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Business Segments | 12 Months Ended
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Dec. 31, 2017
Segment Reporting [Abstract] |
Business Segments | Business Segments The Company, which aggregates its operating segments based on the nature of services, 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 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,
|  | 2017 |  | 2016 |  | 2015
Net service revenues |  |  |  |  |  |
Temporary and consultant staffing |  | $ | 4,011,042 |  |  | $ | 4,026,777 |  |  | $ | 3,930,843 |
Permanent placement staffing |  | 439,214 |  |  | 419,314 |  |  | 421,411 |
Risk consulting and internal audit services |  | 816,533 |  |  | 804,308 |  |  | 742,679 |
|  | $ | 5,266,789 |  |  | $ | 5,250,399 |  |  | $ | 5,094,933 |
Operating income |  |  |  |  |  |
Temporary and consultant staffing |  | $ | 355,700 |  |  | $ | 393,704 |  |  | $ | 399,808 |
Permanent placement staffing |  | 77,673 |  |  | 80,001 |  |  | 85,019 |
Risk consulting and internal audit services |  | 83,907 |  |  | 80,754 |  |  | 95,845 |
|  | 517,280 |  |  | 554,459 |  |  | 580,672 |
Amortization of intangible assets |  | 1,563 |  |  | 1,237 |  |  | 192 |
Interest income, net |  | (1,799 | ) |  | (888 | ) |  | (550 | )
Income before income taxes |  | $ | 517,516 |  |  | $ | 554,110 |  |  | $ | 581,030 |
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,
|  | 2017 |  | 2016 |  | 2015
Net service revenues (a) |  |  |  |  |  |
Domestic |  | $ | 4,121,701 |  |  | $ | 4,220,477 |  |  | $ | 4,105,013 |
Foreign (b) |  | 1,145,088 |  |  | 1,029,922 |  |  | 989,920 |
|  | $ | 5,266,789 |  |  | $ | 5,250,399 |  |  | $ | 5,094,933 |
|  | December 31,
|  | 2017 |  | 2016 |  | 2015
Assets, long-lived |  |  |  |  |  |
Domestic |  | $ | 113,069 |  |  | $ | 136,434 |  |  | $ | 117,176 |
Foreign |  | 31,818 |  |  | 25,075 |  |  | 25,730 |
|  | $ | 144,887 |  |  | $ | 161,509 |  |  | $ | 142,906 |
(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.

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- Definition The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -URI http://asc.fasb.org/topic&trid=2134510 + Details
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