XML 47 R37.htm IDEA: XBRL DOCUMENT
v3.22.2

Summary of Significant Accounting Policies - Company's Income from Investments Held in Employee Deferred Compensation Trusts (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2022 | Jun. 30, 2021 | Jun. 30, 2022 | Jun. 30, 2021
Accounting Policies [Abstract] |  |  |  |
Dividend income | $ (2,315) | $ (2,556) | $ (2,610) | $ (2,848)
Realized and unrealized (gains) losses | 67,937 | (25,254) | 98,233 | (36,949)
(Income) loss from investments held in employee deferred compensation trusts | $ 65,622 | $ (27,810) | $ 95,623 | $ (39,797)

X
- Definition Deferred Compensation Plan, Dividend Income + References No definition available. + Details
Name: | rhi_DeferredCompensationPlanDividendIncome
Namespace Prefix: | rhi_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Deferred Compensation Plan, Investment Income + References No definition available. + Details
Name: | rhi_DeferredCompensationPlanInvestmentIncome
Namespace Prefix: | rhi_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Deferred Compensation Plan, Realized and Unrealized Gain (Loss) + References No definition available. + Details
Name: | rhi_DeferredCompensationPlanRealizedAndUnrealizedGainLoss
Namespace Prefix: | rhi_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_AccountingPoliciesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration