XML 42 R31.htm IDEA: XBRL DOCUMENT
v3.21.1

Employee Deferred Compensation Plan Obligations (Tables) | 3 Months Ended
--- | ---
Mar. 31, 2021
Deferred Compensation Plans [Abstract] |
Contribution Plans and Nonqualified Plans | The following table presents the Company’s compensation expense related to its qualified defined contribution plans and nonqualified plans (in thousands):
|  | Three Months Ended March 31,
|  | 2021 |  |  | 2020
Contribution expense |  | $ | 9,554 |  |  |  | $ | 8,485 |
Increase (decrease) in employee deferred compensation expense related to changes in the fair value of trust assets |  | 11,988 |  |  |  | (40,376) |
|  | $ | 21,542 |  |  |  | $ | (31,891) |

X
- Definition contribution plans and nonqualified plans [Table Text Block] + References No definition available. + Details
Name: | rhi_ContributionPlansAndNonqualifiedPlansTableTextBlock
Namespace Prefix: | rhi_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Deferred Compensation Plans + References No definition available. + Details
Name: | rhi_DeferredCompensationPlansAbstract
Namespace Prefix: | rhi_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration