Segment Information

While the Company has a single line of business, which is the design, build-out and operation of IBX data centers, it has determined that it has three reportable segments comprised of its Americas, EMEA and Asia-Pacific geographic regions. The Company's chief operating decision-maker evaluates performance, makes operating decisions and allocates resources based on the Company's revenues and adjusted EBITDA performance both on a consolidated basis and based on these three reportable segments. The Company defines adjusted EBITDA as income from operations plus depreciation, amortization, accretion, stock-based compensation expense, restructuring charges, impairment charges, acquisition costs and gains on asset sales as presented below (in thousands):



	Three Months Ended June 30,						Six Months Ended June 30,
	2018			2017			2018			2017
Adjusted EBITDA:
Americas	$	293,955		$	258,151		$	585,504		$	456,770
EMEA	170,815			141,622			336,993			271,176
Asia-Pacific	139,234			109,535			261,022			208,936
Total adjusted EBITDA	604,004			509,308			1,183,519			936,882
Depreciation, amortization and accretion expense	(308,828		)	(252,386		)	(615,293		)	(471,399		)
Stock-based compensation expense	(49,725		)	(45,625		)	(92,261		)	(83,948		)
Acquisition costs	(30,413		)	(26,402		)	(35,052		)	(29,427		)
Income from operations	$	215,038		$	184,895		$	440,913		$	352,108

The Company also provides the following additional segment disclosures (in thousands):



	Three Months Ended June 30,				Six Months Ended June 30,
	2018		2017		2018		2017
Revenues:
Americas	$	618,275	$	533,608	$	1,220,902	$	970,055
EMEA	383,168		322,944		762,798		637,791
Asia-Pacific	260,500		209,869		494,120		408,100
Total	$	1,261,943	$	1,066,421	$	2,477,820	$	2,015,946
Depreciation and amortization:
Americas	$	159,922	$	124,342	$	317,500	$	212,269
EMEA	88,492		78,962		181,772		155,130
Asia-Pacific	58,917		51,482		115,627		104,393
Total	$	307,331	$	254,786	$	614,899	$	471,792
Capital expenditures:
Americas	$	200,277	$	160,679	$	347,606	$	314,114
EMEA	222,377		151,485		376,768		235,069
Asia-Pacific	97,585		36,408		145,594		76,631
Total	$	520,239	$	348,572	$	869,968	$	625,814

The Company's long-lived assets are located in the following geographic areas as of (in thousands):



	June 30, 2018		December 31, 2017
Americas	$	4,882,241	$	4,425,077
EMEA	3,447,595		3,265,088
Asia-Pacific	2,049,079		1,704,437
Total long-lived assets	$	10,378,915	$	9,394,602

The following tables present revenue information disaggregated by service lines and geographic areas (in thousands):



	Three Months Ended June 30, 2018								Six Months Ended June 30, 2018
	Americas		EMEA		Asia-Pacific		Total		Americas		EMEA		Asia-Pacific		Total
Colocation ⁽¹⁾	$	433,895	$	293,518	$	186,172	$	913,585	$	861,020	$	581,579	$	352,370	$	1,794,969
Interconnection	131,720		33,969		31,924		197,613		260,973		68,946		62,693		392,612
Managed infrastructure	18,292		29,731		21,184		69,207		36,827		60,417		43,364		140,608
Other ⁽¹⁾	4,980		2,364		—		7,344		6,059		4,130		—		10,189
Recurring revenues	588,887		359,582		239,280		1,187,749		1,164,879		715,072		458,427		2,338,378
Non-recurring revenues	29,388		23,586		21,220		74,194		56,023		47,726		35,693		139,442
Total	$	618,275	$	383,168	$	260,500	$	1,261,943	$	1,220,902	$	762,798	$	494,120	$	2,477,820

⁽¹⁾Includes some leasing and hedging activities that are insignificant to the Company's total operations.



	Three Months Ended June 30, 2017								Six Months Ended June 30, 2017
	Americas		EMEA		Asia-Pacific		Total		Americas		EMEA		Asia-Pacific		Total
Colocation ⁽¹⁾	$	374,764	$	259,684	$	147,783	$	782,231	$	674,037	$	512,938	$	286,778	$	1,473,753
Interconnection	116,248		23,655		25,781		165,684		217,098		46,006		50,640		313,744
Managed infrastructure	17,005		19,205		21,983		58,193		32,066		36,877		43,859		112,802
Other ⁽¹⁾	1,903		2,037		—		3,940		2,822		5,367		—		8,189
Recurring revenues	509,920		304,581		195,547		1,010,048		926,023		601,188		381,277		1,908,488
Non-recurring revenues	23,688		18,363		14,322		56,373		44,032		36,603		26,823		107,458
Total	$	533,608	$	322,944	$	209,869	$	1,066,421	$	970,055	$	637,791	$	408,100	$	2,015,946

⁽¹⁾Includes some leasing and hedging activities that are insignificant to the Company's total operations.

No single customer accounted for 10% or greater of the Company's accounts receivable or revenues for the three and six months ended June 30, 2018 and 2017.