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 these three reportable segments. The Company defines adjusted EBITDA as income or loss from operations plus depreciation, amortization, accretion, stock-based compensation expense, restructuring charges, impairment charges, acquisition costs, and gain on asset sales as presented below for the years ended December 31 (in thousands):



	2017			2016			2015
Adjusted EBITDA:
Americas	$	1,034,694		$	787,311		$	698,604
EMEA	582,697			494,263			318,561
Asia-Pacific	434,650			375,900			254,462
Total adjusted EBITDA	2,052,041			1,657,474			1,271,627
Depreciation, amortization and accretion expense	(1,028,892		)	(843,510		)	(528,929		)
Stock-based compensation expense	(175,500		)	(156,148		)	(133,633		)
Acquisitions costs	(38,635		)	(64,195		)	(41,723		)
Impairment charges	—			(7,698		)	—
Gain on asset sales	—			32,816			—
Income from operations	$	809,014		$	618,739		$	567,342

The Company provides the following segment disclosures related to its continuing operations as follows for the years ended December 31 (in thousands):



	2017		2016		2015
Total revenues:
Americas⁽¹⁾	$	2,172,760	$	1,679,549	$	1,512,535
EMEA	1,346,256		1,171,339		698,807
Asia-Pacific	849,412		761,101		514,525
	$	4,368,428	$	3,611,989	$	2,725,867

Total depreciation and amortization:
Americas	$	515,726	$	319,202	$	278,216
EMEA	316,250		313,291		117,655
Asia-Pacific	210,504		204,714		129,709
	$	1,042,480	$	837,207	$	525,580

Capital expenditures:
Americas	$	621,158	$	503,855	$	401,685
EMEA	555,346		400,642		202,322
Asia-Pacific	202,221		208,868		264,113
	$	1,378,725	$	1,113,365	$	868,120

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(1)	Includes revenues of $2.0 billion, $1.5 billion and $1.4 billion, respectively, attributed to the U.S. for the years ended December 31, 2017, 2016 and 2015.

The Company’s long-lived assets are located in the following geographic areas as of December 31 (in thousands):



	2017		2016
Americas ⁽¹⁾	$	4,425,077	$	3,339,518
EMEA	3,265,088		2,355,943
Asia-Pacific	1,704,437		1,503,749
	$	9,394,602	$	7,199,210

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(1)	Includes $4.0 billion and $3.0 billion, respectively, of long-lived assets attributed to the U.S. as of December 31, 2017 and 2016.

The following table presents revenue information on a service basis for the year ended December 31, 2017, 2016 and 2015 (in thousands):



	2017		2016		2015
Colocation	$	3,178,145	$	2,647,094	$	2,019,875
Interconnection	681,173		543,045		441,749
Managed infrastructure	245,169		210,292		96,836
Rental	15,633		16,943		10,681
Recurring revenues	4,120,120		3,417,374		2,569,141
Non-recurring revenues	248,308		194,615		156,726
	$	4,368,428	$	3,611,989	$	2,725,867