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Accounting Policies (Tables) | 6 Months Ended
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Jun. 30, 2023
Accounting Policies [Abstract] |
Activity and balances related to incurred but not paid workers' compensation claims | The following table provides the activity and balances related to incurred but not paid workers’ compensation claims:
| Six Months Ended June 30,
(in thousands) | 2023 |  | 2022
Beginning balance, January 1, | $ | 229,408 |  |  | $ | 239,623 |
Accrued claims | 30,980 |  |  | 18,780 |
Present value discount, net of accretion | (6,465) |  |  | (3,501) |
Paid claims | (26,344) |  |  | (27,899) |
Ending balance | $ | 227,579 |  |  | $ | 227,003 |
Current portion of accrued claims | $ | 48,002 |  |  | $ | 53,317 |
Long-term portion of accrued claims | 179,577 |  |  | 173,686 |
Total accrued claims | $ | 227,579 |  |  | $ | 227,003 |
Disaggregation of Revenue [Table Text Block] | Our revenue for our PEO HR Outsourcing Solutions by geographic region and for our other products and services offerings are as follows:
| Three Months Ended June 30, |  | Six Months Ended June 30,
(in thousands) | 2023 | 2022 | % Change |  | 2023 | 2022 | % Change
Northeast | $ | 425,848 |  | $ | 388,680 |  | 9.6 | % |  | $ | 918,138 |  | $ | 838,602 |  | 9.5 | %
Southeast | 221,329 |  | 192,782 |  | 14.8 | % |  | 459,936 |  | 394,985 |  | 16.4 | %
Central | 284,920 |  | 252,039 |  | 13.0 | % |  | 603,712 |  | 523,350 |  | 15.4 | %
Southwest | 307,375 |  | 279,936 |  | 9.8 | % |  | 647,787 |  | 588,774 |  | 10.0 | %
West | 330,122 |  | 304,380 |  | 8.5 | % |  | 693,102 |  | 635,152 |  | 9.1 | %
| 1,569,594 |  | 1,417,817 |  | 10.7 | % |  | 3,322,675 |  | 2,980,863 |  | 11.5 | %
Other revenue | 15,535 |  | 14,290 |  | 8.7 | % |  | 32,106 |  | 29,081 |  | 10.4 | %
Total revenue | $ | 1,585,129 |  | $ | 1,432,107 |  | 10.7 | % |  | $ | 3,354,781 |  | $ | 3,009,944 |  | 11.5 | %

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- Definition Disclosure of the incurred but not yet paid workers' compensation claims activities and balances. + References No definition available. + Details
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- Definition Tabular disclosure of disaggregation of revenue into categories depicting how nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factor. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479806/606-10-50-5 + Details
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