Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2019

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)	2019		2018		2017
Northeast	$	1,135,771	$	996,541	$	854,629
Southeast	499,201		447,584		379,874
Central	743,514		637,779		543,486
Southwest	1,001,845		895,243		767,207
West	880,434		797,942		702,619
	4,260,765		3,775,089		3,247,815
Other revenue	54,039		53,460		52,408
Total revenue	$	4,314,804	$	3,828,549	$	3,300,223

Property, Plant and Equipment [Table Text Block]

Property and equipment, net consisted of the following:

(in thousands)	December 31, 2019			December 31, 2018
Land	$	6,215		$	6,215
Buildings and improvements	119,635			112,308
Computer hardware and software	123,232			115,259
Software development costs	85,252			71,332
Furniture, fixtures and other	48,082			45,694
Construction in progress	20,885			—
	403,301			350,808
Accumulated depreciation and amortization	(255,595		)	(233,595		)
Total property and equipment, net	$	147,706		$	117,213

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)	2019			2018
Beginning balance	$	229,639		$	207,630
Accrued claims	63,538			72,066
Present value discount	(4,629		)	(7,829		)
Paid claims	(45,644		)	(42,228		)
Ending balance	$	242,904		$	229,639
Current portion of accrued claims	$	49,295		$	42,227
Long-term portion of accrued claims	193,609			187,412
Total accrued claims	$	242,904		$	229,639