000	usd
CY2021	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	12760000	usd
CY2023	dei	Auditor Firm AuditorFirmId	49
CY2023	dei	Auditor Name AuditorName	RSM US LLP
CY2023	dei	Auditor Location AuditorLocation	Chicago, Illinois
CY2023Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	412618000	usd
CY2022Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	355447000	usd
CY2023Q4	us-gaap	Marketable Securities Current MarketableSecuritiesCurrent	65538000	usd
CY2022Q4	us-gaap	Marketable Securities Current MarketableSecuritiesCurrent	266169000	usd
CY2023Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	6954000	usd
CY2022Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	6643000	usd
CY2023Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	133128000	usd
CY2022Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	126437000	usd
CY2023Q4	us-gaap	Prepaid Expense Current And Noncurrent PrepaidExpenseCurrentAndNoncurrent	23597000	usd
CY2022Q4	us-gaap	Prepaid Expense Current And Noncurrent PrepaidExpenseCurrentAndNoncurrent	24098000	usd
CY2023	dei	Amendment Flag AmendmentFlag	false
CY2023	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2023
CY2023	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2023	dei	Entity Central Index Key EntityCentralIndexKey	0001066605
CY2023	dei	Document Annual Report DocumentAnnualReport	true
CY2023	dei	Document Period End Date DocumentPeriodEndDate	2023-12-31
CY2023	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2023	dei	Document Transition Report DocumentTransitionReport	false
CY2023	dei	Entity File Number EntityFileNumber	0-25837
CY2023	dei	Entity Registrant Name EntityRegistrantName	HEIDRICK & STRUGGLES INTERNATIONAL, INC.
CY2023	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	DE
CY2023	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	36-2681268
CY2023	dei	Entity Address Address Line1 EntityAddressAddressLine1	233 South Wacker Drive
CY2023	dei	Entity Address Address Line2 EntityAddressAddressLine2	Suite 4900
CY2023	dei	Entity Address City Or Town EntityAddressCityOrTown	Chicago
CY2023	dei	Entity Address State Or Province EntityAddressStateOrProvince	IL
CY2023	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	60606-6303
CY2023	dei	City Area Code CityAreaCode	(312)
CY2023	dei	Local Phone Number LocalPhoneNumber	496-1200
CY2023	dei	Security12b Title Security12bTitle	Common Stock, $.01 par value
CY2023	dei	Trading Symbol TradingSymbol	HSII
CY2023	dei	Security Exchange Name SecurityExchangeName	NASDAQ
CY2023	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	No
CY2023	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2023	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2023	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
CY2023	dei	Entity Filer Category EntityFilerCategory	Accelerated Filer
CY2023	dei	Entity Small Business EntitySmallBusiness	false
CY2023	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2023	dei	Icfr Auditor Attestation Flag IcfrAuditorAttestationFlag	true
CY2023	dei	Document Fin Stmt Error Correction Flag DocumentFinStmtErrorCorrectionFlag	false
CY2023	dei	Entity Shell Company EntityShellCompany	false
CY2023Q2	dei	Entity Public Float EntityPublicFloat	427408808	usd
CY2024Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	20122792	shares
CY2023Q4	us-gaap	Other Assets Current OtherAssetsCurrent	47923000	usd
CY2022Q4	us-gaap	Other Assets Current OtherAssetsCurrent	40722000	usd
CY2023Q4	us-gaap	Income Tax Receivable IncomeTaxReceivable	10410000	usd
CY2022Q4	us-gaap	Income Tax Receivable IncomeTaxReceivable	10946000	usd
CY2023Q4	us-gaap	Assets Current AssetsCurrent	693214000	usd
CY2022Q4	us-gaap	Assets Current AssetsCurrent	823819000	usd
CY2023Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	35752000	usd
CY2022Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	30207000	usd
CY2023Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	86063000	usd
CY2022Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	71457000	usd
CY2023Q4	us-gaap	Defined Benefit Plan Assets For Plan Benefits Noncurrent DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent	11105000	usd
CY2022Q4	us-gaap	Defined Benefit Plan Assets For Plan Benefits Noncurrent DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent	11332000	usd
CY2023Q4	us-gaap	Long Term Investments LongTermInvestments	47287000	usd
CY2022Q4	us-gaap	Long Term Investments LongTermInvestments	34354000	usd
CY2023Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	17071000	usd
CY2022Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	25788000	usd
CY2023Q4	us-gaap	Goodwill Goodwill	202252000	usd
CY2022Q4	us-gaap	Goodwill Goodwill	138361000	usd
CY2023Q4	us-gaap	Other Intangible Assets Net OtherIntangibleAssetsNet	20842000	usd
CY2022Q4	us-gaap	Other Intangible Assets Net OtherIntangibleAssetsNet	6333000	usd
CY2023Q4	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	28005000	usd
CY2022Q4	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	33987000	usd
CY2023Q4	us-gaap	Assets Noncurrent AssetsNoncurrent	448377000	usd
CY2022Q4	us-gaap	Assets Noncurrent AssetsNoncurrent	351819000	usd
CY2023Q4	us-gaap	Assets Assets	1141591000	usd
CY2022Q4	us-gaap	Assets Assets	1175638000	usd
CY2023Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	20837000	usd
CY2022Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	14613000	usd
CY2023Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	322744000	usd
CY2022Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	451161000	usd
CY2023Q4	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	45732000	usd
CY2023Q4	us-gaap	Deferred Revenue Current DeferredRevenueCurrent	45732000	usd
CY2022Q4	us-gaap	Deferred Revenue Current DeferredRevenueCurrent	43057000	usd
CY2022Q4	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	43057000	usd
CY2023Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	21498000	usd
CY2022Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	19554000	usd
CY2023Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	21823000	usd
CY2022Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	56016000	usd
CY2023Q4	us-gaap	Accrued Income Taxes Current AccruedIncomeTaxesCurrent	6057000	usd
CY2022Q4	us-gaap	Accrued Income Taxes Current AccruedIncomeTaxesCurrent	4076000	usd
CY2023Q4	us-gaap	Liabilities Current LiabilitiesCurrent	438691000	usd
CY2022Q4	us-gaap	Liabilities Current LiabilitiesCurrent	588477000	usd
CY2023Q4	hsii	Accrued Salaries And Benefits AccruedSalariesAndBenefits	52108000	usd
CY2022Q4	hsii	Accrued Salaries And Benefits AccruedSalariesAndBenefits	59467000	usd
CY2023Q4	us-gaap	Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrent PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent	62100000	usd
CY2022Q4	us-gaap	Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrent PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent	48456000	usd
CY2023Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	78204000	usd
CY2022Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	63299000	usd
CY2023Q4	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	6402000	usd
CY2022Q4	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	0	usd
CY2023Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	41808000	usd
CY2022Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	5293000	usd
CY2023Q4	us-gaap	Liabilities Noncurrent LiabilitiesNoncurrent	240622000	usd
CY2022Q4	us-gaap	Liabilities Noncurrent LiabilitiesNoncurrent	176515000	usd
CY2023Q4	us-gaap	Liabilities Liabilities	679313000	usd
CY2022Q4	us-gaap	Liabilities Liabilities	764992000	usd
CY2023Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		usd
CY2022Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		usd
CY2023Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.01
CY2022Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.01
CY2023Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	10000000	shares
CY2022Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	10000000	shares
CY2022Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2023Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2023Q4	us-gaap	Preferred Stock Value PreferredStockValue	0	usd
CY2022Q4	us-gaap	Preferred Stock Value PreferredStockValue	0	usd
CY2022Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2023Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2022Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	100000000	shares
CY2023Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	100000000	shares
CY2023Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	20127872	shares
CY2022Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	19866287	shares
CY2023Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	20122792	shares
CY2022Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	19861207	shares
CY2023Q4	us-gaap	Common Stock Value CommonStockValue	201000	usd
CY2022Q4	us-gaap	Common Stock Value CommonStockValue	199000	usd
CY2023Q4	us-gaap	Treasury Stock Common Shares TreasuryStockCommonShares	5080	shares
CY2022Q4	us-gaap	Treasury Stock Common Shares TreasuryStockCommonShares	5080	shares
CY2023Q4	us-gaap	Treasury Stock Common Value TreasuryStockCommonValue	110000	usd
CY2022Q4	us-gaap	Treasury Stock Common Value TreasuryStockCommonValue	191000	usd
CY2023Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	251988000	usd
CY2022Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	246630000	usd
CY2023Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	210070000	usd
CY2022Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	168197000	usd
CY2023Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	129000	usd
CY2022Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-4189000	usd
CY2023Q4	us-gaap	Stockholders Equity StockholdersEquity	462278000	usd
CY2022Q4	us-gaap	Stockholders Equity StockholdersEquity	410646000	usd
CY2023Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	1141591000	usd
CY2022Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	1175638000	usd
CY2023	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	1026864000	usd
CY2022	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	1073464000	usd
CY2021	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	1003001000	usd
CY2023	hsii	Reimbursement Revenue ReimbursementRevenue	14318000	usd
CY2022	hsii	Reimbursement Revenue ReimbursementRevenue	10122000	usd
CY2021	hsii	Reimbursement Revenue ReimbursementRevenue	5473000	usd
CY2023	us-gaap	Revenues Revenues	1041182000	usd
CY2022	us-gaap	Revenues Revenues	1083586000	usd
CY2021	us-gaap	Revenues Revenues	1008474000	usd
CY2023	us-gaap	Labor And Related Expense LaborAndRelatedExpense	656030000	usd
CY2022	us-gaap	Labor And Related Expense LaborAndRelatedExpense	737430000	usd
CY2021	us-gaap	Labor And Related Expense LaborAndRelatedExpense	717411000	usd
CY2023	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	156494000	usd
CY2022	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	132678000	usd
CY2021	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	130749000	usd
CY2023	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	109039000	usd
CY2022	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	70676000	usd
CY2021	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	52785000	usd
CY2023	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	22698000	usd
CY2022	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	20414000	usd
CY2021	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	0	usd
CY2023	us-gaap	Asset Impairment Charges AssetImpairmentCharges	7246000	usd
CY2022	us-gaap	Asset Impairment Charges AssetImpairmentCharges	0	usd
CY2021	us-gaap	Asset Impairment Charges AssetImpairmentCharges	0	usd
CY2022	us-gaap	Restructuring Charges RestructuringCharges	0	usd
CY2021	us-gaap	Restructuring Charges RestructuringCharges	3792000	usd
CY2021	hsii	Reimbursed Expenses ReimbursedExpenses	5473000	usd
CY2023	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	11617000	usd
CY2022	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	5337000	usd
CY2021	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	302000	usd
CY2023	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	1697000	usd
CY2022	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-2367000	usd
CY2023	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	34261000	usd
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	35750000	usd
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	33457000	usd
CY2023	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	4810000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	-1890000	usd
CY2023	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent	83000	usd
CY2022	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent	-41000	usd
CY2021	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent	0	usd
CY2023	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	575000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-2634000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-148000	usd
CY2023	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	4318000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-5864000	usd
CY2023	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	58728000	usd
CY2023	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	20029000	shares
CY2022	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	19758000	shares
CY2023	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	20766000	shares
CY2022	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	20618000	shares
CY2021	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	20296000	shares
CY2023	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.72
CY2022	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	4.02
CY2021	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	3.72
CY2023	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.62
CY2022	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	3.86
CY2021	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	3.58
CY2023	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.60
CY2022	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.60
CY2021	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.60
CY2023	us-gaap	Net Income Loss NetIncomeLoss	54410000	usd
CY2022	us-gaap	Net Income Loss NetIncomeLoss	79486000	usd
CY2021	us-gaap	Net Income Loss NetIncomeLoss	72572000	usd
CY2023	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	18508000	usd
CY2022	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	10603000	usd
CY2021	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	19560000	usd
CY2023	us-gaap	Deferred Income Taxes And Tax Credits DeferredIncomeTaxesAndTaxCredits	11900000	usd
CY2022	us-gaap	Deferred Income Taxes And Tax Credits DeferredIncomeTaxesAndTaxCredits	7088000	usd
CY2021	us-gaap	Deferred Income Taxes And Tax Credits DeferredIncomeTaxesAndTaxCredits	-7481000	usd
CY2023	us-gaap	Share Based Compensation ShareBasedCompensation	10830000	usd
CY2022	us-gaap	Share Based Compensation ShareBasedCompensation	16689000	usd
CY2021	us-gaap	Share Based Compensation ShareBasedCompensation	12760000	usd
CY2023	us-gaap	Accretion Expense AccretionExpense	1554000	usd
CY2022	us-gaap	Accretion Expense AccretionExpense	820000	usd
CY2021	us-gaap	Accretion Expense AccretionExpense	486000	usd
CY2023	us-gaap	Asset Impairment Charges AssetImpairmentCharges	7246000	usd
CY2022	us-gaap	Asset Impairment Charges AssetImpairmentCharges	0	usd
CY2021	us-gaap	Asset Impairment Charges AssetImpairmentCharges	0	usd
CY2023	us-gaap	Gain Loss On Investments GainLossOnInvestments	2918000	usd
CY2022	us-gaap	Gain Loss On Investments GainLossOnInvestments	2406000	usd
CY2021	us-gaap	Gain Loss On Investments GainLossOnInvestments	1000	usd
CY2023	us-gaap	Gain Loss On Disposition Of Assets1 GainLossOnDispositionOfAssets1	-209000	usd
CY2022	us-gaap	Gain Loss On Disposition Of Assets1 GainLossOnDispositionOfAssets1	-392000	usd
CY2021	us-gaap	Gain Loss On Disposition Of Assets1 GainLossOnDispositionOfAssets1	-135000	usd
CY2023	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-6913000	usd
CY2022	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-4522000	usd
CY2021	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	36819000	usd
CY2023	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-131000	usd
CY2022	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-5731000	usd
CY2021	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-332000	usd
CY2023	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	-145118000	usd
CY2022	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	32892000	usd
CY2021	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	230177000	usd
CY2023	us-gaap	Restructuring Reserve Accrual Adjustment1 RestructuringReserveAccrualAdjustment1	0	usd
CY2022	us-gaap	Restructuring Reserve Accrual Adjustment1 RestructuringReserveAccrualAdjustment1	0	usd
CY2021	us-gaap	Restructuring Reserve Accrual Adjustment1 RestructuringReserveAccrualAdjustment1	-5061000	usd
CY2023	us-gaap	Increase Decrease In Deferred Revenue IncreaseDecreaseInDeferredRevenue	2035000	usd
CY2022	us-gaap	Increase Decrease In Deferred Revenue IncreaseDecreaseInDeferredRevenue	-7237000	usd
CY2021	us-gaap	Increase Decrease In Deferred Revenue IncreaseDecreaseInDeferredRevenue	12783000	usd
CY2023	us-gaap	Increase Decrease In Income Taxes Payable Net Of Income Taxes Receivable IncreaseDecreaseInIncomeTaxesPayableNetOfIncomeTaxesReceivable	-6692000	usd
CY2022	us-gaap	Increase Decrease In Income Taxes Payable Net Of Income Taxes Receivable IncreaseDecreaseInIncomeTaxesPayableNetOfIncomeTaxesReceivable	-13606000	usd
CY2021	us-gaap	Increase Decrease In Income Taxes Payable Net Of Income Taxes Receivable IncreaseDecreaseInIncomeTaxesPayableNetOfIncomeTaxesReceivable	11377000	usd
CY2023	us-gaap	Increase Decrease In Pension Plan Obligations IncreaseDecreaseInPensionPlanObligations	7493000	usd
CY2022	us-gaap	Increase Decrease In Pension Plan Obligations IncreaseDecreaseInPensionPlanObligations	-479000	usd
CY2023	us-gaap	Increase Decrease In Prepaid Expense IncreaseDecreaseInPrepaidExpense	-1233000	usd
CY2021	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	37124000	usd
CY2022	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	119288000	usd
CY2021	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	271401000	usd
CY2023	us-gaap	Payments To Acquire Businesses Gross PaymentsToAcquireBusinessesGross	49858000	usd
CY2022	us-gaap	Payments To Acquire Businesses Gross PaymentsToAcquireBusinessesGross	0	usd
CY2021	us-gaap	Payments To Acquire Businesses Gross PaymentsToAcquireBusinessesGross	33518000	usd
CY2023	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	13433000	usd
CY2022	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	11134000	usd
CY2021	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	6240000	usd
CY2023	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	140982000	usd
CY2022	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	269824000	usd
CY2021	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	2323000	usd
CY2023	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	337872000	usd
CY2022	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	1359000	usd
CY2021	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	20822000	usd
CY2023	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	133599000	usd
CY2022	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-279599000	usd
CY2021	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-21259000	usd
CY2023	us-gaap	Payments Of Dividends PaymentsOfDividends	12537000	usd
CY2022	us-gaap	Payments Of Dividends PaymentsOfDividends	12466000	usd
CY2021	us-gaap	Payments Of Dividends PaymentsOfDividends	12377000	usd
CY2023	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	4141000	usd
CY2022	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	3219000	usd
CY2021	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	3140000	usd
CY2023	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	904000	usd
CY2022	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	0	usd
CY2021	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	0	usd
CY2023	us-gaap	Payment For Contingent Consideration Liability Financing Activities PaymentForContingentConsiderationLiabilityFinancingActivities	35946000	usd
CY2022	us-gaap	Payment For Contingent Consideration Liability Financing Activities PaymentForContingentConsiderationLiabilityFinancingActivities	0	usd
CY2021	us-gaap	Payment For Contingent Consideration Liability Financing Activities PaymentForContingentConsiderationLiabilityFinancingActivities	0	usd
CY2023	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-53528000	usd
CY2022	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-15685000	usd
CY2021	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-15517000	usd
CY2023	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	3850000	usd
CY2022	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	-13774000	usd
CY2021	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	-5855000	usd
CY2023	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	57129000	usd
CY2022	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-189770000	usd
CY2021	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	228770000	usd
CY2022Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	355489000	usd
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	545259000	usd
CY2023	us-gaap	Income Taxes Paid IncomeTaxesPaid	22137000	usd
CY2022	us-gaap	Income Taxes Paid IncomeTaxesPaid	41910000	usd
CY2021	us-gaap	Income Taxes Paid IncomeTaxesPaid	28623000	usd
CY2020Q4	us-gaap	Stockholders Equity StockholdersEquity	267602000	usd
CY2021	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	-3140000	usd
CY2021	us-gaap	Stock Issued During Period Value Treasury Stock Reissued StockIssuedDuringPeriodValueTreasuryStockReissued	345000	usd
CY2021	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.60
CY2021	us-gaap	Dividends Cash DividendsCash	11708000	usd
CY2021	us-gaap	Dividends Share Based Compensation Cash DividendsShareBasedCompensationCash	669000	usd
CY2021Q4	us-gaap	Stockholders Equity StockholdersEquity	336020000	usd
CY2022	us-gaap	Net Income Loss NetIncomeLoss	79486000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-5864000	usd
CY2022	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	16689000	usd
CY2022	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	-3219000	usd
CY2022	us-gaap	Stock Issued During Period Value Treasury Stock Reissued StockIssuedDuringPeriodValueTreasuryStockReissued	0	usd
CY2022	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.60
CY2022	us-gaap	Dividends Cash DividendsCash	11857000	usd
CY2022	us-gaap	Dividends Share Based Compensation Cash DividendsShareBasedCompensationCash	609000	usd
CY2022Q4	us-gaap	Stockholders Equity StockholdersEquity	410646000	usd
CY2023	us-gaap	Net Income Loss NetIncomeLoss	54410000	usd
CY2023	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	4318000	usd
CY2023	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	10830000	usd
CY2023	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	-4141000	usd
CY2023	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	904000	usd
CY2023	hsii	Stock Issued During Period Value Clawback StockIssuedDuringPeriodValueClawback	344000	usd
CY2023	us-gaap	Stock Issued During Period Value Treasury Stock Reissued StockIssuedDuringPeriodValueTreasuryStockReissued	0	usd
CY2023	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.60
CY2023	us-gaap	Dividends Cash DividendsCash	12043000	usd
CY2023	us-gaap	Dividends Share Based Compensation Cash DividendsShareBasedCompensationCash	494000	usd
CY2023Q4	us-gaap	Stockholders Equity StockholdersEquity	462278000	usd
CY2023	hsii	Cash And Cash Equivalents Maximum Maturity Period CashAndCashEquivalentsMaximumMaturityPeriod	P3M
CY2023	us-gaap	Concentration Risk Credit Risk ConcentrationRiskCreditRisk	<div style="text-align:justify;text-indent:18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Concentration of Risk</span></div><div style="text-align:justify;text-indent:18pt"><span><br/></span></div><div style="text-align:justify;text-indent:18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Company is potentially exposed to concentrations of risk associated with its accounts receivable. However, this risk is limited due to the Company’s large number of clients and their dispersion across many different industries and geographies. At December 31, 2023 and 2022, the Company had no significant concentrations of risk.</span></div>
CY2022	us-gaap	Concentration Risk Customer ConcentrationRiskCustomer	no
CY2023	us-gaap	Concentration Risk Customer ConcentrationRiskCustomer	no
CY2023Q4	us-gaap	Contract With Customer Asset Gross Current ContractWithCustomerAssetGrossCurrent	32092000	usd
CY2022Q4	us-gaap	Contract With Customer Asset Gross Current ContractWithCustomerAssetGrossCurrent	35288000	usd
CY2023	us-gaap	Increase Decrease In Contract With Customer Asset IncreaseDecreaseInContractWithCustomerAsset	-3196000	usd
CY2023Q4	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	45732000	usd
CY2023Q4	us-gaap	Deferred Revenue Current DeferredRevenueCurrent	45732000	usd
CY2022Q4	us-gaap	Deferred Revenue Current DeferredRevenueCurrent	43057000	usd
CY2022Q4	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	43057000	usd
CY2023	us-gaap	Increase Decrease In Contract With Customer Liability IncreaseDecreaseInContractWithCustomerLiability	2675000	usd
CY2023	us-gaap	Contract With Customer Liability Revenue Recognized ContractWithCustomerLiabilityRevenueRecognized	39400000	usd
CY2023	us-gaap	Contract With Customer Performance Obligation Satisfied In Previous Period ContractWithCustomerPerformanceObligationSatisfiedInPreviousPeriod	19900000	usd
CY2023	us-gaap	Number Of Reporting Units NumberOfReportingUnits	5	reporting_unit
CY2023	hsii	Vesting Period Of Deferred Cash Bonuses VestingPeriodOfDeferredCashBonuses	P3Y
CY2023	hsii	Variation Percentage Of Deferred Cash Bonuses VariationPercentageOfDeferredCashBonuses	0.15
CY2023	hsii	Additional Vesting Period After Deferral Date For Bonus Payment AdditionalVestingPeriodAfterDeferralDateForBonusPayment	P3Y
CY2021Q3	hsii	Early Termination Agreement Payment EarlyTerminationAgreementPayment	11700000	usd
CY2023	us-gaap	Net Income Loss NetIncomeLoss	54410000	usd
CY2022	us-gaap	Net Income Loss NetIncomeLoss	79486000	usd
CY2021	us-gaap	Net Income Loss NetIncomeLoss	72572000	usd
CY2023	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	20029000	shares
CY2022	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	19758000	shares
CY2021	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	19515000	shares
CY2023	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	20766000	shares
CY2022	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	20618000	shares
CY2021	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	20296000	shares
CY2023	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.72
CY2022	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	4.02
CY2021	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	3.72
CY2023	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.62
CY2022	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	3.86
CY2021	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	3.58
CY2021	us-gaap	Restructuring Reserve Accelerated Depreciation RestructuringReserveAcceleratedDepreciation	900000	usd
CY2022Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	355447000	usd
CY2021Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	545225000	usd
CY2021Q4	us-gaap	Restricted Cash RestrictedCash	34000	usd
CY2023	us-gaap	Revenue Performance Obligation Description Of Timing RevenuePerformanceObligationDescriptionOfTiming	six months
CY2023Q4	us-gaap	Unbilled Contracts Receivable UnbilledContractsReceivable	15318000	usd
CY2022Q4	us-gaap	Unbilled Contracts Receivable UnbilledContractsReceivable	13940000	usd
CY2023	hsii	Increase Decrease In Unbilled Contracts Receivable IncreaseDecreaseInUnbilledContractsReceivable	1378000	usd
CY2023Q4	us-gaap	Contract With Customer Asset Net ContractWithCustomerAssetNet	16774000	usd
CY2022Q4	us-gaap	Contract With Customer Asset Net ContractWithCustomerAssetNet	21348000	usd
CY2023	hsii	Increase Decrease In Contract With Customer After Allowance For Credit Loss IncreaseDecreaseInContractWithCustomerAfterAllowanceForCreditLoss	-4574000	usd
CY2022Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	6643000	usd
CY2021Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	5666000	usd
CY2020Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	6557000	usd
CY2023	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	9574000	usd
CY2022	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	7938000	usd
CY2021	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	4991000	usd
CY2023	us-gaap	Allowance For Doubtful Accounts Receivable Write Offs AllowanceForDoubtfulAccountsReceivableWriteOffs	9275000	usd
CY2022	us-gaap	Allowance For Doubtful Accounts Receivable Write Offs AllowanceForDoubtfulAccountsReceivableWriteOffs	6830000	usd
CY2021	us-gaap	Allowance For Doubtful Accounts Receivable Write Offs AllowanceForDoubtfulAccountsReceivableWriteOffs	5730000	usd
CY2023	hsii	Accounts Receivable Allowance For Credit Loss Foreign Currency Translation AccountsReceivableAllowanceForCreditLossForeignCurrencyTranslation	12000	usd
CY2022	hsii	Accounts Receivable Allowance For Credit Loss Foreign Currency Translation AccountsReceivableAllowanceForCreditLossForeignCurrencyTranslation	-131000	usd
CY2021	hsii	Accounts Receivable Allowance For Credit Loss Foreign Currency Translation AccountsReceivableAllowanceForCreditLossForeignCurrencyTranslation	-152000	usd
CY2023Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	6954000	usd
CY2022Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	6643000	usd
CY2021Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	5666000	usd
CY2023Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Number Of Positions DebtSecuritiesAvailableForSaleUnrealizedLossPositionNumberOfPositions	0	position
CY2022Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Number Of Positions DebtSecuritiesAvailableForSaleUnrealizedLossPositionNumberOfPositions	1	investment
CY2023Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	98623000	usd
CY2022Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	85236000	usd
CY2023Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	62871000	usd
CY2022Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	55029000	usd
CY2023Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	35752000	usd
CY2022Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	30207000	usd
CY2023	us-gaap	Depreciation Depreciation	9100000	usd
CY2022	us-gaap	Depreciation Depreciation	7400000	usd
CY2021	us-gaap	Depreciation Depreciation	7100000	usd
CY2021Q3	hsii	Lease Liability Associated With Surrendered Office LeaseLiabilityAssociatedWithSurrenderedOffice	17400000	usd
CY2021	hsii	Gain On Early Termination Agreement GainOnEarlyTerminationAgreement	5700000	usd
CY2023	us-gaap	Operating Lease Cost OperatingLeaseCost	19587000	usd
CY2022	us-gaap	Operating Lease Cost OperatingLeaseCost	17408000	usd
CY2023	us-gaap	Variable Lease Cost VariableLeaseCost	9225000	usd
CY2022	us-gaap	Variable Lease Cost VariableLeaseCost	6116000	usd
CY2023	us-gaap	Lease Cost LeaseCost	28812000	usd
CY2022	us-gaap	Lease Cost LeaseCost	23524000	usd
CY2023	us-gaap	Operating Lease Payments OperatingLeasePayments	20856000	usd
CY2022	us-gaap	Operating Lease Payments OperatingLeasePayments	18865000	usd
CY2023	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	34982000	usd
CY2022	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	18055000	usd
CY2023Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P7Y3M18D
CY2022Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P6Y3M18D
CY2023Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0482
CY2022Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0348
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	21095000	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	16384000	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	14997000	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	14698000	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	11225000	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	43008000	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	121407000	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	21705000	usd
CY2023Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	99702000	usd
CY2022Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	3300000	usd
CY2021Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	2800000	usd
CY2023Q4	us-gaap	Debt Securities Available For Sale Amortized Cost Excluding Accrued Interest After Allowance For Credit Loss DebtSecuritiesAvailableForSaleAmortizedCostExcludingAccruedInterestAfterAllowanceForCreditLoss	242228000	usd
CY2023Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	42000	usd
CY2023Q4	us-gaap	Debt Securities Available For Sale Excluding Accrued Interest DebtSecuritiesAvailableForSaleExcludingAccruedInterest	242270000	usd
CY2023Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	412618000	usd
CY2023Q4	us-gaap	Marketable Securities MarketableSecurities	65538000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Amortized Cost Excluding Accrued Interest After Allowance For Credit Loss DebtSecuritiesAvailableForSaleAmortizedCostExcludingAccruedInterestAfterAllowanceForCreditLoss	312121000	usd
CY2022Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	15000	usd
CY2022Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	56000	usd
CY2023Q4	hsii	Aggregate Cost Basis For Non Qualified Deferred Compensation Plan AggregateCostBasisForNonQualifiedDeferredCompensationPlan	37200000	usd
CY2022Q4	hsii	Aggregate Cost Basis For Non Qualified Deferred Compensation Plan AggregateCostBasisForNonQualifiedDeferredCompensationPlan	29100000	usd
CY2023Q4	us-gaap	Fair Value Net Asset Liability FairValueNetAssetLiability	45265000	usd
CY2022Q4	us-gaap	Fair Value Net Asset Liability FairValueNetAssetLiability	32987000	usd
CY2022	hsii	Fair Value Recurring Basis Unobservable Input Reconciliation Liability Gain Loss Statement Of Income Extensible List Not Disclosed Flag FairValueRecurringBasisUnobservableInputReconciliationLiabilityGainLossStatementOfIncomeExtensibleListNotDisclosedFlag	Compensation expense
CY2023	hsii	Fair Value Recurring Basis Unobservable Input Reconciliation Liability Gain Loss Statement Of Income Extensible List Not Disclosed Flag FairValueRecurringBasisUnobservableInputReconciliationLiabilityGainLossStatementOfIncomeExtensibleListNotDisclosedFlag	Compensation expense
CY2023	hsii	Fair Value Recurring Basis Unobservable Input Reconciliation Liability Gain Loss Statement Of Other Comprehensive Income Extensible List Not Disclosed Flag FairValueRecurringBasisUnobservableInputReconciliationLiabilityGainLossStatementOfOtherComprehensiveIncomeExtensibleListNotDisclosedFlag	Foreign currency translation
CY2022	hsii	Fair Value Recurring Basis Unobservable Input Reconciliation Liability Gain Loss Statement Of Other Comprehensive Income Extensible List Not Disclosed Flag FairValueRecurringBasisUnobservableInputReconciliationLiabilityGainLossStatementOfOtherComprehensiveIncomeExtensibleListNotDisclosedFlag	Foreign currency translation
CY2022Q4	us-gaap	Goodwill Goodwill	138361000	usd
CY2023	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	69444000	usd
CY2023	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	7246000	usd
CY2023	us-gaap	Goodwill Foreign Currency Translation Gain Loss GoodwillForeignCurrencyTranslationGainLoss	1693000	usd
CY2023Q4	us-gaap	Goodwill Goodwill	202252000	usd
CY2021	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	2900000	usd
CY2023Q4	us-gaap	Defined Benefit Plan Expected Future Benefit Payments Year Two DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo	1267000	usd
CY2023Q4	us-gaap	Defined Benefit Plan Expected Future Benefit Payments Year Three DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree	1239000	usd
CY2023Q4	us-gaap	Defined Benefit Plan Expected Future Benefit Payments Year Four DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour	1206000	usd
CY2023Q4	us-gaap	Defined Benefit Plan Expected Future Benefit Payments Year Five DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive	1168000	usd
CY2023Q4	us-gaap	Defined Benefit Plan Expected Future Benefit Payments Five Fiscal Years Thereafter DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter	5103000	usd
CY2023Q4	us-gaap	Goodwill Goodwill	202252000	usd
CY2022Q4	us-gaap	Goodwill Goodwill	138361000	usd
CY2020Q4	us-gaap	Goodwill Impaired Accumulated Impairment Loss GoodwillImpairedAccumulatedImpairmentLoss	32970000	usd
CY2020Q4	us-gaap	Goodwill Goodwill	91643000	usd
CY2021	us-gaap	Goodwill Foreign Currency Translation Gain Loss GoodwillForeignCurrencyTranslationGainLoss	-180000	usd
CY2021Q4	us-gaap	Goodwill Goodwill	138524000	usd
CY2022	us-gaap	Goodwill Foreign Currency Translation Gain Loss GoodwillForeignCurrencyTranslationGainLoss	-163000	usd
CY2022Q4	us-gaap	Goodwill Goodwill	138361000	usd
CY2023	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	7246000	usd
CY2023	us-gaap	Goodwill Foreign Currency Translation Gain Loss GoodwillForeignCurrencyTranslationGainLoss	1693000	usd
CY2023Q4	us-gaap	Goodwill Gross GoodwillGross	242468000	usd
CY2023Q4	us-gaap	Goodwill Impaired Accumulated Impairment Loss GoodwillImpairedAccumulatedImpairmentLoss	40216000	usd
CY2023Q4	us-gaap	Goodwill Goodwill	202252000	usd
CY2023	us-gaap	Number Of Reporting Units NumberOfReportingUnits	5	unit
CY2023Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	20842000	usd
CY2022Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	6333000	usd
CY2023	us-gaap	Acquired Finite Lived Intangible Assets Weighted Average Useful Life AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife	P7Y10M24D
CY2023Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	39891000	usd
CY2023Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	19049000	usd
CY2023Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	20842000	usd
CY2022Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	16236000	usd
CY2022Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	9903000	usd
CY2022Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	6333000	usd
CY2023	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	9400000	usd
CY2022	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	3200000	usd
CY2023Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	7780000	usd
CY2023Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	5971000	usd
CY2023Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	2525000	usd
CY2023Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	1534000	usd
CY2023Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Five FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	897000	usd
CY2023Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense After Year Five FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive	2135000	usd
CY2023Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	20842000	usd
CY2023Q4	hsii	Acquisition Earnout Accruals Current AcquisitionEarnoutAccrualsCurrent	0	usd
CY2022Q4	hsii	Acquisition Earnout Accruals Current AcquisitionEarnoutAccrualsCurrent	36010000	usd
CY2023Q4	us-gaap	Other Sundry Liabilities Current OtherSundryLiabilitiesCurrent	21823000	usd
CY2022Q4	us-gaap	Other Sundry Liabilities Current OtherSundryLiabilitiesCurrent	20006000	usd
CY2023Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	21823000	usd
CY2022Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	56016000	usd
CY2023Q4	hsii	Acquisition Earnout Accruals Non Current AcquisitionEarnoutAccrualsNonCurrent	38601000	usd
CY2022Q4	hsii	Acquisition Earnout Accruals Non Current AcquisitionEarnoutAccrualsNonCurrent	0	usd
CY2023Q4	us-gaap	Other Sundry Liabilities Noncurrent OtherSundryLiabilitiesNoncurrent	3207000	usd
CY2022Q4	us-gaap	Other Sundry Liabilities Noncurrent OtherSundryLiabilitiesNoncurrent	5293000	usd
CY2023Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	41808000	usd
CY2022Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	5293000	usd
CY2022Q4	us-gaap	Other Postretirement Defined Benefit Plan Liabilities Current And Noncurrent OtherPostretirementDefinedBenefitPlanLiabilitiesCurrentAndNoncurrent	13951000	usd
CY2023Q2	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Additional Shares Authorized ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized	1060000	shares
CY2023Q4	hsii	Share Based Compensation Arrangement By Share Based Payment Award Shares Issued To Date ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesIssuedToDate	4166113	shares
CY2023Q4	hsii	Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Forfeited To Date ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesForfeitedToDate	784325	shares
CY2022	hsii	Defined Contribution Plan Employer Matching Contribution Amount DefinedContributionPlanEmployerMatchingContributionAmount	6000	usd
CY2021	hsii	Defined Contribution Plan Employer Matching Contribution Amount DefinedContributionPlanEmployerMatchingContributionAmount	6000	usd
CY2023	hsii	Defined Contribution Plan Employer Matching Contribution Amount DefinedContributionPlanEmployerMatchingContributionAmount	6000	usd
CY2022	us-gaap	Defined Contribution Plan Employer Matching Contribution Percent Of Match DefinedContributionPlanEmployerMatchingContributionPercentOfMatch	0.060
CY2023	us-gaap	Defined Contribution Plan Employer Matching Contribution Percent Of Match DefinedContributionPlanEmployerMatchingContributionPercentOfMatch	0.060
CY2021	us-gaap	Defined Contribution Plan Employer Matching Contribution Percent Of Match DefinedContributionPlanEmployerMatchingContributionPercentOfMatch	0.060
CY2021	us-gaap	Defined Contribution Plan Employer Discretionary Contribution Amount DefinedContributionPlanEmployerDiscretionaryContributionAmount	0	usd
CY2023	us-gaap	Defined Contribution Plan Employer Discretionary Contribution Amount DefinedContributionPlanEmployerDiscretionaryContributionAmount	0	usd
CY2022	us-gaap	Defined Contribution Plan Employer Discretionary Contribution Amount DefinedContributionPlanEmployerDiscretionaryContributionAmount	0	usd
CY2022Q4	us-gaap	Defined Benefit Plan Benefit Obligation DefinedBenefitPlanBenefitObligation	13951000	usd
CY2021Q4	us-gaap	Defined Benefit Plan Benefit Obligation DefinedBenefitPlanBenefitObligation	19594000	usd
CY2023	hsii	Defined Benefit Plan Net Periodic Benefit Cost Credit Interest Cost Statement Of Income Or Comprehensive Income Extensible List Not Disclosed Flag DefinedBenefitPlanNetPeriodicBenefitCostCreditInterestCostStatementOfIncomeOrComprehensiveIncomeExtensibleListNotDisclosedFlag	Interest cost
CY2022	hsii	Defined Benefit Plan Net Periodic Benefit Cost Credit Interest Cost Statement Of Income Or Comprehensive Income Extensible List Not Disclosed Flag DefinedBenefitPlanNetPeriodicBenefitCostCreditInterestCostStatementOfIncomeOrComprehensiveIncomeExtensibleListNotDisclosedFlag	Interest cost
CY2023	us-gaap	Defined Benefit Plan Interest Cost DefinedBenefitPlanInterestCost	555000	usd
CY2022	us-gaap	Defined Benefit Plan Interest Cost DefinedBenefitPlanInterestCost	181000	usd
CY2023	us-gaap	Defined Benefit Plan Actuarial Gain Loss DefinedBenefitPlanActuarialGainLoss	769000	usd
CY2022	us-gaap	Defined Benefit Plan Actuarial Gain Loss DefinedBenefitPlanActuarialGainLoss	-3361000	usd
CY2023	us-gaap	Defined Benefit Plan Benefit Obligation Benefits Paid DefinedBenefitPlanBenefitObligationBenefitsPaid	1296000	usd
CY2022	us-gaap	Defined Benefit Plan Benefit Obligation Benefits Paid DefinedBenefitPlanBenefitObligationBenefitsPaid	1257000	usd
CY2023	us-gaap	Defined Benefit Plan Foreign Currency Exchange Rate Changes Benefit Obligation DefinedBenefitPlanForeignCurrencyExchangeRateChangesBenefitObligation	437000	usd
CY2022	us-gaap	Defined Benefit Plan Foreign Currency Exchange Rate Changes Benefit Obligation DefinedBenefitPlanForeignCurrencyExchangeRateChangesBenefitObligation	-1206000	usd
CY2023Q4	us-gaap	Defined Benefit Plan Benefit Obligation DefinedBenefitPlanBenefitObligation	14416000	usd
CY2022Q4	us-gaap	Defined Benefit Plan Benefit Obligation DefinedBenefitPlanBenefitObligation	13951000	usd
CY2023Q4	us-gaap	Pension And Other Postretirement And Postemployment Benefit Plans Liabilities Current PensionAndOtherPostretirementAndPostemploymentBenefitPlansLiabilitiesCurrent	1289000	usd
CY2022Q4	us-gaap	Pension And Other Postretirement And Postemployment Benefit Plans Liabilities Current PensionAndOtherPostretirementAndPostemploymentBenefitPlansLiabilitiesCurrent	1252000	usd
CY2023Q4	us-gaap	Pension And Other Postretirement And Postemployment Benefit Plans Liabilities Noncurrent PensionAndOtherPostretirementAndPostemploymentBenefitPlansLiabilitiesNoncurrent	13127000	usd
CY2022Q4	us-gaap	Pension And Other Postretirement And Postemployment Benefit Plans Liabilities Noncurrent PensionAndOtherPostretirementAndPostemploymentBenefitPlansLiabilitiesNoncurrent	12699000	usd
CY2023Q4	us-gaap	Other Postretirement Defined Benefit Plan Liabilities Current And Noncurrent OtherPostretirementDefinedBenefitPlanLiabilitiesCurrentAndNoncurrent	14416000	usd
CY2023	us-gaap	Defined Benefit Plan Interest Cost DefinedBenefitPlanInterestCost	555000	usd
CY2022	us-gaap	Defined Benefit Plan Interest Cost DefinedBenefitPlanInterestCost	181000	usd
CY2021	us-gaap	Defined Benefit Plan Interest Cost DefinedBenefitPlanInterestCost	150000	usd
CY2022	hsii	Defined Benefit Plan Net Periodic Benefit Cost Credit Amortization Of Gain Loss Statement Of Income Or Comprehensive Income Extensible List Not Disclosed Flag DefinedBenefitPlanNetPeriodicBenefitCostCreditAmortizationOfGainLossStatementOfIncomeOrComprehensiveIncomeExtensibleListNotDisclosedFlag	Amortization of net loss
CY2021	hsii	Defined Benefit Plan Net Periodic Benefit Cost Credit Amortization Of Gain Loss Statement Of Income Or Comprehensive Income Extensible List Not Disclosed Flag DefinedBenefitPlanNetPeriodicBenefitCostCreditAmortizationOfGainLossStatementOfIncomeOrComprehensiveIncomeExtensibleListNotDisclosedFlag	Amortization of net loss
CY2023	hsii	Defined Benefit Plan Net Periodic Benefit Cost Credit Amortization Of Gain Loss Statement Of Income Or Comprehensive Income Extensible List Not Disclosed Flag DefinedBenefitPlanNetPeriodicBenefitCostCreditAmortizationOfGainLossStatementOfIncomeOrComprehensiveIncomeExtensibleListNotDisclosedFlag	Amortization of net loss
CY2023	us-gaap	Defined Benefit Plan Amortization Of Gains Losses DefinedBenefitPlanAmortizationOfGainsLosses	0	usd
CY2022	us-gaap	Defined Benefit Plan Amortization Of Gains Losses DefinedBenefitPlanAmortizationOfGainsLosses	-195000	usd
CY2021	us-gaap	Defined Benefit Plan Amortization Of Gains Losses DefinedBenefitPlanAmortizationOfGainsLosses	-211000	usd
CY2023	us-gaap	Defined Benefit Plan Net Periodic Benefit Cost DefinedBenefitPlanNetPeriodicBenefitCost	555000	usd
CY2022	us-gaap	Defined Benefit Plan Net Periodic Benefit Cost DefinedBenefitPlanNetPeriodicBenefitCost	376000	usd
CY2021	us-gaap	Defined Benefit Plan Net Periodic Benefit Cost DefinedBenefitPlanNetPeriodicBenefitCost	361000	usd
CY2023	us-gaap	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Discount Rate DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate	0.0409
CY2022	us-gaap	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Discount Rate DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate	0.0103
CY2021	us-gaap	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Discount Rate DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate	0.0072
CY2023	us-gaap	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Rate Of Compensation Increase DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostRateOfCompensationIncrease	0
CY2022	us-gaap	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Rate Of Compensation Increase DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostRateOfCompensationIncrease	0
CY2021	us-gaap	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Rate Of Compensation Increase DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostRateOfCompensationIncrease	0
CY2023Q4	us-gaap	Defined Benefit Plan Assumptions Used Calculating Benefit Obligation Discount Rate DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate	0.0345
CY2022Q4	us-gaap	Defined Benefit Plan Assumptions Used Calculating Benefit Obligation Discount Rate DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate	0.0409
CY2021Q4	us-gaap	Defined Benefit Plan Assumptions Used Calculating Benefit Obligation Discount Rate DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate	0.0103
CY2023Q4	us-gaap	Defined Benefit Plan Assumptions Used Calculating Benefit Obligation Rate Of Compensation Increase DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRateOfCompensationIncrease	0
CY2022Q4	us-gaap	Defined Benefit Plan Assumptions Used Calculating Benefit Obligation Rate Of Compensation Increase DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRateOfCompensationIncrease	0
CY2021Q4	us-gaap	Defined Benefit Plan Assumptions Used Calculating Benefit Obligation Rate Of Compensation Increase DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRateOfCompensationIncrease	0
CY2023	hsii	Defined Benefit Plan Assumptions Used Calculating Benefit Obligation Measurement Date DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationMeasurementDate	2023-12-31
CY2022	hsii	Defined Benefit Plan Assumptions Used Calculating Benefit Obligation Measurement Date DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationMeasurementDate	2022-12-31
CY2021	hsii	Defined Benefit Plan Assumptions Used Calculating Benefit Obligation Measurement Date DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationMeasurementDate	2021-12-31
CY2023Q4	hsii	Defined Benefit Plan Amounts In Accumulated Other Comprehensive Income Not Yet Recognized In Net Periodic Benefit Cost DefinedBenefitPlanAmountsInAccumulatedOtherComprehensiveIncomeNotYetRecognizedInNetPeriodicBenefitCost	1400000	usd
CY2022Q4	hsii	Defined Benefit Plan Amounts In Accumulated Other Comprehensive Income Not Yet Recognized In Net Periodic Benefit Cost DefinedBenefitPlanAmountsInAccumulatedOtherComprehensiveIncomeNotYetRecognizedInNetPeriodicBenefitCost	700000	usd
CY2023Q4	us-gaap	Defined Benefit Plan Fair Value Of Plan Assets DefinedBenefitPlanFairValueOfPlanAssets	12400000	usd
CY2022Q4	us-gaap	Defined Benefit Plan Fair Value Of Plan Assets DefinedBenefitPlanFairValueOfPlanAssets	12600000	usd
CY2023Q4	us-gaap	Defined Benefit Plan Expected Future Employer Contributions Next Fiscal Year DefinedBenefitPlanExpectedFutureEmployerContributionsNextFiscalYear	1289000	usd
CY2023Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Available For Grant ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant	1028212	shares
CY2023	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	3220000	usd
CY2022	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	4263000	usd
CY2021	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	5539000	usd
CY2023	us-gaap	Stock Issued During Period Shares Issued For Services StockIssuedDuringPeriodSharesIssuedForServices	16134	shares
CY2022	us-gaap	Stock Issued During Period Shares Issued For Services StockIssuedDuringPeriodSharesIssuedForServices	11850	shares
CY2008Q1	us-gaap	Stock Repurchase Program Authorized Amount1 StockRepurchaseProgramAuthorizedAmount1	50000000	usd
CY2023	us-gaap	Treasury Stock Shares Acquired TreasuryStockSharesAcquired	36000	shares
CY2023	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	900000	usd
CY2022	us-gaap	Treasury Stock Shares Acquired TreasuryStockSharesAcquired	0	shares
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CY2023Q4	hsii	Treasury Stock Value Acquired To Date TreasuryStockValueAcquiredToDate	29200000	usd
CY2023Q4	us-gaap	Stock Repurchase Program Remaining Authorized Repurchase Amount1 StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1	20800000	usd
CY2023	us-gaap	Restructuring Charges RestructuringCharges	0	usd
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CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	68122000	usd
CY2023	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	36099000	usd
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CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	37907000	usd
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CY2022	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	115236000	usd
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CY2022	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	5475000	usd
CY2021	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	4994000	usd
CY2023	us-gaap	Income Tax Reconciliation Nondeductible Expense IncomeTaxReconciliationNondeductibleExpense	8437000	usd
CY2022	us-gaap	Income Tax Reconciliation Nondeductible Expense IncomeTaxReconciliationNondeductibleExpense	4036000	usd
CY2021	us-gaap	Income Tax Reconciliation Nondeductible Expense IncomeTaxReconciliationNondeductibleExpense	2833000	usd
CY2023	us-gaap	Income Tax Reconciliation Foreign Income Tax Rate Differential IncomeTaxReconciliationForeignIncomeTaxRateDifferential	4158000	usd
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CY2022	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	8813000	usd
CY2021	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	9802000	usd
CY2023	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	29374000	usd
CY2022	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	28966000	usd
CY2021	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	40343000	usd
CY2023	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	2996000	usd
CY2022	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	3702000	usd
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CY2021	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-1825000	usd
CY2023	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	557000	usd
CY2022	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	1969000	usd
CY2021	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	-1688000	usd
CY2023	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	4887000	usd
CY2022	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	6784000	usd
CY2021	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-6886000	usd
CY2023	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	34261000	usd
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	35750000	usd
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	33457000	usd
CY2023	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.21
CY2023	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	18621000	usd
CY2022	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	24199000	usd
CY2021	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	22266000	usd
CY2023	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	4974000	usd
CY2022	us-gaap	Income Tax Reconciliation Foreign Income Tax Rate Differential IncomeTaxReconciliationForeignIncomeTaxRateDifferential	1647000	usd
CY2021	us-gaap	Income Tax Reconciliation Foreign Income Tax Rate Differential IncomeTaxReconciliationForeignIncomeTaxRateDifferential	1910000	usd
CY2023	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	-185000	usd
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CY2023	hsii	Effective Income Tax Rate Reconciliation Us Tax On Foreign Dividends EffectiveIncomeTaxRateReconciliationUSTaxOnForeignDividends	-300000	usd
CY2022	hsii	Effective Income Tax Rate Reconciliation Us Tax On Foreign Dividends EffectiveIncomeTaxRateReconciliationUSTaxOnForeignDividends	436000	usd
CY2021	hsii	Effective Income Tax Rate Reconciliation Us Tax On Foreign Dividends EffectiveIncomeTaxRateReconciliationUSTaxOnForeignDividends	242000	usd
CY2023	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-1444000	usd
CY2022	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-43000	usd
CY2021	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	1369000	usd
CY2023	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	34261000	usd
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CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	33457000	usd
CY2023Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Deferred Rent DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsDeferredRent	15490000	usd
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CY2023Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards Foreign DeferredTaxAssetsOperatingLossCarryforwardsForeign	11658000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards Foreign DeferredTaxAssetsOperatingLossCarryforwardsForeign	14528000	usd
CY2023Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeBenefits	12678000	usd
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CY2023Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards Foreign DeferredTaxAssetsTaxCreditCarryforwardsForeign	7820000	usd
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CY2023Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	77406000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	81770000	usd
CY2023Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	22233000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	20724000	usd
CY2023Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	55173000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	61046000	usd
CY2023Q4	us-gaap	Deferred Tax Liabilities Leasing Arrangements DeferredTaxLiabilitiesLeasingArrangements	11715000	usd
CY2022Q4	us-gaap	Deferred Tax Liabilities Leasing Arrangements DeferredTaxLiabilitiesLeasingArrangements	13020000	usd
CY2023Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets Goodwill DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsGoodwill	17731000	usd
CY2022Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets Goodwill DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsGoodwill	9493000	usd
CY2023Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	2731000	usd
CY2022Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	3449000	usd
CY2023Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	1393000	usd
CY2022Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	1592000	usd
CY2023Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	33570000	usd
CY2022Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	27554000	usd
CY2023Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	21603000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	33492000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	20700000	usd
CY2023Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	22200000	usd
CY2022Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	0	usd
CY2021Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	0	usd
CY2020Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	416000	usd
CY2023	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	0	usd
CY2022	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	0	usd
CY2021	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	6000	usd
CY2023	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	0	usd
CY2022	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	0	usd
CY2021	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	14000	usd
CY2023	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	0	usd
CY2022	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	0	usd
CY2021	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	408000	usd
CY2023Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	0	usd
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CY2021Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	0	usd
CY2023	hsii	Income Tax Examination Period Maximum IncomeTaxExaminationPeriodMaximum	P12M
CY2023	us-gaap	Reclassification From Aoci Current Period Net Of Tax Attributable To Parent ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent	4318000	usd
CY2022	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	1073464000	usd
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CY2023	us-gaap	Net Income Loss NetIncomeLoss	54410000	usd
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CY2023	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	11617000	usd
CY2022	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	5337000	usd
CY2021	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	302000	usd
CY2023	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	1697000	usd
CY2022	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-2367000	usd
CY2021	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	7463000	usd
CY2023	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	34261000	usd
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	35750000	usd
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	33457000	usd
CY2023	us-gaap	Operating Income Loss OperatingIncomeLoss	75357000	usd
CY2022	us-gaap	Operating Income Loss OperatingIncomeLoss	112266000	usd
CY2021	us-gaap	Operating Income Loss OperatingIncomeLoss	98264000	usd
CY2023	us-gaap	Depreciation Depreciation	9113000	usd
CY2022	us-gaap	Depreciation Depreciation	7394000	usd
CY2021	us-gaap	Depreciation Depreciation	7150000	usd
CY2023	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	9395000	usd
CY2022	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	3209000	usd
CY2021	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	2898000	usd
CY2023	us-gaap	Accretion Expense AccretionExpense	1554000	usd
CY2022	us-gaap	Accretion Expense AccretionExpense	820000	usd
CY2021	us-gaap	Accretion Expense AccretionExpense	486000	usd
CY2023	hsii	Earnout Fair Value Adjustments EarnoutFairValueAdjustments	0	usd
CY2022	hsii	Earnout Fair Value Adjustments EarnoutFairValueAdjustments	464000	usd
CY2021	hsii	Earnout Fair Value Adjustments EarnoutFairValueAdjustments	-11368000	usd
CY2023	us-gaap	Business Combination Contingent Consideration Arrangements Change In Amount Of Contingent Consideration Liability1 BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1	11934000	usd
CY2022	us-gaap	Business Combination Contingent Consideration Arrangements Change In Amount Of Contingent Consideration Liability1 BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1	3885000	usd
CY2021	us-gaap	Business Combination Contingent Consideration Arrangements Change In Amount Of Contingent Consideration Liability1 BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1	1973000	usd
CY2023	hsii	Deferred Compensation Plan Expense DeferredCompensationPlanExpense	6132000	usd
CY2022	hsii	Deferred Compensation Plan Expense DeferredCompensationPlanExpense	-6232000	usd
CY2021	hsii	Deferred Compensation Plan Expense DeferredCompensationPlanExpense	3057000	usd
CY2023	hsii	Reorganization Costs ReorganizationCosts	4886000	usd
CY2022	hsii	Reorganization Costs ReorganizationCosts	0	usd
CY2021	hsii	Reorganization Costs ReorganizationCosts	0	usd
CY2023	us-gaap	Asset Impairment Charges AssetImpairmentCharges	7246000	usd
CY2022	us-gaap	Asset Impairment Charges AssetImpairmentCharges	0	usd
CY2021	us-gaap	Asset Impairment Charges AssetImpairmentCharges	0	usd
CY2023	us-gaap	Restructuring Charges RestructuringCharges	0	usd
CY2022	us-gaap	Restructuring Charges RestructuringCharges	0	usd
CY2021	us-gaap	Restructuring Charges RestructuringCharges	3792000	usd
CY2023	hsii	Earnings Before Interest Taxes Depreciation And Amortization Adjustments EarningsBeforeInterestTaxesDepreciationAndAmortizationAdjustments	50260000	usd
CY2022	hsii	Earnings Before Interest Taxes Depreciation And Amortization Adjustments EarningsBeforeInterestTaxesDepreciationAndAmortizationAdjustments	8612000	usd
CY2021	hsii	Earnings Before Interest Taxes Depreciation And Amortization Adjustments EarningsBeforeInterestTaxesDepreciationAndAmortizationAdjustments	30724000	usd
CY2023	hsii	Adjusted Earnings Before Interest Taxes Depreciation And Amortization AdjustedEarningsBeforeInterestTaxesDepreciationAndAmortization	125617000	usd
CY2022	hsii	Adjusted Earnings Before Interest Taxes Depreciation And Amortization AdjustedEarningsBeforeInterestTaxesDepreciationAndAmortization	120878000	usd
CY2021	hsii	Adjusted Earnings Before Interest Taxes Depreciation And Amortization AdjustedEarningsBeforeInterestTaxesDepreciationAndAmortization	128988000	usd
CY2023	hsii	Adjusted Earnings Before Interest Taxes Depreciation And Amortization Margin Percentage AdjustedEarningsBeforeInterestTaxesDepreciationAndAmortizationMarginPercentage	0.122
CY2022	hsii	Adjusted Earnings Before Interest Taxes Depreciation And Amortization Margin Percentage AdjustedEarningsBeforeInterestTaxesDepreciationAndAmortizationMarginPercentage	0.113
CY2021	hsii	Adjusted Earnings Before Interest Taxes Depreciation And Amortization Margin Percentage AdjustedEarningsBeforeInterestTaxesDepreciationAndAmortizationMarginPercentage	0.129
CY2023	us-gaap	Revenues Revenues	1041182000	usd
CY2022	us-gaap	Revenues Revenues	1083586000	usd
CY2021	us-gaap	Revenues Revenues	1008474000	usd
CY2023	hsii	Adjusted Earnings Before Interest Taxes Depreciation And Amortization AdjustedEarningsBeforeInterestTaxesDepreciationAndAmortization	125617000	usd
CY2022	hsii	Adjusted Earnings Before Interest Taxes Depreciation And Amortization AdjustedEarningsBeforeInterestTaxesDepreciationAndAmortization	120878000	usd
CY2021	hsii	Adjusted Earnings Before Interest Taxes Depreciation And Amortization AdjustedEarningsBeforeInterestTaxesDepreciationAndAmortization	128988000	usd
CY2023	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	18508000	usd
CY2022	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	10603000	usd
CY2021	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	19560000	usd
CY2023	hsii	Capital Expenditures CapitalExpenditures	13433000	usd
CY2022	hsii	Capital Expenditures CapitalExpenditures	11134000	usd
CY2021	hsii	Capital Expenditures CapitalExpenditures	6240000	usd
CY2023Q4	us-gaap	Assets Current AssetsCurrent	693214000	usd
CY2022Q4	us-gaap	Assets Current AssetsCurrent	823819000	usd
CY2023Q4	hsii	Unallocated Non Current Asset UnallocatedNonCurrentAsset	225283000	usd
CY2022Q4	hsii	Unallocated Non Current Asset UnallocatedNonCurrentAsset	207125000	usd
CY2023Q4	us-gaap	Intangible Assets Net Including Goodwill IntangibleAssetsNetIncludingGoodwill	223094000	usd
CY2022Q4	us-gaap	Intangible Assets Net Including Goodwill IntangibleAssetsNetIncludingGoodwill	144694000	usd
CY2023Q4	us-gaap	Assets Assets	1141591000	usd
CY2022Q4	us-gaap	Assets Assets	1175638000	usd
CY2023Q4	us-gaap	Noncurrent Assets NoncurrentAssets	250600000	usd
CY2022Q4	us-gaap	Noncurrent Assets NoncurrentAssets	260600000	usd
CY2023Q4	us-gaap	Guarantee Obligations Maximum Exposure GuaranteeObligationsMaximumExposure	4500000	usd

Files In Submission

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$HSII
HEIDRICK & STRUGGLES INTERNATIONAL INC Stock $hsii

2024 Q1 Form 10-K Financial Statement

#000106660524000008 Filed on March 04, 2024

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$HSII HEIDRICK & STRUGGLES INTERNATIONAL INC Stock $hsii

2024 Q1 Form 10-K Financial Statement

#000106660524000008 Filed on March 04, 2024

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$HSII
HEIDRICK & STRUGGLES INTERNATIONAL INC Stock $hsii