Business Segments

The Company has three reportable segments: temporary and consultant staffing, permanent placement staffing, and risk consulting and internal audit services. The temporary and consultant staffing segment provides specialized staffing in the accounting and finance, administrative and office, information technology, legal, advertising, marketing and web design fields. The permanent placement staffing segment provides full-time personnel in the accounting, finance, administrative and office, and information technology fields. The risk consulting and internal audit services segment provides business and technology risk consulting and internal audit services.

The accounting policies of the segments are set forth in Note A—Summary of Significant Accounting Policies. The Company evaluates performance based on income from operations before net interest income, intangible amortization expense, and income taxes.

The following table provides a reconciliation of revenue and operating income by reportable segment to consolidated results (in thousands):



	Years Ended December 31,
	2018			2017			2016
Net service revenues
Temporary and consultant staffing	$	4,330,566		$	4,011,042		$	4,026,777
Permanent placement staffing	511,989			439,214			419,314
Risk consulting and internal audit services	957,716			816,533			804,308
	$	5,800,271		$	5,266,789		$	5,250,399
Operating income
Temporary and consultant staffing	$	404,800		$	355,700		$	393,704
Permanent placement staffing	90,801			77,673			80,001
Risk consulting and internal audit services	93,324			83,907			80,754
	588,925			517,280			554,459
Amortization of intangible assets	1,705			1,563			1,237
Interest income, net	(4,382		)	(1,799		)	(888		)
Income before income taxes	$	591,602		$	517,516		$	554,110

Assets by reportable segment are not presented as the Company does not allocate assets to its reportable segments, nor is such information used by management for purposes of assessing performance or allocating resources.

The Company operates internationally, with operations in North America, South America, Europe, Asia and Australia. The following tables represent revenues and long-lived assets by geographic location (in thousands):



	Years Ended December 31,
	2018		2017		2016
Net service revenues (a)
Domestic	$	4,433,767	$	4,121,701	$	4,220,477
Foreign (b)	1,366,504		1,145,088		1,029,922
	$	5,800,271	$	5,266,789	$	5,250,399

	December 31,
	2018		2017		2016
Assets, long-lived
Domestic	$	96,169	$	113,069	$	136,434
Foreign	29,007		31,818		25,075
	$	125,176	$	144,887	$	161,509

(a) There were no customers that accounted for more than 10% of the Company’s total net revenue in any year presented.

(b) No individual country represented more than 10% of revenues in any year presented.