Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2022

Accounting Policies [Abstract]

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:

	Year Ended December 31,
(in thousands)	2022		2021		2020
Northeast	$	1,624,556	$	1,390,156	$	1,189,837
Southeast	796,219		630,342		509,846
Central	1,045,043		867,914		761,905
Southwest	1,163,088		993,747		935,634
West	1,251,186		1,033,996		839,347
	5,880,092		4,916,155		4,236,569
Other revenue	58,726		56,915		50,435
Total revenue	$	5,938,818	$	4,973,070	$	4,287,004

Property, Plant and Equipment [Table Text Block]

Property and equipment, net consisted of the following:

(in thousands)	December 31, 2022		December 31, 2021
Land	$	6,215	$	6,215
Buildings and improvements	207,740		206,449
Computer hardware and software	141,856		136,346
Software development costs	123,967		112,433
Furniture, fixtures and other	50,835		51,552
Property and equipment, gross	530,613		512,995
Accumulated depreciation and amortization	(330,621)		(302,272)
Property and equipment, net	$	199,992	$	210,723

Estimated Useful Lives of Property and Equipment

The estimated useful lives of property and equipment for purposes of computing depreciation are as follows:

	Useful Life
Buildings and improvements	5	—	30	years
Computer hardware and software	2	—	5	years
Software development costs	3	—	3	years
Furniture, fixtures and other	5	—	7	years

Activity and Balances Related to Incurred But Not Paid Worker's Compensation Claims

The following table provides the activity and balances related to incurred but not paid workers’ compensation claims:

	Year Ended December 31,
(in thousands)	2022		2021
Beginning balance	$	239,623	$	240,761
Accrued claims	49,121		48,097
Present value discount, net of accretion	(9,517)		(898)
Paid claims	(49,819)		(48,337)
Ending balance	$	229,408	$	239,623
Current portion of accrued claims	$	49,779	$	46,929
Long-term portion of accrued claims	179,629		192,694
Total accrued claims	$	229,408	$	239,623