SEGMENT INFORMATION

We operate in three reportable segments: North America, Europe and Asia-Pacific. We evaluate performance and allocate resources based on the operating income of each operating segment. The operating income of each operating segment includes the revenues of the segment less expenses that are directly related to those revenues. Operating overhead, shared costs and certain compensation costs are included in Corporate in the following table. Interest and other income, interest and other expense and provision for income taxes are not allocated to the individual segments. We do not evaluate the performance of or allocate resources to our operating segments using asset data. The accounting policies of the reportable operating segments are the same as those described in our Annual Report on Form 10-K for the year ended December 31, 2017 and our summary of significant accounting policies in "Note 1—Basis of Presentation and Summary of Significant Accounting Policies."

Information on segments and reconciliations to consolidated revenues and consolidated operating income was as follows for the three and nine months ended September 30, 2018 and 2017:



	Three Months Ended						Nine Months Ended
	September 30, 2018			September 30, 2017			September 30, 2018			September 30, 2017

	(in thousands)

Revenues^{(1) (2)}:
North America	$	643,715		$	764,902		$	1,859,545		$	2,162,911
Europe	157,584			205,203			456,492			557,258
Asia-Pacific	56,371			68,802			169,774			200,741
Consolidated revenues	$	857,670		$	1,038,907		$	2,485,811		$	2,920,910

Operating income (loss)⁽²⁾:
North America	$	174,012		$	138,345		$	446,600		$	344,604
Europe	85,781			76,214			239,011			196,394
Asia-Pacific	23,692			20,032			67,043			57,321
Corporate⁽³⁾	(60,323		)	(62,120		)	(182,585		)	(189,026		)
Consolidated operating income	$	223,162		$	172,471		$	570,069		$	409,293

Depreciation and amortization⁽²⁾:
North America	$	106,022		$	95,056		$	313,980		$	277,219
Europe	11,660			11,863			36,180			34,926
Asia-Pacific	4,381			4,484			13,740			12,068
Corporate	1,994			2,246			5,548			5,750
Consolidated depreciation and amortization	$	124,057		$	113,649		$	369,448		$	329,963

⁽¹⁾As more fully described in "Note 1—Basis of Presentation and Summary of Significant Accounting Policies" and "Note 3—Revenues," we adopted a new revenue accounting standard on January 1, 2018 that results in revenue being presented net of certain fees that we pay to third parties. This change in presentation affected our reported revenues and operating expenses during the three and nine months ended September 30, 2018 by the same amount and had no effect on operating income.

⁽²⁾ Revenues, operating income and depreciation and amortization reflect the effect of acquired businesses from the respective dates of acquisition. For further discussion, see "Note 2—Acquisitions."

⁽³⁾ During the three and nine months ended September 30, 2018, operating loss for Corporate included acquisition and integration expenses of $8.2 million and $34.6 million, respectively. During the three and nine months ended September 30, 2017, operating loss for Corporate included acquisition and integration expenses of $21.5 million and $69.5 million, respectively.