Equinix (EQIX) 10-K 26 Feb 18 2017 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($) $ in Billions	12 Months Ended
	Dec. 31, 2017	Feb. 23, 2018	Jun. 30, 2017
Document And Entity Information [Abstract]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 31, 2017
Document Fiscal Year Focus	2,017
Document Fiscal Period Focus	FY
Trading Symbol	EQIX
Entity Registrant Name	EQUINIX INC
Entity Central Index Key	1,101,239
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	Yes
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		79,228,072
Entity Public Float			$ 33.5

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 1,412,517	$ 748,476
Short-term investments	28,271	3,409
Accounts receivable, net of allowance for doubtful accounts of $18,228 and $15,675	576,313	396,245
Other current assets	232,027	319,396
Total current assets	2,249,128	1,467,526
Long-term investments	9,243	10,042
Property, plant and equipment, net	9,394,602	7,199,210
Goodwill	4,411,762	2,986,064
Intangible assets, net	2,384,972	719,231
Other assets	241,750	226,298
Total assets	18,691,457	12,608,371
Current liabilities:
Accounts payable and accrued expenses	719,257	581,739
Accrued property, plant and equipment	220,367	144,842
Current portion of capital lease and other financing obligations	78,705	101,046
Current portion of mortgage and loans payable	64,491	67,928
Other current liabilities	159,914	133,140
Total current liabilities	1,242,734	1,028,695
Capital lease and other financing obligations, less current portion	1,620,256	1,410,742
Mortgage and loans payable, less current portion	1,393,118	1,369,087
Senior notes	6,923,849	3,810,770
Other liabilities	661,710	623,248
Total liabilities	11,841,667	8,242,542
Commitments and contingencies (Note 14)
Stockholders' equity:
Preferred stock, $0.001 par value per share: 100,000,000 shares authorized in 2017 and 2016; zero shares issued and outstanding	0	0
Common stock, $0.001 par value per share: 300,000,000 shares authorized in 2017 and 2016; 79,440,404 issued and 79,038,062 outstanding in 2017 and 71,817,430 issued and 71,409,015 outstanding in 2016	79	72
Additional paid-in capital	10,121,323	7,413,519
Treasury stock, at cost; 402,342 shares in 2017 and 408,415 shares in 2016	(146,320)	(147,559)
Accumulated dividends	(2,592,792)	(1,969,645)
Accumulated other comprehensive loss	(785,189)	(949,142)
Retained earnings	252,689	18,584
Total stockholders' equity	6,849,790	4,365,829
Total liabilities and stockholders' equity	$ 18,691,457	$ 12,608,371

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Statement of Financial Position [Abstract]
Allowance for doubtful accounts	$ 18,228	$ 15,675
Preferred Stock, Par value per share (in dollars per share)	$ 0.001	$ 0.001
Preferred Stock, Shares authorized	100,000,000	100,000,000
Preferred Stock, Shares issued	0	0
Preferred Stock, Shares outstanding	0	0
Common Stock, Par value per share (in dollars per share)	$ 0.001	$ 0.001
Common Stock, Shares authorized	300,000,000	300,000,000
Common Stock, Shares issued	79,440,404	71,817,430
Common Stock, Shares outstanding	79,038,062	71,409,015
Treasury stock, at cost (shares)	402,342	408,415

Consolidated Statements of Oper

Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Statement [Abstract]
Revenues	$ 4,368,428	$ 3,611,989	$ 2,725,867
Costs and operating expenses:
Cost of revenues	2,193,149	1,820,870	1,291,506
Sales and marketing	581,724	438,742	332,012
General and administrative	745,906	694,561	493,284
Acquisition costs	38,635	64,195	41,723
Impairment charges	0	7,698	0
Gain on asset sales	0	(32,816)	0
Total costs and operating expenses	3,559,414	2,993,250	2,158,525
Income from operations	809,014	618,739	567,342
Interest income	13,075	3,476	3,581
Interest expense	(478,698)	(392,156)	(299,055)
Other income (expense)	9,213	(57,924)	(60,581)
Loss on debt extinguishment	(65,772)	(12,276)	(289)
Income from continuing operations before income taxes	286,832	159,859	210,998
Income tax expense	(53,850)	(45,451)	(23,224)
Net income from continuing operations	232,982	114,408	187,774
Net income from discontinued operations, net of tax	0	12,392	0
Net income	$ 232,982	$ 126,800	$ 187,774
Earnings per share (EPS):
Basic EPS from continuing operations (in dollars per share)	$ 3.03	$ 1.63	$ 3.25
Basic EPS of discontinued operations (in dollars per share)	0	0.18	0
Basic EPS (in dollars per share)	$ 3.03	$ 1.81	$ 3.25
Weighted-average shares	76,854	70,117	57,790
Dilutive EPS from continuing operations (in dollars per share)	$ 3	$ 1.62	$ 3.21
Dilutive EPS from discontinued operations (in dollars per share)	0	0.17	0
Diluted EPS (in dollars per share)	$ 3	$ 1.79	$ 3.21
Weighted-average shares	77,535	70,816	58,483
Dividends declared per share (in dollars per share)	$ 8	$ 7	$ 17.71

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Statement of Comprehensive Income [Abstract]
Net income	$ 232,982	$ 126,800	$ 187,774
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustment (CTA) gain (loss)	454,269	(507,420)	(186,763)
Net investment hedge CTA gain (loss)	(235,292)	45,505	4,484
Unrealized gain (loss) on available-for-sale securities, net of tax effects of $(10), $(784) and $(4)	14	2,249	(40)
Unrealized gain (loss) on cash flow hedges, net of tax effects of $18,542, $(6,760) and $(1,840)	(54,895)	19,551	4,550
Net actuarial gain (loss) on defined benefit plans, net of tax effects of $39, $(8) and $(214)	(143)	32	1,153
Total other comprehensive income (loss), net of tax	163,953	(440,083)	(176,616)
Comprehensive income (loss), net of tax	$ 396,935	$ (313,283)	$ 11,158

Consolidated Statements of Com6

Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Statement of Comprehensive Income [Abstract]
Unrealized gain (loss) on available-for-sale securities	$ (10)	$ (784)	$ (4)
Unrealized gain (loss) on cash flow hedges	18,542	(6,760)	(1,840)
Defined benefit plans	$ 39	$ (8)	$ (214)

Consolidated Statements of Stoc

Consolidated Statements of Stockholders Equity and Other Comprehensive Income (Loss) - USD ($) $ in Thousands	Total	Common stock	Treasury stock	Additional Paid-in Capital	Accumulated Dividends	Accumulated Other Comprehensive Income (Loss)	Retained Earnings (Accumulated Deficit)	Public offering	Public offeringCommon stock	Public offeringAdditional Paid-in Capital	At The Market (ATM)	At The Market (ATM)Common stock	At The Market (ATM)Additional Paid-in Capital
Beginning balance at Dec. 31, 2014	$ 2,270,131	$ 57	$ (11,411)	$ 3,334,305	$ (424,387)	$ (332,443)	$ (295,990)
Beginning Balance, shares at Dec. 31, 2014		56,505,122	(53,867)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	187,774						187,774
Total other comprehensive income (loss), net of tax	(176,616)					(176,616)
Issuance of common stock in public offering of common stock, net								$ 829,496	$ 3	$ 829,493
Issuance of common stock in public offering of common stock, shares									2,994,792
Issuance of common stock and release of treasury stock for employee equity awards	30,040	$ 1	$ 1,546	28,493
Issuance of common stock and release of treasury stock for employee equity awards, shares		856,406	7,348
Issuance of common stock and release of treasury stock for the exchanges and conversions of 4.75% convertible debt	7,884		$ 2,492	5,392
Issuance of common stock and release of treasury stock for the exchanges and conversions of 4.75% convertible debt (in shares)		90,163	11,784
Issuance of common stock and cash payment for special distribution	(125,707)	$ (1)		(501,513)	627,221
Issuance of common stock for special distribution, shares		1,688,411
Dividend distributions	(393,584)				(393,584)
Settlement of accrued dividends on vested equity awards	3,775			3,775
Accrued dividends on unvested equity awards	(23,280)				(23,280)
Tax benefit from employee stock plans	30			30
Stock-based compensation, net of estimated forfeitures	135,443			135,443
Ending balance at Dec. 31, 2015	2,745,386	$ 62	$ (7,373)	4,838,444	(1,468,472)	(509,059)	(108,216)
Ending Balance, shares at Dec. 31, 2015		62,134,894	(34,735)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	126,800						126,800
Total other comprehensive income (loss), net of tax	(440,083)					(440,083)
Issuance of common stock and release of treasury stock for employee equity awards	34,675	$ 1	$ 1,502	33,172
Issuance of common stock and release of treasury stock for employee equity awards, shares		847,374	7,099
Issuance of common stock for TelecityGroup acquisition	2,077,912	$ 7		2,077,905
Issuance of common stock for TelecityGroup acquisition (in shares)		6,853,500
Issuance of common stock and release of treasury stock for the exchanges and conversions of 4.75% convertible debt	150,025	$ 2	$ (141,688)	291,711
Issuance of common stock and release of treasury stock for the exchanges and conversions of 4.75% convertible debt (in shares)		1,981,662	(380,779)
Dividend distributions	(492,403)				(492,403)
Settlement of accrued dividends on vested equity awards	7,270			8,270	(1,000)
Accrued dividends on unvested equity awards	(7,770)				(7,770)
Tax benefit from employee stock plans	2,773			2,773
Stock-based compensation, net of estimated forfeitures	161,244			161,244
Ending balance at Dec. 31, 2016	$ 4,365,829	$ 72	$ (147,559)	7,413,519	(1,969,645)	(949,142)	18,584
Ending Balance, shares at Dec. 31, 2016	71,409,015	71,817,430	(408,415)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Adjustment from adoption of new accounting standard	$ 1,123						1,123
Net income	232,982						232,982
Total other comprehensive income (loss), net of tax	163,953					163,953
Issuance of common stock in public offering of common stock, net								$ 2,126,339	$ 6	$ 2,126,333	$ 355,082		$ 355,082
Issuance of common stock in public offering of common stock, shares									6,069,444		763,201	763,201
Issuance of common stock and release of treasury stock for employee equity awards	41,689	$ 1	$ 1,239	40,449
Issuance of common stock and release of treasury stock for employee equity awards, shares		790,329	6,073
Dividend distributions	(612,085)				(612,085)
Settlement of accrued dividends on vested equity awards	3,390			4,280	(890)
Accrued dividends on unvested equity awards	(10,172)				(10,172)
Stock-based compensation, net of estimated forfeitures	181,660			181,660
Ending balance at Dec. 31, 2017	$ 6,849,790	$ 79	$ (146,320)	$ 10,121,323	$ (2,592,792)	$ (785,189)	$ 252,689
Ending Balance, shares at Dec. 31, 2017	79,038,062	79,440,404	(402,342)

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Cash flows from operating activities:
Net income	$ 232,982	$ 126,800	$ 187,774
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	865,472	714,345	498,134
Stock-based compensation	175,500	155,567	132,443
Amortization of intangible assets	177,008	122,862	27,446
Amortization of debt issuance costs and debt discounts	24,449	19,137	16,050
Provision for allowance for doubtful accounts	5,627	8,260	5,037
Impairment charges	0	7,698	0
Gain on asset sales	0	(32,816)	0
Gain on sale of discontinued operations	0	(2,351)	0
Loss on debt extinguishment	65,772	12,276	289
Other items	(11,243)	20,609	16,490
Changes in operating assets and liabilities:
Accounts receivable	(161,774)	(100,230)	(44,583)
Income taxes, net	(34,936)	29,020	(109,579)
Other assets	20,180	(72,831)	(70,371)
Accounts payable and accrued expenses	74,488	61,565	109,125
Other liabilities	5,708	(50,558)	126,568
Net cash provided by operating activities	1,439,233	1,019,353	894,823
Cash flows from investing activities:
Purchases of investments	(57,926)	(42,325)	(359,031)
Sales and maturities of investments	46,421	53,164	873,139
Business acquisitions, net of cash and restricted cash acquired	(3,963,280)	(1,766,606)	(245,503)
Purchases of real estate	(95,083)	(28,118)	(38,282)
Purchases of other property, plant and equipment	(1,378,725)	(1,113,365)	(868,120)
Proceeds from sale of assets, net of cash transferred	47,767	851,582	0
Net cash used in investing activities	(5,400,826)	(2,045,668)	(637,797)
Cash flows from financing activities:
Proceeds from employee equity awards	41,696	34,179	30,040
Payment of dividends and special distribution	(621,497)	(499,463)	(521,461)
Proceeds from public offering of common stock, net of issuance costs	2,481,421	0	829,496
Proceeds from senior notes	3,628,701	0	1,100,000
Proceeds from loans payable	2,056,876	1,168,304	1,197,108
Repayment of senior notes	(500,000)	0	0
Repayment of capital lease and other financing obligations	(93,470)	(114,385)	(28,663)
Repayment of mortgage and loans payable	(2,277,798)	(1,462,888)	(715,270)
Debt extinguishment costs	(26,122)	(11,380)	0
Debt issuance costs	(81,047)	(11,381)	(18,098)
Other financing activities	(900)	(51)	0
Net cash provided by (used in) financing activities	4,607,860	(897,065)	1,873,152
Effect of foreign currency exchange rates on cash, cash equivalents and restricted cash	31,187	(21,800)	(39,784)
Net increase (decrease) in cash, cash equivalents and restricted cash	677,454	(1,945,180)	2,090,394
Cash, cash equivalents and restricted cash at beginning of period	773,247	2,718,427	628,033
Cash, cash equivalents and restricted cash at end of period	1,450,701	773,247	2,718,427
Supplemental cash flow information
Cash paid for taxes	72,641	39,320	132,302
Cash paid for interest	444,793	350,083	237,410
Cash and cash equivalents	1,412,517	748,476	2,228,838
Current portion of restricted cash included in other current assets	26,919	15,065	479,417
Non-current portion of restricted cash included in other assets	$ 11,265	$ 9,706	$ 10,172

Nature of Business and Summary

Nature of Business and Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2017
Accounting Policies [Abstract]
Nature of Business and Summary of Significant Accounting Policies	Nature of Business and Summary of Significant Accounting Policies Nature of Business Equinix, Inc. ("Equinix" or the "Company") was incorporated in Delaware on June 22, 1998. Equinix provides colocation space and related services. Global enterprises, content providers, financial companies and network service providers rely upon Equinix’s insight and expertise to safehouse and connect their most valued information assets. The Company operates International Business Exchange TM ("IBX ® ") data centers, or IBX data centers, across the Americas; Europe, Middle East and Africa ("EMEA") and Asia-Pacific geographic regions where customers directly interconnect with a network ecosystem of partners and customers. More than 1,700 network service providers offer access to the world’s internet routes inside the Company’s IBX data centers. This access to internet routes provides Equinix customers improved reliability and streamlined connectivity while significantly reducing costs by reaching a critical mass of networks within a centralized physical location. The Company has been operating as a Real Estate Investment Trust for federal income tax purposes ("REIT") effective January 1, 2015. See "Income Taxes" in Note 13 below for additional information. On January 14, 2015, the Company acquired all of the issued and outstanding share capital of Nimbo Technologies Inc. ("Nimbo"). On November 2, 2015, the Company acquired Bit-isle, Inc. ("Bit-isle"), a Tokyo-based company which primarily provided data center solutions in Japan. On January 15, 2016, the Company completed its acquisition of Telecity Group plc ("TelecityGroup") which provided data center solutions in Europe. On August 1, 2016, the Company completed the purchase of Digital Realty's operating business in Paris (the "Paris IBX Data Center Acquisition"), which housed Equinix' Paris 2 and Paris 3 data centers. On February 3, 2017, the Company acquired IO UK's data center operating business in Slough, United Kingdom ("IO Acquisition"). On May 1, 2017, the Company completed the acquisition of certain colocation business from Verizon Communications Inc. ("Verizon") consisting of 29 data center buildings located in the United States, Brazil and Colombia (the "Verizon Data Center Acquisition"). On October 6, 2017, the Company completed the acquisition of Zenium's data center business in Istanbul and on October 9, 2017, the Company completed the acquisition of Itconic, a data center business in Spain and Portugal. As a result of these acquisitions, the Company operates 190 IBX data centers in 48 markets across five continents. Basis of Presentation, Consolidation and Foreign Currency The accompanying consolidated financial statements include the accounts of Equinix and its subsidiaries, including the acquisitions of Itconic from October 9, 2017, the Zenium data center from October 6, 2017, the Verizon data center business from May 1, 2017, the IO UK data center operating business from February 3, 2017, the Paris IBX Data Center from August 1, 2016, TelecityGroup from January 15, 2016, Bit-isle from November 2, 2015 and Nimbo from January 14, 2015. All intercompany accounts and transactions have been eliminated in consolidation. Foreign exchange gains or losses resulting from foreign currency transactions, including intercompany foreign currency transactions, that are anticipated to be repaid within the foreseeable future, are reported within other income (expense) on the Company’s accompanying consolidated statements of operations. For additional information on the impact of foreign currencies to the Company’s consolidated financial statements, see "Accumulated Other Comprehensive Loss" in Note 11. Use of Estimates The preparation of consolidated financial statements in conformity with accounting principles generally accepted in the United States ("U.S.") requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from these estimates. On an ongoing basis, the Company evaluates its estimates, including, but not limited to, those related to the allowance for doubtful accounts, fair values of financial instruments, intangible assets and goodwill, useful lives of intangible assets and property, plant and equipment, assets acquired and liabilities assumed from acquisitions, asset retirement obligations and income taxes. The Company bases its estimates on historical experience and on various other assumptions that are believed to be reasonable. Cash, Cash Equivalents and Short-Term and Long-Term Investments The Company considers all highly liquid instruments with an original maturity from the date of purchase of three months or less to be cash equivalents. Cash equivalents consist of money market mutual funds and certificates of deposit with original maturities up to 90 days. Short-term investments generally consist of certificates of deposit with original maturities of between 90 days and one year. Long-term investments consist of certificates of deposit with original maturities of one year or more and publicly traded equity securities. The Company’s investments in publicly traded equity securities are classified as "available-for-sale" and are carried at fair value with unrealized gains and losses reported in stockholders’ equity as a component of other comprehensive income (loss). The cost of securities sold is based on the specific identification method. The Company reviews its investment portfolio quarterly to determine if any securities may be other-than-temporarily impaired due to increased credit risk, changes in industry or sector of a certain instrument or ratings downgrades. Equity Method and Cost Method Investments The Company's investments in non-marketable equity securities are accounted under the cost method or the equity method. For cost method investments, the Company records the dividends declared by the investees in other income and expense in the consolidated statement of operations and records any dividends in excess of earnings as a reduction of cost of investment. For equity method investments, the Company adjusts the carrying amount of an investment for its share of the earnings and losses of the investees and recognizes its share of income or loss in other income and expense in the consolidated statement of operations. The Company records cost method and equity method investments in other assets in the consolidated balance sheet. The Company reviews these investments periodically to determine if any investments may be other-than-temporarily impaired primarily based on the financial condition and near-term prospects of these companies and funds. Financial Instruments and Concentration of Credit Risk Financial instruments which potentially subject the Company to concentrations of credit risk consist of cash and cash equivalents, short-term investments, long-term investments and accounts receivable. Risks associated with cash and cash equivalents, short-term investments and long-term investments are mitigated by the Company’s investment policy, which limits the Company’s investing to only those marketable securities rated at least A-1/P-1 Short Term Rating and A-/A3 Long Term Rating, as determined by independent credit rating agencies. A significant portion of the Company’s customer base is comprised of businesses throughout the Americas. However, a portion of the Company’s revenues are derived from the Company’s EMEA and Asia-Pacific operations. The following table sets forth percentages of the Company’s revenues by geographic region for the years ended December 31: 2017 2016 2015 Americas 50 % 47 % 55 % EMEA 31 % 32 % 26 % Asia-Pacific 19 % 21 % 19 % No single customer accounted for greater than 10% of accounts receivable or revenues as of or for the years ended December 31, 2017 , 2016 and 2015 . Property, Plant and Equipment Property, plant and equipment are stated at the Company’s original cost or at fair value for property, plant and equipment acquired through acquisitions, net of depreciation. Depreciation is computed using the straight-line method over the estimated useful lives of the respective assets. Leasehold improvements and integral equipment at leased locations are amortized over the shorter of the lease term or the estimated useful life of the asset or improvement. Leasehold improvements acquired through acquisition are amortized over the shorter of the useful life of the assets or terms that include required lease periods and renewals that are deemed to be reasonably assured at the date of acquisition. Leasehold improvements that are placed into service significantly after and not contemplated at or near the beginning of the lease term are amortized over the shorter of the useful life of the assets or a term that includes required lease periods and renewals that are deemed to be reasonably assured at the date the leasehold improvements are purchased. The Company’s estimated useful lives of its property, plant and equipment are as follows: Core systems 3-25 years Buildings 12-50 years Leasehold improvements 12-40 years Personal Property 3-10 years The Company’s construction in progress includes direct and indirect expenditures for the construction and expansion of IBX data centers and is stated at original cost. The Company has contracted out substantially all of the construction and expansion efforts of its IBX data centers to independent contractors under construction contracts. Construction in progress includes costs incurred under construction contracts including project management services, engineering and schematic design services, design development, construction services and other construction-related fees and services. In addition, the Company has capitalized interest costs during the construction phase. Once an IBX data center or expansion project becomes operational, these capitalized costs are allocated to certain property, plant and equipment categories and are depreciated over the estimated useful life of the underlying assets. The Company reviews its property, plant and equipment for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable such as a significant decrease in market price of an asset, a significant adverse change in the extent or manner in which an asset is being used or in its physical condition, a significant adverse change in legal factors or business climate that could affect the value of an asset or a continuous deterioration of the Company’s financial condition. Recoverability of assets to be held and used is assessed by comparing the carrying amount of an asset to estimated undiscounted future net cash flows expected to be generated by the asset. If the carrying amount of the asset exceeds its estimated discounted future cash flows, an impairment charge is recognized by the amount by which the carrying amount of the asset exceeds the fair value of the asset. The Company did not record any impairment charges related to its property, plant and equipment during the years ended December 31, 2017 and 2015 . However, the Company recorded an impairment charge of $7.7 million relating to assets held for sale for the year ended December 31, 2016 as described below. Assets Held for Sale and Discontinued Operations Assets and liabilities to be disposed of that meet all of the criteria to be classified as held for sale as set forth in the accounting standard for impairment or disposal of long-lived assets are reported at the lower of their carrying amounts or fair values less costs to sell. Assets are not depreciated or amortized while they are classified as held for sale. A component of a reporting entity or a group of components of a reporting entity that are disposed or meet the criteria to be classified as held for sale should be reported in discontinued operations if the disposal represents a strategic shift that has (or will have) a major effect on an entity's operations and financial results. The accounting guidance requires a business activity that, on acquisition, meets the criteria to be classified as held for sale be reported as a discontinued operation. For further information on the Company's assets held for sale and discontinued operations, see Notes 4 and 5. Asset Retirement Costs The fair value of a liability for an asset retirement obligation is recognized in the period in which it is incurred. The associated retirement costs are capitalized and included as part of the carrying value of the long-lived asset and amortized over the useful life of the asset. Subsequent to the initial measurement, the Company accretes the liability in relation to the asset retirement obligations over time and the accretion expense is recorded as a cost of revenue. The Company’s asset retirement obligations are primarily related to its IBX data centers, of which the majority are leased under long-term arrangements, and, in certain cases, are required to be returned to the landlords in their original condition. The majority of the Company’s IBX data center leases have been subject to significant development by the Company in order to convert them from, in most cases, vacant buildings or warehouses into IBX data centers. The majority of the Company’s IBX data centers’ initial lease terms expire at various dates ranging from 2018 to 2065 and most of them enable the Company to extend the lease terms. Goodwill and Other Intangible Assets The Company has three reportable segments comprised of the 1) Americas, 2) EMEA and 3) Asia-Pacific geographic regions, which the Company also determined are its reporting units. Goodwill will not be amortized and will be tested for impairment at lease annually. As of December 31, 2017 , the Company had goodwill attributable to its Americas, EMEA and Asia-Pacific reporting units. The Company has the option to assess qualitative factors to determine whether it is more likely than not that the fair value of a reporting unit is less than its carrying value. If, after assessing the qualitative factors, the Company determines that it is not more likely than not that the fair value of a reporting unit is less than its carrying value, then performing the two-step impairment test is unnecessary. However, if the Company concludes otherwise, then it is required to perform the first step of the two-step goodwill impairment test. The first step, identifying a potential impairment, compares the fair value of a reporting unit with its carrying amount, including goodwill. If the carrying value of the reporting unit exceeds its fair value, the second step would need to be conducted; otherwise, no further steps are necessary as no potential impairment exists. The second step, measuring the impairment loss, compares the implied fair value of the reporting unit goodwill with the carrying amount of that goodwill. Any excess of the reporting unit goodwill carrying value over the respective implied fair value is recognized as an impairment loss. The Company assessed qualitative and quantitative factors during the fourth quarter of 2017 to determine whether it was more likely than not that the fair value of its Americas reporting unit, EMEA reporting unit and Asia-Pacific reporting unit was less than its carrying value. Qualitative factors considered in the assessment include industry and market conditions, overall financial performance, and other relevant events and factors affecting the reporting unit. Additionally, as part of this analysis, the Company may perform a quantitative analysis to support the qualitative factors by evaluating sensitivities to assumptions and inputs used in measuring a reporting unit's fair value. In 2016, the Company elected to bypass the qualitative assessment and performed the first step of the two-step goodwill impairment test for its Americas, EMEA and Asia-Pacific reporting units during the fourth quarter of 2016. In order to determine the fair value of each reporting unit, the Company utilizes the discounted cash flow and market methods. The assumptions supporting the discounted cash flow method was determined using the Company’s best estimates as of the date of the impairment review. As of December 31, 2017 and December 31, 2016, the Company concluded that it was more likely than not that goodwill attributed to the Company’s Americas, EMEA and Asia-Pacific reporting units was not impaired as the fair value of each reporting unit exceeded the carrying value of its respective reporting unit, including goodwill. Impairment assessments inherently involve judgment as to assumptions about expected future cash flows and the impact of market conditions on those assumptions. Future events and changing market conditions may impact the Company’s assumptions as to prices, costs, growth rates or other factors that may result in changes in the Company’s estimates of future cash flows. Although the Company believes the assumptions it used in its evaluation of impairment are reasonable, significant changes in any one of the Company’s assumptions could produce a significantly different result. Indicators of potential impairment that might lead the Company to perform interim goodwill impairment assessments include significant and unforeseen customer losses, a significant adverse change in legal factors or in the business climate, a significant adverse action or assessment by a regulator, a significant stock price decline or unanticipated competition. All of our intangible assets are subject to amortization and are amortized using the straight-line method over their estimated period of benefit. We perform a review of other intangible assets for impairment by assessing events or changes in circumstances that indicate the carrying amount of an asset may not be recoverable. Recoverability of assets to be held and used is assessed by comparing the carrying amount of an asset to estimated undiscounted future net cash flows expected to be generated by the asset. If the carrying amount of the asset exceeds its estimated discounted future cash flows, an impairment charge is recognized by the amount by which the carrying amount of the asset exceeds the fair value of the asset. The Company did not record any impairment charges related to its other intangible assets during the years ended December 31, 2017 , 2016 and 2015 . For further information on goodwill and other intangible assets, see Note 2 and Note 6 below. Debt Issuance Costs Loan fees and costs are capitalized and are amortized over the life of the related loans based on the effective interest method. Such amortization is included as a component of interest expense. Debt issuance costs related to outstanding debt are presented as a reduction of the carrying amount of the debt liability and debt issuance costs related to the revolving credit facility are presented as other assets. For the year ended December 31, 2016, debt issuance costs related to the unsecured bridge facility and undrawn term B-2 Loan are presented as other current assets. Derivatives and Hedging Activities The Company recognizes all derivatives on the Company's consolidated balance sheets at fair value. The accounting for changes in the value of a derivative depends on whether or not the contract has been designated and qualifies for hedge accounting. In order to qualify for hedge accounting, a derivative must be considered highly effective at reducing the risk associated with the exposure being hedged. In order for a derivative to be designated as a hedge, there must be documentation of the risk management objective and strategy, including identification of the hedging instrument, the hedged item and the risk exposure, and how effectiveness is to be assessed prospectively and retrospectively. To assess effectiveness of derivatives that qualify for hedge accounting, the Company uses a regression analysis. The extent to which a hedging instrument has been and is expected to continue to be effective at achieving offsetting changes in cash flows is assessed and documented at least quarterly. For qualifying cash flow hedges, the effective portion of the change in the fair value of the derivative is recorded in other comprehensive income (loss) and recognized in the consolidated statements of operations when the hedged cash flows affect earnings in the same statement of operations line item as the hedged item. The ineffective portion of cash flow hedges is immediately recognized in earnings. If it is determined that a derivative is not highly effective at hedging the designated exposure, hedge accounting is discontinued. If the hedge relationship is terminated, then the change in fair value of the derivative recorded in other comprehensive income (loss) is recognized in earnings when the cash flows that were hedged occur, consistent with the original hedge strategy. For hedge relationships discontinued because the forecasted transaction is not expected to occur according to the original strategy, any related derivative amounts recorded in other comprehensive income (loss) are immediately recognized in earnings. Foreign currency gains or losses associated with derivatives that do not qualify for hedge accounting are recorded within other income (expense) in the Company’s consolidated statements of operations, with the exception of foreign currency embedded derivatives contained in certain of the Company’s customer contracts (see "Revenue Recognition" below), which are recorded within revenues in the Company’s consolidated statements of operations. The Company does not use derivatives for speculative or trading purposes. For further information on derivatives and hedging activities, see Note 7 below. Fair Value of Financial Instruments The carrying value of the Company’s cash and cash equivalents, short-term investments, long-term investments and derivative instruments represent their fair value, while the Company’s accounts receivable, accounts payable and accrued expenses and accrued property, plant and equipment approximate their fair value due primarily to the short-term maturity of the related instruments. The fair value of the Company’s debt, which is traded in the public debt market, is based on quoted market prices. The fair value of the Company’s debt, which is not publicly traded, is estimated by considering the Company’s credit rating, current rates available to the Company for debt of the same remaining maturities and terms of the debt. Fair Value Measurements The Company measures and reports certain financial assets and liabilities at fair value on a recurring basis, including its investments in money market funds, certificates of deposit, publicly traded equity securities and derivatives. The Company also follows the accounting standard for the measurement of fair value for non-financial assets and liabilities on a nonrecurring basis. These include: • Non-financial assets and non-financial liabilities initially measured at fair value in a business combination or other new basis event, but not measured at fair value in subsequent reporting periods; • Reporting units and non-financial assets and non-financial liabilities measured at fair value for goodwill impairment tests; • Indefinite-lived intangible assets measured at fair value for impairment assessments; • Non-financial long-lived assets or asset groups measured at fair value for impairment assessments or disposal; and • Asset retirement obligations initially measured at fair value but not subsequently measured at fair value. For further information on fair value measurements, see Note 8 below. Revenue Recognition Equinix derives more than 90% of its revenues from recurring revenue streams, consisting primarily of (1) colocation, which includes the licensing of cabinet space and power; (2) interconnection offerings, such as cross connects and Equinix Exchange ports; (3) managed infrastructure solutions and (4) other revenues consisting of rental income from tenants or subtenants. The remainder of the Company’s revenues are from non-recurring revenue streams, such as installation revenues, certain professional services, contract settlements and equipment sales. Revenues from recurring revenue streams are generally billed monthly and recognized ratably over the term of the contract, generally one to three years for IBX data center colocation customers. Non-recurring installation fees, although generally paid in a lump sum upon installation, are deferred and recognized ratably over the period the customer is expected to benefit from the installation. Professional service fees are recognized in the period in which the services were provided and represent the culmination of a separate earnings process as long as they meet the criteria for separate recognition under the accounting standard related to revenue arrangements with multiple deliverables. Revenue from providing bandwidth access and equipment sales is recognized on a gross basis in accordance with the accounting standard related to reporting revenue gross as a principal versus net as an agent, primarily because the Company acts as the principal in the transaction, takes title to products and services and bears inventory and credit risk. To the extent the Company does not meet the criteria for recognizing bandwidth access and equipment services as gross revenue, the Company records the revenue on a net basis. Revenue from contract settlements, when a customer wishes to terminate their contract early, is generally recognized as the termination occurs, when no remaining related performance obligations exist and the customer is deemed to be creditworthy, to the extent that the revenue has not previously been recognized. The Company guarantees certain service levels, such as uptime, as outlined in individual customer contracts. If these service levels are not achieved due to any failure of the physical infrastructure or offerings, or in the event of certain instances of damage to customer infrastructure within the Company’s IBX data centers, the Company would generally reduce revenue for any credits or cash payments given to the customer as a result. The Company generally determines such service level credits and cash payments prior to the associated revenue being recognized, and historically, these credits and cash payments have generally not been significant. Revenue is recognized only when the service has been provided and when there is persuasive evidence of an arrangement, the fee is fixed or determinable and collection of the receivable is reasonably assured. It is the Company’s customary business practice to obtain a signed master sales agreement and sales order prior to recognizing revenue in an arrangement. Taxes collected from customers and remitted to governmental authorities are reported on a net basis and are excluded from revenue. As a result of certain customer agreements being priced in currencies different from the functional currencies of the parties involved, under applicable accounting rules, the Company is deemed to have foreign currency forward contracts embedded in these contracts. The Company refers to these as foreign currency embedded derivatives (see Note 7). These instruments are separated from their host contracts and held on the Company’s consolidated balance sheet at their fair value. The majority of these foreign currency embedded derivatives arise in certain of the Company’s subsidiaries where the local currency is the subsidiary’s functional currency and the customer contract is denominated in the U.S. dollar. Changes in their fair values are recognized within revenues in the Company’s consolidated statements of operations. The Company assesses collectability based on a number of factors, including past transaction history with the customer and the credit-worthiness of the customer. The Company generally does not request collateral from its customers although in certain cases the Company obtains a security interest in a customer’s equipment placed in its IBX data centers or obtains a deposit. If the Company determines that collection of a fee is not reasonably assured, the fee is deferred and revenue is recognized at the time collection becomes reasonably assured, which is generally upon receipt of cash. In addition, the Company also maintains an allowance for doubtful accounts for estimated losses resulting from the inability of its customers to make required payments for which the Company had expected to collect the revenues. If the financial condition of the Company’s customers were to deteriorate or if they became insolvent, resulting in an impairment of their ability to make payments, greater allowances for doubtful accounts may be required. Management specifically analyzes accounts receivable and current economic news and trends, historical bad debts, customer concentrations, customer credit-worthiness and changes in customer payment terms when evaluating revenue recognition and the adequacy of the Company’s reserves. Any amounts that were previously recognized as revenue and subsequently determined to be uncollectable are charged to bad debt expense included in general and administrative expense in the consolidated statements of operations. A specific bad debt reserve of up to the full amount of a particular invoice value is provided for certain problematic customer balances. An additional reserve is established for all other accounts based on the age of the invoices and an analysis of historical credits issued. Delinquent account balances are written-off after management has determined that the likelihood of collection is not probable. Income Taxes Income taxes are accounted for under the asset and liability method. Under this method, deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the year in which those temporary differences are expected to be recovered or settled. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in income in the period that includes the enactment date. Valuation allowances are established when necessary to reduce deferred tax assets to the amounts that are expected more likely than not to be realized in the future. A tax benefit from an uncertain income tax position may be recognized in the financial statements only if it is more likely than not that the position is sustainable, based solely on its technical merits and consideration of the relevant taxing authority’s widely understood administrative practices and precedents. The Company has been operating as a REIT for federal income tax purposes effective January 1, 2015. As a result, the Company may deduct the distributions made to its stockholders from taxable income generated by the Company and its qualified REIT subsidiaries ("QRSs"). The Company’s dividends paid deduction generally eliminates the U.S. taxable income of the Company and its QRSs, resulting in no U.S. income tax due. However, the Company's taxable REIT subsidiaries ("TRSs") will continue to be subject to income taxes on any taxable income generated by them. In addition, the foreign operations of the Company will continue to be subject to local income taxes regardless of whether the foreign operations are operated as a QRS or TRS. Stock-Based Compensation Stock-based compensation cost is measured at the grant date for all stock-based awards made to employees and directors based on the fair value of the award and is recognized as expense over the requisite service period, which is generally the vesting period. The Company grants restricted stock units to its employees and these equity awards generally have only a service condition. The Company grants restricted stock units to its executives and these awards generally have a service and performance condition or a service and market condition. To date, any performance conditions contained in an equity award are tied to the financial performance of the Company or a specific region of the Company. The Company assesses the probability of meeting these performance conditions on a quarterly basis. The majority of the Company’s equity awards vest over four years, although certain of the equity awards for executives vest

Acquisitions

Acquisitions	12 Months Ended
	Dec. 31, 2017
Business Combinations [Abstract]
Acquisitions	Acquisitions Proposed Acquisition of the Metronode group of companies On December 15, 2017, the Company entered into a transaction agreement with Ontario Teachers’ Pension Plan to acquire all of the equity interests in the Metronode group of companies, an Australian data center business, in an all-cash transaction for A $1.035 billion , or approximately $791.2 million at the exchange rate in effect on December 15, 2017. Metronode operates 10 data centers in six metro areas in Australia. The acquisition will further strengthen the Company’s leadership position in the Asia-Pacific region and support its ongoing global expansion. The acquisition is expected to close in the first half of 2018 and is subject to customary closing conditions including regulatory approval. The Company expects to account for the Metronode acquisition as a business combination using the acquisition method of accounting. Certain Verizon Data Center Assets Acquisition On May 1, 2017, the Company completed the acquisition of certain colocation business from Verizon consisting of 29 data center buildings located in the United States, Brazil and Colombia, for a cash purchase price of approximately $3.6 billion . The addition of these facilities and customers will further strengthen the Company's global platform by increasing interconnections and accelerating the Company's penetration of the enterprise and strategic markets, including government and energy. The Company funded the Verizon Data Center Acquisition with proceeds from debt and equity financings, which closed in January and March 2017 (See further discussions on the term loan borrowing and senior notes issuance in Note 10 and common stock issuance in Note 11). In connection with the Verizon Data Center Acquisition, the Company entered into a commitment letter (the "Commitment Letter"), dated December 6, 2016, pursuant to which a group of lenders committed to provide a senior unsecured bridge facility in an aggregate principal amount of $2.0 billion for the purposes of funding a portion of the cash consideration for the Verizon Data Center Acquisition. Following the completion of the debt and equity financings associated with the Verizon Data Center Acquisition in March 2017, the Company terminated the Commitment Letter. The Company paid $10.0 million of commitment fees associated with the Commitment Letter and recorded $2.2 million for the year ended December 31, 2016 and $7.8 million for the year ended December 31, 2017 to interest expense in the consolidated statements of operations. The Company included the Verizon Data Center Acquisition's results of operations from May 1, 2017 in its consolidated statements of operations and the estimated fair value of assets acquired and liabilities assumed in its consolidated balance sheets beginning May 1, 2017. The Company incurred acquisition costs of approximately $28.5 million and $7.6 million during the year ended December 31, 2017 and December 31, 2016, respectively, related to the Verizon Data Center Acquisition. Purchase Price Allocation The Verizon Data Center Acquisition constitutes a business under the accounting standard for business combinations and, therefore, was accounted for as a business combination using the acquisition method of accounting. Under the acquisition method of accounting, the total purchase price is allocated to the assets acquired and liabilities assumed measured at fair value on the date of acquisition. As of December 31, 2017 , the Company has not completed the detailed valuation analysis to derive the fair value of the following items, including but not limited to: property, plant and equipment, intangible assets and deferred taxes. Therefore, the allocation of the purchase price to assets acquired and liabilities assumed is based on provisional estimates and is subject to continuing management analysis, with assistance from third party valuation advisers. As of December 31, 2017, the Company has updated the preliminary allocation of purchase price for Verizon Data Center Acquisition from the provisional amounts reported as of June 30, 2017, which primarily resulted in a decrease in intangible assets of $9.0 million and an increase in goodwill of $7.7 million . The changes in fair value of acquired assets and liabilities assumed did not have a significant impact on the Company’s results of operations for any reporting periods prior to December 31, 2017. The Company may further adjust these amounts as valuations are finalized and the Company obtains information necessary to complete the analyses, but no later than one year from the acquisition date. The preliminary purchase price allocation is as follows (in thousands): Certain Verizon Data Center Assets Cash and cash equivalents $ 1,073 Accounts receivable 2,019 Other current assets 7,319 Property, plant, and equipment 840,335 Intangible assets (1) 1,693,900 Goodwill 1,095,262 Total assets acquired 3,639,908 Accounts payable and accrued liabilities (1,725 ) Other current liabilities (2,020 ) Capital lease and other financing obligations (17,659 ) Deferred tax liabilities (18,129 ) Other liabilities (5,689 ) Net assets acquired $ 3,594,686 (1) The nature of the intangible assets acquired is customer relationships with an estimated useful life of 15 years. Included in this amount is a customer relationship intangible asset for Verizon totaling $245.3 million . Pursuant to the acquisition agreement, the Company formalized agreements to provide pre-existing space and services to Verizon at the acquired data centers. The fair value of customer relationships was estimated by applying an income approach. The fair value was determined by calculating the present value of estimated future operating cash flows generated from existing customers less costs to realize the revenue. The Company applied discount rates ranging from 7.7% to 12.2% , which reflected the nature of the assets as they relate to the risk and uncertainty of the estimated future operating cash flows. Other significant assumptions used to estimate the fair value of customer relationships include projected revenue growth, customer attrition rates, sales and marketing expenses and operating margins. The fair value measurements were based on significant inputs that are not observable in the market and thus represent Level 3 measurements as defined in the accounting standard for fair value measurements. The fair value of property, plant and equipment was estimated by applying the cost approach. The cost approach is to use the replacement or reproduction cost as an indicator of fair value. The premise of the cost approach is that a market participant would pay no more for an asset than the amount for which the asset could be replaced or reproduced. The key assumptions of the cost approach include replacement cost new, physical deterioration, functional and economic obsolescence, economic useful life, remaining useful life, age and effective age. Goodwill represents the excess of the purchase price over the fair value of the net tangible and intangible assets acquired and liabilities assumed. The goodwill is attributable to the workforce of the acquired business and the projected revenue increase expected to arise from future customers after the Verizon Data Center Acquisition. The goodwill is not expected to be deductible for local tax purposes. Goodwill recorded as a result of the Verizon Data Center Acquisition was attributable to the Company's Americas region. The Company's results of continuing operations include the Verizon Data Center Acquisition's revenues of $359.1 million and net income from continuing operations of $87.8 million for the period May 1, 2017 through December 31, 2017 . Other 2017 Acquisitions In addition to the Verizon Data Center Acquisition, the Company completed three other acquisitions during 2017. The Company incurred acquisition costs of approximately $8.1 million in total during the year ended December 31, 2017 related to these acquisitions. A summary of the allocation of total purchase consideration is presented as follows (in thousands): Itconic Zenium data center IO UK's data center Cash and cash equivalents $ 15,659 $ 692 $ 1,388 Accounts receivable 16,429 198 7 Other current assets 1,885 6,430 1,082 Property, plant, and equipment 68,051 53,749 40,251 Intangible assets 99,993 6,400 6,252 Goodwill 125,112 23,077 15,804 Deferred tax assets — — 6,714 Other assets 4,025 5,494 3,396 Total assets acquired 331,154 96,040 74,894 Accounts payable and accrued liabilities (15,846 ) (1,012 ) (439 ) Other current liabilities (12,374 ) (451 ) (168 ) Capital lease and other financing obligations (30,666 ) — (33,091 ) Loans payable (3,253 ) — (4,067 ) Deferred tax liabilities (2,389 ) (1,969 ) — Other liabilities (7,515 ) (614 ) (828 ) Net assets acquired $ 259,111 $ 91,994 $ 36,301 On October 9, 2017, the Company completed the acquisition of Itconic for a cash purchase price of €220.5 million or $259.1 million at the exchange rate in effect on October 9, 2017. Itconic is a data center provider in Spain and Portugal, and also includes CloudMas, an Itconic subsidiary which is focused on supporting enterprise adoption and use of cloud services. The acquisition includes five data centers in four metro areas, with two located in Madrid and one each in Barcelona, Seville and Lisbon. Itconic’s operating results will be reported in the EMEA region following the date of acquisition. The nature of the intangible assets acquired from the Itconic acquisition is customer relationships with an estimated useful life of 15 years . The fair value of customer relationships was estimated by applying an income approach, by calculating the present value of estimated future operating cash flows generated from existing customers less costs to realize the revenue. The Company applied discount rate of 16.0% , which reflects the risk and uncertainty of the estimated future operating cash flows. Other significant assumptions include projected revenue growth, customer attrition rates and operating margins. The fair value measurements were based on significant inputs that are not observable in the market and thus represent Level 3 measurements as defined in the accounting standard for fair value measurements. Goodwill is attributable to the workforce of the acquired business and the projected revenue increase from future customers expected to arise after the acquisition. On October 6, 2017, the Company acquired Zenium's a data center business in Istanbul for a cash payment of approximately $92.0 million . The acquired facility located in Istanbul, Turkey will be renamed as the Istanbul 2 ("IS2") data center. IS2’s operating results will be reported in the EMEA region following the date of acquisition. The nature of the intangible assets acquired from this acquisition is customer relationships with an estimated useful life of 15 years. As of December 31, 2017, the Company has not completed the detailed valuation analysis of Itconic or the Zenium data center to derive the fair value of the following items including, but not limited to: property, plant and equipment, intangible assets and deferred taxes; therefore, the allocation of the purchase price to assets acquired and liabilities assumed is based on provisional estimates and is subject to continuing management analysis. On February 3, 2017, the Company acquired IO UK's data center operating business in Slough, United Kingdom, for a cash payment of approximately $36.3 million . The acquired facility was renamed as the London 10 ("LD10") data center. LD10's operating results will be reported in the EMEA region following the date of acquisition. The nature of the intangible assets acquired from this acquisition is customer relationships with an estimated useful life of 10 years. As of December 31, 2017, the Company has finalized the allocation of purchase price for the IO Acquisition from the provisional amounts first reported as of March 31, 2017 and the adjustments made during the year ended December 31, 2017 were not significant. The changes in fair value of acquired assets and liabilities assumed did not have a significant impact on the Company’s results of operations for any reporting periods prior to December 31, 2017. Goodwill from the acquisitions of Itconic, the Zenium data center and IO UK's data center is not expected to be deductible for local tax purposes and is attributable to the Company's EMEA region. The Company's results of continuing operations include $22.4 million of revenues from the combined operations of Itconic, the Zenium data center and IO UK’s data center and an insignificant net loss from continuing operations for the periods from their respective dates of acquisition through December 31, 2017. TelecityGroup Acquisition On January 15, 2016, the Company completed the acquisition of the entire issued and to be issued share capital of TelecityGroup. TelecityGroup operated data center facilities in cities across Europe. The acquisition of TelecityGroup enhances the Company's existing data center portfolio by adding new IBX metro markets in Europe including Dublin, Helsinki, Istanbul, Manchester, Milan, Sofia, Stockholm and Warsaw. As a result of the transaction, TelecityGroup has become a wholly-owned subsidiary of Equinix. Under the terms of the acquisition, the Company acquired all outstanding shares of TelecityGroup and all vested equity awards of TelecityGroup at 572.5 pence in cash and 0.0336 new shares of Equinix common stock for a total purchase consideration of approximately £2,624.5 million or approximately $3,743.6 million at the exchange rate in effect on the acquisition date. In addition, the Company assumed $1.3 million of vested TelecityGroup's employee equity awards as part of consideration transferred. The Company incurred acquisition costs of approximately $42.5 million and $38.3 million during the year ended December 31, 2016 and December 31, 2015, respectively, related to the TelecityGroup acquisition. In connection with the TelecityGroup acquisition, the Company placed £322.9 million or approximately $475.7 million into a restricted cash account, which was included in the current portion of restricted cash in the consolidated balance sheet as of December 31, 2015. The cash was released upon completion of the acquisition. Also, in connection with the TelecityGroup acquisition, the Company entered into a bridge credit agreement with a group of lenders for a principal amount of £875.0 million or approximately $1,289.0 million at the exchange rate in effect on December 31, 2015 (the "Bridge Loan"). The Company did not make any borrowings under the Bridge Loan and the Bridge Loan was terminated on January 8, 2016. Purchase Price Allocation Under the acquisition method of accounting, the assets acquired and liabilities assumed in a business combination shall be measured at fair value at the date of the acquisition. As of December 31, 2016, the Company had completed the detailed valuation analysis to derive the fair value of assets acquired and liabilities assumed and had updated the final allocation of purchase price from provisional amounts reported as of March 31, 2016, which primarily resulted in increases to intangible assets of $36.8 million and deferred tax liabilities of $19.5 million and decreases in capital lease and other financing obligations of $34.4 million , goodwill of $22.5 million and assets held for sale of $36.9 million . The adjustments in fair value of acquired assets and liabilities assumed did not have a significant impact on the Company’s results of operations for any reporting periods prior to December 31, 2016. As of the acquisition date, the allocation of the purchase price was as follows (in thousands): TelecityGroup Cash and cash equivalents $ 73,368 Accounts receivable 24,042 Other current assets 41,079 Assets held for sale 877,650 Property, plant and equipment 1,058,583 Goodwill 2,215,567 Intangible assets 694,243 Deferred tax assets 994 Other assets 4,102 Total assets acquired 4,989,628 Accounts payable and accrued expenses (84,367 ) Accrued property, plant and equipment (3,634 ) Other current liabilities (27,233 ) Liabilities held for sale (155,650 ) Capital lease and other financing obligations (165,365 ) Mortgage and loans payable (592,304 ) Deferred tax liabilities (176,168 ) Other liabilities (40,021 ) Net assets acquired $ 3,744,886 The purchase price allocation above, as of the acquisition date, included acquired assets and liabilities that were classified by the Company as held for sale (Note 4). The following table presents certain information on the acquired intangible assets (dollars in thousands): Intangible Assets Fair Value Estimated Useful Lives (Years) Weighted-average Estimated Useful Lives (Years) Customer relationships $ 591,956 13.5 13.5 Trade names 72,033 1.5 1.5 Favorable leases 30,254 2.0 - 25.4 19.7 The fair value of customer relationships was estimated by applying an income approach. The fair value was determined by calculating the present value of estimated future operating cash flows generated from existing customers less costs to realize the revenue. The Company applied a weighted-average discount rate of approximately 8.5% , which reflected the nature of the assets as it relates to the estimated future operating cash flows. Other significant assumptions used to estimate the fair value of the customer relationships include projected revenue growth, customer attrition rates, sales and marketing expenses and operating margins. The fair value of the TelecityGroup's trade names was estimated using the relief of royalty approach. The Company applied a relief of royalty rate of 2.0% and a weighted-average discount rate of approximately 9.0% . The other acquired identifiable intangible assets were estimated by applying a relief of royalty or cost approach as appropriate. The fair value measurements were based on significant inputs that are not observable in the market and thus represent Level 3 measurements as defined in the accounting standard for fair value measurements. The fair value of the property, plant and equipment was estimated by applying the income approach or cost approach. The income approach is used to estimate fair value based on the income stream, such as cash flows or earnings that an asset can be expected to generate over its useful life. There are two primary methods of applying the income approach to determine the fair value of assets: the discounted cash flow method and the direct capitalization method. The key assumptions include the estimated earnings, discount rate and direct capitalization rate. The cost approach is to use the replacement or reproduction cost as an indicator of fair value. The premise of the cost approach is that a market participant would pay no more for an asset than the amount for which the asset could be replaced or reproduced. The key assumptions of the cost approach include replacement cost, physical deterioration, functional and economic obsolescence, economic useful life, remaining useful life, age and effective age. The Company determined the fair value of the loans payable assumed in the TelecityGroup acquisition by estimating TelecityGroup’s debt rating and reviewing market data with a similar debt rating and other characteristics of the debt, including the maturity date and security type. On January 15, 2016, the Company prepaid and terminated these loans payable. In conjunction with the repayment of the loans payable, the Company incurred an insignificant amount of pre-payment penalties and interest rate swap termination costs, which were recorded as interest expense in the consolidated statement of operations. Goodwill represents the excess of the purchase price over the fair value of the net tangible and intangible assets acquired and liabilities assumed. The goodwill is attributable to the workforce of the acquired business and the significant synergies expected to arise after the acquisition. Goodwill is not expected to be deductible for local tax purposes. Goodwill recorded as a result of the TelecityGroup acquisition, except for the goodwill associated with asset held for sale, is attributable to the Company’s EMEA region. The Company's results of continuing operations include TelecityGroup revenues of $400.0 million and net loss from continuing operations of $47.1 million for the period January 15, 2016 through December 31, 2016. Other 2016 Acquisition In addition to the TelecityGroup Acquisition, the Company completed one other acquisition during 2016. A summary of the allocation of total purchase consideration is presented as follows (in thousands): Paris IBX data center Cash and cash equivalent $ 4,073 Accounts receivable 1,507 Other current assets 794 Property, plant and equipment 143,972 Intangible assets 11,758 Goodwill 48,835 Other assets 81 Total assets acquired 211,020 Accounts payable and accrued liabilities (2,044 ) Other current liabilities (2,798 ) Deferred tax liabilities (42,395 ) Other liabilities (755 ) Net assets acquired $ 163,028 On August 1, 2016, the Company completed the purchase of Digital Realty Trust, Inc.'s ("Digital Realty's") operating business, including its real estate and facility, located in St. Denis, Paris for cash consideration of approximately €193.8 million or $216.4 million at the exchange rate in effect on August 1, 2016. A portion of the building was leased to the Company and was being used by the Company as its Paris 2 and Paris 3 data centers. The Paris 2 lease was accounted for as an operating lease and the Paris 3 lease was accounted for as a financing lease. Upon acquisition, the Company in effect terminated both leases. The Company settled the financing lease obligation of Paris 3 for €47.8 million or approximately $53.4 million and recognized a loss on debt extinguishment of €8.8 million or approximately $9.9 million . The nature of the purchased intangible assets acquired is in-place leases and favorable leasehold interests with weighted average estimated useful lives of 4.3 and 5.3 years, respectively. The goodwill is attributable to the Company's EMEA segment and is not expected to be deductible for local tax purposes. The Company's results of continuing operations include the Paris IBX Data Center Acquisition revenues of $4.1 million and insignificant net income from continuing operations for the period August 1, 2016 through December 31, 2016. The Company incurred acquisition costs of approximately $12.0 million for the year ended December 31, 2016 related to the Paris IBX Data Center Acquisition. Bit-isle Acquisition On November 2, 2015, the Company, acting through its Japanese subsidiary, completed a cash tender offer for approximately 97% of the equity instruments, including stock options, of Tokyo-based Bit-isle. The Company acquired the remaining outstanding equity instruments of Bit-isle in December 2015. The offer price was JPY 922 per share, in an all cash transaction totaling ¥33,196.0 million or approximately $275.4 million at the exchange rate in effect on the date of the acquisition. On September 30, 2015, the Company, acting through its Japanese subsidiaries as borrowers, entered into a term loan agreement (the "Bridge Term Loan Agreement") with the Bank of Tokyo-Mitsubishi UFJ, Ltd. ("BTMU"). Pursuant to the Bridge Term Loan Agreement, BTMU committed to provide a senior bridge loan facility (the "Bridge Term Loan") in the amount of up to ¥47,500.0 million , or approximately $395.7 million at the exchange rate in effect on September 30, 2015. Proceeds from the Bridge Term Loan were to be used exclusively for the acquisition of Bit-isle, the repayment of Bit-isle’s existing debt and transaction costs incurred in connection with the closing of the Bridge Term Loan and the acquisition of Bit-isle. In October 2016, the Company borrowed ¥47,500.0 million on a five year term loan agreement with BTMU and repaid the Bridge Term Loan. See Note 10 for further information. Purchase Price Allocation Under the acquisition method of accounting, the total purchase price was allocated to Bit-isle’s net tangible and intangible assets based upon their fair value as of the Bit-isle acquisition date. Based upon the purchase price and the valuation of Bit-isle, the final purchase price allocation was as follows (in thousands): Bit-isle Cash and cash equivalent $ 33,198 Accounts receivable 7,359 Other current assets 51,038 Long-term investments 3,806 Property, plant and equipment 308,985 Goodwill 95,444 Intangible assets 111,374 Other assets 22,981 Total assets acquired 634,185 Accounts payable and accrued expenses (15,028 ) Accrued property, plant and equipment (465 ) Capital lease and other financing obligations (108,833 ) Mortgage and loans payable (190,227 ) Other current liabilities (8,689 ) Deferred tax liabilities (32,192 ) Other liabilities (3,384 ) Net assets acquired $ 275,367 The following table presents certain information on the acquired identifiable intangible assets (dollars in thousands): Intangible Assets Fair Value Estimated Useful Lives (Years) Weighted-average Estimated Useful Lives (Years) Customer relationships $ 105,434 13 13 Trade name 3,455 2 2 Favorable solar contracts 2,410 18 18 Other intangible assets 75 0.25 0.25 The fair value of customer relationships was estimated by applying an income approach. The fair value was determined by calculating the present value of estimated future operating cash flows generated from existing customers less costs to realize the revenue. The Company applied a weighted-average discount rate of approximately 11.0% , which reflected the nature of the assets as it relates to the estimated future operating cash flows. Other significant assumptions used to estimate the fair value of the customer relationships include projected revenue growth, customer attrition rates, sales and marketing expenses and operating margins. The fair value of the Bit-isle trade name was estimated using the relief of royalty approach. The Company applied a relief of royalty rate of 2.0% and a weighted-average discount rate of approximately 12.0% . The other acquired identifiable intangible assets were estimated by applying an income or cost approach as appropriate. The fair value measurements were based on significant inputs that are not observable in the market and thus represent Level 3 measurements as defined in the accounting standard for fair value measurements. The fair value of the property, plant and equipment was estimated by applying the income approach or cost approach. The income approach is used to estimate fair value based on the income stream, such as cash flows or earnings that an asset can be expected to generate over its useful live. There are two primary methods of applying the income approach to determine the fair value assets: the discounted cash flow method and the direct capitalization method. The key assumptions include the estimated earnings, discount rate and direct capitalization rate. The cost approach is to use the replacement or reproduction cost as an indicator of fair value. The premise of the cost approach is that a market participant would pay no more for an asset than the amount that the asset could be replaced or reproduced. The key assumptions of the cost approach include replacement cost new, physical deterioration, functional and economic obsolescence, economic useful life, remaining useful life, age and effective age. The goodwill is attributable to the workforce of the acquired business and the significant synergies expected to arise after the acquisition. The goodwill is not expected to be deductible for local tax purposes. Goodwill recorded as a result of the Bit-isle acquisition is attributable to the Company’s Asia-Pacific reportable segment. The Company's results of continuing operations include Bit-isle revenues of $21.6 million and net losses from continuing operations of $3.2 million for the period from November 2, 2015 through December 31, 2015. The Company incurred acquisition costs of approximately $8.6 million for the year ended December 31, 2015 related to the Bit-isle Acquisition. In June 2016, the Company approved the divestiture of the solar power assets of Bit-isle. See Note 4 below for further information. Nimbo Acquisition On January 14, 2015, the Company acquired all of the issued and outstanding share capital of Nimbo Technologies Inc., a company which specializes in migrating business applications to the cloud with extensive experience moving legacy applications into a hybrid cloud architecture, and connecting legacy data centers to the cloud, for a cash payment of $10.0 million (the "Nimbo Acquisition"). As a result of the Nimbo Acquisition, the Company recorded goodwill of $17.2 million . Nimbo continues to operate under the Nimbo name. The results of operations for Nimbo are not significant to the Company. Unaudited Pro Forma Combined Consolidated Financial Information The following unaudited pro forma combined consolidated financial information has been prepared by the Company using the acquisition method of accounting to give effect to the Verizon Data Center Acquisition as though it occurred on January 1, 2016 and the TelecityGroup acquisition as though it occurred on January 1, 2015. The incremental results of operations from the other acquisitions are not significant and are therefore not reflected in the pro forma combined results of operations. The Company completed the Verizon Data Center Acquisition on May 1, 2017. The unaudited pro forma combined consolidated financial information for the years ending December 31, 2017 and 2016 combine the actual results of the Company and the actual Verizon Data Center Acquisition operating results for the period prior to the acquisition date and reflect certain adjustments, such as additional depreciation, amortization and interest expense on assets and liabilities acquired and acquisition financings. The Company and Verizon entered into agreements at the closing of the Verizon Data Center Acquisition pursuant to which the Company will provide space and services to Verizon at the acquired data centers. These arrangements are not reflected in the unaudited pro forma combined financial information. The Company recognized $359.1 million of revenues attributed to the Verizon Data Center Acquisition, which included these arrangements, from May 1 through December 31, 2017 . The Company completed the TelecityGroup acquisition on January 15, 2016. The unaudited pro forma combined consolidated financial information for the year ending December 31, 2015 combine the actual results of the Company and the actual TelecityGroup's operating results for the year ending December 31, 2015 and reflect certain adjustments, such as additional depreciation, amortization and interest expense on assets and liabilities acquired and acquisition financings. The pro forma effect for the period January 1 through January 14, 2016 was not significant. The unaudited pro forma combined consolidated financial information is presented for illustrative purposes only and is not necessarily indicative of the results of operations that would have actually been reported had the acquisition occurred on the above dates, nor is it necessarily indicative of the future results of operations of the combined company. The following table sets forth the unaudited pro forma consolidated combined results of operations for the years ended December 31, 2017 , 2016 and 2015 (in thousands): 2017 2016 2015 Revenues $ 4,509,602 $ 4,053,280 $ 3,244,349 Net income from continuing operations 258,618 19,248 141,496 Basic EPS 3.31 0.25 2.10 Diluted EPS 3.28 0.25 2.08

Earnings Per Share

Earnings Per Share	12 Months Ended
	Dec. 31, 2017
Earnings Per Share [Abstract]
Earnings Per Share	Earnings Per Share The following table sets forth the computation of basic and diluted EPS for the years ended December 31 (in thousands, except per share amounts): 2017 2016 2015 Net income from continuing operations $ 232,982 $ 114,408 $ 187,774 Net income from discontinued operations, net of tax — 12,392 — Net income $ 232,982 $ 126,800 $ 187,774 Weighted-average shares used to calculate basic EPS 76,854 70,117 57,790 Effect of dilutive securities: Employee equity awards 681 699 693 Weighted-average shares used to calculate diluted EPS 77,535 70,816 58,483 Basic EPS: Continuing operations $ 3.03 $ 1.63 $ 3.25 Discontinued operations — 0.18 — Basic EPS $ 3.03 $ 1.81 $ 3.25 Diluted EPS: Continuing operations $ 3.00 $ 1.62 $ 3.21 Discontinued operations — 0.17 — Diluted EPS $ 3.00 $ 1.79 $ 3.21 The following table sets forth potential shares of common stock that are not included in the diluted EPS calculation above because to do so would be anti-dilutive for the years ended December 31 (in thousands): 2017 2016 2015 Shares related to the potential conversion of 4.75% convertible subordinated notes — 893 1,977 Common stock related to employee equity awards 63 27 88 63 920 2,065

Assets Held for Sale

Assets Held for Sale	12 Months Ended
	Dec. 31, 2017
Discontinued Operations and Disposal Groups [Abstract]
Assets Held for Sale	Assets Held for Sale In June 2016, the Company approved the divestiture of the solar power assets of Bit-isle. In October 2016, the Company entered into a Share Transfer Agreement for the transfer of common stock of Terra Power Co., Ltd., relating to the divestiture of the solar power assets of Bit-isle. The Company received ¥400.0 million upon the closing of the transaction, or approximately $3.8 million at the exchange rate in effect on October 31, 2016. In November 2016, the Company had received an additional ¥2,500.0 million , or approximately $22.1 million at the exchange rate in effect at the time of receipt. The Company received the remaining payment of ¥5,313.4 million in the first quarter of 2017, or approximately $47.8 million at the exchange rate in effect on March 31, 2017. During the three months ended September 30, 2016, the Company evaluated the recoverability of the carrying value of its assets held for sale related to the sales agreement signed in October, as discussed above, and concluded that the Company would not recover the carrying value of certain assets. Accordingly, the Company recorded an impairment charge on other current assets of $7.7 million at September 30, 2016, reducing the carrying value of such assets from $79.5 million to the estimated fair value of $71.8 million . The associated loss on the sale was not significant. Furthermore, the revenue and net income generated by the solar power assets of Bit-isle during the years ended December 31, 2016 and 2015 were not significant. During the fourth quarter of 2015, the Company and TelecityGroup agreed to divest certain data centers, including the Company’s London 2 ("LD2") data center and certain data centers of TelecityGroup in the United Kingdom, Netherlands and Germany, in order to obtain the approval of the European Commission for the acquisition of TelecityGroup. The assets and liabilities of LD2 were classified as held for sale in the fourth quarter of 2015 and, therefore, the corresponding depreciation and amortization expense was ceased at that time. This divestiture was not presented as discontinued operations in the consolidated statements of operations, because it did not represent a strategic shift in the Company's business, as the Company continued operating similar businesses after the divestiture. The assets and liabilities of data centers from TelecityGroup were classified as held for sale on January 15, 2016, upon close TelecityGroup acquisition. The divestiture of these data centers was completed on July 5, 2016. The Company recognized a gain on the sale of LD2 data center of $27.9 million in gains on asset sales in the consolidated statements of operations for the year ended December 31, 2016. During the years ended December 31, 2016 and 2015, the LD2 data center generated revenue of $6.1 million and $17.6 million , respectively, and net income of $2.3 million and $7.2 million , respectively. The results of operations for the TelecityGroup data centers that were divested, as well as the gain on divestiture, were classified as discontinued operations from January 15, 2016, the date the acquisition closed, through July 5, 2016 (see Note 5). During the fourth quarter of 2015, the Company entered into an agreement to sell a parcel of land in San Jose, California. The sale was completed in February 2016 and the Company recognized a gain on sale of $5.2 million .

Discontinued Operations

Discontinued Operations	12 Months Ended
	Dec. 31, 2017
Discontinued Operations and Disposal Groups [Abstract]
Discontinued Operations	Discontinued Operations In order to obtain the approval of the European Commission for the acquisition of TelecityGroup, the Company and TelecityGroup agreed to divest certain data centers of TelecityGroup in the United Kingdom, Netherlands and Germany. These TelecityGroup data centers were classified as held for sale on the acquisition date and were reported as discontinued operations. On July 5, 2016, the Company completed the sale of these data centers and related assets to Digital Realty for approximately €304.6 million and £376.2 million , or approximately total of $827.3 million at the exchange rates in effect on July 5, 2016. The Company recognized a gain on sale of the TelecityGroup data centers in discontinued operations of $2.4 million . The results of operations for these data centers that were divested, as well as the gain on divestiture, have been reported as net income from discontinued operations, net of tax, from January 15, 2016, the date of the acquisition, to July 5, 2016 in the Company's consolidated statements of operations. As of the date of acquisition, depreciation and amortization of discontinued operations ceased. Capital expenditures from the date of acquisition through the date of sale were $31.5 million . The following table presents the financial results of the Company's discontinued operations for the year ended December 31, 2016 (in thousands). The Company did not record income from discontinued operations, net of tax for the years ended December 31, 2017 and 2015. 2016 Revenues $ 48,782 Costs and operating expenses: Cost of revenues 24,795 Sales and marketing 1,030 General and administrative 7,026 Total costs and operating expenses 32,851 Income from operations of discontinued operations 15,931 Interest expense and other, net (1,286 ) Income from discontinued operations before income taxes 14,645 Income tax expense (4,604 ) Gain on sale of discontinued operations, net of tax 2,351 Net income from discontinued operations, net of tax $ 12,392

Balance Sheet Components

Balance Sheet Components	12 Months Ended
	Dec. 31, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Balance Sheet Components	Balance Sheet Components Cash, Cash Equivalents and Short-Term and Long-Term Investments Cash, cash equivalents and short-term and long-term investments consisted of the following as of December 31 (in thousands): 2017 2016 Cash and cash equivalents: Cash (1) $ 985,382 $ 345,119 Cash equivalents: Money market funds 427,135 400,388 Certificate of deposit — 2,969 Total cash and cash equivalents 1,412,517 748,476 Short-term and long-term investments: Certificates of deposit 31,351 6,988 Publicly traded equity securities 6,163 6,463 Total short-term and long-term investments 37,514 13,451 Total cash, cash equivalents and short-term and long-term investments $ 1,450,031 $ 761,927 _________________________ (1) Excludes restricted cash. As of December 31, 2017 and 2016 , cash and cash equivalents included investments which were readily convertible to cash and had original maturity dates of 90 days or less. The maturities of certificates of deposit classified as short-term investments were one year or less as of December 31, 2017 and 2016 . The maturities of certificates of deposits classified as long-term investments were greater than one year and less than three years as of December 31, 2017 and 2016 . The balance of certificates of deposits, by contractual maturity, as of December 31 (in thousands): 2017 2016 Due within one year $ 28,271 $ 3,409 Due after one year through three years 3,080 3,579 Total $ 31,351 $ 6,988 The net unrealized gains (losses) on its investments as of December 31 were comprised of the following (in thousands): 2017 2016 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value Certificate of deposit $ 31,351 $ — $ — $ 31,351 $ 6,988 $ — $ — $ 6,988 Publicly traded equity securities 3,716 2,447 — 6,163 4,850 1,613 — 6,463 Total $ 35,067 $ 2,447 $ — $ 37,514 $ 11,838 $ 1,613 $ — $ 13,451 Accounts Receivable Accounts receivable, net, consisted of the following as of December 31 (in thousands): 2017 2016 Accounts receivable $ 594,541 $ 411,920 Allowance for doubtful accounts (18,228 ) (15,675 ) Accounts receivable, net $ 576,313 $ 396,245 Trade accounts receivable are recorded at the invoiced amount and generally do not bear interest. The following table summarizes the activity of the Company’s allowance for doubtful accounts (in thousands): Balance as of December 31, 2014 $ 9,466 Provision for allowance for doubtful accounts 5,037 Net write-offs (3,438 ) Impact of foreign currency exchange (713 ) Balance as of December 31, 2015 10,352 Provision for allowance for doubtful accounts 8,260 Net write-offs (2,521 ) Impact of foreign currency exchange (416 ) Balance as of December 31, 2016 15,675 Provision for allowance for doubtful accounts 5,627 Net write-offs (4,546 ) Impact of foreign currency exchange 1,472 Balance as of December 31, 2017 $ 18,228 Other Current Assets Other current assets consisted of the following as of December 31 (in thousands): 2017 2016 Prepaid expenses $ 64,832 $ 79,258 Taxes receivable 110,961 102,002 Restricted cash, current 26,919 15,065 Other receivables 7,797 46,809 Derivative instruments 4,175 54,072 Other current assets 17,343 22,190 Total other current assets $ 232,027 $ 319,396 Property, Plant and Equipment, Net Property, plant and equipment, net consisted of the following as of December 31 (in thousands): 2017 2016 Core systems $ 6,334,702 $ 4,760,868 Buildings 3,906,686 2,785,799 Leasehold improvements 1,850,351 1,599,424 Construction in progress 425,428 645,388 Personal property 798,133 622,069 Land 423,539 237,349 13,738,839 10,650,897 Less accumulated depreciation (4,344,237 ) (3,451,687 ) Property, plant and equipment, net $ 9,394,602 $ 7,199,210 Core systems, buildings, leasehold improvements, personal property and construction in progress recorded under capital leases aggregated to $760.4 million and $715.3 million as of December 31, 2017 and 2016 , respectively. As of December 31, 2017 and 2016 , the Company recorded accumulated depreciation for assets under capital leases of $199.2 million and $161.4 million , respectively. Goodwill and Other Intangibles The following table presents goodwill and other intangible assets, net, for the years ended December 31, 2017 and 2016 (in thousands): 2017 2016 Goodwill: Americas $ 1,561,512 $ 469,438 EMEA 2,610,899 2,281,306 Asia-Pacific 239,351 235,320 $ 4,411,762 $ 2,986,064 Intangible assets, net: Intangible assets - customer relationships $ 2,682,656 $ 839,593 Intangible assets - trade names 73,295 69,519 Intangible assets - favorable leases 39,470 38,139 Intangible assets - licenses 9,696 9,697 Intangible assets - others — 19 2,805,117 956,967 Accumulated amortization - customer relationships (334,985 ) (183,270 ) Accumulated amortization - trade names (71,728 ) (43,830 ) Accumulated amortization - favorable leases (10,196 ) (8,027 ) Accumulated amortization - licenses (3,236 ) (2,591 ) Accumulated amortization - others — (18 ) (420,145 ) (237,736 ) Total intangible assets, net $ 2,384,972 $ 719,231 Changes in the carrying amount of goodwill by geographic regions are as follows (in thousands): Americas EMEA Asia-Pacific Total Balance as of December 31, 2015 $ 460,203 $ 374,070 $ 228,927 $ 1,063,200 Purchase accounting adjustments - TelecityGroup — 2,215,567 — 2,215,567 Purchase accounting adjustments - Paris IBX Data Center Acquisition — 48,835 — 48,835 Asset held for sale adjustments — 1,605 — 1,605 Impact of foreign currency exchange 9,235 (358,771 ) 6,393 (343,143 ) Balance as of December 31, 2016 469,438 2,281,306 235,320 2,986,064 Purchase accounting adjustments - Verizon Data Center Acquisition 1,095,262 — 1,095,262 Purchase accounting adjustments - Other 2017 acquisitions — 163,993 — 163,993 Impact of foreign currency exchange (3,188 ) 165,600 4,031 166,443 Balance as of December 31, 2017 $ 1,561,512 $ 2,610,899 $ 239,351 $ 4,411,762 Changes in the net book value of intangible assets by geographic regions are as follows (in thousands): Americas EMEA Asia-Pacific Total Balance as of December 31, 2014 $ 62,954 $ 62,185 $ 22,388 $ 147,527 Nimbo acquisition 1,089 — — 1,089 Bit-isle acquisition — — 111,374 111,374 Asset held for sale adjustments — (784 ) — (784 ) Write-off of intangible asset — (357 ) — (357 ) Amortization of intangibles (11,432 ) (11,675 ) (4,339 ) (27,446 ) Impact of foreign currency exchange (1,968 ) (5,014 ) 144 (6,838 ) Balance as of December 31, 2015 50,643 44,355 129,567 224,565 TelecityGroup acquisition — 694,243 — 694,243 Paris IBX Data Center Acquisition — 11,758 — 11,758 Sale of Terra Power — — (2,460 ) (2,460 ) Write-off of intangible asset (573 ) — — (573 ) Amortization of intangibles (11,348 ) (97,715 ) (13,799 ) (122,862 ) Impact of foreign currency exchange 1,395 (90,280 ) 3,445 (85,440 ) Balance as of December 31, 2016 40,117 562,361 116,753 719,231 Verizon Data Center Acquisition 1,693,900 — — 1,693,900 Other 2017 acquisitions — 112,645 — 112,645 Write-off of intangible asset — (725 ) — (725 ) Amortization of intangibles (84,749 ) (79,105 ) (13,154 ) (177,008 ) Impact of foreign currency exchange (2,895 ) 36,043 3,781 36,929 Balance as of December 31, 2017 $ 1,646,373 $ 631,219 $ 107,380 $ 2,384,972 The Company’s goodwill and intangible assets in EMEA, denominated in Euros, British Pounds, Turkish Lira, and the United Arab Emirates Dirham, goodwill and intangible assets in Asia-Pacific, denominated in Singapore Dollars, Hong Kong Dollars, Japanese Yen and Chinese Yuan and certain goodwill and intangibles in Americas, denominated in Canadian Dollars, Brazilian Reals and Colombian Pesos, are subject to foreign currency fluctuations. The Company’s foreign currency translation gains and losses, including goodwill and intangibles, are a component of other comprehensive income and loss. Estimated future amortization expense related to these intangibles is as follows (in thousands): Years ending: 2018 $ 196,469 2019 191,298 2020 184,602 2021 176,740 2022 172,547 Thereafter 1,463,316 Total $ 2,384,972 Other Assets Other assets consisted of the following as of December 31 (in thousands): 2017 2016 Deferred tax assets, net $ 66,031 $ 62,308 Prepaid expenses 89,784 80,888 Debt issuance costs, net 10,670 6,611 Deposits 48,296 40,893 Restricted cash 11,265 9,706 Derivative instruments 4,110 15,907 Other assets 11,594 9,985 Total other assets $ 241,750 $ 226,298 Accounts Payable and Accrued Expenses Accounts payable and accrued expenses consisted of the following as of December 31 (in thousands): 2017 2016 Accounts payable $ 101,744 $ 60,211 Accrued compensation and benefits 214,585 172,808 Accrued interest 100,347 95,832 Accrued taxes (1) 130,272 133,562 Accrued utilities and security 68,916 44,202 Accrued professional fees 13,830 14,071 Accrued repairs and maintenance 11,232 5,430 Accrued other 78,331 55,623 Total accounts payable and accrued expenses $ 719,257 $ 581,739 __________________________ (1) Includes income taxes payable of $56.4 million and $44.0 million , respectively, as of December 31, 2017 and 2016 . Other Current Liabilities Other current liabilities consisted of the following as of December 31 (in thousands): 2017 2016 Deferred installation revenue $ 74,452 $ 61,399 Customer deposits 16,598 13,894 Derivative instruments 34,466 10,819 Deferred recurring revenue 12,848 18,704 Deferred rent 6,546 4,158 Dividends payable 11,181 11,999 Asset retirement obligations 1,716 10,036 Other current liabilities 2,107 2,131 Total other current liabilities $ 159,914 $ 133,140 Other Liabilities Other liabilities consisted of the following as of December 31 (in thousands): 2017 2016 Asset retirement obligations $ 96,823 $ 92,979 Deferred tax liabilities, net 252,287 274,341 Deferred installation revenue 117,021 96,744 Deferred rent 97,782 76,566 Accrued taxes 64,378 56,208 Dividends payable 6,669 8,495 Customer deposits 10,849 4,773 Deferred recurring revenue 4,236 2,681 Derivative instruments 6,381 140 Other liabilities 5,284 10,321 Total other liabilities $ 661,710 $ 623,248 The following table summarizes the activities of the Company’s asset retirement obligation ("ARO") (in thousands): Asset retirement obligations as of December 31, 2014 $ 64,858 Additions 17,337 Adjustments (1) (4,676 ) Accretion expense 3,349 Impact of foreign currency exchange (2,386 ) Asset retirement obligations as of December 31, 2015 78,482 Additions 22,955 Adjustments (1) (2,366 ) Accretion expense 6,685 Impact of foreign currency exchange (2,741 ) Asset retirement obligations as of December 31, 2016 103,015 Additions 17,736 Adjustments (1) (34,576 ) Accretion expense 7,335 Impact of foreign currency exchange 5,029 Asset retirement obligations as of December 31, 2017 $ 98,539 __________________________ (1) The ARO adjustments are primarily due to lease amendments, acquisition of real estate assets and other adjustments.

Derivatives and Hedging Instrum

Derivatives and Hedging Instruments	12 Months Ended
	Dec. 31, 2017
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivatives and Hedging Instruments	Derivatives and Hedging Instruments Derivatives Designated as Hedging Instruments Net Investment Hedges. The Company is exposed to the impact of foreign exchange rate fluctuations on its investments in foreign subsidiaries whose functional currencies are other than the U.S. dollar. In order to mitigate the impact of foreign currency exchange rates, the Company has entered into various foreign currency loans which are designated as hedges against the Company's net investment in foreign subsidiaries. As of December 31, 2017 and 2016 , the total principal amount of foreign currency loans, which were designated as net investment hedges, was $3,149.5 million and $646.2 million , respectively. In March 2016, the Company began using foreign exchange forward contracts to hedge against the effect of foreign exchange rate fluctuations on a portion of its net investment in the foreign subsidiaries. For a net investment hedge, changes in the fair value of the hedging instrument designated as a net investment hedge, except the ineffective portion and forward points, are recorded as a component of other comprehensive income in the consolidated balance sheet. The Company recorded net foreign exchange losses of $235.3 million and net foreign exchanges gains of $85.5 million in other comprehensive income (loss) for the years ended December 31, 2017 and 2016 , respectively. For the year ended December 31, 2016 , the Company reclassified net foreign exchange gains of $40.0 million to gain on sale of discontinued operations. The Company recorded no ineffectiveness from its net investment hedges for the years ended December 31, 2017 and 2016 . Cash Flow Hedges. The Company hedges its foreign currency translation exposure for forecasted revenues and expenses in its EMEA region between the U.S. dollar and the British Pound, Euro, Swedish Krona and Swiss Franc. The foreign currency forward and option contracts that the Company uses from time to time to hedge this exposure are designated as cash flow hedges under the accounting standard for derivatives and hedging. The Company also uses purchased collar options to manage a portion of its exposure to foreign currency exchange rate fluctuations, where the Company writes a foreign currency call option and purchases a foreign currency put option. When two or more derivative instruments in combination are jointly designated as a cash flow hedging instrument, they are treated as a single instrument. Effective January 1, 2015, the Company began to enter into intercompany hedging instruments ("intercompany derivatives") with a wholly-owned subsidiary of the Company in order to hedge certain forecasted revenues and expenses denominated in currencies other than the U.S. dollar. Simultaneously, the Company enters into derivative contracts with unrelated third parties to externally hedge the net exposure created by such intercompany derivatives. The following disclosure is prepared on a consolidated basis. Assets and liabilities resulting from intercompany derivatives have been eliminated in consolidation. As of December 31, 2017 , the Company's cash flow hedge instruments had maturity dates ranging from January 2018 to October 2019 as f ollows (in thousands): Notional Amount Fair Value (1) Accumulated Other Comprehensive Income (Loss) (2)(3) Derivative assets $ 72,262 $ 2,379 $ 2,055 Derivative liabilities 440,637 (29,777 ) (34,311 ) $ 512,899 $ (27,398 ) $ (32,256 ) __________________________ (1) All derivative assets related to cash flow hedges are included in the consolidated balance sheets within other current assets, other assets, other current liabilities and other liabilities. (2) Included in the consolidated balance sheets within accumulated other comprehensive income (loss). (3) The Company recorded a net loss of $26.7 million within accumulated other comprehensive income (loss) relating to cash flow hedges that will be reclassified to revenue and expenses as they mature over the next 12 months. As of December 31, 2016 , the Company's cash flow hedge instruments had maturity dates ranging from January 2017 to November 2018 as follows (in thousands): Notional Amount Fair Value (1) Accumulated Other Comprehensive Income (Loss) (2)(3) Derivative assets $ 545,638 $ 44,570 $ 42,634 Derivative liabilities 42,207 (1,815 ) (1,453 ) $ 587,845 $ 42,755 $ 41,181 __________________________ (1) All derivative assets related to cash flow hedges are included in the consolidated balance sheets within other current assets, other assets, other current liabilities and other liabilities. (2) Included in the consolidated balance sheets within accumulated other comprehensive income (loss). (3) The Company recorded a net gain of $31.9 million within accumulated other comprehensive income (loss) relating to cash flow hedges that will be reclassified to revenue and expenses as they mature over the next 12 months. During the year ended December 31, 2017 , the amount of net gains from the ineffective and excluded portions of cash flow hedges recognized in other income (expense) was $3.8 million . During the year ended December 31, 2016 , the amount of net gains from the ineffective and excluded portions of cash flow hedges recognized in other income (expense) were not significant. During the year ended December 31, 2017 , the amount of net gains reclassified from accumulated other comprehensive income (loss) to revenues was $20.8 million and the amount of net losses reclassified from accumulated other comprehensive income (loss) to operating expenses were $11.2 million . During the year ended December 31, 2016 , the amount of net gains reclassified from accumulated other comprehensive income (loss) to revenues was $38.4 million and the amount of net losses reclassified from accumulated other comprehensive income (loss) to operating expenses was $19.9 million . During the year ended December 31, 2015 , the amount of net gains reclassified from accumulated other comprehensive income (loss) to revenues was $28.0 million and the amount of net losses reclassified from accumulated other comprehensive income (loss) to operating expenses was $6.3 million . Derivatives Not Designated as Hedging Instruments Embedded Derivatives . The Company is deemed to have foreign currency forward contracts embedded in certain of the Company’s customer agreements that are priced in currencies different from the functional or local currencies of the parties involved. These embedded derivatives are separated from their host contracts and carried on the Company’s balance sheet at their fair value. The majority of these embedded derivatives arise as a result of the Company’s foreign subsidiaries pricing their customer contracts in the U.S. dollar. Gains and losses on these embedded derivatives are included within revenues in the Company’s consolidated statements of operations. The company recognized a net loss of $6.8 million during the year ended December 31, 2017 . During the years ended December 31, 2016 and 2015 , the gain or loss associated with these embedded derivatives was not significant. Economic Hedges of Embedded Derivatives. The Company uses foreign currency forward contracts to help manage the foreign exchange risk associated with the Company’s customer agreements that are priced in currencies different from the functional or local currencies of the parties involved ("economic hedges of embedded derivatives"). Foreign currency forward contracts represent agreements to exchange the currency of one country for the currency of another country at an agreed-upon price on an agreed-upon settlement date. Gains and losses on these contracts are included in revenues along with gains and losses of the related embedded derivatives. The Company entered into various economic hedges of embedded derivatives during the years ended December 31, 2017 , 2016 and 2015 . During the year ended December 31, 2017 , the gain or loss associated with these economic hedges of embedded derivatives was not significant. The Company recognized a net gain of $2.9 million and a net loss of $2.3 million during the years ended December 31, 2016 and 2015 , respectively. Foreign Currency Forward and Option Contracts. The Company also uses foreign currency forward and option contracts to manage the foreign exchange risk associated with certain foreign currency-denominated assets and liabilities. As a result of foreign currency fluctuations, the U.S. dollar equivalent values of its foreign currency-denominated assets and liabilities change. Gains and losses on these contracts are included in other income (expense), on a net basis, along with the foreign currency gains and losses of the related foreign currency-denominated assets and liabilities associated with these foreign currency forward contracts. The Company entered into various foreign currency forward and option contracts during the years ended December 31, 2017 , 2016 and 2015 . The Company recognized a net loss of $69.0 million during the year ended December 31, 2017 , a net gain of $74.2 million during the year ended December 31, 2016 and a net loss of $24.3 million during the year ended December 31, 2015 . Offsetting Derivative Assets and Liabilities The following table presents the fair value of derivative instruments recognized in the Company’s consolidated balance sheets as of December 31, 2017 (in thousands): Gross Amounts Gross Amounts Offset in the Consolidated Balance Sheet Net Consolidated Balance Sheet Amounts (1) Gross Amounts not Offset in the Consolidated Balance Sheet (2) Net Assets: Designated as hedging instruments: Foreign currency forward contracts designated as cash flow hedges $ 2,379 $ — $ 2,379 $ (2,379 ) $ — Not designated as hedging instruments: Embedded derivatives 5,076 — 5,076 — 5,076 Economic hedges of embedded derivatives 325 — 325 — 325 Foreign currency forward contracts 505 — 505 (340 ) 165 5,906 — 5,906 (340 ) 5,566 Additional netting benefit — — — (490 ) (490 ) $ 8,285 $ — $ 8,285 $ (3,209 ) $ 5,076 Liabilities: Designated as hedging instruments: Foreign currency forward contracts designated as cash flow hedges $ 29,777 $ — $ 29,777 $ (2,379 ) $ 27,398 Not designated as hedging instruments: Embedded derivatives 3,503 — 3,503 — 3,503 Economic hedges of embedded derivatives 20 — 20 — 20 Foreign currency forward contracts 7,547 — 7,547 (340 ) 7,207 11,070 — 11,070 (340 ) 10,730 Additional netting benefit — — — (490 ) (490 ) $ 40,847 $ — $ 40,847 $ (3,209 ) $ 37,638 _______________________ (1) As presented in the Company’s consolidated balance sheets within other current assets, other assets, other current liabilities and other liabilities. (2) The Company enters into master netting agreements with its counterparties for transactions other than embedded derivatives to mitigate credit risk exposure to any single counterparty. Master netting agreements allow for individual derivative contracts with a single counterparty to offset in the event of default. For presentation on the consolidated balance sheets, the Company does not offset fair value amounts recognized for derivative instruments under master netting arrangements. The following table presents the fair value of derivative instruments recognized in the Company’s consolidated balance sheets as of December 31, 2016 (in thousands): Gross Amounts Gross Amounts Offset in the Consolidated Balance Sheet Net Consolidated Balance Sheet Amounts (1) Gross Amounts not Offset in the Consolidated Balance Sheet (2) Net Assets: Designated as hedging instruments: Cash flow hedges Foreign currency forward and option contracts $ 44,570 $ — $ 44,570 $ (1,815 ) $ 42,755 Net investment hedges Foreign currency forward contracts 6,930 — 6,930 (3,310 ) 3,620 51,500 — 51,500 (5,125 ) 46,375 Not designated as hedging instruments: Embedded derivatives 9,745 — 9,745 — 9,745 Foreign currency forward contracts 8,734 — 8,734 (1,873 ) 6,861 18,479 — 18,479 (1,873 ) 16,606 Additional netting benefit — — — (2,436 ) (2,436 ) $ 69,979 $ — $ 69,979 $ (9,434 ) $ 60,545 Liabilities: Designated as hedging instruments: Cash flow hedges Foreign currency forward and option contracts $ 1,815 $ — $ 1,815 $ (1,815 ) $ — Net investment hedges Foreign currency forward contracts 3,525 — 3,525 (3,310 ) 215 5,340 — 5,340 (5,125 ) 215 Not designated as hedging instruments: Embedded derivatives 1,525 — 1,525 — 1,525 Economic hedges of embedded derivatives 866 — 866 — 866 Foreign currency forward contracts 3,228 — 3,228 (1,873 ) 1,355 5,619 — 5,619 (1,873 ) 3,746 Additional netting benefit — — — (2,436 ) (2,436 ) $ 10,959 $ — $ 10,959 $ (9,434 ) $ 1,525 _________________________ (1) As presented in the Company’s consolidated balance sheets within other current assets, other assets, other current liabilities and other liabilities. (2) The Company enters into master netting agreements with its counterparties for transactions other than embedded derivatives to mitigate credit risk exposure to any single counterparty. Master netting agreements allow for individual derivative contracts with a single counterparty to offset in the event of default. For presentation on the consolidated balance sheets, the Company does not offset fair value amounts recognized for derivative instruments under master netting arrangements.

Fair Value Measurements

Fair Value Measurements	12 Months Ended
	Dec. 31, 2017
Fair Value Disclosures [Abstract]
Fair Value Measurements	Fair Value Measurements Valuation Methods Fair value estimates are made as of a specific point in time based on methods using the market approach valuation method which uses prices and other relevant information generated by market transactions involving identical or comparable assets or liabilities or other valuation techniques. These techniques involve uncertainties and are affected by the assumptions used and the judgments made regarding risk characteristics of various financial instruments, discount rates, estimates of future cash flows, future expected loss experience and other factors. Cash, Cash Equivalents and Investments. The fair value of the Company's investments in money market funds approximates their face value. Such instruments are included in cash equivalents. The Company’s money market funds and publicly traded equity securities are classified within Level 1 of the fair value hierarchy because they are valued using quoted prices for identical instruments in active markets. The fair value of the Company's other investments, including certificates of deposit, approximates their face value. The fair value of these investments is priced based on the quoted market price for similar instruments or nonbinding market prices that are corroborated by observable market data. Such instruments are classified within Level 2 of the fair value hierarchy. The Company determines the fair values of its Level 2 investments by using inputs such as actual trade data, benchmark yields, broker/dealer quotes, and other similar data, which are obtained from quoted market prices, custody bank, third-party pricing vendors, or other sources. The Company uses such pricing data as the primary input to make its assessments and determinations as to the ultimate valuation of its investment portfolio and has not made, during the periods presented, any material adjustments to such inputs. The Company is responsible for its consolidated financial statements and underlying estimates. The Company uses the specific identification method in computing realized gains and losses. Realized gains and losses on the investments are included within other income (expense) in the Company’s consolidated statements of operations. Short-term and long-term investments are classified as available-for-sale and are carried at fair value with unrealized gains and losses reported in stockholders’ equity as a component of other comprehensive income or loss, net of any related tax effect. The Company reviews its investment portfolio quarterly to determine if any securities may be other-than-temporarily impaired due to increased credit risk, changes in industry or sector of a certain instrument over an extended period of time. Derivative Assets and Liabilities . For derivatives, the Company uses forward contract and option models employing market observable inputs, such as spot currency rates and forward points with adjustments made to these values utilizing published credit default swap rates of its foreign exchange trading counterparties and other comparable companies. The Company has determined that the inputs used to value its derivatives fall within Level 2 of the fair value hierarchy, therefore the derivatives are categorized as Level 2. During the years ended December 31, 2017 and 2016 , the Company did not have any nonfinancial assets or liabilities measured at fair value on a recurring basis. The Company’s financial assets and liabilities measured at fair value on a recurring basis as of December 31, 2017 were as follows (in thousands): Fair Value at December 31, Fair Value Measurement Using 2017 Level 1 Level 2 Assets: Cash $ 985,382 $ 985,382 $ — Money market and deposit accounts 427,135 427,135 — Publicly traded equity securities 6,163 6,163 — Certificates of deposit 31,351 — 31,351 Derivative instruments (1) 8,285 — 8,285 $ 1,458,316 $ 1,418,680 $ 39,636 Liabilities: Derivative instruments (1) $ 40,847 $ — $ 40,847 _________________________ (1) Includes both foreign currency embedded derivatives and foreign currency forward and option contracts. Amounts are included within other current assets, other assets, other current liabilities and other liabilities in the Company’s consolidated balance sheet. The Company’s financial assets and liabilities measured at fair value on a recurring basis at December 31, 2016 were as follows (in thousands): Fair Value at December 31, Fair Value Measurement Using 2016 Level 1 Level 2 Assets: Cash $ 345,119 $ 345,119 $ — Money market and deposit accounts 400,388 400,388 — Publicly traded equity securities 6,463 6,463 — Certificates of deposit 9,957 — 9,957 Derivative instruments (1) 69,979 — 69,979 $ 831,906 $ 751,970 $ 79,936 Liabilities: Derivative instruments (1) $ 10,959 $ — $ 10,959 _________________________ (1) Includes embedded derivatives, foreign currency embedded derivatives and foreign currency forward contracts. Amounts are included within other current assets, other assets, other current liabilities and other liabilities in the Company’s consolidated balance sheet. The Company did not have any Level 3 financial assets or financial liabilities during the years ended December 31, 2017 and 2016 .

Leases

Leases	12 Months Ended
	Dec. 31, 2017
Leases [Abstract]
Leases	Leases Capital Lease and Other Financing Obligations The Company’s capital lease and other financing obligations expire at various dates ranging from 2018 to 2053 . The weighted average effective interest rate of the Company’s capital lease and other financing obligations was 7.86% as of December 31, 2017 . The Company’s capital lease and other financing obligations are summarized as follows as of December 31, 2017 (in thousands): Capital Lease Obligations Other Financing Obligations Total 2018 $ 100,815 $ 101,095 $ 201,910 2019 94,234 88,028 182,262 2020 94,327 87,758 182,085 2021 92,455 89,595 182,050 2022 92,309 90,070 182,379 Thereafter 801,237 886,277 1,687,514 Total minimum lease payments 1,275,377 1,342,823 2,618,200 Plus amount representing residual property value — 545,656 545,656 Less amount representing interest (531,820 ) (933,075 ) (1,464,895 ) Present value of net minimum lease payments 743,557 955,404 1,698,961 Less current portion (41,117 ) (37,588 ) (78,705 ) $ 702,440 $ 917,816 $ 1,620,256 Amsterdam 5 ("AM5") Data Center In May 2017, the Company acquired the land and building for the AM5 IBX data center for cash consideration of €26.7 million or $30.4 million at the exchange rate in effect on June 30, 2017. The Company had previously accounted for the construction and related agreements as a build-to-suit arrangement. As a result of the purchase, the prior arrangement was effectively terminated and the financing obligation was settled in full. The Company settled the financing obligation of the AM5 data center for €20.0 million or approximately $22.8 million and recognized a loss on debt extinguishment of €7.2 million or approximately $8.2 million . The fair value allocated to the ground lease was €6.7 million or $7.6 million , which was recorded as other assets and will be amortized through December 2054. Hong Kong 5 ("HK5") Data Center In January 2017, the Company entered into an agreement for certain elements of the construction of the HK5 Data Center. The terms of the construction agreement triggered the Company to be, in substance, the owner of the asset during the construction phase. The Company has accounted for the construction and related agreements as a build-to-suit arrangement. As of December 31, 2017, the Company recorded a financing obligation totaling approximately 577.4 million Hong Kong dollars, or $73.9 million at the exchange rate in effect as of December 31, 2017. Operating Leases The Company also leases its IBX data centers and certain equipment under noncancelable operating lease agreements. The majority of the Company’s operating leases for its land and IBX data centers expire at various dates through 2065 with renewal options available to the Company. The lease agreements typically provide for base rental rates that increase at defined intervals during the term of the lease. In addition, the Company has negotiated some rent expense abatement periods for certain leases to better match the phased build out of its IBX data centers. The Company accounts for such abatements and increasing base rentals using the straight-line method over the life of the lease. The difference between the straight-line expense and the cash payment is recorded as deferred rent (see Note 6, "Other Current Liabilities" and "Other Liabilities"). Minimum future operating lease payments as of December 31, 2017 are summarized as follows (in thousands): Years ending: 2018 $ 176,789 2019 164,711 2020 154,329 2021 144,706 2022 140,451 Thereafter 1,132,964 Total $ 1,913,950 Total rent expense was approximately $157.9 million , $140.6 million and $101.5 million for the years ended December 31, 2017 , 2016 and 2015 , respectively.

Debt Facilities

Debt Facilities	12 Months Ended
	Dec. 31, 2017
Debt Disclosure [Abstract]
Debt Facilities	Debt Facilities Mortgage and Loans Payable The Company’s mortgage and loans payable consisted of the following as of December 31 (in thousands): 2017 2016 Term loans $ 1,417,352 $ 1,413,582 Mortgage payable and other loans payable 48,872 44,382 1,466,224 1,457,964 Less the amount representing debt discount and debt issuance cost (10,666 ) (22,811 ) Add the amount representing mortgage premium 2,051 1,862 1,457,609 1,437,015 Less current portion (64,491 ) (67,928 ) $ 1,393,118 $ 1,369,087 Senior Credit Facility On December 12, 2017, the Company entered into a credit agreement with a group of lenders for a $3,000.0 million credit facility ("Senior Credit Facility"), comprised of a $2,000.0 million senior unsecured multicurrency revolving credit facility ("Revolving Facility") and an approximately $1,000.0 million senior unsecured multicurrency term loan facility ("Term Loan Facility"). The Senior Credit Facility contains customary covenants, including financial covenants which require the Company to maintain certain financial coverage and leverage ratios, as well as customary events of default, and is guaranteed by certain of the Company’s domestic subsidiaries. The Senior Credit Facility has a five -year term, maturing on December 12, 2022. The Company borrowed £500.0 million and SEK 2,800.0 million under the Term Loan Facility on December 12, 2017, or approximately $ 997.1 million at the exchange rates in effect on that date. The Company is required to repay the Term Loan Facility at the rate of 5% of the original principle amount per annum with the remaining balance to be repaid in full at the maturity of the Senior Credit Facility. The Term Loan Facility bears interest at a rate based on LIBOR plus a margin that can vary from 1.00% to 1.70% . The Revolving Credit Facility allows the Company to borrow, repay and reborrow over its term. The Revolving Credit Facility provides a sublimit for the issuance of letters of credit of up to $250.0 million at any one time. Borrowings under the Revolving Credit Facility bear interest at a rate based on LIBOR plus a margin that can vary from 0.85% to 1.40% or, at the Company’s option, the base rate, which is defined as the highest of (a) the Federal Funds Rate plus 0.5% , (b) the Bank of America prime rate and (c) one-month LIBOR plus 1% plus a margin that can vary from 0.0% to 0.4% . The Company is required to pay a quarterly letter of credit fee on the face amount of each letter of credit, which fee is based on the same margin that applies from time to time to LIBOR-indexed borrowings under the revolving credit line. The Company is also required to pay a quarterly facility fee ranging from 0.15% to 0.30% per annum based on the total revolving credit facility amount. Outstanding Borrowings As of December 31, 2017 , the Company had £500.0 million and SEK2,800.0 million , or approximately $1,017.8 million in U.S dollars at exchange rates in effect as of December 31, 2017 , outstanding under the Term Loan Facility with a weighted average effective interest rate of 1.85% per annum. Debt issuance costs related to the Term Loan Facility, net of amortization, were $3.2 million as of December 31, 2017 . 2014 Senior Credit Facility On December 17, 2014, the Company entered into a credit agreement with a group of lenders for a $1,500.0 million credit facility ("2014 Senior Credit Facility"), comprised of a $1,000.0 million multicurrency revolving credit facility ("2014 Revolving Credit Facility") and a $500.0 million multicurrency term loan facility ("2014 Term Loan A Facility"). The 2014 Revolving Credit Facility allowed the Company to borrow, repay and reborrow over the term. The 2014 Revolving Credit Facility provided a sublimit for the issuance of letters of credit of up to $150.0 million at any one time. Borrowings under the 2014 Revolving Credit Facility bore interest at a rate based on LIBOR plus a margin that could vary from 1.0% to 1.4% . The Company paid a quarterly letter of credit fee on the face amount of each letter of credit, which fee was based on the same margin that applies from time to time to LIBOR-indexed borrowings under the revolving credit line . The Company also paid a quarterly facility fee ranging from 0.25% to 0.35% per annum of the revolving credit facility, regardless of the amount utilized. First Amendment On April 30, 2015, the Company entered into the first amendment (the "First Amendment") to the 2014 Senior Credit Facility. The First Amendment provided for the conversion of the outstanding U.S. dollar-denominated borrowings under the 2014 Term Loan A Facility into an approximately equivalent amount denominated in four foreign currencies. In connection with the execution of the First Amendment, on April 30, 2015 the Company repaid the U.S. dollar-denominated $490.0 million remaining principal balance of the Term Loan A Facility and immediately reborrowed under the 2014 Term Loan A Facility in the aggregate principal amounts of CHF 47.8 million , €184.9 million , £92.6 million and ¥11,924.0 million , or approximately $490.0 million in U.S. dollars at exchange rates in effect on April 30, 2015. The Company accounted for this transaction as a debt modification. The Company repaid the foreign-currency denominated borrowings under the 2014 Term Loan A Facility in equal quarterly installments on the last business day of each March, June, September and December, commencing on June 30, 2015, equal to the amount of 2.00% of the result of the respective 2014 Term Loan A Facility on April 30, 2015 divided by 0.98 with the remaining principal amount to be paid on the maturity date of the Term Loan A Facility. Second Amendment On December 8, 2015, the Company entered into the second amendment (the "Second Amendment") to the 2014 Senior Credit Facility. Pursuant to the Second Amendment, the 2014 Revolving Credit Facility was increased from $1,000.0 million to $1,500.0 million and the Company received commitments from the lenders for a $250.0 million seven year term loan (the "USD Term Loan B Commitment") and for a £300.0 million , or approximately $442.0 million in U.S. dollars at the exchange rate in effect on December 31, 2015, seven year term loan (the "Sterling Term Loan B Commitment", and collectively, the "Term Loan B Commitments"). On January 8, 2016, the Company borrowed the full amount of the $250.0 million and £300.0 million under the Term Loan B Commitment. Funding of the Term Loan B was net of the original issue discounts of 0.25% of the principal of the USD Term Loan B and 0.50% of the principal of the Sterling Term Loan B. Loans made under the Term Loan B Commitments (the "Term Loan B") were repaid in equal quarterly installments of 0.25% of the original principal, with the remaining amount outstanding to be repaid in full on the seventh anniversary of the funding date of the Term Loan B. The USD Term Loan B bore interest at a rate based on LIBOR plus a margin of 3.25% and the Sterling Term Loan B bore interest at a rate based on LIBOR plus a margin of 3.75% . Third Amendment On December 22, 2016, the Company, entered into the third amendment (the "Third Amendment") to the 2014 Senior Credit Facility. Pursuant to the Third Amendment, (i) the Company may borrow up to €1,000.0 million in additional term B loan (the "Term B-2 Loan"), (ii) the interest rate margin applicable to the existing Term Loan B (the "Term Loan B Facility") in US Dollars was reduced from 3.25% to 2.50% and the LIBOR floor applicable to such loans were reduced from 0.75% to zero and (iii) the interest rate margin applicable to the loans borrowed under the Term Loan B Facility in Pounds Sterling was reduced from 3.75% to 3.00% , with no change to the existing LIBOR floor of 0.75% applicable to such loans. The Company accounted for this transaction as a debt modification. On January 6, 2017, the Company borrowed the full amount of the Term B-2 Loan for €1,000.0 million , or approximately $1,059.8 million in U.S dollars at the exchange rate in effect on January 6, 2017. The Term B-2 Loan bore interest at an index rate based on LIBOR plus a margin of 3.25% . No original issue discount is applicable to the Term B-2 Loan. The Term B-2 Loan was repaid in equal quarterly installments of 0.25% of the original principal amount starting in the second quarter of 2017, with the remaining amount outstanding to be repaid in full on the seventh anniversary of the funding date of the Term B-2 Loan. Fourth Amendment On August 15, 2017, the Company entered into the fourth amendment (the "Fourth Amendment") to the 2014 Senior Credit Facility. Pursuant to the Fourth Amendment, (a) the interest rate margin applicable to loans borrowed under the Term Loan B Facility in US Dollars (the "USD Term Loan B Loans") was reduced from 2.50% to 2.00% , (b) the LIBOR floor applicable to loans borrowed under the Term Loan B Facility in Pounds Sterling (the "GBP Term Loan B Loans") was reduced from 0.75% to zero and (c) the interest rate margin applicable to loans borrowed under the Term Loan B Facility in Euro was reduced from 3.25% to 2.50% . On December 12, 2017, using the proceeds from the sale of 2.875% Euro Senior Notes due 2026 and amounts borrowed under the Term Loan Facility, the Company repaid in full amounts outstanding under the 2014 Term Loan A Facility, the Term B Loans and the Term B-2 Loan, and terminated the 2014 Senior Credit Facility. Bridge Term Loan In connection with its acquisition of Bit-isle, on September 30, 2015, the Company entered into a term loan agreement (the “Bridge Term Loan Agreement”) with the Bank of Tokyo-Mitsubishi UFJ, Ltd. (“BTMU”). Pursuant to the Bridge Term Loan Agreement, BTMU has committed to provide a senior bridge loan facility (the “Bridge Term Loan”) in the amount of up to ¥47,500.0 million , or approximately $395.2 million in U.S dollars at the exchange rate in effect on December 31, 2015. Proceeds from the Bridge Term Loan were used exclusively for the acquisition of Bit-isle, the repayment of Bit-isle’s existing debt and transaction costs incurred in connection with the closing of the Bridge Term Loan and the acquisition of Bit-isle. Borrowings under the Bridge Term Loan bore interest at the Tokyo Interbank Offered Rate for Japanese Yen, plus a margin of 0.4% per annum for the first ten months following the first draw down. Thereafter, the margin increased to 1.75% per annum. The Company repaid the Bridge Term Loan in full at the end of its term on October 31, 2016. Japanese Yen Term Loan On September 30, 2016, the Company entered into a five year term loan agreement (the "Japanese Yen Term Loan") with BTMU for ¥47,500.0 million , or approximately $468.4 million at the exchange rate in effect on September 30, 2016. Loans made under the Japanese Yen Term Loan must be repaid in equal quarterly installments of ¥625.0 million , with the remaining balance of ¥35,625.0 million to be repaid in full on October 29, 2021. Borrowings under the Japanese Yen Term Loan bear interest at the Tokyo Interbank Offered Rate for Japanese Yen, plus a margin of 1.5% per annum. In October 2016, the Company drew down the full amount of the Japanese Yen Term Loan of ¥47,500.0 million , or approximately $453.2 million at the exchange rate in effect on October 31, 2016, and repaid the one-year Bridge Term Loan agreement which was used to facilitate the acquisition of Bit-isle. Total outstanding borrowings under the Japanese Yen Term Loan were ¥45,000.0 million , or approximately $399.6 million in U.S dollars at the exchange rate in effect as of December 31, 2017 . As of December 31, 2017, debt issuance cost, net of amortization, related to the Japanese Yen Term Loan was ¥843.6 million , or approximately $7.5 million in U.S. dollars at the exchange rate in effect on December 31, 2017 . Brazil Financings In June 2016, the Company prepaid and terminated its 2012 and 2013 Brazil financings. In connection with this prepayment, the Company paid 90.7 million Brazilian Reals, including principal, accrued interest and termination fees, or approximately $28.3 million at the exchange rate in effect as of June 30, 2016. Mortgage Payable In October 2013, as a result of the Frankfurt Kleyer 90 Carrier Hotel Acquisition, the Company assumed a mortgage payable of $42.9 million with an effective interest rate of 4.25% . The mortgage payable has monthly principal and interest payments and has an expiration date of August 2022. Convertible Debt 4.75% Convertible Subordinated Notes In June 2009, the Company issued $373.8 million aggregate principal amount of 4.75% Convertible Subordinated Notes due June 15, 2016 (the "4.75% Convertible Subordinated Notes"). Interest was payable semi-annually on June 15 and December 15 of each year and commenced on December 15, 2009 . In May and June 2014, certain holders of the 4.75% Convertible Subordinated Notes elected to convert a total of $215.8 million of the principal amount of the notes for 2,411,851 shares of the Company’s common stock and $51.7 million in cash, comprised of accrued interest, premium and cash paid in lieu of issuing shares for certain note holders’ principal amount. In December 2015, certain holders of the 4.75% Convertible Subordinated Notes elected to convert a total of $7.8 million of the principal amount of the notes for 101,947 shares of the Company's common stock and approximately $1,000 in cash for residual shares in connection with the conversions. In April and June 2016, holders of the 4.75% convertible subordinated notes converted or redeemed a total of $150.1 million of the principal amount of the notes for 1,981,662 shares of the Company’s common stock and $3.6 million in cash, comprised of accrued interest, cash paid in lieu of fractional shares and principal redemption. In the Company’s consolidated statement of cash flows for the year ended December 31, 2016, the principal redemption and cash paid in lieu of issuing fractional shares to settle a portion of the principal amount were included within net cash provided by (used in) financing activities and the accrued interest paid was included within net cash provided by operating activities. The following table sets forth total interest expense recognized related to the 4.75% Convertible Subordinated Notes for the years ended December 31 (in thousands): 2016 Contractual interest expense $ 3,267 Amortization of debt issuance costs 186 Amortization of debt discount 3,775 $ 7,228 Effective interest rate of the liability component 10.48 % To minimize the impact of potential dilution upon conversion of the 4.75% Convertible Subordinated Notes, the Company entered into capped call transactions (the "Capped Call") separate from the issuance of the 4.75% Convertible Subordinated Notes and paid a premium of $49.7 million for the Capped Call in 2009. The Capped Call covers a total of approximately 4,432,638 shares of the Company’s common stock, subject to adjustment. Upon maturity of the 4.75% Convertible Subordinated Notes on June 15, 2016, the Company settled the capped call transaction and received 380,779 shares of common stock, which were placed in treasury and resulted in a credit of $141.7 million to additional paid in capital at the market price of $372.10 on June 15, 2016. Senior Notes The Company’s senior notes consisted of the following as of December 31 (in thousands): 2017 2016 Amount Effective Rate Amount Effective Rate 4.875% Senior Notes due 2020 $ — — $ 500,000 5.07 % 5.375% Senior Notes due 2022 750,000 5.56 % 750,000 5.56 % 5.375% Senior Notes due 2023 1,000,000 5.51 % 1,000,000 5.51 % 5.75% Senior Notes due 2025 500,000 5.88 % 500,000 5.88 % 2.875% Euro Senior Notes due 2025 1,201,000 3.04 % — — 5.875% Senior Notes due 2026 1,100,000 6.03 % 1,100,000 6.03 % 2.875% Euro Senior Notes due 2026 1,201,000 3.04 % — — 5.375% Senior Notes due 2027 1,250,000 5.51 % — — 7,002,000 3,850,000 Less amount representing debt issuance cost (78,151 ) (39,230 ) $ 6,923,849 $ 3,810,770 2026 Euro Senior Notes In December 2017, the Company issued €1,000.0 million aggregate principal amount of 2.875% senior notes due February 1, 2026, which are referred to as the "2026 Euro Senior Notes". Interest on the notes is payable semi-annually in arrears on February 1 and August 1 of each year, commencing on August 1, 2018. Debt issuance costs related to the 2026 Euro Senior Notes were $15.7 million . As of December 31, 2017, debt issuance costs related to the 2026 Euro Senior Notes, net of amortization, were $15.9 million at the exchange rate in effect on that date. 2025 Euro Senior Notes In September 2017, the Company issued €1,000.0 million aggregate principal amount of 2.875% senior notes due October 1, 2025, which are referred to as the "2025 Euro Senior Notes". Interest on the notes is payable semi-annually in arrears on April 1 and October 1 of each year, commencing on April 1, 2018. Debt issuance costs related to the 2025 Euro Senior Notes were $16.3 million . Debt issuance costs related to the 2025 Euro Senior Notes, net of amortization, were $15.7 million as of December 31, 2017. 2027 Senior Notes In March 2017, the Company issued $1,250.0 million aggregate principal amount of 5.375% senior notes due May 15, 2027, which are referred to as the "2027 Senior Notes". Interest on the notes is payable semi-annually in arrears on May 15 and November 15 of each year, and commenced on May 15, 2017. Debt issuance costs related to the 2027 Senior Notes were $16.8 million . Debt issuance costs related to the 2027 Senior Notes, net of amortization, were $15.6 million as of December 31, 2017. 2026 Senior Notes In December 2015, the Company issued $1,100.0 million aggregate principal amount of 5.875% senior notes due January 15, 2026, which are referred to as the "2026 Senior Notes". Interest on the notes is payable semi-annually in arrears on January 15 and July 15 of each year, and commenced on July 15, 2016. As of December 31, 2017 and 2016 , debt issuance costs related to the 2026 Senior Notes, net of amortization, were $13.4 million and $15.1 million , respectively. 2022 Senior Notes and 2025 Senior Notes In November 2014, the Company issued $750.0 million aggregate principal amount of 5.375% senior notes due January 1, 2022 , and $500.0 million aggregate principal amount of 5.750% senior notes due January 1, 2025 , which are referred to as the "2022 Senior Notes" and "2025 Senior Notes", respectively, and collectively, as the "2022 and 2025 Senior Notes". Interest on each series of the notes is payable semi-annually in arrears on January 1 and July 1 of each year , and commenced on July 1, 2015 . As of December 31, 2017 and 2016 , debt issuance costs related to the 2022 and 2025 Senior Notes, net of amortization, were $10.4 million and $12.5 million , respectively. 2020 Senior Notes and 2023 Senior Notes In March 2013, the Company issued $1,500.0 million aggregate principal amount of senior notes, which consist of $500.0 million aggregate principal amount of 4.875% senior notes due April 1, 2020 (the "2020 Senior Notes") and $1,000.0 million aggregate principal amount of 5.375% senior notes due April 1, 2023 (the "2023 Senior Notes"). Interest on both the 2020 Senior Notes and the 2023 Senior Notes is payable semi-annually on April 1 and October 1 of each year and commenced on October 1, 2013. On September 28, 2017, the Company redeemed the entire $500.0 million principal amount of the 2020 Senior Notes. Debt issuance costs related to the 2023 Senior Notes, net of amortization, were $7.1 million as of December 31, 2017. Debt issuance costs related to the 2020 Senior Notes and 2023 Senior Notes, net of amortization, were $11.6 million as of December 31, 2016. All senior notes are unsecured and rank equal in right of payment to the Company’s existing or future senior indebtedness and senior in right of payment to the Company’s existing and future subordinated indebtedness. The senior notes are effectively subordinated to all of the existing and future secured debt, including debt outstanding under any bank facility or secured by any mortgage, to the extent of the assets securing such debt. They are also structurally subordinated to any existing and future indebtedness and other liabilities (including trade payables) of any of the Company’s subsidiaries. Each series of senior notes is governed by a supplemental indenture between the Company and U.S. Bank National Association, as trustee. These supplemental indentures contain covenants that limit the Company’s ability and the ability of its subsidiaries to, among other things (1) : • incur additional debt; • pay dividends or make other restricted payments; • purchase, redeem or retire capital stock or subordinated debt; • make asset sales; • enter into transactions with affiliates; • incur liens (2) ; • enter into sale-leaseback transactions (2) ; • provide subsidiary guarantees; • make investments; and • merge or consolidate with any other person (2) . (1) If the senior notes are rated investment grade at any time by two or more of Standard & Poor’s, Moody’s and Fitch, most of the restrictive covenants contained in the supplemental indentures will be suspended. (2) The supplemental indenture for the 2.875% Euro Senior Notes due 2026 only contains these covenants footnoted with (2) . Subject to compliance with the limitations described above, the Company may issue an unlimited principal amount of additional notes at later dates under the same indenture as the senior notes. Any additional notes the Company issues under the indenture will be identical in all respects to the terms of the 2.875% Euro Senior Notes due 2026, except that the additional notes will have different issuance dates and may have different issuance prices. The Company is not required to make any mandatory redemption with respect to the senior notes; however, upon the event of a change in control, the Company may be required to offer to purchase the senior notes. Optional Redemption Schedule Senior Note Description Early Equity Redemption Price First Scheduled Redemption Date First Scheduled Redemption Price Second Year Redemption Price Third Year Redemption Price Fourth Year (if scheduled) Redemption Price 5.375% due 2022 105.375% January 1, 2018 104.031% 102.688% 101.344% 100.000% 5.375% due 2023 105.375% April 1, 2018 102.688% 101.792% 100.896% 100.000% 5.75% due 2025 105.750% January 1, 2020 102.875% 101.917% 100.958% 100.000% 2.875% Euro due 2025 102.875% October 1, 2020 101.438% 100.719% 100.000% 5.875% due 2026 105.875% January 15, 2021 102.938% 101.958% 100.979% 100.000% 2.875% Euro due 2026 102.875% February 1, 2021 101.438% 100.719% 100.000% 5.375% due 2027 105.375% May 15, 2022 102.688% 101.792% 100.896% 100.000% Each series of senior notes provides for optional redemption. Within 90 days of the closing of one or more equity offerings and at any time prior to the first scheduled redemption date listed in the Optional Redemption Schedule, the Company may redeem up to 35% of the aggregate principal amount of any series of senior notes outstanding, at the respective early equity redemption price listed in the Optional Redemption Schedule, plus accrued and unpaid interest to the redemption date, provided that at least 65% of the aggregate principal amount of the senior notes issued in such series remains outstanding immediately after such redemption(s). On or after the first scheduled redemption date listed in the Optional Redemption Schedule, the Company may redeem all or a part of a series of senior notes, on one or more occasions, at the redemption prices (expressed as percentages of principal amount) set forth in the Optional Redemption Schedule, plus accrued and unpaid interest thereon, if any, if redeemed during the twelve-month periods beginning on the first scheduled redemption date and at reduced scheduled redemption prices during the twelve-month periods beginning on the anniversaries of the first scheduled redemption date. In addition, at any time prior to the first scheduled redemption date, the Company may redeem all or a part of any series of senior notes at a redemption price equal to 100% of the principal amount of such senior notes redeemed plus the applicable premium (the "Applicable Premium") and accrued and unpaid interest, subject to the rights of the holders of record of such senior notes on the relevant record date to receive interest due on the relevant interest payment date. The Applicable Premium means the greater of: (1) 1.0% of the principal amount of the senior notes; (2) the excess of: (a) the present value at such redemption date of (i) the first scheduled redemption price of the senior notes at the first scheduled redemption date, plus (ii) all required interest payments due on the senior notes through the first scheduled redemption date computed using a discount rate equal to the treasury rate as of such redemption date plus 50 basis points ; over (b) the principal amount of the senior notes. Loss on Debt Extinguishment During the year ended December 31, 2017, the Company recorded $65.8 million of loss on debt extinguishment comprised of (i) $14.6 million of loss on debt extinguishment from the redemption of the 2020 Senior Notes, which included the $12.2 million redemption premium that was paid in cash and $2.4 million related to the write-off of unamortized debt issuance costs, (ii) $13.2 million of loss on debt extinguishment from the redemption of the Term B-2 Loan, (iii) $9.3 million of loss on debt extinguishment as a result of the redemption of the Term B Loans, (iv) $16.7 million loss on debt extinguishment as a result of amendments to leases and financing obligations and (v) $12.0 million of loss on debt extinguishment as a result of the settlement of financing obligations for properties purchased. During the year ended December 31, 2016, the Company recorded $12.3 million of loss on debt extinguishment as a result of (i) the settlement of the financing obligations for Paris 3 IBX data center, (ii) a portion of the lender fees associated with the Japanese Yen Term Loan and (iii) the prepayment and terminations of the 2012 and 2013 Brazil financings. During the year ended December 31, 2015, the Company recorded $0.3 million of loss on debt extinguishment as a result of the conversions of the 4.75% Convertible Subordinated Notes. Maturities of Debt Facilities The following table sets forth maturities of the Company’s debt, including mortgage, loans payable, and senior notes, gross of debt issuance costs and debt discounts, as of December 31, 2017 (in thousands): Years ending: 2018 $ 64,472 2019 77,309 2020 77,237 2021 387,762 2022 1,607,402 Thereafter 6,256,093 $ 8,470,275 Fair Value of Debt Facilities The following table sets forth the estimated fair values of the Company’s mortgage and loans payable and senior notes, including current maturities, as of December 31 (in thousands): 2017 2016 Mortgage and loans payable $ 1,464,877 $ 1,461,954 Senior notes 7,288,673 4,033,985 The fair value of the mortgage and loans payable, which were not publicly traded, was estimated by considering the Company’s credit rating, current rates available to the Company for debt of the same remaining maturities and terms of the debt (level 2). The fair value of the senior notes, which were traded in the public debt market, was based on quoted market prices (level 1). Interest Charges The following table sets forth total interest costs incurred and total interest costs capitalized for the years ended December 31 (in thousands): 2017 2016 2015 Interest expense $ 478,698 $ 392,156 $ 299,055 Interest capitalized 22,625 13,338 10,943 Interest charges incurred $ 501,323 $ 405,494 $ 309,998 Total interest paid, net of capitalized interest, during the years ended December 31, 2017, 2016 and 2015 was $422.2 million , $336.7 million and $226.5 million , respectively.

Stockholders' Equity

Stockholders' Equity	12 Months Ended
	Dec. 31, 2017
Equity [Abstract]
Stockholders' Equity	Stockholders’ Equity The Company’s authorized share capital is 300,000,000 shares of common stock and 100,000,000 shares of preferred stock, of which 25,000,000 is designated Series A, 25,000,000 is designated as Series A-1 and 50,000,000 is undesignated. As of December 31, 2017 and 2016 , the Company had no preferred stock issued and outstanding. Common Stock In August 2017, the Company entered into an equity distribution agreement with RBC Capital Market, LLC, Merrill Lynch, Pierce, Fenner & Smith Incorporated, Citigroup Global Markets Inc. and J.P. Morgan Securities LLC, establishing an "at the market" equity offering program, under which the Company may offer and sell from time to time up to an aggregate of $750.0 million of its common stock in "at the market" transactions (the "ATM Program"). For the year ended December 31, 2017 , the Company sold 763,201 shares under the ATM Program, for approximately $355.1 million , net of payment of commissions to the sales agents and estimated equity offering costs. In March 2017, the Company issued and sold 6,069,444 shares of its common stock in a public offering pursuant to a registration statement and a related prospectus and prospectus supplement, in each case filed with the Securities and Exchange Commission ("SEC"). The shares issued and sold included the full exercise of the underwriters' option to purchase 791,666 additional shares. The Company received net proceeds of approximately $2,126.3 million , after deducting underwriting discounts and commissions and offering expenses of $58.7 million . In April and June 2016, upon the maturity of the Company's 4.75% Convertible Subordinated Notes, holders of the Company's 4.75% Convertible Subordinated Notes converted $150.1 million principal amount of the notes into 1,981,662 shares of the Company's common stock. In June 2016, the Company also settled the capped call transaction and received 380,779 shares of common stock, which were placed in treasury and resulted in a credit of $141.7 million to additional paid in capital at the market price of $372.10 on June 15, 2016. See convertible debt in Note 10 for additional information. In December 2015, certain holders of the Company's 4.75% Convertible Subordinated Notes elected to convert a portion of the notes into 101,947 shares of the Company's common stock. See convertible debt in Note 10 for additional information. In November 2015, the Company issued and sold 2,994,792 shares of its common stock in a public offering pursuant to a registration statement and a related prospectus and prospectus supplement, in each case filed with the SEC. The shares issued and sold included the full exercise of the underwriters’ option to purchase 390,625 additional shares. The Company received net proceeds of approximately $829.5 million , after deducting underwriting discounts and commissions of $32.3 million and offering expenses of $0.7 million . As of December 31, 2017 , the Company had reserved the following shares of authorized but unissued shares of common stock for future issuances: Common stock options and restricted stock units 4,499,389 Common stock employee purchase plans 3,265,791 Total 7,765,180 Accumulated Other Comprehensive Loss The components of the Company’s accumulated other comprehensive loss (OCI) consisted of the following as of December 31, 2017 , 2016 and 2015 (in thousands): December 31, 2014 Net December 31, 2015 Net December 31, 2016 Net December 31, 2017 Foreign currency translation adjustment ("CTA") loss $ (336,946 ) $ (186,763 ) $ (523,709 ) $ (507,420 ) $ (1,031,129 ) $ 454,269 $ (576,860 ) Unrealized gain (loss) on cash flow hedges (1) 6,603 4,550 11,153 19,551 30,704 (54,895 ) (24,191 ) Net investment hedge CTA gain (loss) (1) — 4,484 4,484 45,505 49,989 (235,292 ) (185,303 ) Unrealized gain (loss) on available for sale securities (2) (99 ) (40 ) (139 ) 2,249 2,110 14 2,124 Net actuarial loss on defined benefit plans (3) (2,001 ) 1,153 (848 ) 32 (816 ) (143 ) (959 ) $ (332,443 ) $ (176,616 ) $ (509,059 ) $ (440,083 ) $ (949,142 ) $ 163,953 $ (785,189 ) __________________________ (1) Refer to Note 7 for a discussion of the amounts reclassified from accumulated other comprehensive loss to net income (loss). (2) The realized gains and losses reclassified from accumulated other comprehensive loss to net income (loss) as a result of sale of available for sale securities were not significant for the years ended December 31, 2017 , 2016 and 2015. (3) The Company has a defined benefit pension plan covering all employees in one country where such plans are mandated by law. The Company does not have any defined benefit plans in any other countries. The unamortized gain (loss) on defined benefit plans includes gains or losses resulting from a change in the value of either the projected benefit obligation or the plan assets resulting from a change in an actuarial assumption, net of amortization. Changes in foreign currencies can have a significant impact to the Company’s consolidated balance sheets (as evidenced above in the Company’s foreign currency translation gain or loss), as well as its consolidated results of operations, as amounts in foreign currencies are generally translating into more U.S. dollars when the U.S. dollar weakens or less U.S. dollars when the U.S. dollar strengthens. At December 31, 2017 , the U.S. dollar was generally weaker relative to certain of the currencies of the foreign countries in which the Company operates. This overall weakening of the U.S. dollar had an overall positive impact on the Company’s consolidated financial position because the foreign denominations translated into more U.S. dollars as evidenced by the decrease in foreign currency translation loss for the year ended December 31, 2017 compared to the year ended December 31, 2016 as reflected in the above table. In future periods, the volatility of the U.S. dollar as compared to the other currencies in which the Company does business could have a significant impact on its consolidated financial position and results of operations including the amount of revenue that the Company reports in future periods. Treasury Stock During the year ended December 31, 2017, the Company re-issued 6,073 shares of its treasury stock with a total value of $2.6 million related to the settlement of restricted stock units. During the year ended December 31, 2016, the Company re-issued 7,099 shares of its treasury stock with a total value of $2.4 million related to the settlement of restricted stock units. During the year ended December 31, 2015, the Company re-issued 7,348 shares of its treasury stock with a total value of $1.8 million related to the settlement of restricted stock units and 11,784 shares of its treasury stock with a total value of $3.5 million related to the exchange and conversion of the 4.75% Convertible Subordinated Notes (see Note 10). Special Distributions In September 2015, the Company’s Board of Directors declared a special distribution of $627.0 million , or approximately $10.95 per share (the "2015 Special Distribution"), to its common stockholders. The 2015 Special Distribution represents an amount that includes the sum of: (1) foreign earnings and profits repatriated as dividend income in 2015; (2) taxable income in 2015 from depreciation recapture in respect of accounting method changes commenced in the Company’s pre-REIT period; and (3) certain other items of taxable income. The 2015 Special Distribution was paid on November 10, 2015 to the Company’s common stockholders of record as of the close of business on October 8, 2015 . Common stockholders had the option to elect to receive payment of the 2015 Special Distribution in the form of stock or cash. The number of shares distributed was determined based upon common stockholder elections and the average closing price of the Company’s common stock on the three trading days commencing on November 3, 2015 or $297.03 per share. As such, the Company issued 1,688,411 shares of its common stock and paid $125.5 million in connection with the 2015 Special Distribution. Shares issued in connection with the 2015 Special Distribution impact weighted average shares outstanding from the date of issuance, thus impacting the Company’s earnings per share data prospectively from the distribution date. Dividends During the year ended December 31, 2017 , the Company's Board of Directors declared quarterly cash dividends of $2.00 per share on November 1, August 2, April 26, and February 15, 2017, to stockholders of record on November 15, August 23, May 24, and February 27, 2017, respectively, and payment dates of December 13, September 20, June 21, and March 22, 2017, respectively. The Company paid a total of $612.1 million in cash dividends during the year ended December 31, 2017. During the year ended December 31, 2016, the Company's Board of Directors declared quarterly cash dividends of $1.75 per share on November 2, August 3, May 4, and February 18, 2016, to stockholders of record on November 16, August 24, May 25, and March 9, 2016, respectively, and payment dates of December 14, September 14, June 15, and March 23, 2016, respectively. The Company paid a total of $492.4 million in cash dividends during the year ended December 31, 2016. During the year ended December 31, 2015, the Company's Board of Directors declared quarterly cash dividends of $1.69 per share on October 28, July 29, May 7 and February 19, 2015, to stockholders of record on December 9, August 26, May 27 and March 11, 2015, respectively, and payment dates of December 16, September 16, June 17 and March 25, 2015, respectively. The Company paid a total of $393.6 million in cash dividends during the year ended December 31, 2015. In addition, as of December 31, 2017 , for dividends and special distributions attributed to the restricted stock units, the Company recorded a short term dividend payable of $11.2 million and a long term dividend payable of $6.7 million for the restricted stock units that have not yet vested. As of December 31, 2016, for dividends and special distributions attributed to the RSU awards, the Company recorded a short term dividend payable of $12.0 million and a long term dividend payable of $8.5 million for the restricted stock units that have not yet vested. For federal income tax purposes, distributions to stockholders are treated as ordinary income, capital gains, return of capital or a combination thereof. For the years ended December 31, 2017 and 2016 , the quarterly dividends were classified as follows: Record Date Payment Date Total Distribution Nonqualified Ordinary Dividend Qualified Ordinary Dividend Return of Capital (per share) Fiscal 2017 2/27/2017 3/22/2017 $ 2.000000 $ 2.000000 $ — $ — 5/24/2017 6/21/2017 2.000000 2.000000 — — 8/23/2017 9/20/2017 2.000000 2.000000 — — 11/15/2017 12/13/2017 2.000000 2.000000 — — Total $ 8.000000 $ 8.000000 $ — $ — Fiscal 2016 3/9/2016 3/23/2016 $ 1.750000 $ 1.231334 $ 0.518666 $ — 5/25/2016 6/15/2016 1.750000 1.231334 0.518666 — 8/24/2016 9/14/2016 1.750000 1.231334 0.518666 — 11/16/2016 12/14/2016 1.750000 1.231334 0.518666 — Total $ 7.000000 $ 4.925336 $ 2.074664 $ —

Stock-Based Compensation

Stock-Based Compensation	12 Months Ended
	Dec. 31, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock-Based Compensation	Stock-Based Compensation Equinix Equity Awards Equity Compensation Plans In May 2000, the Company’s stockholders approved the adoption of the 2000 Equity Incentive Plan as the successor plan to the 1998 Stock Plan. Beginning in August 2000, the Company no longer issued additional grants under the 1998 Stock Plan, and unexercised options under the 1998 Stock Plan that are canceled due to an optionee’s termination may be reissued under the successor 2000 Equity Incentive Plan. Under the 2000 Equity Incentive Plan, nonstatutory stock options, restricted shares, restricted stock units, and stock appreciation rights may be granted to employees, outside directors and consultants at not less than 85% of the fair value on the date of grant, and incentive stock options may be granted to employees at not less than 100% of the fair value on the date of grant. Options granted prior to October 1, 2005 generally expire 10 years from the grant date, and equity awards granted to employees and consultants on or after October 1, 2005 will generally expire 7 years from the grant date, subject to continuous service of the optionee. Equity awards granted under the 2000 Equity Incentive Plan generally vest over 4 years. The Company had reserved a total of 16,636,172 shares for issuance under the 2000 Equity Incentive Plan of which 2,423,051 shares were still available for grant as of December 31, 2017 . The 2000 Equity Incentive Plan is administered by the Compensation Committee of the Board of Directors (the "Compensation Committee"), and the Compensation Committee may terminate or amend the plan, with approval of the stockholders as may be required by applicable law, at any time. In May 2000, the Company’s stockholders approved the adoption of the 2000 Director Option Plan, which was amended and restated effective January 1, 2003. Under the 2000 Director Option Plan, each non-employee board member who was not previously an employee of the Company will receive an automatic initial nonstatutory stock option grant, which vests in four annual installments. In addition, each non-employee board member will receive an annual non-statutory stock option grant on the date of the Company’s regular Annual Meeting of Stockholders, provided the board member will continue to serve as a director thereafter. Such annual option grants shall vest in full on the earlier of a) the first anniversary of the grant, or b) the date of the regular Annual Meeting of Stockholders held in the year following the grant date. A new director who receives an initial option will not receive an annual option in the same calendar year. Options granted under the 2000 Director Option Plan will have an option price not less than 100% of the fair value on the date of grant and will have a 10 -year contractual term, subject to continuous service of the board member. On December 18, 2008, the Company’s Board of Directors passed resolutions eliminating all automatic stock option grant mechanisms under the 2000 Director Option Plan, and replaced them with an automatic restricted stock unit grant mechanism under the 2000 Equity Incentive Plan. The Company had reserved 594,403 shares for issuance under the 2000 Director Option Plan of which 505,646 shares were still available for grant as of December 31, 2017 . The 2000 Director Option Plan is administered by the Compensation Committee and the Compensation Committee may terminate or amend the plan, with approval of the stockholders as may be required by applicable law, at any time. In September 2001, the Company adopted the 2001 Supplemental Stock Plan, under which non-statutory stock options and restricted shares/restricted stock units may be granted to consultants and employees who are not executive officers or board members, at not less than 85% of the fair value on the date of grant. Options granted prior to October 1, 2005 generally expire 10 years from the grant date, and options granted on or after October 1, 2005 will generally expire 7 years from the grant date, subject to continuous service of the optionee. Current stock options granted under the 2001 Supplemental Stock Plan generally vest over four years. The Company had reserved a total of 1,494,275 shares for issuance under the 2001 Supplemental Stock Plan, of which 260,498 shares were still available for grant as of December 31, 2017 . The 2001 Supplemental Stock Plan is administered by the Compensation Committee, and the plan will continue in effect indefinitely unless the Compensation Committee decides to terminate it earlier. The 1998 Stock Plan, 2000 Equity Incentive Plan, 2000 Director Option Plan and 2001 Supplemental Stock Plan are collectively referred to as the "Equity Compensation Plans." Stock Options Stock option activity under the Equity Compensation Plans is summarized as follows: Number of Shares Outstanding Weighted Average Exercise Price per Share Weighted Average Remaining Contractual Life (Years) Aggregate (1) Stock options outstanding at December 31, 2014 77,934 $ 73.84 Stock options exercised (41,889 ) 64.18 Additional shares granted due to special distribution 1,454 — Stock options expired (250 ) 41.12 Stock options outstanding at December 31, 2015 37,249 82.06 Stock options exercised (18,183 ) 80.10 Stock options outstanding at December 31, 2016 19,066 82.01 Stock options exercised (12,763 ) 83.51 Stock options outstanding at December 31, 2017 6,303 $ 78.97 0.57 $ 2,359 Stock options vested and exercisable at December 31, 2017 6,303 $ 78.97 0.57 $ 2,359 __________________________ (1) The aggregate intrinsic value is calculated as the difference between the market value of the stock as of December 31, 2017 and the exercise price of the option. The following table summarizes information about outstanding stock options as of December 31, 2017 : Outstanding Exercisable Range of exercise prices Number of Shares Weighted Average Remaining Contractual Life (Years) Weighted Average Exercise Price Number of Shares Weighted Average Exercise Price $28.56 to $28.56 1,007 1.18 $ 28.56 1,007 $ 28.56 $88.56 to $88.56 5,296 0.45 88.56 5,296 88.56 6,303 0.57 $ 78.97 6,303 $ 78.97 The Company provides the following additional disclosures for stock options as of December 31 (in thousands): 2017 2016 2015 Total aggregate intrinsic value of stock options exercised (1) $ 3,818 $ 4,712 $ 7,198 _________________________ (1) The intrinsic value is calculated as the difference between the market value of the stock on the date of exercise and the exercise price of the option. Restricted Stock Units Since 2008, the Company primarily grants restricted stock units to its employees, including executives and non-employee directors, in lieu of stock options. The Company generally grants restricted stock units that have a service condition only or have both a service and performance condition. Each restricted stock unit is not considered issued and outstanding and does not have voting rights until it is converted into one share of the Company’s common stock upon vesting. Restricted stock unit activity is summarized as follows: Number of Shares Outstanding Weighted Average Grant Date Fair Value per Share Weighted Average Remaining Contractual Life (Years) Aggregate Intrinsic Value (1) (Dollars in Thousands) Restricted stock units outstanding, December 31, 2014 1,403,974 $ 114.56 Restricted stock units granted 711,990 236.89 Additional shares granted due to special distribution 51,432 297.03 Restricted stock units released, vested (623,554 ) 173.79 Special distribution shares released (19,966 ) 227.99 Restricted stock units canceled (103,922 ) 198.67 Special distribution shares canceled (3,516 ) 235.43 Restricted stock units outstanding, December 31, 2015 1,416,438 148.53 Restricted stock units granted 720,601 309.18 Additional shares granted due to special distribution 37 297.03 Restricted stock units released, vested (655,584 ) 213.72 Special distribution shares released (35,354 ) 269.94 Restricted stock units canceled (93,940 ) 242.41 Special distribution shares canceled (4,319 ) 272.84 Restricted stock units outstanding, December 31, 2016 1,347,879 192.59 Restricted stock units granted 658,196 389.60 Restricted stock units released, vested (606,064 ) 260.75 Special distribution shares released (15,667 ) 243.06 Restricted stock units canceled (79,451 ) 313.83 Special distribution shares canceled (1,002 ) 282.49 Restricted stock units outstanding, December 31, 2017 1,303,891 $ 252.30 1.22 $ 590,950 __________________________ (1) The intrinsic value is calculated based on the market value of the stock as of December 31, 2017 . The total fair value of restricted stock units vested and released during the years ended December 31, 2017 , 2016 and 2015 was $259.1 million , $227.4 million and $157.6 million , respectively. Employee Stock Purchase Plan In June 2004, the Company’s stockholders approved the adoption of the 2004 Employee Stock Purchase Plan (the "2004 Purchase Plan") as a successor plan to a previous plan that ceased activity in 2005. A total of 500,000 shares have been reserved for issuance under the 2004 Purchase Plan, and the number of shares available for issuance under the 2004 Purchase Plan automatically increased on January 1 each year, beginning in 2005 and ending in 2014 by the lesser of 2% of the shares of common stock then outstanding or 500,000 shares. Effective November 25, 2014, 3,197 shares were added to the 2004 Purchase Plan, representing an anti-dilutive adjustment pursuant to the 2014 Special Distribution. Effective November 10, 2015, 9,020 shares were added to the 2004 Purchase Plan, representing an anti-dilutive adjustment pursuant to the 2015 Special Distribution. As of December 31, 2017 , a total of 3,265,791 shares remained available for purchase under the 2004 Purchase Plan. The 2004 Purchase Plan permits eligible employees to purchase common stock on favorable terms via payroll deductions of up to 15% of the employee’s cash compensation, subject to certain share and statutory dollar limits. Two overlapping offering periods commence during each calendar year, on each February 15 and August 15 or such other periods or dates as determined by the Compensation Committee from time to time, and the offering periods last up to 24 months with a purchase date every six months. The price of each share purchased is 85% of the lower of a) the fair value per share of common stock on the last trading day before the commencement of the applicable offering period or b) the fair value per share of common stock on the purchase date. The 2004 Purchase Plan is administered by the Compensation Committee of the Board of Directors, and such plan will terminate automatically in June 2024 unless a) the 2004 Purchase Plan is extended by the Board of Directors and b) the extension is approved within 12 months by the Company’s stockholders. The Company provides the following disclosures for the 2004 Purchase Plan as of December 31 (dollars, except shares): 2017 2016 2015 Weighted-average purchase price per share $ 250.65 $ 217.91 $ 150.13 Weighted average grant-date fair value per share of shares purchased $ 72.21 $ 60.49 $ 57.63 Number of shares purchased 162,076 150,044 182,175 The Company uses the Black-Scholes option-pricing model to determine the fair value of shares under the 2004 Purchase Plan with the following assumptions during the years ended December 31: 2017 2016 2015 Range of dividend yield 2.10 - 2.31% 2.38 - 2.53% 2.65 - 2.81% Range of risk-free interest rate 0.70 - 1.35% 0.48 - 0.76% 0.08 - 0.77% Range of expected volatility 16.42 - 24.27% 18.80 - 30.94% 19.96 - 25.78% Weighted-average expected volatility 20.30 % 25.01 % 21.72 % Weighted average expected life (in years) 1.52 1.41 1.59 Stock-Based Compensation Recognized in the Consolidated Statement of Operations The Company generally recognizes stock-based compensation expense on a straight-line basis over the requisite service period of the awards. However, for awards with market conditions or performance conditions, stock-based compensation expense is recognized on a straight-line basis over the requisite service period for each vesting tranche of the award. In October 2014, the Compensation Committee approved amendments to the terms of all outstanding restricted stock units ("RSUs") granted prior to January 1, 2014 to provide for dividend equivalent rights ("DERs") in the event of future dividends paid on the Company’s common stock. The Compensation Committee also approved an adjustment to outstanding stock options, including those under the Company’s Employee Stock Purchase Plan ("ESPP"), to ensure that the cash portion of the 2014 Special Distribution would not negatively impact the intrinsic value of the options. Pursuant to the accounting standard for stock compensation, these actions affecting the terms of the awards are considered modifications for accounting purposes that resulted in incremental stock-based compensation expenses and will be recognized over the requisite service period for each vesting tranche of the award. The total charges associated with this modification are not significant to the financial statements. As of December 31, 2017 , the total stock-based compensation cost related to unvested equity awards not yet recognized, net of estimated forfeitures, totaled $296.7 million which is expected to be recognized over a weighted-average period of 2.08 years. The following table presents, by operating expense, the Company’s stock-based compensation expense recognized in the Company’s consolidated statement of operations for the years ended December 31 (in thousands): 2017 2016 2015 Cost of revenues $ 13,621 $ 13,086 $ 9,878 Sales and marketing 50,094 43,030 36,847 General and administrative 111,785 100,032 86,908 Total $ 175,500 $ 156,148 $ 133,633 The Company’s stock-based compensation recognized in the consolidated statement of operations was comprised of the following types of equity awards for the years ended December 31 (in thousands): 2017 2016 2015 Stock options $ — $ — $ 1,679 Restricted stock units 164,321 145,769 124,512 Employee stock purchase plan 11,179 10,379 7,442 Total $ 175,500 $ 156,148 $ 133,633 During the years ended December 31, 2017 , 2016 and 2015 , the Company capitalized $6.2 million , $4.2 million and $3.0 million , respectively, of stock-based compensation expense as construction in progress in property, plant and equipment.

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes Income (loss) before income taxes is attributable to the following geographic locations for the years ended December 31, (in thousands): 2017 2016 2015 Domestic $ 148,500 $ 215,010 $ 123,153 Foreign 138,332 (55,151 ) 87,845 Income from continuing operations before income taxes $ 286,832 $ 159,859 $ 210,998 The tax benefit (expenses) for income taxes consisted of the following components for the years ended December 31, (in thousands): 2017 2016 2015 Current: Federal $ 9,346 $ (16,365 ) $ (85,352 ) State and local (849 ) (2,147 ) (3,984 ) Foreign (109,032 ) (62,278 ) (27,090 ) Subtotal (100,535 ) (80,790 ) (116,426 ) Deferred: Federal 9,684 (11,184 ) 87,801 State and local 2,018 (3,328 ) 4,600 Foreign 34,983 49,851 801 Subtotal 46,685 35,339 93,202 Provision for income taxes $ (53,850 ) $ (45,451 ) $ (23,224 ) State and foreign taxes not based on income are included in general and administrative expenses and the aggregate amounts were not significant for the years ended December 31, 2017 , 2016 and 2015 . The fiscal 2017 , 2016 and 2015 income tax expense differed from the amounts computed by applying the U.S. federal income tax rate of 35% to pre-tax income as a result of the following for the years ended December 31 (in thousands): 2017 2016 2015 Federal tax at statutory rate $ (100,391 ) $ (55,951 ) $ (73,849 ) State and local tax (expense) benefit 1,000 (4,895 ) 945 Deferred tax assets generated in current year not benefited (7,643 ) (6,246 ) (4,916 ) Foreign income tax rate differential 26,151 22,016 30,387 Non-deductible expenses (2,629 ) (15,828 ) (14,252 ) Stock-based compensation expense (616 ) (5,890 ) (3,922 ) Change in valuation allowance (716 ) 11,995 710 Foreign financing activities 1,319 (26,708 ) 2,592 Loss on debt extinguishment (1,604 ) (8,288 ) — Gain on divestments — 8,828 — Uncertain tax positions reserve (66 ) (9,371 ) (3,191 ) Tax adjustments related to REIT 41,973 45,060 45,823 Enactment of the US tax reform (6,513 ) — — Other, net (4,115 ) (173 ) (3,551 ) Total income tax expense $ (53,850 ) $ (45,451 ) $ (23,224 ) Legislation commonly referred to as the Tax Cuts and Jobs Act ("TCJA"), which was signed into law on December 22, 2017, contains many significant changes to the existing U.S. federal income tax laws. Among other things, the TCJA reduces the U.S. corporate income tax rate from 35% to 21% effective January 1, 2018, limits the tax deductibility of interest expense, accelerates expensing of certain business assets and transitions the U.S. international taxation from a worldwide tax system to a territorial tax system by imposing a one-time mandatory repatriation of undistributed foreign earnings. As a result of the reduced corporate tax rate, the Company recognized an income tax expense of $6.5 million during the fourth quarter of 2017 as a provisional amount due to the remeasurement of the net deferred tax assets in the U.S. TRS. The Company is still analyzing the new tax legislation and assessing the impact. The Company will be able to conclude whether any adjustments are required to its net deferred tax asset balance in the U.S. when it files its 2017 U.S. federal tax return in the fourth quarter of 2018. Any adjustments to these provisional amounts will be reported as a component of tax expense (benefit) in the reporting period when such adjustments are determined. The TCJA mandates a one-time deemed repatriation of undistributed foreign earnings, which will increase the Company’s 2017 taxable income, as well as its required REIT distribution. Based on the interpretation and guidance of the new tax legislation, the Company estimated a provisional amount of $195 million as the one-time mandatory repatriation of its cumulative foreign earnings that was not previously included in the U.S. taxable income. The Company has an option of including the entire amount in its 2017 taxable income or spreading the amount over 8 years in its taxable income. The Company has tentatively determined to include the entire amount in its 2017 taxable income. However, the final decision will be made upon the filing of its 2017 tax return in the fourth quarter of 2018. The Company believes the mandatory repatriation will result in no financial statement impact provided the Company satisfies its REIT distribution requirement. As a result of the Company’s conversion to a REIT effective January 1, 2015, it is no longer the Company’s intent to indefinitely reinvest undistributed foreign earnings. However, no deferred tax liability has been recognized to account for this change because the expected recovery of the basis difference will not result in U.S. taxes in the post-REIT conversion periods due to the fact that none of its foreign subsidiaries is owned by a U.S. taxable REIT subsidiary and the withholding tax effect would be immaterial. As it continues to qualify as a REIT, the Company will not incur U.S. tax liability on the future repatriation of the foreign earnings and profits due to the zero tax rate that will apply provided the Company distributes 100% of its taxable income. During the fourth quarter of 2016, the Company repatriated approximately $63.7 million of foreign earnings from Singapore, which increased the taxable income for 2016 and was included in the REIT distribution for the year. There was no foreign withholding tax triggered by the repatriation. The Company continues to assess the foreign withholding tax impact of its current policy and does not believe the distribution of its foreign earnings would trigger any significant foreign withholding taxes, as a majority of the foreign jurisdictions where the Company operates does not impose withholding taxes on dividend distributions to a corporate U.S. parent. The types of temporary differences that give rise to significant portions of the Company’s deferred tax assets and liabilities are set out below as of December 31 (in thousands): 2017 2016 Deferred tax assets: Reserves and accruals $ 27,673 $ 11,276 Stock-based compensation expense 1,960 1,752 Unrealized losses 10,768 — Operating loss carryforwards 95,864 37,594 Others, net — 5 Gross deferred tax assets 136,265 50,627 Valuation allowance (84,573 ) (29,167 ) Total deferred tax assets, net 51,692 21,460 Deferred tax liabilities: Property, plant and equipment (65,825 ) (57,006 ) Unrealized gains — (7,832 ) Intangible assets (172,123 ) (168,655 ) Total deferred tax liabilities (237,948 ) (233,493 ) Net deferred tax liabilities $ (186,256 ) $ (212,033 ) The tax basis of REIT assets, excluding investments in TRSs, is greater than the amounts reported for such assets in the accompanying consolidated balance sheet by approximately $1,390.1 million at December 31, 2017 . The Company's accounting for deferred taxes involves weighing positive and negative evidence concerning the realizability of the Company's deferred tax assets in each tax jurisdiction. After considering such evidence as the nature, frequency and severity of current and cumulative financial reporting losses, and the sources of future taxable income and tax planning strategies, management concluded that valuation allowances were required in certain foreign jurisdictions. A valuation allowance continues to be provided for the deferred tax assets, net of deferred tax liabilities, associated with the Company's operations in Brazil, Canada, and certain jurisdictions located in the Company’s EMEA and Asia-Pacific regions. The operations in these jurisdictions have a history of significant losses as of December 31, 2017 . As such, management does not believe these operations have established a sustained history of profitability and that a valuation allowance is, therefore, necessary. Changes in the valuation allowance for deferred tax assets for the years ended December 31, 2017 , 2016 and 2015 are as follows (in thousands): 2017 2016 2015 Beginning balance $ 29,167 $ 29,894 $ 27,181 Amounts from acquisitions 25,283 5,053 — Amounts recognized into income 716 (11,995 ) (710 ) Current increase 28,431 6,557 4,513 Impact of foreign currency exchange 976 (342 ) (1,090 ) Ending balance $ 84,573 $ 29,167 $ 29,894 Federal and state tax laws, including California tax laws, impose substantial restrictions on the utilization of NOL and credit carryforwards in the event of an "ownership change" for tax purposes, as defined in Section 382 of the Internal Revenue Code. In 2003, the Company conducted an analysis to determine whether an ownership change had occurred due to significant stock transactions in each of the reporting years disclosed at that time. The analysis indicated that an ownership change occurred during fiscal year 2002, which resulted in an annual limitation of approximately $0.8 million for NOL carryforwards generated prior to 2003. Therefore, the Company substantially reduced its federal and state NOL carryforwards for the periods prior to 2003 to approximately $16.4 million. The Company’s NOL carryforwards for federal, state and foreign tax purposes which expire, if not utilized, at various intervals from 2018, are outlined below (in thousands): Expiration Date Federal (1) State (1) Foreign Total 2018 $ — $ — $ 11,730 $ 11,730 2019 to 2021 190,125 474 16,638 207,237 2022 to 2024 46,827 — 4,294 51,121 2025 to 2027 13,005 — 9,425 22,430 2031 to 2033 — 767 — 767 Thereafter 61,375 18,909 242,382 322,666 $ 311,332 $ 20,150 $ 284,469 $ 615,951 __________________________ (1) The total amount of NOL carryforwards that will not be available to offset the Company’s future taxable income after dividend paid deduction due to Section 382 limitations was $242.0 million , comprising $241.8 million of federal and $0.2 million of state. The beginning and ending balances of the Company's unrecognized tax benefits are reconciled below for the years ended December 31 (in thousands): 2017 2016 2015 Beginning balance $ 72,187 $ 30,845 $ 36,138 Gross increases related to prior year tax positions 6,095 570 — Gross decreases related to prior year tax positions — — (8,645 ) Gross increases related to current year tax positions 19,832 41,972 4,802 Decreases resulting from expiration of statute of limitation (15,410 ) (826 ) (1,450 ) Decreases resulting from settlements (314 ) (374 ) — Ending balance $ 82,390 $ 72,187 $ 30,845 The Company recognizes interest and penalties related to unrecognized tax benefits within income tax benefit (expense) in the consolidated statements of operations. The Company has accrued $2.9 million and $4.4 million for interest and penalties as of December 31, 2017 and 2016 , respectively. The unrecognized tax benefits of $82.4 million as of December 31, 2017 , if subsequently recognized, will affect the Company's effective tax rate favorably at the time when such a benefit is recognized. Due to various tax years open for examination, it is reasonably possible that the balance of unrecognized tax benefits could significantly increase or decrease over the next 12 months as the Company may be subject to either examination by tax authorities or a lapse in statute of limitations. The Company is currently unable to estimate the range of possible adjustments to the balance of unrecognized tax benefits. The Company's income tax returns for the years from 2014 through current remain open to examination by federal and state taxing authorities. In addition, the Company's tax years of 2005 through 2017 remain open and subject to examination by local tax authorities in certain foreign jurisdictions in which the Company has major operations.

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2017
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Purchase Commitments Primarily as a result of the Company’s various IBX expansion projects, as of December 31, 2017 , the Company was contractually committed for $508.2 million of unaccrued capital expenditures, primarily for IBX equipment not yet delivered and labor not yet provided, in connection with the work necessary to open these IBX data centers and make them available to customers for installation. In addition, the Company had numerous other, non-capital purchase commitments in place as of December 31, 2017 , such as commitments to purchase power in select locations, primarily in select locations through 2018 and thereafter, and other open purchase orders for goods or services to be delivered or provided during 2018 and thereafter. Such other miscellaneous purchase commitments totaled $643.6 million as of December 31, 2017 . Contingent Liabilities The Company estimates exposure on certain liabilities, such as indirect and property taxes, based on the best information available at the time of determination. With respect to real and personal property taxes, the Company records what it can reasonably estimate based on prior payment history, current landlord estimates or estimates based on current or changing fixed asset values in each specific municipality, as applicable. However, there are circumstances beyond the Company’s control whereby the underlying value of the property or basis for which the tax is calculated on the property may change, such as a landlord selling the underlying property of one of the Company’s IBX data center leases or a municipality changing the assessment value in a jurisdiction and, as a result, the Company’s property tax obligations may vary from period to period. Based upon the most current facts and circumstances, the Company makes the necessary property tax accruals for each of its reporting periods. However, revisions in the Company’s estimates of the potential or actual liability could materially impact the financial position, results of operations or cash flows of the Company. The Company's indirect and property tax filings in various jurisdictions are subject to examination by local tax authorities. The outcome of any examinations cannot be predicted with certainty. The Company regularly assesses the likelihood of adverse outcomes resulting from these examinations that would affect the adequacy of its tax accruals for each of the reporting periods. If any issues arising from the tax examinations are resolved in a manner inconsistent with the Company’s expectations, the revision of the estimates of the potential or actual liabilities could materially impact the financial position, results of operations, or cash flows of the Company. From time to time, the Company may have certain contingent liabilities that arise in the ordinary course of its business activities. The Company accrues contingent liabilities when it is probable that future expenditures will be made and such expenditures can be reasonably estimated. In the opinion of management, there are no pending claims for which the outcome is expected to result in a material adverse effect in the financial position, results of operations or cash flows of the Company. Employment Agreements The Company has entered into a severance agreement with each of its executive officers that provides for a severance payment equal to the executive officer’s annual base salary and maximum bonus in the event his or her employment is terminated for any reason other than cause or he or she voluntarily resigns under certain circumstances as described in the agreement. In addition, under the agreement, the executive officer is entitled to the payment of his or her monthly health care premiums under the Consolidated Omnibus Budget Reconciliation Act for up to 12 months. For certain executive officers, these benefits are only triggered after a change-in-control of the Company. Indemnification and Guarantor Arrangements As permitted under Delaware law, the Company has agreements whereby the Company indemnifies its officers and directors for certain events or occurrences while the officer or director is, or was serving, at the Company’s request in such capacity. The term of the indemnification period is for the officer's or director's lifetime. The maximum potential amount of future payments the Company could be required to make under these indemnification agreements is unlimited; however, the Company has a director and officer insurance policy that limits the Company’s exposure and enables the Company to recover a portion of any future amounts paid. As a result of the Company’s insurance policy coverage, the Company believes the estimated fair value of these indemnification agreements is minimal. The Company has no liabilities recorded for these agreements as of December 31, 2017 . The Company enters into standard indemnification agreements in the ordinary course of business. Pursuant to these agreements, the Company indemnifies, holds harmless, and agrees to reimburse the indemnified party for losses suffered or incurred by the indemnified party, generally the Company’s business partners or customers, in connection with any U.S. patent, or any copyright or other intellectual property infringement claim by any third party with respect to the Company’s offerings. The term of these indemnification agreements is generally perpetual any time after execution of the agreement. The maximum potential amount of future payments the Company could be required to make under these indemnification agreements is unlimited; however, the Company has never incurred costs to defend lawsuits or settle claims related to these indemnification agreements. As a result, the Company believes the estimated fair value of these agreements is minimal. The Company has no liabilities recorded for these agreements as of December 31, 2017 . The Company enters into arrangements with its business partners, whereby the business partner agrees to provide services as a subcontractor for the Company’s installations. Accordingly, the Company enters into standard indemnification agreements with its customers, whereby the Company indemnifies them for other acts, such as personal property damage, of its subcontractors. The maximum potential amount of future payments the Company could be required to make under these indemnification agreements is unlimited; however, the Company has general and umbrella insurance policies that enable the Company to recover a portion of any amounts paid. The Company has never incurred costs to defend lawsuits or settle claims related to these indemnification agreements. As a result, the Company believes the estimated fair value of these agreements is minimal. The Company has no liabilities recorded for these agreements as of December 31, 2017 . The Company has service level commitment obligations to certain of its customers. As a result, service interruptions or significant equipment damage in the Company’s IBX data centers, whether or not within the Company’s control, could result in service level commitments to these customers. The Company’s liability insurance may not be adequate to cover those expenses. In addition, any loss of services, equipment damage or inability to meet the Company’s service level commitment obligations could reduce the confidence of the Company’s customers and could consequently impair the Company’s ability to obtain and retain customers, which would adversely affect both the Company’s ability to generate revenues and the Company’s operating results. The Company generally has the ability to determine such service level credits prior to the associated revenue being recognized. The Company has no significant liabilities in connection with service level credits as of December 31, 2017 .

Related Party Transactions

Related Party Transactions	12 Months Ended
	Dec. 31, 2017
Related Party Transactions [Abstract]
Related Party Transactions	Related Party Transactions The Company has several significant stockholders and other related parties that are also customers and/or vendors. The Company’s activity of related party transactions was as follows (in thousands): Years ended December 31, 2017 2016 2015 Revenues $ 13,726 $ 11,822 $ 10,745 Costs and services 11,211 14,574 10,808 As of December 31, 2017 2016 Accounts receivable $ 1,321 $ 1,109 Accounts payable 744 1,720 On February 10, 2016, the Company entered into a purchase and sale agreement to acquire land and a building from Prologis, L.P., with which it shares a common board member, for approximately $6.3 million . This transaction is considered a related party transaction but is not reflected in the related party data presented above.

Segment Information

Segment Information	12 Months Ended
	Dec. 31, 2017
Segment Reporting [Abstract]
Segment Information	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 __________________________ (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 _________________________ (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

Subsequent Events

Subsequent Events	12 Months Ended
	Dec. 31, 2017
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events On February 14, 2018 , the Company's Board of Directors declared a quarterly cash dividend of $2.28 per share, which is payable on March 21, 2018 to the Company’s common stockholders of record as of the close of business on February 26, 2018. On February 11, 2018, the Company entered into an agreement to acquire the Infomart Dallas, including its operations and tenants, from ASB Real Estate Investments. At the closing, the Company will deliver $31.0 million in cash, subject to customary adjustments, and will issue $750.0 million aggregate principal amount of 5.000% senior unsecured notes. The transaction is expected to close in mid-2018, subject to satisfaction of closing conditions. The Company will account for this transaction as a business combination using the acquisition method of accounting.

Quarterly Financial Information

Quarterly Financial Information (Unaudited)	12 Months Ended
	Dec. 31, 2017
Quarterly Financial Information Disclosure [Abstract]
Quarterly Financial Information (Unaudited)	Quarterly Financial Information (Unaudited) The Company believes that period-to-period comparisons of its financial results should not be relied upon as an indication of future performance. The Company’s revenues and results of operations have been subject to significant fluctuations, particularly on a quarterly basis, and the Company’s revenues and results of operations could fluctuate significantly quarter-to-quarter and year-to-year. Significant quarterly fluctuations in revenues will cause fluctuations in the Company’s cash flows and the cash and cash equivalents and accounts receivable accounts on the Company’s consolidated balance sheet. Causes of such fluctuations may include the volume and timing of new orders and renewals, the timing of the opening of new IBX data centers, the sales cycle for the Company’s offerings, the introduction of new offerings, changes in prices and pricing models, trends in the internet infrastructure industry, general economic conditions, extraordinary events such as acquisitions or litigation and the occurrence of unexpected events. The unaudited quarterly financial information presented below has been prepared by the Company and reflects all adjustments, consisting only of normal recurring adjustments, which in the opinion of management are necessary to present fairly the financial position and results of operations for the interim periods presented. The following tables present selected quarterly information (in thousands, except per share data): 2017 Quarters Ended March 31 June 30 September 30 December 31 Revenues $ 949,525 $ 1,066,421 $ 1,152,261 $ 1,200,221 Gross profit 480,564 544,218 569,901 580,596 Net income 42,062 45,805 79,900 65,215 EPS Basic EPS 0.58 0.59 1.02 0.83 Diluted EPS 0.57 0.58 1.02 0.82 2016 Quarters Ended March 31 June 30 September 30 December 31 Revenues $ 844,156 $ 900,510 $ 924,676 $ 942,647 Gross profit 416,476 443,543 454,374 476,726 Net income (loss) (31,111 ) 44,711 51,450 61,750 EPS Basic EPS (0.46 ) 0.64 0.73 0.86 Diluted EPS (0.46 ) 0.64 0.72 0.86

Schedule III Real Estate and Ac

Schedule III Real Estate and Accumulated Depreciation	12 Months Ended
	Dec. 31, 2017
SEC Schedule III, Real Estate and Accumulated Depreciation Disclosure [Abstract]
Schedule III Real Estate and Accumulated Depreciation	SCHEDULE III- SCHEDULE OF REAL ESTATE AND ACCUMULATED DEPRECIATION DECEMBER 31, 2017 (Dollars in Thousands) Initial Costs to Company (1) Costs Capitalized Subsequent to Acquisition or Lease Total Costs Encumbrances Land Buildings and Improvements (2) Land Buildings and Improvements (2) Land Buildings and Improvements (2) Accumulated Depreciation (3) Date of Construction Date of Acquisition or Lease (4) Americas: AT1 ATLANTA (METRO) — — — — 123,655 — 123,655 (42,278) N/A 2010 AT2 ATLANTA (METRO) — — — — 42,574 — 42,574 (20,048) N/A 2010 AT3 ATLANTA (METRO) — — — — 4,095 — 4,095 (1,678) N/A 2010 AT4 ATLANTA (METRO) — 5,400 20,209 — 1,823 5,400 22,032 (2,955) 2017 2017 AT5 ATLANTA (METRO) — — 5,011 — 1,552 — 6,563 (1,029) 2017 2017 BG1 BOGOTÁ (METRO), COLOMBIA — — 8,779 — 409 — 9,188 (769) 2017 2017 BO1 BOSTON (METRO) — — — — 11,185 — 11,185 (6,713) N/A 2010 BO2 BOSTON (METRO) — 2,500 30,383 — 214 2,500 30,597 (2,917) 2017 2017 CH1 CHICAGO (METRO) — — — — 161,324 — 161,324 (103,562) 2001 1999 CH2 CHICAGO (METRO) — — — — 108,257 — 108,257 (53,744) 2005 2005 CH3 CHICAGO (METRO) — 9,759 — 351 279,869 10,110 279,869 (99,791) 2007 2006 CH4 CHICAGO (METRO) — — — — 21,976 — 21,976 (9,792) 2010 2009 CH7 CHICAGO (METRO) — 670 10,564 — 88 670 10,652 (1,046) 2017 2017 CU1 CULPEPER (METRO) — 1,019 37,581 — 311 1,019 37,892 (2,788) 2017 2017 CU2 CULPEPER (METRO) — 1,244 48,000 — 367 1,244 48,367 (3,254) 2017 2017 CU3 CULPEPER (METRO) — 1,088 37,387 — 54 1,088 37,441 (2,437) 2017 2017 CU4 CULPEPER (METRO) — 1,372 27,832 — 1,963 1,372 29,795 (1,285) 2017 2017 DA1 DALLAS (METRO) — — — — 74,900 — 74,900 (48,583) 2000 2000 DA2 DALLAS (METRO) — — — — 78,659 — 78,659 (21,955) 2011 2010 DA3 DALLAS (METRO) — — — — 92,408 — 92,408 (30,450) N/A 2010 DA4 DALLAS (METRO) — — — — 18,010 — 18,010 (8,616) N/A 2010 DA6 DALLAS (METRO) — — 20,522 — 110,282 — 130,804 (16,735) 2013 2012 DA7 DALLAS (METRO) — — — — 26,888 — 26,888 (4,964) 2015 2015 DA9 DALLAS (METRO) — 610 15,398 — 89 610 15,487 (1,191) 2017 2017 DA10 DALLAS (METRO) — — 117 — 4,535 — 4,652 (349) 2017 2017 DC1 WASHINGTON, DC (METRO) — — — — 2,435 — 2,435 (574) 2007 1999 DC2 WASHINGTON, DC (METRO) — — — 5,047 158,709 5,047 158,709 (128,668) 1999 1999 Initial Costs to Company (1) Costs Capitalized Subsequent to Acquisition or Lease Total Costs Encumbrances Land Buildings and Improvements (2) Land Buildings and Improvements (2) Land Buildings and Improvements (2) Accumulated Depreciation (3) Date of Construction Date of Acquisition or Lease (4) DC3 WASHINGTON, DC (METRO) — — 37,451 — 53,210 — 90,661 (49,386) 2004 2004 DC4 WASHINGTON, DC (METRO) — 1,906 7,272 — 72,961 1,906 80,233 (49,250) 2007 2005 DC5 WASHINGTON, DC (METRO) — 1,429 4,983 — 89,024 1,429 94,007 (57,411) 2008 2005 DC6 WASHINGTON, DC (METRO) — 1,429 5,082 — 87,709 1,429 92,791 (39,873) 2010 2005 DC7 WASHINGTON, DC (METRO) — — — — 20,851 — 20,851 (11,503) N/A 2010 DC8 WASHINGTON, DC (METRO) — — — — 5,185 — 5,185 (4,739) N/A 2010 DC10 WASHINGTON, DC (METRO) — — 44,601 — 71,706 — 116,307 (41,225) 2012 2011 DC11 WASHINGTON, DC (METRO) — 1,429 5,082 — 175,361 1,429 180,443 (30,071) 2013 2005 DC12 WASHINGTON, DC (METRO) — — 101,783 — 19,101 — 120,884 (1,869) 2017 2017 DC13 WASHINGTON, DC (METRO) — 5,500 25,423 — 364 5,500 25,787 (3,015) 2017 2017 DC14 WASHINGTON, DC (METRO) — 2,560 33,511 — 206 2,560 33,717 (2,330) 2017 2017 DC97 WASHINGTON, DC (METRO) — — 2,021 — 141 — 2,162 (259) 2017 2017 DE1 DENVER (METRO) — — — — 10,260 — 10,260 (7,172) N/A 2010 DE2 DENVER (METRO) — 5,240 23,053 — 14,764 5,240 37,817 (3,814) 2017 2017 HO1 HOUSTON (METRO) — 1,440 23,780 — 3,996 1,440 27,776 (2,679) 2017 2017 LA1 LOS ANGELES (METRO) — — — — 112,209 — 112,209 (64,914) 2000 1999 LA2 LOS ANGELES (METRO) — — — — 11,066 — 11,066 (8,887) 2001 2000 LA3 LOS ANGELES (METRO) — — 34,727 3,959 24,296 3,959 59,023 (45,521) 2005 2005 LA4 LOS ANGELES (METRO) — 19,333 137,630 — 29,032 19,333 166,662 (68,944) 2009 2009 LA7 LOS ANGELES (METRO) — 7,800 33,621 — 124 7,800 33,745 (2,544) 2017 2017 MI1 MIAMI (METRO) — 18,920 127,194 — 31,502 18,920 158,696 (11,253) 2017 2017 MI2 MIAMI (METRO) — — — — 25,776 — 25,776 (11,815) N/A 2010 MI3 MIAMI (METRO) — — — — 31,148 — 31,148 (10,329) 2012 2012 MI6 MIAMI (METRO) — 4,750 23,017 — 1,538 4,750 24,555 (2,231) 2017 2017 NY1 NEW YORK (METRO) — — — — 80,528 — 80,528 (45,712) 1999 1999 NY2 NEW YORK (METRO) — — — 17,859 199,508 17,859 199,508 (125,823) 2002 2000 NY4 NEW YORK (METRO) — — — — 338,384 — 338,384 (167,338) 2007 2006 NY5 NEW YORK (METRO) — — — — 254,899 — 254,899 (50,791) 2012 2010 NY6 NEW YORK (METRO) — — — — 73,350 — 73,350 (8,658) 2015 2010 NY7 NEW YORK (METRO) — — 24,660 — 146,688 — 171,348 (101,925) N/A 2010 NY8 NEW YORK (METRO) — — — — 12,188 — 12,188 (7,195) N/A 2010 Initial Costs to Company (1) Costs Capitalized Subsequent to Acquisition or Lease Total Costs Encumbrances Land Buildings and Improvements (2) Land Buildings and Improvements (2) Land Buildings and Improvements (2) Accumulated Depreciation (3) Date of Construction Date of Acquisition or Lease (4) NY9 NEW YORK (METRO) — — — — 54,514 — 54,514 (31,583) N/A 2010 NY11 NEW YORK (METRO) — 2,050 58,717 — 3,086 2,050 61,803 (4,707) 2017 2017 NY12 NEW YORK (METRO) — 3,460 10,380 — 1,571 3,460 11,951 (942) 2017 2017 NY13 NEW YORK (METRO) — — 31,603 — 1,527 — 33,130 (2,829) 2017 2017 PH1 PHILADELPHIA (METRO) — — — — 43,862 — 43,862 (12,765) N/A 2010 RJ1 RIO DE JANEIRO (METRO), BRAZIL — — — — 23,297 — 23,297 (16,898) 2011 2011 RJ2 RIO DE JANEIRO (METRO), BRAZIL — — 2,012 1,986 53,635 1,986 55,647 (13,460) 2013 2012 SE2 SEATTLE (METRO) — — — — 30,282 — 30,282 (23,003) N/A 2010 SE3 SEATTLE (METRO) — — 1,760 — 95,706 — 97,466 (28,649) 2013 2011 SE4 SEATTLE (METRO) — 4,000 12,903 — (112) 4,000 12,791 (1,669) 2017 2017 SP1 SÃO PAULO (METRO), BRAZIL — — 10,188 — 24,862 — 35,050 (21,485) 2011 2011 SP2 SÃO PAULO (METRO), BRAZIL — — — — 85,948 — 85,948 (46,937) 2011 2011 SP3 SÃO PAULO (METRO), BRAZIL — 12,148 72,997 — 8,208 12,148 81,205 (5,011) 2017 2017 SP4 SÃO PAULO (METRO), BRAZIL — — 24,633 — 1,572 — 26,205 (2,810) 2017 2017 SV1 SILICON VALLEY (METRO) — — — 15,545 162,162 15,545 162,162 (108,646) 1999 1999 SV2 SILICON VALLEY (METRO) — — — — 150,653 — 150,653 (76,489) 2003 2003 SV3 SILICON VALLEY (METRO) — — — — 45,592 — 45,592 (40,301) 2004 1999 SV4 SILICON VALLEY (METRO) — — — — 27,184 — 27,184 (20,935) 2005 2005 SV5 SILICON VALLEY (METRO) — 6,238 98,991 — 90,853 6,238 189,844 (53,708) 2010 2010 SV6 SILICON VALLEY (METRO) — — 15,585 — 22,785 — 38,370 (25,454) N/A 2010 SV8 SILICON VALLEY (METRO) — — — — 50,520 — 50,520 (26,134) N/A 2010 SV10 SILICON VALLEY (METRO) — 12,646 123,594 — 6,939 12,646 130,533 (2,816) 2017 2017 SV12 SILICON VALLEY (METRO) — 20,313 — — 2,340 20,313 2,340 — 2015 2015 SV13 SILICON VALLEY (METRO) — — 3,828 — 52 — 3,880 (635) 2017 2017 SV14 SILICON VALLEY (METRO) — 3,638 5,503 — 181 3,638 5,684 (361) 2017 2017 SV15 SILICON VALLEY (METRO) — 7,651 23,060 — 72 7,651 23,132 (1,605) 2017 2017 SV16 SILICON VALLEY (METRO) — 4,271 15,018 — 274 4,271 15,292 (1,201) 2017 2017 SV17 SILICON VALLEY (METRO) — — 17,493 — 526 — 18,019 (2,906) 2017 2017 TR1 TORONTO (METRO), CANADA — — — — 96,425 — 96,425 (25,161) N/A 2010 TR2 TORONTO (METRO), CANADA — — 21,113 — 101,996 — 123,109 (12,821) 2015 2015 OTHERS (5) — 70,803 19,365 — 8,408 70,803 27,773 (4,085) Various Various Initial Costs to Company (1) Costs Capitalized Subsequent to Acquisition or Lease Total Costs Encumbrances Land Buildings and Improvements (2) Land Buildings and Improvements (2) Land Buildings and Improvements (2) Accumulated Depreciation (3) Date of Construction Date of Acquisition or Lease (4) EMEA: AD1 ABU DHABI (METRO), UNITED ARAB EMIRATES — — — — 387 — 387 (45) N/A 2017 AM1 AMSTERDAM (METRO), THE NETHERLANDS — — — — 88,460 — 88,460 (33,378) 2008 2008 AM2 AMSTERDAM (METRO), THE NETHERLANDS — — — — 75,488 — 75,488 (24,556) 2010 2008 AM3 AMSTERDAM (METRO), THE NETHERLANDS — — 27,099 — 124,113 — 151,212 (36,011) 2012 2011 AM4 AMSTERDAM (METRO), THE NETHERLANDS — — — — 119,113 — 119,113 (1,087) 2016 2016 AM5 AMSTERDAM (METRO), THE NETHERLANDS — — 92,199 — 17,650 — 109,849 (13,629) N/A 2016 AM6 AMSTERDAM (METRO), THE NETHERLANDS — 6,616 50,876 933 59,412 7,549 110,288 (6,985) N/A 2016 AM7 AMSTERDAM (METRO), THE NETHERLANDS — — 7,397 — 8,528 — 15,925 (1,699) N/A 2016 AM8 AMSTERDAM (METRO), THE NETHERLANDS — — — — 10,657 — 10,657 (2,670) N/A 2016 BA1 BARCELONA (METRO), SPAIN — — 9,443 — 290 — 9,733 (256) N/A 2017 DB1 DUBLIN (METRO), IRELAND — — — — 3,080 — 3,080 (731) N/A 2016 DB2 DUBLIN (METRO), IRELAND — — 12,460 — 3,032 — 15,492 (3,543) N/A 2016 DB3 DUBLIN (METRO), IRELAND — 3,334 54,387 470 18,163 3,804 72,550 (7,754) N/A 2016 DB4 DUBLIN (METRO), IRELAND — — 26,875 — 17,297 — 44,172 (3,307) N/A 2016 DU1 DÜSSELDORF (METRO), GERMANY — — — 8,644 33,567 8,644 33,567 (21,137) 2001 2000 DX1 DUBAI (METRO), UNITED ARAB EMIRATES — — — — 84,493 — 84,493 (8,695) 2012 2008 DX2 DUBAI (METRO), UNITED ARAB EMIRATES — — — — 2,594 — 2,594 (11) N/A 2017 EN1 ENSCHEDE (METRO), THE NETHERLANDS — — — — 29,382 — 29,382 (17,764) 2008 2008 FR1 FRANKFURT (METRO), GERMANY — — — — 7,615 — 7,615 (7,371) N/A 2007 FR2 FRANKFURT (METRO), GERMANY — — — 13,132 335,573 13,132 335,573 (99,648) N/A 2007 FR3 FRANKFURT (METRO), GERMANY — — — — 1,172 — 1,172 (1,157) N/A 2007 FR4 FRANKFURT (METRO), GERMANY — 11,578 9,307 1,633 74,071 13,211 83,378 (21,689) 2009 2009 Initial Costs to Company (1) Costs Capitalized Subsequent to Acquisition or Lease Total Costs Encumbrances Land Buildings and Improvements (2) Land Buildings and Improvements (2) Land Buildings and Improvements (2) Accumulated Depreciation (3) Date of Construction Date of Acquisition or Lease (4) FR5 FRANKFURT (METRO), GERMANY 30,310 — — 4,240 148,382 4,240 148,382 (30,480) 2012 2012 FR6 FRANKFURT (METRO), GERMANY — — — — 106,231 — 106,231 (2,336) 2016 2016 FR7 FRANKFURT (METRO), GERMANY — — 43,634 — 12,865 — 56,499 (8,816) N/A 2016 GV1 GENEVA (METRO), SWITZERLAND — — — — 7,493 — 7,493 (4,625) 2004 2004 GV2 GENEVA (METRO), SWITZERLAND — — — — 23,250 — 23,250 (17,044) 2010 2009 HE1 HELSINKI (METRO), FINLAND — — — — 3,626 — 3,626 (1,362) N/A 2016 HE2 HELSINKI (METRO), FINLAND — — — — 1,638 — 1,638 (1,023) N/A 2016 HE3 HELSINKI (METRO), FINLAND — — — — 11,758 — 11,758 (4,971) N/A 2016 HE4 HELSINKI (METRO), FINLAND — — 29,092 — 8,007 — 37,099 (6,697) N/A 2016 HE5 HELSINKI (METRO), FINLAND — — 7,564 — 1,233 — 8,797 (2,358) N/A 2016 HE6 HELSINKI (METRO), FINLAND — — 17,204 1,791 25,836 1,791 43,040 (2,717) N/A 2016 IS1 ISTANBUL (METRO), TURKEY — — — — 8,166 — 8,166 (4,042) N/A 2016 IS2 ISTANBUL (METRO), TURKEY — 14,460 39,289 — 1,332 14,460 40,621 (298) N/A 2017 LD3 LONDON (METRO), UNITED KINGDOM — — — — 16,526 — 16,526 (11,886) 2005 2000 LD4 LONDON (METRO), UNITED KINGDOM — — 23,044 — 69,365 — 92,409 (39,185) 2007 2007 LD5 LONDON (METRO), UNITED KINGDOM — — 16,412 — 183,250 — 199,662 (68,682) 2010 2010 LD6 LONDON (METRO), UNITED KINGDOM — — — — 121,069 — 121,069 (12,525) 2015 2013 LD8 LONDON (METRO), UNITED KINGDOM — — 107,544 — 18,577 — 126,121 (15,891) N/A 2016 LD9 LONDON (METRO), UNITED KINGDOM — — 181,431 — 32,756 — 214,187 (26,163) N/A 2016 LD10 LONDON (METRO), UNITED KINGDOM — — 40,251 — 63,905 — 104,156 (2,203) N/A 2017 LS1 LISBON (METRO), PORTUGAL — — 7,374 2,789 820 2,789 8,194 (193) 2017 2017 MA1 MANCHESTER (METRO), UNITED KINGDOM — — — — 6,453 — 6,453 (1,765) N/A 2016 MA2 MANCHESTER (METRO), UNITED KINGDOM — — — — 10,439 — 10,439 (2,586) N/A 2016 MA3 MANCHESTER (METRO), UNITED KINGDOM — — 44,931 — 6,813 — 51,744 (9,862) N/A 2016 MA4 MANCHESTER (METRO), UNITED KINGDOM — — 6,697 — 1,957 — 8,654 (3,245) N/A 2016 Initial Costs to Company (1) Costs Capitalized Subsequent to Acquisition or Lease Total Costs Encumbrances Land Buildings and Improvements (2) Land Buildings and Improvements (2) Land Buildings and Improvements (2) Accumulated Depreciation (3) Date of Construction Date of Acquisition or Lease (4) MD1 MADRID (METRO), SPAIN — — 8,120 — 250 — 8,370 (165) N/A 2017 MD2 MADRID (METRO), SPAIN — — 40,952 — 2,733 — 43,685 (1,083) N/A 2017 ML1 MILAN (METRO), ITALY — — — — 134 — 134 (1) 2011 2011 ML2 MILAN (METRO), ITALY — — — — 7,967 — 7,967 (5,026) N/A 2016 ML3 MILAN (METRO), ITALY — — — 3,344 33,566 3,344 33,566 (8,620) N/A 2016 ML4 MLAN (METRO), ITALY — — — — 8,424 — 8,424 (2,667) N/A 2016 MU1 MUNICH (METRO), GERMANY — — — — 19,124 — 19,124 (14,244) N/A 2007 MU3 MUNICH (METRO), GERMANY — — — — 2,431 — 2,431 (1,088) 2010 2010 PA1 PARIS (METRO), FRANCE — — — — 25,484 — 25,484 (19,996) N/A 2007 PA2 & PA3 PARIS (METRO), FRANCE — — 29,615 27,071 292,453 27,071 322,068 (101,473) 2010 2007 PA4 PARIS (METRO), FRANCE — 1,701 9,503 239 228,289 1,940 237,792 (40,718) 2012 2011 PA5 PARIS (METRO), FRANCE — — 16,554 — 3,072 — 19,626 (3,263) N/A 2016 PA6 PARIS (METRO), FRANCE — — — — 66,000 — 66,000 (13,605) N/A 2016 PA7 PARIS (METRO), FRANCE — — — — 16,137 — 16,137 (3,976) N/A 2016 SA1 SEVILLE (METRO), SPAIN — — 1,594 — 49 — 1,643 (75) N/A 2017 SK1 STOCKHOLM, (METRO), SWEDEN — — 15,495 — 6,758 — 22,253 (4,131) N/A 2016 SK2 STOCKHOLM, (METRO), SWEDEN — — 80,148 — 14,171 — 94,319 (10,539) N/A 2016 SK3 STOCKHOLM, (METRO), SWEDEN — — — — 15,255 — 15,255 (2,005) N/A 2016 SO1 SOFIA (METRO), BULGARIA — — 5,236 2,984 1,654 2,984 6,890 (860) N/A 2016 WA1 WARSAW (METRO), POLAND — — 5,950 — 5,356 — 11,306 (2,402) N/A 2016 WA2 WARSAW (METRO), POLAND — — 4,709 3,038 8,278 3,038 12,987 (1,649) N/A 2016 ZH1 ZURICH (METRO), SWITZERLAND — — — — 4,919 — 4,919 (4,376) N/A 2007 ZH2 ZURICH (METRO), SWITZERLAND — — — — 5,025 — 5,025 (3,502) 2003 2002 ZH4 ZURICH (METRO), SWITZERLAND — — 11,284 — 29,805 — 41,089 (21,868) 2010 2009 ZH5 ZURICH (METRO), SWITZERLAND — — — 7,987 59,474 7,987 59,474 (15,119) 2013 2009 ZW1 ZWOLLE (METRO), THE NETHERLANDS — — — — 9,453 — 9,453 (5,416) 2008 2008 OTHERS (5) — 3,184 1,293 395 22,490 3,579 23,783 (914) Various Various Initial Costs to Company (1) Costs Capitalized Subsequent to Acquisition or Lease Total Costs Encumbrances Land Buildings and Improvements (2) Land Buildings and Improvements (2) Land Buildings and Improvements (2) Accumulated Depreciation (3) Date of Construction Date of Acquisition or Lease (4) Asia-Pacific: HK1 HONG KONG (METRO), CHINA — — — — 148,027 — 148,027 (76,233) N/A 2003 HK2 HONG KONG (METRO), CHINA — — — — 241,480 — 241,480 (74,971) 2011 2010 HK3 HONG KONG (METRO), CHINA — — — — 133,673 — 133,673 (52,731) N/A 2012 HK4 HONG KONG (METRO), CHINA — — — — 6,913 — 6,913 (4,882) N/A 2012 HK5 HONG KONG (METRO), CHINA — — 70,002 — 31,781 — 101,783 (548) 2017 2017 ME1 MELBOURNE (METRO), AUSTRALIA — 15,341 — 1,269 73,238 16,610 73,238 (10,711) 2013 2013 OS1 OSAKA (METRO), JAPAN — — 14,876 — 53,015 — 67,891 (12,946) 2013 2013 SG1 SINGAPORE (METRO) — — — — 178,617 — 178,617 (116,756) N/A 2003 SG2 SINGAPORE (METRO) — — — — 322,842 — 322,842 (135,587) 2008 2008 SG3 SINGAPORE (METRO) — — 34,844 — 110,842 — 145,686 (20,324) 2013 2013 SH2 SHANGHAI (METRO), CHINA — — — — 3,921 — 3,921 (1,369) 2012 2012 SH3 SHANGHAI (METRO), CHINA — — 7,066 — 9,650 — 16,716 (4,595) 2012 2012 SH4 SHANGHAI (METRO), CHINA — — — — 1,707 — 1,707 (1,875) 2012 2012 SH5 SHANGHAI (METRO), CHINA — — 11,284 — 21,513 — 32,797 (8,463) 2012 2012 SH6 SHANGHAI (METRO), CHINA — — 16,545 — 1,893 — 18,438 — N/A 2017 SY1 SYDNEY (METRO), AUSTRALIA — — — — 26,684 — 26,684 (14,867) N/A 2003 SY2 SYDNEY (METRO), AUSTRALIA — — 3,080 — 35,042 — 38,122 (21,647) 2008 2008 SY3 SYDNEY (METRO), AUSTRALIA — — 8,712 — 148,640 — 157,352 (56,626) 2010 2010 SY4 SYDNEY (METRO), AUSTRALIA — — — — 145,683 — 145,683 (9,490) 2015 2014 TY1 TOKYO (METRO), JAPAN — — — — 19,426 — 19,426 (10,395) 2000 2000 TY2 TOKYO (METRO), JAPAN — — — — 85,617 — 85,617 (60,135) 2007 2006 TY3 TOKYO (METRO), JAPAN — — — — 73,526 — 73,526 (29,924) 2010 2010 TY4 TOKYO (METRO), JAPAN — — — — 53,000 — 53,000 (15,975) 2012 2012 TY5 TOKYO (METRO), JAPAN — — 102 — 52,606 — 52,708 (5,060) 2014 2014 TY6 TOKYO (METRO), JAPAN — — 37,941 — 11,646 — 49,587 (12,113) N/A 2015 TY7 TOKYO (METRO), JAPAN — — 13,175 — 4,669 — 17,844 (5,597) N/A 2015 TY8 TOKYO (METRO), JAPAN — — 53,848 — 5,505 — 59,353 (10,006) N/A 2015 TY9 TOKYO (METRO), JAPAN — — 106,710 — 6,877 — 113,587 (24,123) N/A 2015 TY10 TOKYO (METRO), JAPAN — — 69,881 — 11,665 — 81,546 (10,751) N/A 2015 OTHERS (5) — — — — 32,794 — 32,794 (15,986) Various Various Initial Costs to Company (1) Costs Capitalized Subsequent to Acquisition or Lease Total Costs Encumbrances Land Buildings and Improvements (2) Land Buildings and Improvements (2) Land Buildings and Improvements (2) Accumulated Depreciation (3) Date of Construction Date of Acquisition or Lease (4) TOTAL LOCATIONS $30,310 $298,830 $3,058,446 $124,706 $9,465,753 $423,536 $12,524,199 $(3,980,198) __________________________ (1) The initial cost was $0 if the lease of the respective IBX was classified as an operating lease. (2) Building and improvements include all fixed assets except for land. (3) Buildings and improvements are depreciated on a straight line basis over estimated useful live as described under described in Note 1 of Notes to Condensed Consolidated Financial Statements in Item 8 of this Annual Report on Form 10-K (4) Date of lease or acquisition represents the date the Company leased the facility or acquired the facility through purchase or acquisition. (5) Includes various IBXs that are under initial development and costs incurred at certain central locations supporting various IBX functions. The aggregate gross cost of the Company's properties for federal income tax purpose approximated $17,901.9 million (unaudited) as of December 31, 2017 . The following table reconciles the historical cost of the Company’s properties for financial reporting purposes for each of the years in the three-year period ended December 31, 2017 (in thousands). Gross Fixed Assets: 2017 2016 2015 Balance, beginning of period $ 9,855,811 $ 7,871,890 $ 7,006,695 Additions (including acquisitions and improvements) 2,508,333 2,187,306 1,172,855 Disposals (78,886 ) (78,607 ) (9,295 ) Foreign currency transaction adjustments and others 662,477 (124,778 ) (298,365 ) Balance, end of year $ 12,947,735 $ 9,855,811 $ 7,871,890 Accumulated Depreciation: 2017 2016 2015 Balance, beginning of period $ (3,175,972 ) $ (2,595,648 ) $ (2,242,345 ) Additions (depreciation expense) (748,942 ) (618,970 ) (440,002 ) Disposals 65,922 9,401 7,396 Foreign currency transaction adjustments and others (121,206 ) 29,245 79,303 Balance, end of year $ (3,980,198 ) $ (3,175,972 ) $ (2,595,648 )

Nature of Business and Summar28

Nature of Business and Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2017
Accounting Policies [Abstract]
Basis of Presentation, Consolidation and Foreign Currency	Basis of Presentation, Consolidation and Foreign Currency The accompanying consolidated financial statements include the accounts of Equinix and its subsidiaries, including the acquisitions of Itconic from October 9, 2017, the Zenium data center from October 6, 2017, the Verizon data center business from May 1, 2017, the IO UK data center operating business from February 3, 2017, the Paris IBX Data Center from August 1, 2016, TelecityGroup from January 15, 2016, Bit-isle from November 2, 2015 and Nimbo from January 14, 2015. All intercompany accounts and transactions have been eliminated in consolidation. Foreign exchange gains or losses resulting from foreign currency transactions, including intercompany foreign currency transactions, that are anticipated to be repaid within the foreseeable future, are reported within other income (expense) on the Company’s accompanying consolidated statements of operations. For additional information on the impact of foreign currencies to the Company’s consolidated financial statements, see "Accumulated Other Comprehensive Loss" in Note 11.
Use of Estimates	Use of Estimates The preparation of consolidated financial statements in conformity with accounting principles generally accepted in the United States ("U.S.") requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from these estimates. On an ongoing basis, the Company evaluates its estimates, including, but not limited to, those related to the allowance for doubtful accounts, fair values of financial instruments, intangible assets and goodwill, useful lives of intangible assets and property, plant and equipment, assets acquired and liabilities assumed from acquisitions, asset retirement obligations and income taxes. The Company bases its estimates on historical experience and on various other assumptions that are believed to be reasonable.
Cash, Cash Equivalents and Short-Term and Long-Term Investments	Cash, Cash Equivalents and Short-Term and Long-Term Investments The Company considers all highly liquid instruments with an original maturity from the date of purchase of three months or less to be cash equivalents. Cash equivalents consist of money market mutual funds and certificates of deposit with original maturities up to 90 days. Short-term investments generally consist of certificates of deposit with original maturities of between 90 days and one year. Long-term investments consist of certificates of deposit with original maturities of one year or more and publicly traded equity securities. The Company’s investments in publicly traded equity securities are classified as "available-for-sale" and are carried at fair value with unrealized gains and losses reported in stockholders’ equity as a component of other comprehensive income (loss). The cost of securities sold is based on the specific identification method. The Company reviews its investment portfolio quarterly to determine if any securities may be other-than-temporarily impaired due to increased credit risk, changes in industry or sector of a certain instrument or ratings downgrades. Cash, Cash Equivalents and Investments. The fair value of the Company's investments in money market funds approximates their face value. Such instruments are included in cash equivalents. The Company’s money market funds and publicly traded equity securities are classified within Level 1 of the fair value hierarchy because they are valued using quoted prices for identical instruments in active markets. The fair value of the Company's other investments, including certificates of deposit, approximates their face value. The fair value of these investments is priced based on the quoted market price for similar instruments or nonbinding market prices that are corroborated by observable market data. Such instruments are classified within Level 2 of the fair value hierarchy. The Company determines the fair values of its Level 2 investments by using inputs such as actual trade data, benchmark yields, broker/dealer quotes, and other similar data, which are obtained from quoted market prices, custody bank, third-party pricing vendors, or other sources. The Company uses such pricing data as the primary input to make its assessments and determinations as to the ultimate valuation of its investment portfolio and has not made, during the periods presented, any material adjustments to such inputs. The Company is responsible for its consolidated financial statements and underlying estimates. The Company uses the specific identification method in computing realized gains and losses. Realized gains and losses on the investments are included within other income (expense) in the Company’s consolidated statements of operations. Short-term and long-term investments are classified as available-for-sale and are carried at fair value with unrealized gains and losses reported in stockholders’ equity as a component of other comprehensive income or loss, net of any related tax effect. The Company reviews its investment portfolio quarterly to determine if any securities may be other-than-temporarily impaired due to increased credit risk, changes in industry or sector of a certain instrument over an extended period of time.
Equity Method and Cost Method Investments	Equity Method and Cost Method Investments The Company's investments in non-marketable equity securities are accounted under the cost method or the equity method. For cost method investments, the Company records the dividends declared by the investees in other income and expense in the consolidated statement of operations and records any dividends in excess of earnings as a reduction of cost of investment. For equity method investments, the Company adjusts the carrying amount of an investment for its share of the earnings and losses of the investees and recognizes its share of income or loss in other income and expense in the consolidated statement of operations. The Company records cost method and equity method investments in other assets in the consolidated balance sheet. The Company reviews these investments periodically to determine if any investments may be other-than-temporarily impaired primarily based on the financial condition and near-term prospects of these companies and funds.
Financial Instruments and Concentration of Credit Risk	Financial Instruments and Concentration of Credit Risk Financial instruments which potentially subject the Company to concentrations of credit risk consist of cash and cash equivalents, short-term investments, long-term investments and accounts receivable. Risks associated with cash and cash equivalents, short-term investments and long-term investments are mitigated by the Company’s investment policy, which limits the Company’s investing to only those marketable securities rated at least A-1/P-1 Short Term Rating and A-/A3 Long Term Rating, as determined by independent credit rating agencies. A significant portion of the Company’s customer base is comprised of businesses throughout the Americas. However, a portion of the Company’s revenues are derived from the Company’s EMEA and Asia-Pacific operations. The following table sets forth percentages of the Company’s revenues by geographic region for the years ended December 31: 2017 2016 2015 Americas 50 % 47 % 55 % EMEA 31 % 32 % 26 % Asia-Pacific 19 % 21 % 19 % No single customer accounted for greater than 10% of accounts receivable or revenues as of or for the years ended December 31, 2017 , 2016 and 2015 .
Property, Plant and Equipment	Property, Plant and Equipment Property, plant and equipment are stated at the Company’s original cost or at fair value for property, plant and equipment acquired through acquisitions, net of depreciation. Depreciation is computed using the straight-line method over the estimated useful lives of the respective assets. Leasehold improvements and integral equipment at leased locations are amortized over the shorter of the lease term or the estimated useful life of the asset or improvement. Leasehold improvements acquired through acquisition are amortized over the shorter of the useful life of the assets or terms that include required lease periods and renewals that are deemed to be reasonably assured at the date of acquisition. Leasehold improvements that are placed into service significantly after and not contemplated at or near the beginning of the lease term are amortized over the shorter of the useful life of the assets or a term that includes required lease periods and renewals that are deemed to be reasonably assured at the date the leasehold improvements are purchased. The Company’s estimated useful lives of its property, plant and equipment are as follows: Core systems 3-25 years Buildings 12-50 years Leasehold improvements 12-40 years Personal Property 3-10 years The Company’s construction in progress includes direct and indirect expenditures for the construction and expansion of IBX data centers and is stated at original cost. The Company has contracted out substantially all of the construction and expansion efforts of its IBX data centers to independent contractors under construction contracts. Construction in progress includes costs incurred under construction contracts including project management services, engineering and schematic design services, design development, construction services and other construction-related fees and services. In addition, the Company has capitalized interest costs during the construction phase. Once an IBX data center or expansion project becomes operational, these capitalized costs are allocated to certain property, plant and equipment categories and are depreciated over the estimated useful life of the underlying assets. The Company reviews its property, plant and equipment for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable such as a significant decrease in market price of an asset, a significant adverse change in the extent or manner in which an asset is being used or in its physical condition, a significant adverse change in legal factors or business climate that could affect the value of an asset or a continuous deterioration of the Company’s financial condition. Recoverability of assets to be held and used is assessed by comparing the carrying amount of an asset to estimated undiscounted future net cash flows expected to be generated by the asset. If the carrying amount of the asset exceeds its estimated discounted future cash flows, an impairment charge is recognized by the amount by which the carrying amount of the asset exceeds the fair value of the asset.
Assets Held for Sale and Discontinued Operations	Assets Held for Sale and Discontinued Operations Assets and liabilities to be disposed of that meet all of the criteria to be classified as held for sale as set forth in the accounting standard for impairment or disposal of long-lived assets are reported at the lower of their carrying amounts or fair values less costs to sell. Assets are not depreciated or amortized while they are classified as held for sale. A component of a reporting entity or a group of components of a reporting entity that are disposed or meet the criteria to be classified as held for sale should be reported in discontinued operations if the disposal represents a strategic shift that has (or will have) a major effect on an entity's operations and financial results. The accounting guidance requires a business activity that, on acquisition, meets the criteria to be classified as held for sale be reported as a discontinued operation. For further information on the Company's assets held for sale and discontinued operations, see Notes 4 and 5.
Asset Retirement Costs	Asset Retirement Costs The fair value of a liability for an asset retirement obligation is recognized in the period in which it is incurred. The associated retirement costs are capitalized and included as part of the carrying value of the long-lived asset and amortized over the useful life of the asset. Subsequent to the initial measurement, the Company accretes the liability in relation to the asset retirement obligations over time and the accretion expense is recorded as a cost of revenue. The Company’s asset retirement obligations are primarily related to its IBX data centers, of which the majority are leased under long-term arrangements, and, in certain cases, are required to be returned to the landlords in their original condition. The majority of the Company’s IBX data center leases have been subject to significant development by the Company in order to convert them from, in most cases, vacant buildings or warehouses into IBX data centers. The majority of the Company’s IBX data centers’ initial lease terms expire at various dates ranging from 2018 to 2065 and most of them enable the Company to extend the lease terms.
Goodwill and Other Intangible Assets	Goodwill and Other Intangible Assets The Company has three reportable segments comprised of the 1) Americas, 2) EMEA and 3) Asia-Pacific geographic regions, which the Company also determined are its reporting units. Goodwill will not be amortized and will be tested for impairment at lease annually. As of December 31, 2017 , the Company had goodwill attributable to its Americas, EMEA and Asia-Pacific reporting units. The Company has the option to assess qualitative factors to determine whether it is more likely than not that the fair value of a reporting unit is less than its carrying value. If, after assessing the qualitative factors, the Company determines that it is not more likely than not that the fair value of a reporting unit is less than its carrying value, then performing the two-step impairment test is unnecessary. However, if the Company concludes otherwise, then it is required to perform the first step of the two-step goodwill impairment test. The first step, identifying a potential impairment, compares the fair value of a reporting unit with its carrying amount, including goodwill. If the carrying value of the reporting unit exceeds its fair value, the second step would need to be conducted; otherwise, no further steps are necessary as no potential impairment exists. The second step, measuring the impairment loss, compares the implied fair value of the reporting unit goodwill with the carrying amount of that goodwill. Any excess of the reporting unit goodwill carrying value over the respective implied fair value is recognized as an impairment loss. The Company assessed qualitative and quantitative factors during the fourth quarter of 2017 to determine whether it was more likely than not that the fair value of its Americas reporting unit, EMEA reporting unit and Asia-Pacific reporting unit was less than its carrying value. Qualitative factors considered in the assessment include industry and market conditions, overall financial performance, and other relevant events and factors affecting the reporting unit. Additionally, as part of this analysis, the Company may perform a quantitative analysis to support the qualitative factors by evaluating sensitivities to assumptions and inputs used in measuring a reporting unit's fair value. In 2016, the Company elected to bypass the qualitative assessment and performed the first step of the two-step goodwill impairment test for its Americas, EMEA and Asia-Pacific reporting units during the fourth quarter of 2016. In order to determine the fair value of each reporting unit, the Company utilizes the discounted cash flow and market methods. The assumptions supporting the discounted cash flow method was determined using the Company’s best estimates as of the date of the impairment review. As of December 31, 2017 and December 31, 2016, the Company concluded that it was more likely than not that goodwill attributed to the Company’s Americas, EMEA and Asia-Pacific reporting units was not impaired as the fair value of each reporting unit exceeded the carrying value of its respective reporting unit, including goodwill. Impairment assessments inherently involve judgment as to assumptions about expected future cash flows and the impact of market conditions on those assumptions. Future events and changing market conditions may impact the Company’s assumptions as to prices, costs, growth rates or other factors that may result in changes in the Company’s estimates of future cash flows. Although the Company believes the assumptions it used in its evaluation of impairment are reasonable, significant changes in any one of the Company’s assumptions could produce a significantly different result. Indicators of potential impairment that might lead the Company to perform interim goodwill impairment assessments include significant and unforeseen customer losses, a significant adverse change in legal factors or in the business climate, a significant adverse action or assessment by a regulator, a significant stock price decline or unanticipated competition. All of our intangible assets are subject to amortization and are amortized using the straight-line method over their estimated period of benefit. We perform a review of other intangible assets for impairment by assessing events or changes in circumstances that indicate the carrying amount of an asset may not be recoverable. Recoverability of assets to be held and used is assessed by comparing the carrying amount of an asset to estimated undiscounted future net cash flows expected to be generated by the asset. If the carrying amount of the asset exceeds its estimated discounted future cash flows, an impairment charge is recognized by the amount by which the carrying amount of the asset exceeds the fair value of the asset. The Company did not record any impairment charges related to its other intangible assets during the years ended December 31, 2017 , 2016 and 2015 . For further information on goodwill and other intangible assets, see Note 2 and Note 6 below.
Debt Issuance Costs	Debt Issuance Costs Loan fees and costs are capitalized and are amortized over the life of the related loans based on the effective interest method. Such amortization is included as a component of interest expense. Debt issuance costs related to outstanding debt are presented as a reduction of the carrying amount of the debt liability and debt issuance costs related to the revolving credit facility are presented as other assets.
Derivatives and Hedging Activities	Derivatives and Hedging Activities The Company recognizes all derivatives on the Company's consolidated balance sheets at fair value. The accounting for changes in the value of a derivative depends on whether or not the contract has been designated and qualifies for hedge accounting. In order to qualify for hedge accounting, a derivative must be considered highly effective at reducing the risk associated with the exposure being hedged. In order for a derivative to be designated as a hedge, there must be documentation of the risk management objective and strategy, including identification of the hedging instrument, the hedged item and the risk exposure, and how effectiveness is to be assessed prospectively and retrospectively. To assess effectiveness of derivatives that qualify for hedge accounting, the Company uses a regression analysis. The extent to which a hedging instrument has been and is expected to continue to be effective at achieving offsetting changes in cash flows is assessed and documented at least quarterly. For qualifying cash flow hedges, the effective portion of the change in the fair value of the derivative is recorded in other comprehensive income (loss) and recognized in the consolidated statements of operations when the hedged cash flows affect earnings in the same statement of operations line item as the hedged item. The ineffective portion of cash flow hedges is immediately recognized in earnings. If it is determined that a derivative is not highly effective at hedging the designated exposure, hedge accounting is discontinued. If the hedge relationship is terminated, then the change in fair value of the derivative recorded in other comprehensive income (loss) is recognized in earnings when the cash flows that were hedged occur, consistent with the original hedge strategy. For hedge relationships discontinued because the forecasted transaction is not expected to occur according to the original strategy, any related derivative amounts recorded in other comprehensive income (loss) are immediately recognized in earnings. Foreign currency gains or losses associated with derivatives that do not qualify for hedge accounting are recorded within other income (expense) in the Company’s consolidated statements of operations, with the exception of foreign currency embedded derivatives contained in certain of the Company’s customer contracts (see "Revenue Recognition" below), which are recorded within revenues in the Company’s consolidated statements of operations. The Company does not use derivatives for speculative or trading purposes. For further information on derivatives and hedging activities, see Note 7 below. Derivative Assets and Liabilities . For derivatives, the Company uses forward contract and option models employing market observable inputs, such as spot currency rates and forward points with adjustments made to these values utilizing published credit default swap rates of its foreign exchange trading counterparties and other comparable companies. The Company has determined that the inputs used to value its derivatives fall within Level 2 of the fair value hierarchy, therefore the derivatives are categorized as Level 2.
Fair Value of Financial Instruments	Fair Value of Financial Instruments The carrying value of the Company’s cash and cash equivalents, short-term investments, long-term investments and derivative instruments represent their fair value, while the Company’s accounts receivable, accounts payable and accrued expenses and accrued property, plant and equipment approximate their fair value due primarily to the short-term maturity of the related instruments. The fair value of the Company’s debt, which is traded in the public debt market, is based on quoted market prices. The fair value of the Company’s debt, which is not publicly traded, is estimated by considering the Company’s credit rating, current rates available to the Company for debt of the same remaining maturities and terms of the debt. Fair Value Measurements The Company measures and reports certain financial assets and liabilities at fair value on a recurring basis, including its investments in money market funds, certificates of deposit, publicly traded equity securities and derivatives. The Company also follows the accounting standard for the measurement of fair value for non-financial assets and liabilities on a nonrecurring basis. These include: • Non-financial assets and non-financial liabilities initially measured at fair value in a business combination or other new basis event, but not measured at fair value in subsequent reporting periods; • Reporting units and non-financial assets and non-financial liabilities measured at fair value for goodwill impairment tests; • Indefinite-lived intangible assets measured at fair value for impairment assessments; • Non-financial long-lived assets or asset groups measured at fair value for impairment assessments or disposal; and • Asset retirement obligations initially measured at fair value but not subsequently measured at fair value. For further information on fair value measurements, see Note 8 below.
Revenue Recognition	Revenue Recognition Equinix derives more than 90% of its revenues from recurring revenue streams, consisting primarily of (1) colocation, which includes the licensing of cabinet space and power; (2) interconnection offerings, such as cross connects and Equinix Exchange ports; (3) managed infrastructure solutions and (4) other revenues consisting of rental income from tenants or subtenants. The remainder of the Company’s revenues are from non-recurring revenue streams, such as installation revenues, certain professional services, contract settlements and equipment sales. Revenues from recurring revenue streams are generally billed monthly and recognized ratably over the term of the contract, generally one to three years for IBX data center colocation customers. Non-recurring installation fees, although generally paid in a lump sum upon installation, are deferred and recognized ratably over the period the customer is expected to benefit from the installation. Professional service fees are recognized in the period in which the services were provided and represent the culmination of a separate earnings process as long as they meet the criteria for separate recognition under the accounting standard related to revenue arrangements with multiple deliverables. Revenue from providing bandwidth access and equipment sales is recognized on a gross basis in accordance with the accounting standard related to reporting revenue gross as a principal versus net as an agent, primarily because the Company acts as the principal in the transaction, takes title to products and services and bears inventory and credit risk. To the extent the Company does not meet the criteria for recognizing bandwidth access and equipment services as gross revenue, the Company records the revenue on a net basis. Revenue from contract settlements, when a customer wishes to terminate their contract early, is generally recognized as the termination occurs, when no remaining related performance obligations exist and the customer is deemed to be creditworthy, to the extent that the revenue has not previously been recognized. The Company guarantees certain service levels, such as uptime, as outlined in individual customer contracts. If these service levels are not achieved due to any failure of the physical infrastructure or offerings, or in the event of certain instances of damage to customer infrastructure within the Company’s IBX data centers, the Company would generally reduce revenue for any credits or cash payments given to the customer as a result. The Company generally determines such service level credits and cash payments prior to the associated revenue being recognized, and historically, these credits and cash payments have generally not been significant. Revenue is recognized only when the service has been provided and when there is persuasive evidence of an arrangement, the fee is fixed or determinable and collection of the receivable is reasonably assured. It is the Company’s customary business practice to obtain a signed master sales agreement and sales order prior to recognizing revenue in an arrangement. Taxes collected from customers and remitted to governmental authorities are reported on a net basis and are excluded from revenue. As a result of certain customer agreements being priced in currencies different from the functional currencies of the parties involved, under applicable accounting rules, the Company is deemed to have foreign currency forward contracts embedded in these contracts. The Company refers to these as foreign currency embedded derivatives (see Note 7). These instruments are separated from their host contracts and held on the Company’s consolidated balance sheet at their fair value. The majority of these foreign currency embedded derivatives arise in certain of the Company’s subsidiaries where the local currency is the subsidiary’s functional currency and the customer contract is denominated in the U.S. dollar. Changes in their fair values are recognized within revenues in the Company’s consolidated statements of operations. The Company assesses collectability based on a number of factors, including past transaction history with the customer and the credit-worthiness of the customer. The Company generally does not request collateral from its customers although in certain cases the Company obtains a security interest in a customer’s equipment placed in its IBX data centers or obtains a deposit. If the Company determines that collection of a fee is not reasonably assured, the fee is deferred and revenue is recognized at the time collection becomes reasonably assured, which is generally upon receipt of cash. In addition, the Company also maintains an allowance for doubtful accounts for estimated losses resulting from the inability of its customers to make required payments for which the Company had expected to collect the revenues. If the financial condition of the Company’s customers were to deteriorate or if they became insolvent, resulting in an impairment of their ability to make payments, greater allowances for doubtful accounts may be required. Management specifically analyzes accounts receivable and current economic news and trends, historical bad debts, customer concentrations, customer credit-worthiness and changes in customer payment terms when evaluating revenue recognition and the adequacy of the Company’s reserves. Any amounts that were previously recognized as revenue and subsequently determined to be uncollectable are charged to bad debt expense included in general and administrative expense in the consolidated statements of operations. A specific bad debt reserve of up to the full amount of a particular invoice value is provided for certain problematic customer balances. An additional reserve is established for all other accounts based on the age of the invoices and an analysis of historical credits issued. Delinquent account balances are written-off after management has determined that the likelihood of collection is not probable.
Income Taxes	Income Taxes Income taxes are accounted for under the asset and liability method. Under this method, deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the year in which those temporary differences are expected to be recovered or settled. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in income in the period that includes the enactment date. Valuation allowances are established when necessary to reduce deferred tax assets to the amounts that are expected more likely than not to be realized in the future. A tax benefit from an uncertain income tax position may be recognized in the financial statements only if it is more likely than not that the position is sustainable, based solely on its technical merits and consideration of the relevant taxing authority’s widely understood administrative practices and precedents.
Stock-Based Compensation	Stock-Based Compensation Stock-based compensation cost is measured at the grant date for all stock-based awards made to employees and directors based on the fair value of the award and is recognized as expense over the requisite service period, which is generally the vesting period. The Company grants restricted stock units to its employees and these equity awards generally have only a service condition. The Company grants restricted stock units to its executives and these awards generally have a service and performance condition or a service and market condition. To date, any performance conditions contained in an equity award are tied to the financial performance of the Company or a specific region of the Company. The Company assesses the probability of meeting these performance conditions on a quarterly basis. The majority of the Company’s equity awards vest over four years, although certain of the equity awards for executives vest over a range of two to four years. The valuation of restricted stock units with only a service condition or a service and performance condition requires no significant assumptions as the fair value for these types of equity awards is based solely on the fair value of the Company’s stock price on the date of grant. The Company uses a Monte Carlo simulation option-pricing model to determine the fair value of restricted stock units with a service and market condition. The Company uses the Black-Scholes option-pricing model to determine the fair value of its employee stock purchase plan. The determination of the fair value of shares purchased under the employee stock purchase plan is affected by assumptions regarding a number of complex and subjective variables including the Company’s expected stock price volatility over the term of the awards and actual and projected employee stock purchase behaviors. The Company estimated the expected volatility by using the average historical volatility of its common stock that it believed was best representative of future volatility. The risk-free interest rate used was based on U.S. Treasury zero-coupon issues with remaining terms similar to the expected term of the equity awards. The expected dividend rate used was based on average dividend yields and the expected term used was equal to the term of each purchase window. The accounting standard for stock-based compensation does not allow the recognition of unrealized tax benefits associated with the tax deductions in excess of the compensation recorded (excess tax benefit) until the excess tax benefit is realized (i.e., reduces taxes payable). In periods prior to 2017, the Company recognized the benefit from stock-based compensation in equity when the excess tax benefit is realized by following the "with-and-without" approach. Upon adoption of ASU No. 2016-09, Compensation - Stock Compensation (Topic 718) on January 1, 2017, the Company records the excess tax benefits from stock-based compensation as income tax expense through the statement of operations instead of additional paid-in capital as required under the previous guidance. For further information on stock-based compensation, see Note 12 below.
Foreign Currency Translation	Foreign Currency Translation The financial position of foreign subsidiaries is translated using the exchange rates in effect at the end of the period, while income and expense items are translated at average rates of exchange during the period. Gains or losses from translation of foreign operations where the local currency is the functional currency are included as other comprehensive income (loss). The net gains and losses resulting from foreign currency transactions are recorded in net income (loss) in the period incurred and reported within other income and expense. Certain inter-company balances are designated as loans of a long-term investment-type nature. Accordingly, exchange gains and losses associated with these long-term inter-company balances are recorded as a component of other comprehensive income (loss), along with translation adjustments.
Earnings Per Share	Earnings Per Share The Company computes basic and diluted EPS for net income. Basic EPS is computed using net income and the weighted-average number of common shares outstanding. Diluted EPS is computed using net income, adjusted for interest expense as a result of the assumed conversion of the Company’s 4.75% Convertible Subordinated Notes, if dilutive, and the weighted-average number of common shares outstanding plus any dilutive potential common shares outstanding. Dilutive potential common shares include the assumed exercise, vesting and issuance activity of employee equity awards using the treasury stock method, as well as shares issuable upon the assumed conversion of the 4.75% Convertible Subordinated Notes. See Note 3 below.
Treasury Stock	Treasury Stock The Company accounts for treasury stock under the cost method. When treasury stock is re-issued at a higher price than its cost, the difference is recorded as a component of additional paid-in capital to the extent that there are gains to offset the losses. If there are no treasury stock gains in additional paid-in capital, the losses are recorded as a component of retained earnings (accumulated deficit).
Recent Accounting Pronouncements	Recent Accounting Pronouncements Accounting Standards Not Yet Adopted In August 2017, Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") No. 2017-12 Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities. This ASU was issued to improve the financial reporting of hedging relationships to better portray the economic results of an entity’s risk management activities in its financial statements and to simplify the application of the hedge accounting guidance in current generally accepted accounting principles ("GAAP"). This ASU permits hedge accounting for risk components involving nonfinancial risk and interest rate risk, requires an entity to present the earnings effect of the hedging instrument in the same income statement line item in which the hedged item is reported, no longer requires separate measurement and reporting of hedge ineffectiveness, eases the requirement for hedge effectiveness assessment, and requires a tabular disclosure related to the effect on the income statement of fair value and cash flow hedges. This ASU is effective for annual or any interim reporting periods beginning after December 15, 2018 with early adoption permitted. The Company is currently evaluating the impact that the adoption of this standard will have on its consolidated financial statements. In May 2017, FASB issued ASU No. 2017-09 Compensation–Stock Compensation (Topic 718). This ASU was issued primarily to provide clarity and reduce both diversity in practice and cost and complexity when applying the guidance in Topic 718 to a change to the terms or conditions of a share-based payment award. This ASU affects any entity that changes the terms or conditions of a share-based payment award. This ASU provides guidance about which changes to the terms or conditions of a share-based payment award require an entity to apply modification accounting in Topic 718. This ASU is effective for annual or any interim reporting periods beginning after December 15, 2017 with early adoption permitted. The Company will adopt this standard effective January 1, 2018. The adoption of ASU 2017-09 is not expected to have a significant impact on its consolidated financial statements. In March 2017, FASB issued ASU No. 2017-07 Compensation–Retirement Benefits (Topic 715). This ASU was issued primarily to improve the presentation of net periodic pension cost and net periodic post-retirement benefit cost. This ASU requires that an employer reports the service cost component in the same line item or items as other compensation costs arising from services rendered by the pertinent employees during the period. It also requires the other components of net periodic pension cost and net periodic post-retirement benefit cost to be presented in the income statement separately from the service cost component and outside a subtotal of income from operations, if one is presented. Additionally, only the service cost component is eligible for capitalization, when applicable. This ASU is effective for annual or any interim reporting periods beginning after December 15, 2017. The Company will adopt this standard effective January 1, 2018. The adoption of ASU 2017-07 is not expected to have a significant impact on its consolidated financial statements. In February 2017, FASB issued ASU No. 2017-05 Other Income—Gains and Losses from the Derecognition of Non-Financial Assets (Subtopic 610-20). This ASU is to clarify the scope of the non-financial asset guidance in Subtopic 610-20 and to add guidance for partial sales of non-financial assets. This ASU defines the term in substance non-financial asset and clarifies that non-financial assets within the scope of Subtopic 610-20 may include non-financial assets transferred within a legal entity to a counterparty. The ASU also provides guidance on the accounting for what often are referred to as partial sales of non-financial assets within the scope of Subtopic 610-20 and contributions of non-financial assets to a joint venture or other non-controlled investee. This ASU is effective for annual or any interim reporting periods beginning after December 15, 2017. Early adoption is permitted for interim or annual reporting periods beginning after December 15, 2016. The Company will adopt this standard effective January 1, 2018. The adoption of this standard is not expected to have a significant impact on its consolidated financial statements. In January 2017, FASB issued ASU No. 2017-04 Intangibles - Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment. This ASU is to simplify the subsequent measurement of goodwill. The ASU eliminates step 2 from the goodwill impairment test and the requirements for any reporting unit with a zero or negative carrying amount to perform a qualitative assessment and, if it fails that qualitative test, to perform step 2 of the goodwill impairment test. An entity still has the option to perform the qualitative assessment for a reporting unit to determine if the quantitative impairment test is necessary. This ASU should be applied on a prospective basis. This ASU is effective for the Company for its annual or any interim goodwill impairment tests in fiscal years beginning after December 15, 2019. Early adoption is permitted for interim or annual goodwill impairment tests performed on testing dates after January 1, 2017. The Company elected to early adopt the standard effective January 1, 2018. The adoption of this standard is not expected to have a significant impact on its consolidated financial statements. In January 2017, FASB issued ASU No. 2017-01, Business Combinations (Topic 805): Clarifying the Definition of a Business. The ASU provides new guidance to assist entities with evaluating when a set of transferred assets and activities is a business. The definition of a business affects many areas of accounting including acquisitions, disposals, goodwill, and consolidation. The ASU is effective for annual periods beginning after December 15, 2017, including interim periods within those periods with early adoption being permitted. The Company will adopt this standard prospectively effective January 1, 2018. The adoption of this standard may impact the accounting of future transactions. In October 2016, FASB issued ASU 2016-16, Income Taxes (Topic 740): Intra-Entity Transfers of Assets Other Than Inventory. This ASU requires the recognition of the income tax consequences of an intra-entity transfer of an asset other than inventory when the transfer occurs. This ASU is effective for fiscal years and interim period within those fiscal years, beginning after December 15, 2017, with early adoption permitted. The Company will adopt this standard effective January 1, 2018. The adoption of this standard is not expected to have a significant impact on its consolidated financial statements. In June 2016, FASB issued ASU 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments. The ASU requires the measurement of all expected credit losses for financial assets held at the reporting date based on historical experience, current conditions, and reasonable and supportable forecasts. The ASU requires enhanced disclosures to help investors and other financial statement users better understand significant estimates and judgments used in estimating credit losses, as well as the credit quality and underwriting standards of an organization's portfolio. These disclosures include qualitative and quantitative requirements that provide additional information about the amounts recorded in the financial statements. In addition, the ASU amends the accounting for credit losses on available-for-sale debt securities and purchased financial assets with credit deterioration. The ASU is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2019, with early adoption permitted for all organizations for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2018. The Company expects this ASU to impact its accounts receivable and is currently evaluating the extent of the impact that the adoption of this standard will have on its consolidated financial statements. In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842) ("ASU 2016-02"). In September 2017, the FASB issued ASU 2017-13 and ASU 2018-01, which provide additional implementation guidance on the previously issued ASU 2016-02. Under the new guidance, lessees will be required to recognize the following for all leases (with the exception of short-term leases) at the commencement date: (1) a lease liability, which is a lessee's obligation to make lease payments arising from a lease, measured on a discounted basis; and (2) a right-of-use asset, which is an asset that represents the lessee's right to use, or control the use of, a specified asset for the lease term. The new lease guidance simplified the accounting for sale and leaseback transactions primarily because lessees must recognize lease assets and lease liabilities. Lessees (for capital and operating leases) and lessors (for sales-type, direct financing, and operating leases) must apply a modified retrospective transition approach for leases existing at, or entered into after, the beginning of the earliest comparative period presented in the financial statements. The modified retrospective approach would not require any transition accounting for leases that expired before the earliest comparative period presented. Lessees and lessors may not apply a full retrospective transition approach. The ASU is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years, with early adoption permitted. The Company plans to elect the practical expedient that it will not reassess whether any expired or existing contracts are or contain leases, the lease classification for any expired or existing leases or initial direct costs for any existing leases. The Company does not plan to elect the practical expedient to use hindsight in determining the lease term and in assessing impairment of right-of-use assets. The Company expects to record a significant increase in assets and liabilities on the consolidated balance sheet at adoption due to the recording of right-of-use assets and corresponding lease liabilities. In January 2016, the FASB issued ASU 2016-01, Financial Instruments- Overall (Subtopic 825-10) ("ASU 2016-01"), which requires all equity investments to be measured at fair value with changes in the fair value recognized through net income other than those accounted for under equity method of accounting or those that result in consolidation of the investees. The ASU also requires that an entity present separately in other comprehensive income the portion of the total change in the fair value of a liability resulting from a change in the instrument-specific credit risk when the entity has elected to measure the liability at fair value in accordance with the fair value option for financial instruments. In addition, the ASU eliminates the requirement to disclose the fair value of financial instruments measured at amortized cost for entities that are not public business entities and the requirement to disclose the method(s) and significant assumptions used to estimate the fair value that is required to be disclosed for financial instruments measured at amortized cost on the balance sheet for public business entities. ASU 2016-01 is effective for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years. The Company currently holds publicly traded equity securities that are classified as "available-for-sale" and are carried at fair value with unrealized gains and losses reported in stockholders’ equity as a component of accumulated other comprehensive income (loss). Upon the adoption of this ASU, the unrealized gains and losses will be recognized through net income. The Company will adopt this standard effective January 1, 2018. The adoption of this standard is not expected to have a significant impact on its consolidated financial statements. In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers ("ASU 2014-09") and issued subsequent amendments to the initial guidance with ASU 2015-14, ASU 2016-08, ASU 2016-10, ASU 2016-11, ASU 2016-12, ASU 2016-20, ASU 2017-13 and ASU 2017-14 collectively referred as "Topic 606." Topic 606 supersedes the existing guidance and requires the entity to recognize revenue for the transfer of goods or services equal to the amount that it expects to be entitled to receive for those goods or services. Topic 606 requires additional disclosure about the nature, amount, timing and uncertainty of revenue and cash flows arising from customer contracts, including significant judgments and changes in judgments. Topic 606 is effective for entities beginning January 1, 2018, with early adoption permitted. The standard allows entities to adopt with one of these two methods: full retrospective, which applies retrospectively to each prior reporting period presented, or modified retrospective, which recognizes the cumulative effect of initially applying the revenue standard as an adjustment to the opening balance of retained earnings in the period of initial application. On January 1, 2018, the Company adopted Topic 606 using the modified retrospective approach applied to the contracts which were not completed as of January 1, 2018 and expects to recognize an increase to retained earnings of approximately $267 million to $307 million before any potential tax impact. The Company is still assessing tax impacts related to this adjustment. The most significant impact to the Company from this standard relates to installation revenue and cost to obtain contracts. Under the new standard, the Company expects to recognize installation revenue over the contract period rather than over the estimated installation life under the prior revenue standard. Under the new standard, the Company is also required to capitalize and amortize certain costs to obtain contracts, rather than expense them immediately under existing GAAP. Accounting Standards Adopted In January 2017, FASB issued ASU No. 2017-03, Accounting Changes and Error Corrections (Topic 250). The ASU adds SEC disclosure requirements for both the quantitative and qualitative impacts that certain recently issued accounting standards will have on the financial statements of a registrant when such standards are adopted in a future period. Specially, these disclosure requirements apply to the adoption of ASU No. 2014-09, Revenue from Contracts with Customers (Topic 606); ASU No. 2016-02, Leases (Topic 842); and ASU No. 2016-13, Financial Instruments-Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments. This ASU is effective immediately. The Company adopted ASU 2017-03 in the three months ended March 31, 2017 by including appropriate disclosure requirements within its condensed consolidated financial statements to adhere to this new standard. In December 2016, FASB issued ASU No. 2016-19, Technical Corrections and Improvements. This ASU covers a wide range of Topics in the Accounting Standards Codification. Certain aspects of this ASU were effective immediately, while a few of the corrections are effective for the Company for its fiscal years beginning after December 15, 2016, and interim periods within those fiscal years. The Company adopted ASU 2016-19 in the three months ended March 31, 2017. The adoption of ASU 2016-19 did not impact the Company's consolidated financial statements. In November 2016, FASB issued ASU No. 2016-18, Statement of Cash Flows (Topic 230): Restricted Cash. This ASU applies to all entities that have restricted cash or restricted cash equivalents and are required to present a statement of cash flows. The ASU requires that a statement of cash flows explain the change during the period in the total of cash, cash equivalents, and amounts generally described as restricted cash or restricted cash equivalents. As a result, amounts generally described as restricted cash and restricted cash equivalents should be included with cash and cash equivalents when reconciling the beginning-of-period and end-of-period total amounts shown on the statement of cash flows. This ASU is effective for the Company for its fiscal years beginning after December 15, 2017, and interim periods within those fiscal years with early adoption being permitted. This ASU should be applied using a retrospective transition method to each period presented. The Company adopted ASU 2016-18 in the three months ended March 31, 2017 and applied this ASU retrospectively to the periods presented in the Company's consolidated statements of cash flows. Net cash used in investing activities were adjusted to exclude the change in restricted cash primarily related to restricted cash set aside for the TelecityGroup acquisition, resulting in an increased in the previously reported amount by $453.5 million for the year ended December 31, 2016 and a decrease in the previously reported amount by $497.1 million for the year ended December 31, 2015. Restricted cash amounts are primarily time deposits or cash set side as a pledge for our mortgage loan in Germany, an escrow account for a data center project and collateral for the Company's various bank guarantees for the periods ended December 31, 2017 and 2016. In October 2016, FASB issued ASU No. 2016-17, Consolidation (Topic 810): Interests Held through Related Parties That Are under Common Control. This ASU alters how a decision maker needs to consider indirect interests in a variable interest entity ("VIE") held through an entity under common control. Under this ASU, if a decision maker is required to evaluate whether it is the primary beneficiary of a VIE, it will need to consider only its proportionate indirect interest in the VIE held through a common control party. This ASU is effective for fiscal years beginning after December 15, 2016, including interim periods within those fiscal years, with early adoption permitted. The Company adopted ASU 2016-17 in the three months ended March 31, 2017. The adoption of this standard did not impact the Company's consolidated financial statements as it does not hold any interests in a VIE through related parties that are under common control. In August 2016, FASB issued ASU 2016-15, Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments. This ASU provides guidance on the classification of eight cash flow issues to reduce the existing diversification in practice, including (a) debt prepayment or debt extinguishment costs; (b) settlement of zero-coupon debt instruments or other debt instruments with coupon interest rates that are not significant in relation to the effective interest rate of the borrowing; (c) contingent consideration payments made after a business combination; (d) proceeds from settlement of insurance claims; (e) proceeds from the settlement of corporate-owned life insurance policies, including bank-owned life insurance policies; (f) distributions received from equity method investees; (g) beneficial interests in securitization transactions; and (h) separately identifiable cash flows and application of the predominance principle. The ASU is effective for fiscal years and interim period within those fiscal years, beginning after December 15, 2017, with early adoption permitted. The Company adopted ASU 2016-15 in the three months ended March 31, 2017 and applied this ASU using a retrospective transition method to each period presented in the Company's consolidated statements of cash flows. The adoption of ASU 2016-15 did not impact the Company's consolidated statements of cash flows. In March 2016, the FASB issued ASU 2016-09, Compensation - Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting ("ASU 2016-09"). This ASU simplifies several areas of the accounting for share-based payment award transactions, including (a) income tax consequences; (b) classification of awards as either equity or liabilities; and (c) classification on the statement of cash flows. This ASU is effective for annual periods beginning after December 15, 2016, and interim periods within those annual periods, with early adoption permitted. The Company adopted ASU 2016-09 in the three months ended March 31, 2017. Beginning on January 1, 2017, the Company began to record the excess tax benefits from stock-based compensation as income tax expense through the statement of operations instead of additional paid-in capital as required under the previous guidance. There was no adjustment to excess tax benefits from stock-based compensation recorded as additional paid-in capital in prior years. Excess tax benefits that were not previously recognized, as well as a valuation allowance recognized for deferred tax assets as a result of the adoption of this ASU, were recorded on a modified retrospective basis through a cumulative-effect adjustment to retained earnings as of the beginning of 2017 totaling $1.1 million . As a part of the adoption of this ASU, stock compensation awards will have more dilutive effect on the Company's earnings per share prospectively. Under this guidance, cash flows related to excess tax benefits will no longer be separately classified as financing activities apart from other income tax cash flow. The Company elected to apply this part of the guidance retrospectively, which resulted in a change of $2.8 million and $30.0 thousand in both net cash provided by operating activities and net cash used in financing activities in the Company's consolidated statements of cash flows for the years ended December 31, 2016 and December 31, 2015 respectively, to conform with the current period presentation. Additionally, this guidance permits entities to make an accounting policy to estimate forfeitures each period or to account for forfeitures as they occur. The Company elected to continue to estimate forfeitures. In March 2016, the FASB issued ASU 2016-06, Derivatives and Hedging (Topic 815), Contingent Put and Call Options in Debt Instruments ("ASU 2016-06"). This ASU clarifies the requirements for assessing whether contingent call (put) options that can accelerate the payment of principal on debt instruments are clearly and closely related to their debt hosts. An entity performing the assessment under the amendments in this ASU is required to assess the embedded call (put) options solely in accordance with the four-step decision sequence. This guidance is to be applied on a modified retrospective basis to existing debt instruments as of the beginning of the fiscal year in which the amendments are effective, and is effective for fiscal years beginning after December 15, 2016, including interim periods within those fiscal years. The Company adopted ASU 2016-06 in the three months ended March 31, 2017. The adoption of this standard did not impact the Company's consolidated financial statements. In March 2016, the FASB issued ASU 2016-05, Derivatives and Hedging (Topic 815), Effect of Derivative Contract Novations on Existing Hedge Accounting Relationships ("ASU 2016-05"). This ASU clarifies that a change in the counterparty to a derivative instrument that has been designated as a hedging instrument under Topic 815 does not, in and of itself, require dedesignation of that hedging relationship provided that all other hedge accounting criteria continue to be met. This ASU may be applied prospectively or using a modified retrospective approach, and is effective for fiscal years beginning after December 15, 2016, including interim periods within those fiscal years. The Company adopted ASU 2016-05 in the three months ended March 31, 2017. The adoption of ASU 2016-05 did not impact the Company's consolidated financial statements.
Fair Value Valuation Methods	Valuation Methods Fair value estimates are made as of a specific point in time based on methods using the market approach valuation method which uses prices and other relevant information generated by market transactions involving identical or comparable assets or liabilities or other valuation techniques. These techniques involve uncertainties and are affected by the assumptions used and the judgments made regarding risk characteristics of various financial instruments, discount rates, estimates of future cash flows, future expected loss experience and other factors.
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.

Nature of Business and Summar29

Nature of Business and Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2017
Accounting Policies [Abstract]
Schedule of Revenue by Geographical Region	The following table sets forth percentages of the Company’s revenues by geographic region for the years ended December 31: 2017 2016 2015 Americas 50 % 47 % 55 % EMEA 31 % 32 % 26 % Asia-Pacific 19 % 21 % 19 %
Property, Plant and Equipment, Net	The Company’s estimated useful lives of its property, plant and equipment are as follows: Core systems 3-25 years Buildings 12-50 years Leasehold improvements 12-40 years Personal Property 3-10 years Property, plant and equipment, net consisted of the following as of December 31 (in thousands): 2017 2016 Core systems $ 6,334,702 $ 4,760,868 Buildings 3,906,686 2,785,799 Leasehold improvements 1,850,351 1,599,424 Construction in progress 425,428 645,388 Personal property 798,133 622,069 Land 423,539 237,349 13,738,839 10,650,897 Less accumulated depreciation (4,344,237 ) (3,451,687 ) Property, plant and equipment, net $ 9,394,602 $ 7,199,210

Acquisitions (Tables)

Acquisitions (Tables)	12 Months Ended
	Dec. 31, 2017
Business Acquisition [Line Items]
Unaudited Pro Forma Combined Consolidated Statements of Operations	The following table sets forth the unaudited pro forma consolidated combined results of operations for the years ended December 31, 2017 , 2016 and 2015 (in thousands): 2017 2016 2015 Revenues $ 4,509,602 $ 4,053,280 $ 3,244,349 Net income from continuing operations 258,618 19,248 141,496 Basic EPS 3.31 0.25 2.10 Diluted EPS 3.28 0.25 2.08
Verizon
Business Acquisition [Line Items]
Preliminary Purchase Price Allocation	The preliminary purchase price allocation is as follows (in thousands): Certain Verizon Data Center Assets Cash and cash equivalents $ 1,073 Accounts receivable 2,019 Other current assets 7,319 Property, plant, and equipment 840,335 Intangible assets (1) 1,693,900 Goodwill 1,095,262 Total assets acquired 3,639,908 Accounts payable and accrued liabilities (1,725 ) Other current liabilities (2,020 ) Capital lease and other financing obligations (17,659 ) Deferred tax liabilities (18,129 ) Other liabilities (5,689 ) Net assets acquired $ 3,594,686
Itconic, Zenium and IO
Business Acquisition [Line Items]
Preliminary Purchase Price Allocation	A summary of the allocation of total purchase consideration is presented as follows (in thousands): Itconic Zenium data center IO UK's data center Cash and cash equivalents $ 15,659 $ 692 $ 1,388 Accounts receivable 16,429 198 7 Other current assets 1,885 6,430 1,082 Property, plant, and equipment 68,051 53,749 40,251 Intangible assets 99,993 6,400 6,252 Goodwill 125,112 23,077 15,804 Deferred tax assets — — 6,714 Other assets 4,025 5,494 3,396 Total assets acquired 331,154 96,040 74,894 Accounts payable and accrued liabilities (15,846 ) (1,012 ) (439 ) Other current liabilities (12,374 ) (451 ) (168 ) Capital lease and other financing obligations (30,666 ) — (33,091 ) Loans payable (3,253 ) — (4,067 ) Deferred tax liabilities (2,389 ) (1,969 ) — Other liabilities (7,515 ) (614 ) (828 ) Net assets acquired $ 259,111 $ 91,994 $ 36,301
Telecity Group plc
Business Acquisition [Line Items]
Preliminary Purchase Price Allocation	As of the acquisition date, the allocation of the purchase price was as follows (in thousands): TelecityGroup Cash and cash equivalents $ 73,368 Accounts receivable 24,042 Other current assets 41,079 Assets held for sale 877,650 Property, plant and equipment 1,058,583 Goodwill 2,215,567 Intangible assets 694,243 Deferred tax assets 994 Other assets 4,102 Total assets acquired 4,989,628 Accounts payable and accrued expenses (84,367 ) Accrued property, plant and equipment (3,634 ) Other current liabilities (27,233 ) Liabilities held for sale (155,650 ) Capital lease and other financing obligations (165,365 ) Mortgage and loans payable (592,304 ) Deferred tax liabilities (176,168 ) Other liabilities (40,021 ) Net assets acquired $ 3,744,886
Acquired Identifiable Intangible Assets	The following table presents certain information on the acquired intangible assets (dollars in thousands): Intangible Assets Fair Value Estimated Useful Lives (Years) Weighted-average Estimated Useful Lives (Years) Customer relationships $ 591,956 13.5 13.5 Trade names 72,033 1.5 1.5 Favorable leases 30,254 2.0 - 25.4 19.7
Digital Realty
Business Acquisition [Line Items]
Preliminary Purchase Price Allocation	A summary of the allocation of total purchase consideration is presented as follows (in thousands): Paris IBX data center Cash and cash equivalent $ 4,073 Accounts receivable 1,507 Other current assets 794 Property, plant and equipment 143,972 Intangible assets 11,758 Goodwill 48,835 Other assets 81 Total assets acquired 211,020 Accounts payable and accrued liabilities (2,044 ) Other current liabilities (2,798 ) Deferred tax liabilities (42,395 ) Other liabilities (755 ) Net assets acquired $ 163,028
Bit-isle
Business Acquisition [Line Items]
Preliminary Purchase Price Allocation	Based upon the purchase price and the valuation of Bit-isle, the final purchase price allocation was as follows (in thousands): Bit-isle Cash and cash equivalent $ 33,198 Accounts receivable 7,359 Other current assets 51,038 Long-term investments 3,806 Property, plant and equipment 308,985 Goodwill 95,444 Intangible assets 111,374 Other assets 22,981 Total assets acquired 634,185 Accounts payable and accrued expenses (15,028 ) Accrued property, plant and equipment (465 ) Capital lease and other financing obligations (108,833 ) Mortgage and loans payable (190,227 ) Other current liabilities (8,689 ) Deferred tax liabilities (32,192 ) Other liabilities (3,384 ) Net assets acquired $ 275,367
Acquired Identifiable Intangible Assets	The following table presents certain information on the acquired identifiable intangible assets (dollars in thousands): Intangible Assets Fair Value Estimated Useful Lives (Years) Weighted-average Estimated Useful Lives (Years) Customer relationships $ 105,434 13 13 Trade name 3,455 2 2 Favorable solar contracts 2,410 18 18 Other intangible assets 75 0.25 0.25

Earnings Per Share (Tables)

Earnings Per Share (Tables)	12 Months Ended
	Dec. 31, 2017
Earnings Per Share [Abstract]
Computation of Basic and Diluted Earnings Per Share	The following table sets forth the computation of basic and diluted EPS for the years ended December 31 (in thousands, except per share amounts): 2017 2016 2015 Net income from continuing operations $ 232,982 $ 114,408 $ 187,774 Net income from discontinued operations, net of tax — 12,392 — Net income $ 232,982 $ 126,800 $ 187,774 Weighted-average shares used to calculate basic EPS 76,854 70,117 57,790 Effect of dilutive securities: Employee equity awards 681 699 693 Weighted-average shares used to calculate diluted EPS 77,535 70,816 58,483 Basic EPS: Continuing operations $ 3.03 $ 1.63 $ 3.25 Discontinued operations — 0.18 — Basic EPS $ 3.03 $ 1.81 $ 3.25 Diluted EPS: Continuing operations $ 3.00 $ 1.62 $ 3.21 Discontinued operations — 0.17 — Diluted EPS $ 3.00 $ 1.79 $ 3.21
Anti-dilutive Potential Shares of Common Stock Excluded from Computation of Earnings Per Share	The following table sets forth potential shares of common stock that are not included in the diluted EPS calculation above because to do so would be anti-dilutive for the years ended December 31 (in thousands): 2017 2016 2015 Shares related to the potential conversion of 4.75% convertible subordinated notes — 893 1,977 Common stock related to employee equity awards 63 27 88 63 920 2,065

Discontinued Operations (Tables

Discontinued Operations (Tables)	12 Months Ended
	Dec. 31, 2017
Discontinued Operations and Disposal Groups [Abstract]
Financial results of discontinued operations	The following table presents the financial results of the Company's discontinued operations for the year ended December 31, 2016 (in thousands). The Company did not record income from discontinued operations, net of tax for the years ended December 31, 2017 and 2015. 2016 Revenues $ 48,782 Costs and operating expenses: Cost of revenues 24,795 Sales and marketing 1,030 General and administrative 7,026 Total costs and operating expenses 32,851 Income from operations of discontinued operations 15,931 Interest expense and other, net (1,286 ) Income from discontinued operations before income taxes 14,645 Income tax expense (4,604 ) Gain on sale of discontinued operations, net of tax 2,351 Net income from discontinued operations, net of tax $ 12,392

Balance Sheet Components (Table

Balance Sheet Components (Tables)	12 Months Ended
	Dec. 31, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Cash, Cash Equivalents and Short-Term and Long-Term Investments	Cash, cash equivalents and short-term and long-term investments consisted of the following as of December 31 (in thousands): 2017 2016 Cash and cash equivalents: Cash (1) $ 985,382 $ 345,119 Cash equivalents: Money market funds 427,135 400,388 Certificate of deposit — 2,969 Total cash and cash equivalents 1,412,517 748,476 Short-term and long-term investments: Certificates of deposit 31,351 6,988 Publicly traded equity securities 6,163 6,463 Total short-term and long-term investments 37,514 13,451 Total cash, cash equivalents and short-term and long-term investments $ 1,450,031 $ 761,927 _________________________ (1) Excludes restricted cash.
Summary of Cost and Estimated Fair Value of Marketable Securities	The balance of certificates of deposits, by contractual maturity, as of December 31 (in thousands): 2017 2016 Due within one year $ 28,271 $ 3,409 Due after one year through three years 3,080 3,579 Total $ 31,351 $ 6,988
Net Unrealized Gains (Losses) on Available-for-Sale Securities	The net unrealized gains (losses) on its investments as of December 31 were comprised of the following (in thousands): 2017 2016 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value Certificate of deposit $ 31,351 $ — $ — $ 31,351 $ 6,988 $ — $ — $ 6,988 Publicly traded equity securities 3,716 2,447 — 6,163 4,850 1,613 — 6,463 Total $ 35,067 $ 2,447 $ — $ 37,514 $ 11,838 $ 1,613 $ — $ 13,451
Accounts Receivable, Net	Accounts receivable, net, consisted of the following as of December 31 (in thousands): 2017 2016 Accounts receivable $ 594,541 $ 411,920 Allowance for doubtful accounts (18,228 ) (15,675 ) Accounts receivable, net $ 576,313 $ 396,245
Activities of Allowance for Doubtful Accounts	The following table summarizes the activity of the Company’s allowance for doubtful accounts (in thousands): Balance as of December 31, 2014 $ 9,466 Provision for allowance for doubtful accounts 5,037 Net write-offs (3,438 ) Impact of foreign currency exchange (713 ) Balance as of December 31, 2015 10,352 Provision for allowance for doubtful accounts 8,260 Net write-offs (2,521 ) Impact of foreign currency exchange (416 ) Balance as of December 31, 2016 15,675 Provision for allowance for doubtful accounts 5,627 Net write-offs (4,546 ) Impact of foreign currency exchange 1,472 Balance as of December 31, 2017 $ 18,228
Other Current Assets	Other current assets consisted of the following as of December 31 (in thousands): 2017 2016 Prepaid expenses $ 64,832 $ 79,258 Taxes receivable 110,961 102,002 Restricted cash, current 26,919 15,065 Other receivables 7,797 46,809 Derivative instruments 4,175 54,072 Other current assets 17,343 22,190 Total other current assets $ 232,027 $ 319,396
Property, Plant and Equipment, Net	The Company’s estimated useful lives of its property, plant and equipment are as follows: Core systems 3-25 years Buildings 12-50 years Leasehold improvements 12-40 years Personal Property 3-10 years Property, plant and equipment, net consisted of the following as of December 31 (in thousands): 2017 2016 Core systems $ 6,334,702 $ 4,760,868 Buildings 3,906,686 2,785,799 Leasehold improvements 1,850,351 1,599,424 Construction in progress 425,428 645,388 Personal property 798,133 622,069 Land 423,539 237,349 13,738,839 10,650,897 Less accumulated depreciation (4,344,237 ) (3,451,687 ) Property, plant and equipment, net $ 9,394,602 $ 7,199,210
Goodwill and Other Intangible Assets	The following table presents goodwill and other intangible assets, net, for the years ended December 31, 2017 and 2016 (in thousands): 2017 2016 Goodwill: Americas $ 1,561,512 $ 469,438 EMEA 2,610,899 2,281,306 Asia-Pacific 239,351 235,320 $ 4,411,762 $ 2,986,064 Intangible assets, net: Intangible assets - customer relationships $ 2,682,656 $ 839,593 Intangible assets - trade names 73,295 69,519 Intangible assets - favorable leases 39,470 38,139 Intangible assets - licenses 9,696 9,697 Intangible assets - others — 19 2,805,117 956,967 Accumulated amortization - customer relationships (334,985 ) (183,270 ) Accumulated amortization - trade names (71,728 ) (43,830 ) Accumulated amortization - favorable leases (10,196 ) (8,027 ) Accumulated amortization - licenses (3,236 ) (2,591 ) Accumulated amortization - others — (18 ) (420,145 ) (237,736 ) Total intangible assets, net $ 2,384,972 $ 719,231
Carrying Amount of Goodwill by Geographic Regions	Changes in the carrying amount of goodwill by geographic regions are as follows (in thousands): Americas EMEA Asia-Pacific Total Balance as of December 31, 2015 $ 460,203 $ 374,070 $ 228,927 $ 1,063,200 Purchase accounting adjustments - TelecityGroup — 2,215,567 — 2,215,567 Purchase accounting adjustments - Paris IBX Data Center Acquisition — 48,835 — 48,835 Asset held for sale adjustments — 1,605 — 1,605 Impact of foreign currency exchange 9,235 (358,771 ) 6,393 (343,143 ) Balance as of December 31, 2016 469,438 2,281,306 235,320 2,986,064 Purchase accounting adjustments - Verizon Data Center Acquisition 1,095,262 — 1,095,262 Purchase accounting adjustments - Other 2017 acquisitions — 163,993 — 163,993 Impact of foreign currency exchange (3,188 ) 165,600 4,031 166,443 Balance as of December 31, 2017 $ 1,561,512 $ 2,610,899 $ 239,351 $ 4,411,762
Net Book Value of Intangible Assets by Geographic Regions	Changes in the net book value of intangible assets by geographic regions are as follows (in thousands): Americas EMEA Asia-Pacific Total Balance as of December 31, 2014 $ 62,954 $ 62,185 $ 22,388 $ 147,527 Nimbo acquisition 1,089 — — 1,089 Bit-isle acquisition — — 111,374 111,374 Asset held for sale adjustments — (784 ) — (784 ) Write-off of intangible asset — (357 ) — (357 ) Amortization of intangibles (11,432 ) (11,675 ) (4,339 ) (27,446 ) Impact of foreign currency exchange (1,968 ) (5,014 ) 144 (6,838 ) Balance as of December 31, 2015 50,643 44,355 129,567 224,565 TelecityGroup acquisition — 694,243 — 694,243 Paris IBX Data Center Acquisition — 11,758 — 11,758 Sale of Terra Power — — (2,460 ) (2,460 ) Write-off of intangible asset (573 ) — — (573 ) Amortization of intangibles (11,348 ) (97,715 ) (13,799 ) (122,862 ) Impact of foreign currency exchange 1,395 (90,280 ) 3,445 (85,440 ) Balance as of December 31, 2016 40,117 562,361 116,753 719,231 Verizon Data Center Acquisition 1,693,900 — — 1,693,900 Other 2017 acquisitions — 112,645 — 112,645 Write-off of intangible asset — (725 ) — (725 ) Amortization of intangibles (84,749 ) (79,105 ) (13,154 ) (177,008 ) Impact of foreign currency exchange (2,895 ) 36,043 3,781 36,929 Balance as of December 31, 2017 $ 1,646,373 $ 631,219 $ 107,380 $ 2,384,972
Estimated Future Amortization Expense Related to Intangibles	Estimated future amortization expense related to these intangibles is as follows (in thousands): Years ending: 2018 $ 196,469 2019 191,298 2020 184,602 2021 176,740 2022 172,547 Thereafter 1,463,316 Total $ 2,384,972
Other Assets	Other assets consisted of the following as of December 31 (in thousands): 2017 2016 Deferred tax assets, net $ 66,031 $ 62,308 Prepaid expenses 89,784 80,888 Debt issuance costs, net 10,670 6,611 Deposits 48,296 40,893 Restricted cash 11,265 9,706 Derivative instruments 4,110 15,907 Other assets 11,594 9,985 Total other assets $ 241,750 $ 226,298
Accounts Payable and Accrued Expenses	Accounts payable and accrued expenses consisted of the following as of December 31 (in thousands): 2017 2016 Accounts payable $ 101,744 $ 60,211 Accrued compensation and benefits 214,585 172,808 Accrued interest 100,347 95,832 Accrued taxes (1) 130,272 133,562 Accrued utilities and security 68,916 44,202 Accrued professional fees 13,830 14,071 Accrued repairs and maintenance 11,232 5,430 Accrued other 78,331 55,623 Total accounts payable and accrued expenses $ 719,257 $ 581,739 __________________________ (1) Includes income taxes payable of $56.4 million and $44.0 million , respectively, as of December 31, 2017 and 2016 .
Other Current Liabilities	Other current liabilities consisted of the following as of December 31 (in thousands): 2017 2016 Deferred installation revenue $ 74,452 $ 61,399 Customer deposits 16,598 13,894 Derivative instruments 34,466 10,819 Deferred recurring revenue 12,848 18,704 Deferred rent 6,546 4,158 Dividends payable 11,181 11,999 Asset retirement obligations 1,716 10,036 Other current liabilities 2,107 2,131 Total other current liabilities $ 159,914 $ 133,140
Other Liabilities	Other liabilities consisted of the following as of December 31 (in thousands): 2017 2016 Asset retirement obligations $ 96,823 $ 92,979 Deferred tax liabilities, net 252,287 274,341 Deferred installation revenue 117,021 96,744 Deferred rent 97,782 76,566 Accrued taxes 64,378 56,208 Dividends payable 6,669 8,495 Customer deposits 10,849 4,773 Deferred recurring revenue 4,236 2,681 Derivative instruments 6,381 140 Other liabilities 5,284 10,321 Total other liabilities $ 661,710 $ 623,248
Summary of Asset Retirement Obligation Liability	The following table summarizes the activities of the Company’s asset retirement obligation ("ARO") (in thousands): Asset retirement obligations as of December 31, 2014 $ 64,858 Additions 17,337 Adjustments (1) (4,676 ) Accretion expense 3,349 Impact of foreign currency exchange (2,386 ) Asset retirement obligations as of December 31, 2015 78,482 Additions 22,955 Adjustments (1) (2,366 ) Accretion expense 6,685 Impact of foreign currency exchange (2,741 ) Asset retirement obligations as of December 31, 2016 103,015 Additions 17,736 Adjustments (1) (34,576 ) Accretion expense 7,335 Impact of foreign currency exchange 5,029 Asset retirement obligations as of December 31, 2017 $ 98,539 __________________________ (1) The ARO adjustments are primarily due to lease amendments, acquisition of real estate assets and other adjustments.

Derivatives and Hedging Instr34

Derivatives and Hedging Instruments (Tables)	12 Months Ended
	Dec. 31, 2017
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Summary of cash flow hedge instruments	As of December 31, 2017 , the Company's cash flow hedge instruments had maturity dates ranging from January 2018 to October 2019 as f ollows (in thousands): Notional Amount Fair Value (1) Accumulated Other Comprehensive Income (Loss) (2)(3) Derivative assets $ 72,262 $ 2,379 $ 2,055 Derivative liabilities 440,637 (29,777 ) (34,311 ) $ 512,899 $ (27,398 ) $ (32,256 ) __________________________ (1) All derivative assets related to cash flow hedges are included in the consolidated balance sheets within other current assets, other assets, other current liabilities and other liabilities. (2) Included in the consolidated balance sheets within accumulated other comprehensive income (loss). (3) The Company recorded a net loss of $26.7 million within accumulated other comprehensive income (loss) relating to cash flow hedges that will be reclassified to revenue and expenses as they mature over the next 12 months. As of December 31, 2016 , the Company's cash flow hedge instruments had maturity dates ranging from January 2017 to November 2018 as follows (in thousands): Notional Amount Fair Value (1) Accumulated Other Comprehensive Income (Loss) (2)(3) Derivative assets $ 545,638 $ 44,570 $ 42,634 Derivative liabilities 42,207 (1,815 ) (1,453 ) $ 587,845 $ 42,755 $ 41,181 __________________________ (1) All derivative assets related to cash flow hedges are included in the consolidated balance sheets within other current assets, other assets, other current liabilities and other liabilities. (2) Included in the consolidated balance sheets within accumulated other comprehensive income (loss). (3) The Company recorded a net gain of $31.9 million within accumulated other comprehensive income (loss) relating to cash flow hedges that will be reclassified to revenue and expenses as they mature over the next 12 months.
Schedule of fair value of derivative instruments Recognized in consolidated balance sheets	The following table presents the fair value of derivative instruments recognized in the Company’s consolidated balance sheets as of December 31, 2017 (in thousands): Gross Amounts Gross Amounts Offset in the Consolidated Balance Sheet Net Consolidated Balance Sheet Amounts (1) Gross Amounts not Offset in the Consolidated Balance Sheet (2) Net Assets: Designated as hedging instruments: Foreign currency forward contracts designated as cash flow hedges $ 2,379 $ — $ 2,379 $ (2,379 ) $ — Not designated as hedging instruments: Embedded derivatives 5,076 — 5,076 — 5,076 Economic hedges of embedded derivatives 325 — 325 — 325 Foreign currency forward contracts 505 — 505 (340 ) 165 5,906 — 5,906 (340 ) 5,566 Additional netting benefit — — — (490 ) (490 ) $ 8,285 $ — $ 8,285 $ (3,209 ) $ 5,076 Liabilities: Designated as hedging instruments: Foreign currency forward contracts designated as cash flow hedges $ 29,777 $ — $ 29,777 $ (2,379 ) $ 27,398 Not designated as hedging instruments: Embedded derivatives 3,503 — 3,503 — 3,503 Economic hedges of embedded derivatives 20 — 20 — 20 Foreign currency forward contracts 7,547 — 7,547 (340 ) 7,207 11,070 — 11,070 (340 ) 10,730 Additional netting benefit — — — (490 ) (490 ) $ 40,847 $ — $ 40,847 $ (3,209 ) $ 37,638 _______________________ (1) As presented in the Company’s consolidated balance sheets within other current assets, other assets, other current liabilities and other liabilities. (2) The Company enters into master netting agreements with its counterparties for transactions other than embedded derivatives to mitigate credit risk exposure to any single counterparty. Master netting agreements allow for individual derivative contracts with a single counterparty to offset in the event of default. For presentation on the consolidated balance sheets, the Company does not offset fair value amounts recognized for derivative instruments under master netting arrangements. The following table presents the fair value of derivative instruments recognized in the Company’s consolidated balance sheets as of December 31, 2016 (in thousands): Gross Amounts Gross Amounts Offset in the Consolidated Balance Sheet Net Consolidated Balance Sheet Amounts (1) Gross Amounts not Offset in the Consolidated Balance Sheet (2) Net Assets: Designated as hedging instruments: Cash flow hedges Foreign currency forward and option contracts $ 44,570 $ — $ 44,570 $ (1,815 ) $ 42,755 Net investment hedges Foreign currency forward contracts 6,930 — 6,930 (3,310 ) 3,620 51,500 — 51,500 (5,125 ) 46,375 Not designated as hedging instruments: Embedded derivatives 9,745 — 9,745 — 9,745 Foreign currency forward contracts 8,734 — 8,734 (1,873 ) 6,861 18,479 — 18,479 (1,873 ) 16,606 Additional netting benefit — — — (2,436 ) (2,436 ) $ 69,979 $ — $ 69,979 $ (9,434 ) $ 60,545 Liabilities: Designated as hedging instruments: Cash flow hedges Foreign currency forward and option contracts $ 1,815 $ — $ 1,815 $ (1,815 ) $ — Net investment hedges Foreign currency forward contracts 3,525 — 3,525 (3,310 ) 215 5,340 — 5,340 (5,125 ) 215 Not designated as hedging instruments: Embedded derivatives 1,525 — 1,525 — 1,525 Economic hedges of embedded derivatives 866 — 866 — 866 Foreign currency forward contracts 3,228 — 3,228 (1,873 ) 1,355 5,619 — 5,619 (1,873 ) 3,746 Additional netting benefit — — — (2,436 ) (2,436 ) $ 10,959 $ — $ 10,959 $ (9,434 ) $ 1,525 _________________________ (1) As presented in the Company’s consolidated balance sheets within other current assets, other assets, other current liabilities and other liabilities. (2) The Company enters into master netting agreements with its counterparties for transactions other than embedded derivatives to mitigate credit risk exposure to any single counterparty. Master netting agreements allow for individual derivative contracts with a single counterparty to offset in the event of default. For presentation on the consolidated balance sheets, the Company does not offset fair value amounts recognized for derivative instruments under master netting arrangements.

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	12 Months Ended
	Dec. 31, 2017
Fair Value Disclosures [Abstract]
Financial assets and liabilities measured at fair value on recurring basis	The Company’s financial assets and liabilities measured at fair value on a recurring basis as of December 31, 2017 were as follows (in thousands): Fair Value at December 31, Fair Value Measurement Using 2017 Level 1 Level 2 Assets: Cash $ 985,382 $ 985,382 $ — Money market and deposit accounts 427,135 427,135 — Publicly traded equity securities 6,163 6,163 — Certificates of deposit 31,351 — 31,351 Derivative instruments (1) 8,285 — 8,285 $ 1,458,316 $ 1,418,680 $ 39,636 Liabilities: Derivative instruments (1) $ 40,847 $ — $ 40,847 _________________________ (1) Includes both foreign currency embedded derivatives and foreign currency forward and option contracts. Amounts are included within other current assets, other assets, other current liabilities and other liabilities in the Company’s consolidated balance sheet. The Company’s financial assets and liabilities measured at fair value on a recurring basis at December 31, 2016 were as follows (in thousands): Fair Value at December 31, Fair Value Measurement Using 2016 Level 1 Level 2 Assets: Cash $ 345,119 $ 345,119 $ — Money market and deposit accounts 400,388 400,388 — Publicly traded equity securities 6,463 6,463 — Certificates of deposit 9,957 — 9,957 Derivative instruments (1) 69,979 — 69,979 $ 831,906 $ 751,970 $ 79,936 Liabilities: Derivative instruments (1) $ 10,959 $ — $ 10,959 _________________________ (1) Includes embedded derivatives, foreign currency embedded derivatives and foreign currency forward contracts. Amounts are included within other current assets, other assets, other current liabilities and other liabilities in the Company’s consolidated balance sheet.

Leases (Tables)

Leases (Tables)	12 Months Ended
	Dec. 31, 2017
Leases [Abstract]
Summary of capital lease and other financing obligations	The Company’s capital lease and other financing obligations are summarized as follows as of December 31, 2017 (in thousands): Capital Lease Obligations Other Financing Obligations Total 2018 $ 100,815 $ 101,095 $ 201,910 2019 94,234 88,028 182,262 2020 94,327 87,758 182,085 2021 92,455 89,595 182,050 2022 92,309 90,070 182,379 Thereafter 801,237 886,277 1,687,514 Total minimum lease payments 1,275,377 1,342,823 2,618,200 Plus amount representing residual property value — 545,656 545,656 Less amount representing interest (531,820 ) (933,075 ) (1,464,895 ) Present value of net minimum lease payments 743,557 955,404 1,698,961 Less current portion (41,117 ) (37,588 ) (78,705 ) $ 702,440 $ 917,816 $ 1,620,256
Schedule of minimum future operating lease payments	Minimum future operating lease payments as of December 31, 2017 are summarized as follows (in thousands): Years ending: 2018 $ 176,789 2019 164,711 2020 154,329 2021 144,706 2022 140,451 Thereafter 1,132,964 Total $ 1,913,950

Debt Facilities (Tables)

Debt Facilities (Tables)	12 Months Ended
	Dec. 31, 2017
Debt Disclosure [Abstract]
Summary of Debt	The Company’s senior notes consisted of the following as of December 31 (in thousands): 2017 2016 Amount Effective Rate Amount Effective Rate 4.875% Senior Notes due 2020 $ — — $ 500,000 5.07 % 5.375% Senior Notes due 2022 750,000 5.56 % 750,000 5.56 % 5.375% Senior Notes due 2023 1,000,000 5.51 % 1,000,000 5.51 % 5.75% Senior Notes due 2025 500,000 5.88 % 500,000 5.88 % 2.875% Euro Senior Notes due 2025 1,201,000 3.04 % — — 5.875% Senior Notes due 2026 1,100,000 6.03 % 1,100,000 6.03 % 2.875% Euro Senior Notes due 2026 1,201,000 3.04 % — — 5.375% Senior Notes due 2027 1,250,000 5.51 % — — 7,002,000 3,850,000 Less amount representing debt issuance cost (78,151 ) (39,230 ) $ 6,923,849 $ 3,810,770 The Company’s mortgage and loans payable consisted of the following as of December 31 (in thousands): 2017 2016 Term loans $ 1,417,352 $ 1,413,582 Mortgage payable and other loans payable 48,872 44,382 1,466,224 1,457,964 Less the amount representing debt discount and debt issuance cost (10,666 ) (22,811 ) Add the amount representing mortgage premium 2,051 1,862 1,457,609 1,437,015 Less current portion (64,491 ) (67,928 ) $ 1,393,118 $ 1,369,087
Schedule of Interest Charges Incurred	The following table sets forth total interest expense recognized related to the 4.75% Convertible Subordinated Notes for the years ended December 31 (in thousands): 2016 Contractual interest expense $ 3,267 Amortization of debt issuance costs 186 Amortization of debt discount 3,775 $ 7,228 Effective interest rate of the liability component 10.48 % The following table sets forth total interest costs incurred and total interest costs capitalized for the years ended December 31 (in thousands): 2017 2016 2015 Interest expense $ 478,698 $ 392,156 $ 299,055 Interest capitalized 22,625 13,338 10,943 Interest charges incurred $ 501,323 $ 405,494 $ 309,998
Optional Redemption Schedule	Senior Note Description Early Equity Redemption Price First Scheduled Redemption Date First Scheduled Redemption Price Second Year Redemption Price Third Year Redemption Price Fourth Year (if scheduled) Redemption Price 5.375% due 2022 105.375% January 1, 2018 104.031% 102.688% 101.344% 100.000% 5.375% due 2023 105.375% April 1, 2018 102.688% 101.792% 100.896% 100.000% 5.75% due 2025 105.750% January 1, 2020 102.875% 101.917% 100.958% 100.000% 2.875% Euro due 2025 102.875% October 1, 2020 101.438% 100.719% 100.000% 5.875% due 2026 105.875% January 15, 2021 102.938% 101.958% 100.979% 100.000% 2.875% Euro due 2026 102.875% February 1, 2021 101.438% 100.719% 100.000% 5.375% due 2027 105.375% May 15, 2022 102.688% 101.792% 100.896% 100.000%
Summary of Maturities of Debt Facilities	The following table sets forth maturities of the Company’s debt, including mortgage, loans payable, and senior notes, gross of debt issuance costs and debt discounts, as of December 31, 2017 (in thousands): Years ending: 2018 $ 64,472 2019 77,309 2020 77,237 2021 387,762 2022 1,607,402 Thereafter 6,256,093 $ 8,470,275
Fair Value of Debt Facilities	The following table sets forth the estimated fair values of the Company’s mortgage and loans payable and senior notes, including current maturities, as of December 31 (in thousands): 2017 2016 Mortgage and loans payable $ 1,464,877 $ 1,461,954 Senior notes 7,288,673 4,033,985

Stockholders' Equity (Tables)

Stockholders' Equity (Tables)	12 Months Ended
	Dec. 31, 2017
Equity [Abstract]
Schedule of reserve for authorized but unissued shares of common stock	As of December 31, 2017 , the Company had reserved the following shares of authorized but unissued shares of common stock for future issuances: Common stock options and restricted stock units 4,499,389 Common stock employee purchase plans 3,265,791 Total 7,765,180
Components of Accumulated Other Comprehensive Loss	The components of the Company’s accumulated other comprehensive loss (OCI) consisted of the following as of December 31, 2017 , 2016 and 2015 (in thousands): December 31, 2014 Net December 31, 2015 Net December 31, 2016 Net December 31, 2017 Foreign currency translation adjustment ("CTA") loss $ (336,946 ) $ (186,763 ) $ (523,709 ) $ (507,420 ) $ (1,031,129 ) $ 454,269 $ (576,860 ) Unrealized gain (loss) on cash flow hedges (1) 6,603 4,550 11,153 19,551 30,704 (54,895 ) (24,191 ) Net investment hedge CTA gain (loss) (1) — 4,484 4,484 45,505 49,989 (235,292 ) (185,303 ) Unrealized gain (loss) on available for sale securities (2) (99 ) (40 ) (139 ) 2,249 2,110 14 2,124 Net actuarial loss on defined benefit plans (3) (2,001 ) 1,153 (848 ) 32 (816 ) (143 ) (959 ) $ (332,443 ) $ (176,616 ) $ (509,059 ) $ (440,083 ) $ (949,142 ) $ 163,953 $ (785,189 ) __________________________ (1) Refer to Note 7 for a discussion of the amounts reclassified from accumulated other comprehensive loss to net income (loss). (2) The realized gains and losses reclassified from accumulated other comprehensive loss to net income (loss) as a result of sale of available for sale securities were not significant for the years ended December 31, 2017 , 2016 and 2015. (3) The Company has a defined benefit pension plan covering all employees in one country where such plans are mandated by law. The Company does not have any defined benefit plans in any other countries. The unamortized gain (loss) on defined benefit plans includes gains or losses resulting from a change in the value of either the projected benefit obligation or the plan assets resulting from a change in an actuarial assumption, net of amortization.
Quarterly dividend and special distributions	For the years ended December 31, 2017 and 2016 , the quarterly dividends were classified as follows: Record Date Payment Date Total Distribution Nonqualified Ordinary Dividend Qualified Ordinary Dividend Return of Capital (per share) Fiscal 2017 2/27/2017 3/22/2017 $ 2.000000 $ 2.000000 $ — $ — 5/24/2017 6/21/2017 2.000000 2.000000 — — 8/23/2017 9/20/2017 2.000000 2.000000 — — 11/15/2017 12/13/2017 2.000000 2.000000 — — Total $ 8.000000 $ 8.000000 $ — $ — Fiscal 2016 3/9/2016 3/23/2016 $ 1.750000 $ 1.231334 $ 0.518666 $ — 5/25/2016 6/15/2016 1.750000 1.231334 0.518666 — 8/24/2016 9/14/2016 1.750000 1.231334 0.518666 — 11/16/2016 12/14/2016 1.750000 1.231334 0.518666 — Total $ 7.000000 $ 4.925336 $ 2.074664 $ —

Stock-Based Compensation (Table

Stock-Based Compensation (Tables)	12 Months Ended
	Dec. 31, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Summary of Stock Option Activity	Stock option activity under the Equity Compensation Plans is summarized as follows: Number of Shares Outstanding Weighted Average Exercise Price per Share Weighted Average Remaining Contractual Life (Years) Aggregate (1) Stock options outstanding at December 31, 2014 77,934 $ 73.84 Stock options exercised (41,889 ) 64.18 Additional shares granted due to special distribution 1,454 — Stock options expired (250 ) 41.12 Stock options outstanding at December 31, 2015 37,249 82.06 Stock options exercised (18,183 ) 80.10 Stock options outstanding at December 31, 2016 19,066 82.01 Stock options exercised (12,763 ) 83.51 Stock options outstanding at December 31, 2017 6,303 $ 78.97 0.57 $ 2,359 Stock options vested and exercisable at December 31, 2017 6,303 $ 78.97 0.57 $ 2,359 __________________________ (1) The aggregate intrinsic value is calculated as the difference between the market value of the stock as of December 31, 2017 and the exercise price of the option.
Schedule of Outstanding Stock Options	The following table summarizes information about outstanding stock options as of December 31, 2017 : Outstanding Exercisable Range of exercise prices Number of Shares Weighted Average Remaining Contractual Life (Years) Weighted Average Exercise Price Number of Shares Weighted Average Exercise Price $28.56 to $28.56 1,007 1.18 $ 28.56 1,007 $ 28.56 $88.56 to $88.56 5,296 0.45 88.56 5,296 88.56 6,303 0.57 $ 78.97 6,303 $ 78.97
Schedule of Additional Disclosure for Stock Options	The Company provides the following additional disclosures for stock options as of December 31 (in thousands): 2017 2016 2015 Total aggregate intrinsic value of stock options exercised (1) $ 3,818 $ 4,712 $ 7,198 _________________________ (1) The intrinsic value is calculated as the difference between the market value of the stock on the date of exercise and the exercise price of the option.
Summary of Restricted Stock Unit Activity	Restricted stock unit activity is summarized as follows: Number of Shares Outstanding Weighted Average Grant Date Fair Value per Share Weighted Average Remaining Contractual Life (Years) Aggregate Intrinsic Value (1) (Dollars in Thousands) Restricted stock units outstanding, December 31, 2014 1,403,974 $ 114.56 Restricted stock units granted 711,990 236.89 Additional shares granted due to special distribution 51,432 297.03 Restricted stock units released, vested (623,554 ) 173.79 Special distribution shares released (19,966 ) 227.99 Restricted stock units canceled (103,922 ) 198.67 Special distribution shares canceled (3,516 ) 235.43 Restricted stock units outstanding, December 31, 2015 1,416,438 148.53 Restricted stock units granted 720,601 309.18 Additional shares granted due to special distribution 37 297.03 Restricted stock units released, vested (655,584 ) 213.72 Special distribution shares released (35,354 ) 269.94 Restricted stock units canceled (93,940 ) 242.41 Special distribution shares canceled (4,319 ) 272.84 Restricted stock units outstanding, December 31, 2016 1,347,879 192.59 Restricted stock units granted 658,196 389.60 Restricted stock units released, vested (606,064 ) 260.75 Special distribution shares released (15,667 ) 243.06 Restricted stock units canceled (79,451 ) 313.83 Special distribution shares canceled (1,002 ) 282.49 Restricted stock units outstanding, December 31, 2017 1,303,891 $ 252.30 1.22 $ 590,950 __________________________ (1) The intrinsic value is calculated based on the market value of the stock as of December 31, 2017 .
Disclosures for 2004 Purchase Plan	The Company provides the following disclosures for the 2004 Purchase Plan as of December 31 (dollars, except shares): 2017 2016 2015 Weighted-average purchase price per share $ 250.65 $ 217.91 $ 150.13 Weighted average grant-date fair value per share of shares purchased $ 72.21 $ 60.49 $ 57.63 Number of shares purchased 162,076 150,044 182,175
Assumptions in Computation of Fair Value	The Company uses the Black-Scholes option-pricing model to determine the fair value of shares under the 2004 Purchase Plan with the following assumptions during the years ended December 31: 2017 2016 2015 Range of dividend yield 2.10 - 2.31% 2.38 - 2.53% 2.65 - 2.81% Range of risk-free interest rate 0.70 - 1.35% 0.48 - 0.76% 0.08 - 0.77% Range of expected volatility 16.42 - 24.27% 18.80 - 30.94% 19.96 - 25.78% Weighted-average expected volatility 20.30 % 25.01 % 21.72 % Weighted average expected life (in years) 1.52 1.41 1.59
Schedule of Allocated Share-based Compensation	The following table presents, by operating expense, the Company’s stock-based compensation expense recognized in the Company’s consolidated statement of operations for the years ended December 31 (in thousands): 2017 2016 2015 Cost of revenues $ 13,621 $ 13,086 $ 9,878 Sales and marketing 50,094 43,030 36,847 General and administrative 111,785 100,032 86,908 Total $ 175,500 $ 156,148 $ 133,633
Schedule of Share-based Compensation by Plan	The Company’s stock-based compensation recognized in the consolidated statement of operations was comprised of the following types of equity awards for the years ended December 31 (in thousands): 2017 2016 2015 Stock options $ — $ — $ 1,679 Restricted stock units 164,321 145,769 124,512 Employee stock purchase plan 11,179 10,379 7,442 Total $ 175,500 $ 156,148 $ 133,633

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Income (loss) from continuing operations before income taxes attributable to geographic locations	Income (loss) before income taxes is attributable to the following geographic locations for the years ended December 31, (in thousands): 2017 2016 2015 Domestic $ 148,500 $ 215,010 $ 123,153 Foreign 138,332 (55,151 ) 87,845 Income from continuing operations before income taxes $ 286,832 $ 159,859 $ 210,998
Components of tax benefit (expenses) for income taxes from continuing operations	The tax benefit (expenses) for income taxes consisted of the following components for the years ended December 31, (in thousands): 2017 2016 2015 Current: Federal $ 9,346 $ (16,365 ) $ (85,352 ) State and local (849 ) (2,147 ) (3,984 ) Foreign (109,032 ) (62,278 ) (27,090 ) Subtotal (100,535 ) (80,790 ) (116,426 ) Deferred: Federal 9,684 (11,184 ) 87,801 State and local 2,018 (3,328 ) 4,600 Foreign 34,983 49,851 801 Subtotal 46,685 35,339 93,202 Provision for income taxes $ (53,850 ) $ (45,451 ) $ (23,224 )
Income tax reconciliation	The fiscal 2017 , 2016 and 2015 income tax expense differed from the amounts computed by applying the U.S. federal income tax rate of 35% to pre-tax income as a result of the following for the years ended December 31 (in thousands): 2017 2016 2015 Federal tax at statutory rate $ (100,391 ) $ (55,951 ) $ (73,849 ) State and local tax (expense) benefit 1,000 (4,895 ) 945 Deferred tax assets generated in current year not benefited (7,643 ) (6,246 ) (4,916 ) Foreign income tax rate differential 26,151 22,016 30,387 Non-deductible expenses (2,629 ) (15,828 ) (14,252 ) Stock-based compensation expense (616 ) (5,890 ) (3,922 ) Change in valuation allowance (716 ) 11,995 710 Foreign financing activities 1,319 (26,708 ) 2,592 Loss on debt extinguishment (1,604 ) (8,288 ) — Gain on divestments — 8,828 — Uncertain tax positions reserve (66 ) (9,371 ) (3,191 ) Tax adjustments related to REIT 41,973 45,060 45,823 Enactment of the US tax reform (6,513 ) — — Other, net (4,115 ) (173 ) (3,551 ) Total income tax expense $ (53,850 ) $ (45,451 ) $ (23,224 )
Schedule of deferred tax assets and liabilities	The types of temporary differences that give rise to significant portions of the Company’s deferred tax assets and liabilities are set out below as of December 31 (in thousands): 2017 2016 Deferred tax assets: Reserves and accruals $ 27,673 $ 11,276 Stock-based compensation expense 1,960 1,752 Unrealized losses 10,768 — Operating loss carryforwards 95,864 37,594 Others, net — 5 Gross deferred tax assets 136,265 50,627 Valuation allowance (84,573 ) (29,167 ) Total deferred tax assets, net 51,692 21,460 Deferred tax liabilities: Property, plant and equipment (65,825 ) (57,006 ) Unrealized gains — (7,832 ) Intangible assets (172,123 ) (168,655 ) Total deferred tax liabilities (237,948 ) (233,493 ) Net deferred tax liabilities $ (186,256 ) $ (212,033 )
Changes in valuation allowance for deferred tax assets	Changes in the valuation allowance for deferred tax assets for the years ended December 31, 2017 , 2016 and 2015 are as follows (in thousands): 2017 2016 2015 Beginning balance $ 29,167 $ 29,894 $ 27,181 Amounts from acquisitions 25,283 5,053 — Amounts recognized into income 716 (11,995 ) (710 ) Current increase 28,431 6,557 4,513 Impact of foreign currency exchange 976 (342 ) (1,090 ) Ending balance $ 84,573 $ 29,167 $ 29,894
Schedule of net operating loss carryforwards	The Company’s NOL carryforwards for federal, state and foreign tax purposes which expire, if not utilized, at various intervals from 2018, are outlined below (in thousands): Expiration Date Federal (1) State (1) Foreign Total 2018 $ — $ — $ 11,730 $ 11,730 2019 to 2021 190,125 474 16,638 207,237 2022 to 2024 46,827 — 4,294 51,121 2025 to 2027 13,005 — 9,425 22,430 2031 to 2033 — 767 — 767 Thereafter 61,375 18,909 242,382 322,666 $ 311,332 $ 20,150 $ 284,469 $ 615,951 __________________________ (1) The total amount of NOL carryforwards that will not be available to offset the Company’s future taxable income after dividend paid deduction due to Section 382 limitations was $242.0 million , comprising $241.8 million of federal and $0.2 million of state.
Reconciliation of unrecognized tax benefits	The beginning and ending balances of the Company's unrecognized tax benefits are reconciled below for the years ended December 31 (in thousands): 2017 2016 2015 Beginning balance $ 72,187 $ 30,845 $ 36,138 Gross increases related to prior year tax positions 6,095 570 — Gross decreases related to prior year tax positions — — (8,645 ) Gross increases related to current year tax positions 19,832 41,972 4,802 Decreases resulting from expiration of statute of limitation (15,410 ) (826 ) (1,450 ) Decreases resulting from settlements (314 ) (374 ) — Ending balance $ 82,390 $ 72,187 $ 30,845

Related Party Transactions (Tab

Related Party Transactions (Tables)	12 Months Ended
	Dec. 31, 2017
Related Party Transactions [Abstract]
Activity of related party transactions	The Company’s activity of related party transactions was as follows (in thousands): Years ended December 31, 2017 2016 2015 Revenues $ 13,726 $ 11,822 $ 10,745 Costs and services 11,211 14,574 10,808 As of December 31, 2017 2016 Accounts receivable $ 1,321 $ 1,109 Accounts payable 744 1,720

Segment Information (Tables)

Segment Information (Tables)	12 Months Ended
	Dec. 31, 2017
Segment Reporting [Abstract]
Schedule of adjusted EBITDA	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
Segment disclosures	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 __________________________ (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 .
Long-lived assets	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 _________________________ (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
Revenue information by category	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

Quarterly Financial Informati43

Quarterly Financial Information (Unaudited) (Tables)	12 Months Ended
	Dec. 31, 2017
Quarterly Financial Information Disclosure [Abstract]
Quarterly information	The following tables present selected quarterly information (in thousands, except per share data): 2017 Quarters Ended March 31 June 30 September 30 December 31 Revenues $ 949,525 $ 1,066,421 $ 1,152,261 $ 1,200,221 Gross profit 480,564 544,218 569,901 580,596 Net income 42,062 45,805 79,900 65,215 EPS Basic EPS 0.58 0.59 1.02 0.83 Diluted EPS 0.57 0.58 1.02 0.82 2016 Quarters Ended March 31 June 30 September 30 December 31 Revenues $ 844,156 $ 900,510 $ 924,676 $ 942,647 Gross profit 416,476 443,543 454,374 476,726 Net income (loss) (31,111 ) 44,711 51,450 61,750 EPS Basic EPS (0.46 ) 0.64 0.73 0.86 Diluted EPS (0.46 ) 0.64 0.72 0.86

Nature of Business and Summar44

Nature of Business and Summary of Significant Accounting Policies - Additional Information (Detail)	3 Months Ended	12 Months Ended
	Sep. 30, 2016USD ($)	Dec. 31, 2017USD ($)service_providersmarketreporting_unitdata_centercontinent	Dec. 31, 2016USD ($)	Dec. 31, 2015USD ($)	Dec. 31, 2018USD ($)	May 01, 2017data_center_building	Jan. 01, 2017USD ($)	Jun. 30, 2016
Item Effected [Line Items]
Number of network providers that provide internet access | service_providers		1,700
Data centers sites | data_center		190
Number of markets data center operates in | market		48
Data centers operates In number of continents | continent		5
Cash equivalents maturity period (in days)		90 days
A single customer is accounted for a percentage of accounts receivable or revenues for a period		10.00%	10.00%	10.00%
Impairment charges	$ 7,700,000	$ 0	$ 7,698,000	$ 0
Number of reporting units | reporting_unit		3
Impairment charges, intangible assets		$ 0	0	0
Percentage of recurring revenue		90.00%
Equity awards vesting period (in years)		4 years
Excess tax benefit, amount			$ 2,800,000	$ 30,000
4.75% convertible subordinated notes
Item Effected [Line Items]
Interest rate (percent)		4.75%	4.75%	4.75%				4.75%
Property, plant and equipment
Item Effected [Line Items]
Impairment charge		$ 0	$ 0	$ 0
Minimum
Item Effected [Line Items]
Short term investment maturity (in days and years)		90 days
Maximum
Item Effected [Line Items]
Short term investment maturity (in days and years)		1 year
Executives | Minimum
Item Effected [Line Items]
Equity awards vesting period (in years)		2 years
Executives | Maximum
Item Effected [Line Items]
Equity awards vesting period (in years)		4 years
Verizon
Item Effected [Line Items]
Data center buildings | data_center_building						29
Accounting Standards Update 2016-18 | Restatement Adjustment
Item Effected [Line Items]
Increase (decrease) in restricted cash			$ 453,500,000	$ (497,100,000)
Retained Earnings (Accumulated Deficit) | Accounting Standards Update 2014-09 | Forecast | Minimum
Item Effected [Line Items]
Cumulative effect of new accounting principle, in period of adoption					$ 267,000,000
Retained Earnings (Accumulated Deficit) | Accounting Standards Update 2014-09 | Forecast | Maximum
Item Effected [Line Items]
Cumulative effect of new accounting principle, in period of adoption					$ 307,000,000
New Accounting Pronouncement, Early Adoption, Effect | Retained Earnings (Accumulated Deficit) | Accounting Standards Update 2016-09
Item Effected [Line Items]
Cumulative effect of new accounting principle, in period of adoption							$ 1,100,000

Nature of Business and Summar45

Nature of Business and Summary of Significant Accounting Policies - Schedule of Revenue by Geographical Region (Detail) - Geographic concentration risk - Sales	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Americas
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items]
Percentages of revenue by geographic regions	50.00%	47.00%	55.00%
EMEA
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items]
Percentages of revenue by geographic regions	31.00%	32.00%	26.00%
Asia-Pacific
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items]
Percentages of revenue by geographic regions	19.00%	21.00%	19.00%

Nature of Business and Summar46

Nature of Business and Summary of Significant Accounting Policies - Estimated Useful Lives of Property, Plant and Equipment (Detail)	12 Months Ended
	Dec. 31, 2017
Core systems | Minimum
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items]
Estimated useful life, in years	3 years
Core systems | Maximum
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items]
Estimated useful life, in years	25 years
Buildings | Minimum
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items]
Estimated useful life, in years	12 years
Buildings | Maximum
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items]
Estimated useful life, in years	50 years
Leasehold improvements | Minimum
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items]
Estimated useful life, in years	12 years
Leasehold improvements | Maximum
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items]
Estimated useful life, in years	40 years
Personal property | Minimum
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items]
Estimated useful life, in years	3 years
Personal property | Maximum
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items]
Estimated useful life, in years	10 years

Acquisitions - Additional Infor

Acquisitions - Additional Information (Detail) ¥ / shares in Units, £ / shares in Units, $ in Thousands, € in Millions, ¥ in Millions, £ in Millions, AUD in Millions	Dec. 15, 2017AUD	Dec. 15, 2017USD ($)	Oct. 09, 2017EUR (€)	Oct. 09, 2017USD ($)	Oct. 06, 2017USD ($)	May 01, 2017USD ($)data_center_building	Feb. 03, 2017USD ($)	Aug. 01, 2016EUR (€)	Aug. 01, 2016USD ($)	Jan. 15, 2016GBP (£)£ / shares	Jan. 15, 2016USD ($)	Nov. 02, 2015JPY (¥)¥ / shares	Nov. 02, 2015USD ($)	Jan. 14, 2015USD ($)	Oct. 31, 2016	Dec. 31, 2017USD ($)metro_areadata_center	Sep. 30, 2017USD ($)	Jun. 30, 2017USD ($)	Mar. 31, 2017USD ($)	Dec. 31, 2016USD ($)	Sep. 30, 2016USD ($)	Jun. 30, 2016USD ($)	Mar. 31, 2016USD ($)	Dec. 31, 2016USD ($)	Dec. 31, 2017USD ($)metro_areadata_center	Sep. 30, 2017USD ($)	Dec. 31, 2017USD ($)metro_areadata_center	Dec. 31, 2016USD ($)	Dec. 31, 2016USD ($)	Dec. 31, 2015USD ($)	Dec. 06, 2016USD ($)	Oct. 30, 2016JPY (¥)	Dec. 31, 2015GBP (£)	Dec. 31, 2015USD ($)	Nov. 02, 2015USD ($)	Sep. 30, 2015JPY (¥)	Sep. 30, 2015USD ($)
Business Acquisition [Line Items]
Data centers sites | data_center																190									190		190
Revenues																											$ 4,368,428	$ 3,611,989		$ 2,725,867
Net income																$ 65,215	$ 79,900	$ 45,805	$ 42,062	$ 61,750	$ 51,450	$ 44,711	$ (31,111)				232,982	126,800		187,774
Repayment of capital lease and other financing obligations																											93,470	114,385		28,663
Loss on debt extinguishment																											(65,772)	(12,276)		(289)
Long term debt, gross																1,466,224				1,457,964				$ 1,457,964	$ 1,466,224		1,466,224	1,457,964	$ 1,457,964
Goodwill																$ 4,411,762				2,986,064				2,986,064	4,411,762		4,411,762	2,986,064	2,986,064					$ 1,063,200
Metronode
Business Acquisition [Line Items]
Cash consideration for acquisition	AUD 1,035	$ 791,200
Verizon
Business Acquisition [Line Items]
Cash consideration for acquisition						$ 3,600,000
Data center buildings | data_center_building						29
Acquisition costs																											28,500	7,600
Provisional information, adjustment, intangibles																											(9,000)
Provisional information, adjustment, goodwill																											$ 7,700
Revenues																									359,100
Net income																									$ 87,800
Goodwill						$ 1,095,262
Verizon | Customer relationships
Business Acquisition [Line Items]
Acquired intangible assets, Estimated useful lives (years)																											15 years
Itconic, Zenium and IO
Business Acquisition [Line Items]
Acquisition costs																											$ 8,100
Itconic
Business Acquisition [Line Items]
Cash consideration for acquisition			€ 220.5	$ 259,100
Data centers sites | data_center																5									5		5
Number data centers, metro areas | metro_area																4									4		4
Goodwill				$ 125,112
Itconic | Customer relationships
Business Acquisition [Line Items]
Discount rate (percent)			16.00%	16.00%
Acquired intangible assets, Estimated useful lives (years)																											15 years
Zenium data center
Business Acquisition [Line Items]
Cash consideration for acquisition					$ 92,000
Acquired intangible assets, Estimated useful lives (years)																											15 years
Goodwill					$ 23,077
IO UK's data center
Business Acquisition [Line Items]
Cash consideration for acquisition							$ 36,300
Revenues																										$ 22,400
Acquired intangible assets, Estimated useful lives (years)							10 years
Goodwill							$ 15,804
Digital Realty
Business Acquisition [Line Items]
Cash consideration for acquisition								€ 193.8	$ 216,400
Acquisition costs																												12,000
Revenues																								4,100
Repayment of capital lease and other financing obligations								47.8	53,400
Loss on debt extinguishment								€ (8.8)	(9,900)
Goodwill									$ 48,835
Digital Realty | In-place leases
Business Acquisition [Line Items]
Acquired intangible assets, Estimated useful lives (years)																											4 years 3 months 18 days
Digital Realty | Favorable leasehold interests
Business Acquisition [Line Items]
Acquired intangible assets, Estimated useful lives (years)																											5 years 3 months 18 days
Bit-isle
Business Acquisition [Line Items]
Cash consideration for acquisition												¥ 33,196	$ 275,400
Acquisition costs																														8,600
Revenues																														21,600
Net income																														(3,200)
Percentage of outstanding shares including stock options																																			97.00%
Offer price (in jpy per share) | ¥ / shares												¥ 922
Goodwill																																			$ 95,444
Bit-isle | Customer relationships
Business Acquisition [Line Items]
Discount rate (percent)												11.00%	11.00%
Acquired intangible assets, Estimated useful lives (years)												13 years	13 years
Bit-isle | Trade names
Business Acquisition [Line Items]
Discount rate (percent)												12.00%	12.00%
Acquired intangible assets, Estimated useful lives (years)												2 years	2 years
Relief of royalty rate (percent)												2.00%	2.00%
Telecity Group plc
Business Acquisition [Line Items]
Acquisition costs																												42,500		$ 38,300
Provisional information, adjustment, intangibles																							36,800
Provisional information, adjustment, goodwill																							(22,500)
Revenues																													400,000
Net income																													(47,100)
Ratio of shares acquired										0.0336	0.0336
Consideration transferred										£ 2,624.5	$ 3,743,600
Equity interests issued and issuable											1,300
Cash placed in restricted account																																	£ 322.9	475,700
Provisional information, adjustment, deferred tax liabilities																							19,500
Provisional information, adjustment, financial liabilities																							(34,400)
Provisional information, adjustment, assets held for sale																							$ (36,900)
Goodwill											$ 2,215,567
Payments to acquire businesses, per share acquired | £ / shares										£ 5.725
Telecity Group plc | Customer relationships
Business Acquisition [Line Items]
Discount rate (percent)										8.50%	8.50%
Acquired intangible assets, Estimated useful lives (years)										13 years 6 months	13 years 6 months
Telecity Group plc | Trade names
Business Acquisition [Line Items]
Discount rate (percent)										9.00%	9.00%
Acquired intangible assets, Estimated useful lives (years)										1 year 6 months	1 year 6 months
Relief of royalty rate (percent)										2.00%	2.00%
Nimbo Technologies Inc.
Business Acquisition [Line Items]
Cash consideration for acquisition														$ 10,000
Goodwill														$ 17,200
Bridge Loan | Verizon
Business Acquisition [Line Items]
Short-term debt																															$ 2,000,000
Payments of Financing Costs																												10,000
Commitment fees																											$ 7,800	2,200
Bridge Loan | Bit-isle
Business Acquisition [Line Items]
Loans payable																																				¥ 47,500	$ 395,700
Long term debt, gross | ¥																																¥ 47,500
Debt instrument, term															5 years
Bridge Loan | Telecity Group plc
Business Acquisition [Line Items]
Short-term debt																																	£ 875	$ 1,289,000
Senior Notes
Business Acquisition [Line Items]
Long term debt, gross																$ 7,002,000				3,850,000				3,850,000	$ 7,002,000		7,002,000	3,850,000	3,850,000
Senior Notes | 5.875% Senior Notes due 2026
Business Acquisition [Line Items]
Long term debt, gross																$ 1,100,000				$ 1,100,000				$ 1,100,000	$ 1,100,000		$ 1,100,000	$ 1,100,000	$ 1,100,000
Minimum | Verizon | Customer relationships
Business Acquisition [Line Items]
Discount rate (percent)						7.70%
Maximum | Verizon | Customer relationships
Business Acquisition [Line Items]
Discount rate (percent)						12.20%
Australia
Business Acquisition [Line Items]
Data centers sites | data_center																10									10		10
Number data centers, metro areas | metro_area																6									6		6

Acquisitions - Preliminary Purc

Acquisitions - Preliminary Purchase Price Allocation (Detail) - USD ($) $ in Thousands	Feb. 03, 2017	Jan. 15, 2016	Nov. 02, 2015	Dec. 31, 2017	Oct. 09, 2017	Oct. 06, 2017	May 01, 2017	Dec. 31, 2016	Aug. 01, 2016	Dec. 31, 2015
Business Acquisition [Line Items]
Goodwill				$ 4,411,762				$ 2,986,064		$ 1,063,200
Itconic
Business Acquisition [Line Items]
Cash and cash equivalents					$ 15,659
Accounts receivable					16,429
Other current assets					1,885
Property, plant and equipment					68,051
Goodwill					125,112
Intangible assets					99,993
Deferred tax assets					0
Other assets					4,025
Total assets acquired					331,154
Accounts payable and accrued liabilities					(15,846)
Other current liabilities					(12,374)
Capital lease and other financing obligations					(30,666)
Mortgage and loans payable					(3,253)
Deferred tax liabilities					(2,389)
Other liabilities					(7,515)
Net assets acquired					$ 259,111
Zenium data center
Business Acquisition [Line Items]
Cash and cash equivalents						$ 692
Accounts receivable						198
Other current assets						6,430
Property, plant and equipment						53,749
Goodwill						23,077
Intangible assets						6,400
Deferred tax assets						0
Other assets						5,494
Total assets acquired						96,040
Accounts payable and accrued liabilities						(1,012)
Other current liabilities						(451)
Capital lease and other financing obligations						0
Mortgage and loans payable						0
Deferred tax liabilities						(1,969)
Other liabilities						(614)
Net assets acquired						$ 91,994
Acquired intangible assets, Estimated useful lives (years)				15 years
IO UK's data center
Business Acquisition [Line Items]
Cash and cash equivalents	$ 1,388
Accounts receivable	7
Other current assets	1,082
Property, plant and equipment	40,251
Goodwill	15,804
Intangible assets	6,252
Deferred tax assets	6,714
Other assets	3,396
Total assets acquired	74,894
Accounts payable and accrued liabilities	(439)
Other current liabilities	(168)
Capital lease and other financing obligations	(33,091)
Mortgage and loans payable	(4,067)
Deferred tax liabilities	0
Other liabilities	(828)
Net assets acquired	$ 36,301
Acquired intangible assets, Estimated useful lives (years)	10 years
Verizon
Business Acquisition [Line Items]
Cash and cash equivalents							$ 1,073
Accounts receivable							2,019
Other current assets							7,319
Property, plant and equipment							840,335
Goodwill							1,095,262
Intangible assets							1,693,900
Total assets acquired							3,639,908
Accounts payable and accrued liabilities							(1,725)
Other current liabilities							(2,020)
Capital lease and other financing obligations							(17,659)
Deferred tax liabilities							(18,129)
Other liabilities							(5,689)
Net assets acquired							3,594,686
Digital Realty
Business Acquisition [Line Items]
Cash and cash equivalents									$ 4,073
Accounts receivable									1,507
Other current assets									794
Property, plant and equipment									143,972
Goodwill									48,835
Intangible assets									11,758
Other assets									81
Total assets acquired									211,020
Accounts payable and accrued liabilities									(2,044)
Other current liabilities									(2,798)
Deferred tax liabilities									(42,395)
Other liabilities									(755)
Net assets acquired									$ 163,028
Telecity Group plc
Business Acquisition [Line Items]
Cash and cash equivalents		$ 73,368
Accounts receivable		24,042
Other current assets		41,079
Assets held for sale		877,650
Property, plant and equipment		1,058,583
Goodwill		2,215,567
Intangible assets		694,243
Deferred tax assets		994
Other assets		4,102
Total assets acquired		4,989,628
Accounts payable and accrued liabilities		(84,367)
Accrued property, plant and equipment		(3,634)
Other current liabilities		(27,233)
Liabilities held for sale		(155,650)
Capital lease and other financing obligations		(165,365)
Mortgage and loans payable		(592,304)
Deferred tax liabilities		(176,168)
Other liabilities		(40,021)
Net assets acquired		$ 3,744,886
Bit-isle
Business Acquisition [Line Items]
Cash and cash equivalents			$ 33,198
Accounts receivable			7,359
Other current assets			51,038
Long-term investments			3,806
Property, plant and equipment			308,985
Goodwill			95,444
Intangible assets			111,374
Other assets			22,981
Total assets acquired			634,185
Accounts payable and accrued liabilities			(15,028)
Accrued property, plant and equipment			(465)
Other current liabilities			(8,689)
Capital lease and other financing obligations			(108,833)
Mortgage and loans payable			(190,227)
Deferred tax liabilities			(32,192)
Other liabilities			(3,384)
Net assets acquired			$ 275,367
Customer relationships | Itconic
Business Acquisition [Line Items]
Acquired intangible assets, Estimated useful lives (years)				15 years
Customer relationships | Verizon
Business Acquisition [Line Items]
Intangible assets							$ 245,300
Acquired intangible assets, Estimated useful lives (years)				15 years
Customer relationships | Telecity Group plc
Business Acquisition [Line Items]
Acquired intangible assets, Estimated useful lives (years)		13 years 6 months
Customer relationships | Bit-isle
Business Acquisition [Line Items]
Acquired intangible assets, Estimated useful lives (years)			13 years

Acquisitions - Acquired Identif

Acquisitions - Acquired Identifiable Intangible Assets (Detail) - USD ($) $ in Thousands	Jan. 15, 2016	Nov. 02, 2015	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Digital Realty
Business Acquisition [Line Items]
Fair value of intangible assets acquired				$ 11,758
Digital Realty | In-place leases
Business Acquisition [Line Items]
Acquired intangible assets, Estimated useful lives (years)			4 years 3 months 18 days
Telecity Group plc
Business Acquisition [Line Items]
Fair value of intangible assets acquired				$ 694,243
Telecity Group plc | Favorable leasehold interests
Business Acquisition [Line Items]
Fair value of intangible assets acquired	$ 30,254
Weighted-average estimated useful lives (years)	19 years 8 months 12 days
Telecity Group plc | Favorable leasehold interests | Minimum
Business Acquisition [Line Items]
Acquired intangible assets, Estimated useful lives (years)	2 years
Telecity Group plc | Favorable leasehold interests | Maximum
Business Acquisition [Line Items]
Acquired intangible assets, Estimated useful lives (years)	25 years 5 months
Telecity Group plc | Customer relationships
Business Acquisition [Line Items]
Fair value of intangible assets acquired	$ 591,956
Acquired intangible assets, Estimated useful lives (years)	13 years 6 months
Weighted-average estimated useful lives (years)	13 years 6 months
Telecity Group plc | Trade names
Business Acquisition [Line Items]
Fair value of intangible assets acquired	$ 72,033
Acquired intangible assets, Estimated useful lives (years)	1 year 6 months
Weighted-average estimated useful lives (years)	1 year 6 months
Bit-isle
Business Acquisition [Line Items]
Fair value of intangible assets acquired					$ 111,374
Bit-isle | Favorable leasehold interests
Business Acquisition [Line Items]
Fair value of intangible assets acquired		$ 2,410
Acquired intangible assets, Estimated useful lives (years)		18 years
Weighted-average estimated useful lives (years)		18 years
Bit-isle | Customer relationships
Business Acquisition [Line Items]
Fair value of intangible assets acquired		$ 105,434
Acquired intangible assets, Estimated useful lives (years)		13 years
Weighted-average estimated useful lives (years)		13 years
Bit-isle | Trade names
Business Acquisition [Line Items]
Fair value of intangible assets acquired		$ 3,455
Acquired intangible assets, Estimated useful lives (years)		2 years
Weighted-average estimated useful lives (years)		2 years
Bit-isle | Other intangible assets
Business Acquisition [Line Items]
Fair value of intangible assets acquired		$ 75
Acquired intangible assets, Estimated useful lives (years)		3 months
Weighted-average estimated useful lives (years)		3 months

Acquisitions - Unaudited Pro Fo

Acquisitions - Unaudited Pro Forma Combined Consolidated Statements of Operations (Detail) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Business Combinations [Abstract]
Revenues	$ 4,509,602	$ 4,053,280	$ 3,244,349
Net income from continuing operations	$ 258,618	$ 19,248	$ 141,496
Basic EPS	$ 3.31	$ 0.25	$ 2.10
Diluted EPS	$ 3.28	$ 0.25	$ 2.08

Earnings Per Share - Computatio

Earnings Per Share - Computation of Basic and Diluted Earnings Per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Earnings Per Share [Abstract]
Net income from continuing operations									$ 232,982	$ 114,408	$ 187,774
Net income from discontinued operations, net of tax									0	12,392	0
Net income	$ 65,215	$ 79,900	$ 45,805	$ 42,062	$ 61,750	$ 51,450	$ 44,711	$ (31,111)	$ 232,982	$ 126,800	$ 187,774
Weighted-average shares used to calculate basic EPS									76,854	70,117	57,790
Effect of dilutive securities:
Employee equity awards									681	699	693
Weighted-average shares used to calculate diluted EPS									77,535	70,816	58,483
Basic EPS:
Basic EPS from continuing operations (in dollars per share)									$ 3.03	$ 1.63	$ 3.25
Basic EPS of discontinued operations (in dollars per share)									0	0.18	0
Basic EPS (in dollars per share)	$ 0.83	$ 1.02	$ 0.59	$ 0.58	$ 0.86	$ 0.73	$ 0.64	$ (0.46)	3.03	1.81	3.25
Diluted EPS:
Dilutive EPS from continuing operations (in dollars per share)									3	1.62	3.21
Dilutive EPS from discontinued operations (in dollars per share)									0	0.17	0
Diluted EPS (in dollars per share)	$ 0.82	$ 1.02	$ 0.58	$ 0.57	$ 0.86	$ 0.72	$ 0.64	$ (0.46)	$ 3	$ 1.79	$ 3.21

Earnings Per Share - Anti-dilut

Earnings Per Share - Anti-dilutive Potential Shares of Common Stock Excluded from Computation of Earnings Per Share (Detail) - shares shares in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Jun. 30, 2016
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive potential shares of common stock excluded from computation of earnings per share	63	920	2,065
Shares related to the potential conversion of convertible subordinated notes
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive potential shares of common stock excluded from computation of earnings per share	0	893	1,977
Common stock related to employee equity awards
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive potential shares of common stock excluded from computation of earnings per share	63	27	88
4.75% convertible subordinated notes
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Interest rate (percent)	4.75%	4.75%	4.75%	4.75%

Assets Held for Sale (Detail)

Assets Held for Sale (Detail) $ in Thousands, ¥ in Millions	1 Months Ended					3 Months Ended									12 Months Ended
	Nov. 30, 2016JPY (¥)	Nov. 30, 2016USD ($)	Oct. 31, 2016JPY (¥)	Oct. 31, 2016USD ($)	Feb. 28, 2016USD ($)	Dec. 31, 2017USD ($)	Sep. 30, 2017USD ($)	Jun. 30, 2017USD ($)	Mar. 31, 2017JPY (¥)	Mar. 31, 2017USD ($)	Dec. 31, 2016USD ($)	Sep. 30, 2016USD ($)	Jun. 30, 2016USD ($)	Mar. 31, 2016USD ($)	Dec. 31, 2017USD ($)	Dec. 31, 2016USD ($)	Dec. 31, 2015USD ($)	Sep. 29, 2016USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from sale of assets, net cash transferred															$ 47,767	$ 851,582	$ 0
Impairment charges												$ 7,700			0	7,698	0
Other current assets												71,800						$ 79,500
Gain (loss) on asset sales															0	32,816	0
Revenues															4,368,428	3,611,989	2,725,867
Net income						$ 65,215	$ 79,900	$ 45,805		$ 42,062	$ 61,750	$ 51,450	$ 44,711	$ (31,111)	$ 232,982	126,800	187,774
Held-for-sale | London 2 (LD2) [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain (loss) on asset sales																27,900
Revenues																6,100	17,600
Net income																$ 2,300	$ 7,200
Held-for-sale | San Jose Land Parcel
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain (loss) on asset sales					$ 5,200
Solar Power Assets | Bit-isle
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from sale of assets, net cash transferred	¥ 2,500	$ 22,100	¥ 400	$ 3,800					¥ 5,313.4	$ 47,800

Discontinued Operations (Detail

Discontinued Operations (Detail) $ in Thousands, € in Millions, £ in Millions	Jul. 05, 2016USD ($)	Sep. 30, 2016USD ($)	Dec. 31, 2017USD ($)	Dec. 31, 2016USD ($)	Dec. 31, 2015USD ($)	Jul. 05, 2016EUR (€)	Jul. 05, 2016GBP (£)	Jul. 05, 2016USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain on sale of discontinued operations, net of tax			$ 0	$ 2,351	$ 0
Digital Realty
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposal group, including discontinued operation, consideration						€ 304.6	£ 376.2	$ 827,300
Telecity Group plc
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain on sale of discontinued operations, net of tax	$ 2,400
Capital expenditure, discontinued operations		$ 31,500

Discontinued Operations - Finan

Discontinued Operations - Financial Results (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Discontinued Operations and Disposal Groups [Abstract]
Revenues		$ 48,782
Cost of revenues		24,795
Sales and marketing		1,030
General and administrative		7,026
Total costs and operating expenses		32,851
Income from operations of discontinued operations		15,931
Interest expense and other, net		(1,286)
Income from discontinued operations before income taxes		14,645
Income tax expense		(4,604)
Gain on sale of discontinued operations, net of tax	$ 0	2,351	$ 0
Net income from discontinued operations, net of tax	$ 0	$ 12,392	$ 0

Balance Sheet Components - Addi

Balance Sheet Components - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Cash and Cash Equivalents [Line Items]
Cash and cash equivalents maturity period less than (in days)	P90D
Short-term investments maturity period less than (in years)	P1Y
Aggregate capital leased assets, gross	$ 760.4	$ 715.3
Accumulated depreciation on capital leases	$ 199.2	$ 161.4
Minimum
Cash and Cash Equivalents [Line Items]
Long-term investments maturity period (in years)	P1Y
Maximum
Cash and Cash Equivalents [Line Items]
Long-term investments maturity period (in years)	P3Y

Balance Sheet Components - Cash

Balance Sheet Components - Cash, Cash Equivalents and Short-Term and Long-Term Investments (Detail) - USD ($) $ in Thousands		Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Investment Holdings [Line Items]
Cash	[1]	$ 985,382	$ 345,119
Money market funds		427,135	400,388
Certificate of deposit		0	2,969
Total cash and cash equivalents		1,412,517	748,476	$ 2,228,838
Total short-term and long-term investments		37,514	13,451
Total cash, cash equivalents and short-term and long-term investments		1,450,031	761,927
Certificates of deposit
Investment Holdings [Line Items]
Total short-term and long-term investments		31,351	6,988
Publicly traded equity securities
Investment Holdings [Line Items]
Total short-term and long-term investments		$ 6,163	$ 6,463
[1]	Excludes restricted cash.

Balance Sheet Components - Summ

Balance Sheet Components - Summary of Cost and Estimated Fair Value of Marketable Securities (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Amortized cost, due within one year	$ 28,271	$ 3,409
Amortized cost, due after one year through three years	3,080	3,579
Amortized cost	$ 31,351	$ 6,988

Balance Sheet Components - Net

Balance Sheet Components - Net Unrealized Gains (Losses) on Available-for-Sale Securities (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 35,067	$ 11,838
Gross Unrealized Gains	2,447	1,613
Gross Unrealized Losses	0	0
Fair Value	37,514	13,451
Certificates of deposit
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	31,351	6,988
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Fair Value	31,351	6,988
Publicly traded equity securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	3,716	4,850
Gross Unrealized Gains	2,447	1,613
Gross Unrealized Losses	0	0
Fair Value	$ 6,163	$ 6,463

Balance Sheet Components - Acco

Balance Sheet Components - Accounts Receivable, Net (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Receivables [Abstract]
Accounts receivable	$ 594,541	$ 411,920
Allowance for doubtful accounts	(18,228)	(15,675)	$ (10,352)	$ (9,466)
Accounts receivable, net	$ 576,313	$ 396,245

Balance Sheet Components - Acti

Balance Sheet Components - Activities of Allowance for Doubtful Accounts (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Allowance for Doubtful Accounts Receivable [Roll Forward]
Beginning Balance	$ 15,675	$ 10,352	$ 9,466
Provision for allowance for doubtful accounts	5,627	8,260	5,037
Net write-offs	(4,546)	(2,521)	(3,438)
Impact of foreign currency exchange	1,472	(416)	(713)
Ending Balance	$ 18,228	$ 15,675	$ 10,352

Balance Sheet Components - Othe

Balance Sheet Components - Other Current Assets (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Prepaid expenses	$ 64,832	$ 79,258
Taxes receivable	110,961	102,002
Restrictive cash, current	26,919	15,065
Other receivables	7,797	46,809
Derivative instruments	4,175	54,072
Other current assets	17,343	22,190
Other current assets, total	$ 232,027	$ 319,396

Balance Sheet Components - Prop

Balance Sheet Components - Property, Plant and Equipment, Net (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 13,738,839	$ 10,650,897
Less accumulated depreciation	(4,344,237)	(3,451,687)
Property, plant and equipment, net	9,394,602	7,199,210
Core systems
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	6,334,702	4,760,868
Buildings
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	3,906,686	2,785,799
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	1,850,351	1,599,424
Construction in progress
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	425,428	645,388
Personal property
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	798,133	622,069
Land
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 423,539	$ 237,349

Balance Sheet Components - Good

Balance Sheet Components - Goodwill and Other Intangible Assets (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Goodwill And Intangible Assets [Line Items]
Goodwill	$ 4,411,762	$ 2,986,064	$ 1,063,200
Intangible assets, gross	2,805,117	956,967
Accumulated amortization	(420,145)	(237,736)
Intangible assets, net	2,384,972	719,231	224,565	$ 147,527
Customer relationships
Goodwill And Intangible Assets [Line Items]
Intangible assets, gross	2,682,656	839,593
Accumulated amortization	(334,985)	(183,270)
Trade names
Goodwill And Intangible Assets [Line Items]
Intangible assets, gross	73,295	69,519
Accumulated amortization	(71,728)	(43,830)
Favorable leases
Goodwill And Intangible Assets [Line Items]
Intangible assets, gross	39,470	38,139
Accumulated amortization	(10,196)	(8,027)
Licenses
Goodwill And Intangible Assets [Line Items]
Intangible assets, gross	9,696	9,697
Accumulated amortization	(3,236)	(2,591)
Others [Member]
Goodwill And Intangible Assets [Line Items]
Intangible assets, gross	0	19
Accumulated amortization	0	(18)
Reportable geographical components | Americas
Goodwill And Intangible Assets [Line Items]
Goodwill	1,561,512	469,438	460,203
Intangible assets, net	1,646,373	40,117	50,643	62,954
Reportable geographical components | EMEA
Goodwill And Intangible Assets [Line Items]
Goodwill	2,610,899	2,281,306	374,070
Intangible assets, net	631,219	562,361	44,355	62,185
Reportable geographical components | Asia-Pacific
Goodwill And Intangible Assets [Line Items]
Goodwill	239,351	235,320	228,927
Intangible assets, net	$ 107,380	$ 116,753	$ 129,567	$ 22,388

Balance Sheet Components - Carr

Balance Sheet Components - Carrying Amount of Goodwill by Geographical Regions (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Goodwill [Roll Forward]
Balance, Beginning	$ 2,986,064	$ 1,063,200
Asset held for sale adjustments		1,605
Impact of foreign currency exchange	166,443	(343,143)
Balance, Ending	4,411,762	2,986,064
Reportable geographical components | Americas
Goodwill [Roll Forward]
Balance, Beginning	469,438	460,203
Impact of foreign currency exchange	(3,188)	9,235
Balance, Ending	1,561,512	469,438
Reportable geographical components | EMEA
Goodwill [Roll Forward]
Balance, Beginning	2,281,306	374,070
Asset held for sale adjustments		1,605
Impact of foreign currency exchange	165,600	(358,771)
Balance, Ending	2,610,899	2,281,306
Reportable geographical components | Asia-Pacific
Goodwill [Roll Forward]
Balance, Beginning	235,320	228,927
Impact of foreign currency exchange	4,031	6,393
Balance, Ending	239,351	235,320
Telecity Group plc
Goodwill [Roll Forward]
Purchase accounting adjustments		2,215,567
Telecity Group plc | Reportable geographical components | EMEA
Goodwill [Roll Forward]
Purchase accounting adjustments		2,215,567
Digital Realty
Goodwill [Roll Forward]
Purchase accounting adjustments		48,835
Digital Realty | Reportable geographical components | EMEA
Goodwill [Roll Forward]
Purchase accounting adjustments		$ 48,835
Verizon
Goodwill [Roll Forward]
Purchase accounting adjustments	1,095,262
Verizon | Reportable geographical components | Americas
Goodwill [Roll Forward]
Purchase accounting adjustments	1,095,262
Itconic, Zenium and IO
Goodwill [Roll Forward]
Purchase accounting adjustments	163,993
Itconic, Zenium and IO | Reportable geographical components | EMEA
Goodwill [Roll Forward]
Purchase accounting adjustments	$ 163,993

Balance Sheet Components - Ne66

Balance Sheet Components - Net Book Value of Intangible Assets by Geographic Regions (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Finite-lived Intangible Assets [Roll Forward]
Intangible assets, net beginning balance	$ 719,231	$ 224,565	$ 147,527
Asset held for sale adjustments		(2,460)	(784)
Write-off of intangible asset	(725)	(573)	(357)
Amortization of intangibles	(177,008)	(122,862)	(27,446)
Impact of foreign currency exchange	36,929	(85,440)	(6,838)
Intangible assets, net ending balance	2,384,972	719,231	224,565
Nimbo Technologies Inc.
Finite-lived Intangible Assets [Roll Forward]
Intangible assets acquired during period			1,089
Bit-isle
Finite-lived Intangible Assets [Roll Forward]
Intangible assets acquired during period			111,374
Telecity Group plc
Finite-lived Intangible Assets [Roll Forward]
Intangible assets acquired during period		694,243
Digital Realty
Finite-lived Intangible Assets [Roll Forward]
Intangible assets acquired during period		11,758
Verizon
Finite-lived Intangible Assets [Roll Forward]
Intangible assets acquired during period	1,693,900
Itconic, Zenium and IO
Finite-lived Intangible Assets [Roll Forward]
Intangible assets acquired during period	112,645
Reportable geographical components | Americas
Finite-lived Intangible Assets [Roll Forward]
Intangible assets, net beginning balance	40,117	50,643	62,954
Write-off of intangible asset		(573)
Amortization of intangibles	(84,749)	(11,348)	(11,432)
Impact of foreign currency exchange	(2,895)	1,395	(1,968)
Intangible assets, net ending balance	1,646,373	40,117	50,643
Reportable geographical components | Americas | Nimbo Technologies Inc.
Finite-lived Intangible Assets [Roll Forward]
Intangible assets acquired during period			1,089
Reportable geographical components | Americas | Verizon
Finite-lived Intangible Assets [Roll Forward]
Intangible assets acquired during period	1,693,900
Reportable geographical components | EMEA
Finite-lived Intangible Assets [Roll Forward]
Intangible assets, net beginning balance	562,361	44,355	62,185
Asset held for sale adjustments			(784)
Write-off of intangible asset	(725)		(357)
Amortization of intangibles	(79,105)	(97,715)	(11,675)
Impact of foreign currency exchange	36,043	(90,280)	(5,014)
Intangible assets, net ending balance	631,219	562,361	44,355
Reportable geographical components | EMEA | Telecity Group plc
Finite-lived Intangible Assets [Roll Forward]
Intangible assets acquired during period		694,243
Reportable geographical components | EMEA | Digital Realty
Finite-lived Intangible Assets [Roll Forward]
Intangible assets acquired during period		11,758
Reportable geographical components | EMEA | Itconic, Zenium and IO
Finite-lived Intangible Assets [Roll Forward]
Intangible assets acquired during period	112,645
Reportable geographical components | Asia-Pacific
Finite-lived Intangible Assets [Roll Forward]
Intangible assets, net beginning balance	116,753	129,567	22,388
Asset held for sale adjustments		(2,460)
Amortization of intangibles	(13,154)	(13,799)	(4,339)
Impact of foreign currency exchange	3,781	3,445	144
Intangible assets, net ending balance	$ 107,380	$ 116,753	129,567
Reportable geographical components | Asia-Pacific | Bit-isle
Finite-lived Intangible Assets [Roll Forward]
Intangible assets acquired during period			$ 111,374

Balance Sheet Components - Esti

Balance Sheet Components - Estimated Future Amortization Expense Related to Intangibles (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Goodwill and Intangible Assets Disclosure [Abstract]
2,018	$ 196,469
2,019	191,298
2,020	184,602
2,021	176,740
2,022	172,547
Thereafter	1,463,316
Intangible assets, net	$ 2,384,972	$ 719,231	$ 224,565	$ 147,527

Balance Sheet Components - Ot68

Balance Sheet Components - Other Assets (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Deferred tax assets, net	$ 66,031	$ 62,308
Prepaid expenses	89,784	80,888
Debt issuance costs, net	10,670	6,611
Deposits	48,296	40,893
Restricted cash	11,265	9,706
Derivative instruments	4,110	15,907
Other assets	11,594	9,985
Other assets	$ 241,750	$ 226,298

Balance Sheet Components - Ac69

Balance Sheet Components - Accounts Payable and Accrued Expenses (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Payables and Accruals [Abstract]
Accounts payable	$ 101,744	$ 60,211
Accrued compensation and benefits	214,585	172,808
Accrued interest	100,347	95,832
Accrued taxes	130,272	133,562
Accrued utilities and security	68,916	44,202
Accrued professional fees	13,830	14,071
Accrued repairs and maintenance	11,232	5,430
Accrued other	78,331	55,623
Accounts payable and accrued expenses	719,257	581,739
Income taxes payable	$ 56,400	$ 44,000

Balance Sheet Components - Ot70

Balance Sheet Components - Other Current Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Other Liabilities Disclosure [Abstract]
Deferred installation revenue	$ 74,452	$ 61,399
Customer deposits	16,598	13,894
Derivative instruments	34,466	10,819
Deferred recurring revenue	12,848	18,704
Deferred rent	6,546	4,158
Dividends payable	11,181	11,999
Asset retirement obligations	1,716	10,036
Other current liabilities	2,107	2,131
Other current liabilities, total	$ 159,914	$ 133,140

Balance Sheet Components - Ot71

Balance Sheet Components - Other Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Other Liabilities Disclosure [Abstract]
Asset retirement obligations	$ 96,823	$ 92,979
Deferred tax liabilities, net	252,287	274,341
Deferred installation revenue	117,021	96,744
Deferred rent	97,782	76,566
Accrued taxes	64,378	56,208
Dividends payable	6,669	8,495
Customer deposits	10,849	4,773
Deferred recurring revenue	4,236	2,681
Derivative instruments	6,381	140
Other liabilities	5,284	10,321
Other liabilities noncurrent	$ 661,710	$ 623,248

Balance Sheet Components - Su72

Balance Sheet Components - Summary of Asset Retirement Obligation Liability (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
Asset retirement obligations, beginning balance	$ 103,015	$ 78,482	$ 64,858
Additions	17,736	22,955	17,337
Adjustments	(34,576)	(2,366)	(4,676)
Accretion expense	7,335	6,685	3,349
Impact of foreign currency exchange	5,029	(2,741)	(2,386)
Asset retirement obligations, ending balance	$ 98,539	$ 103,015	$ 78,482

Derivatives and Hedging Activit

Derivatives and Hedging Activities - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Derivative [Line Items]
Foreign currency translation adjustment (CTA) gain (loss)	$ 454,269	$ (507,420)	$ (186,763)
Gain (loss) recognized in income, ineffective portion and amount excluded from effectiveness testing, net	3,800
Gains reclassified from accumulated other comprehensive income (loss) to revenue	20,800	38,400	28,000
Net losses reclassified from accumulated other comprehensive income (loss) to operating expenses	11,200	19,900	6,300
Designated as hedging instruments
Derivative [Line Items]
Derivatives used in net investment hedges	3,149,500	646,200
Foreign currency translation adjustment (CTA) gain (loss)	(235,300)	85,500
Foreign exchange gains (losses)		40,000
Not designated as hedging instruments | Embedded derivatives
Derivative [Line Items]
Net gain (loss) on embedded derivatives	(6,800)
Not designated as hedging instruments | Economic hedges of embedded derivatives
Derivative [Line Items]
Net gain (loss) on embedded derivatives		2,900	(2,300)
Not designated as hedging instruments | Foreign currency forward contracts designated as cash flow hedges
Derivative [Line Items]
Gains (losses) from foreign currency forward contracts	$ (69,000)	$ 74,200	$ (24,300)

Derivatives and Hedging Activ74

Derivatives and Hedging Activities - Summary of Cash Flow Hedge Instruments (Detail) - Cash flow hedge instruments - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Derivatives, Fair Value [Line Items]
Notional amount, derivative assets	$ 72,262	$ 545,638
Notional amount, derivative liabilities	440,637	42,207
Notional amount, total	512,899	587,845
Fair value, derivative assets	2,379	44,570
Fair value, derivative liabilities	(29,777)	(1,815)
Fair value, total	(27,398)	42,755
Accumulated Other Comprehensive Income (Loss) (2)(3)
Derivatives, Fair Value [Line Items]
Fair value, derivative assets	2,055	42,634
Fair value, derivative liabilities	(34,311)	(1,453)
Fair value, total	(32,256)	41,181
Net gain (loss) related to cash flow hedges recorded in accumulated other comprehensive income (loss) that is expected to be recognized in next 12 months	$ (26,700)	$ 31,900

Derivatives and Hedging Activ75

Derivatives and Hedging Activities - Schedule of Fair Value of Derivative Instruments Recognized in Consolidated Balance Sheets (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Derivative [Line Items]
Fair value of derivative assets, gross amounts	$ 8,285	$ 69,979
Fair value of derivative assets, gross amounts offset in the balance sheet	0	0
Fair value of derivative assets, net amounts	8,285	69,979
Fair value of derivative assets, gross amounts not offset in the consolidated balance sheet	(3,209)	(9,434)
Fair value of derivative assets, net	5,076	60,545
Fair value of derivative liabilities, gross Amounts	40,847	10,959
Fair value of derivative liabilities, gross amounts offset in the balance sheet	0	0
Fair value of derivative liabilities, net amounts	40,847	10,959
Fair value of derivative liabilities, gross amounts not offset in the consolidated balance sheet	(3,209)	(9,434)
Fair value of derivative liabilities, net	37,638	1,525
Additional netting benefit
Derivative [Line Items]
Fair value of derivative assets, gross amounts offset in the balance sheet	0	0
Fair value of derivative assets, net amounts		0
Fair value of derivative assets, gross amounts not offset in the consolidated balance sheet	(490)	(2,436)
Fair value of derivative assets, net	(490)	(2,436)
Fair value of derivative liabilities, gross amounts offset in the balance sheet	0	0
Fair value of derivative liabilities, net amounts		0
Fair value of derivative liabilities, gross amounts not offset in the consolidated balance sheet	(490)	(2,436)
Fair value of derivative liabilities, net	(490)	(2,436)
Designated as hedging instruments
Derivative [Line Items]
Fair value of derivative assets, gross amounts		51,500
Fair value of derivative assets, gross amounts offset in the balance sheet		0
Fair value of derivative assets, net amounts		51,500
Fair value of derivative assets, gross amounts not offset in the consolidated balance sheet		(5,125)
Fair value of derivative assets, net		46,375
Fair value of derivative liabilities, gross Amounts		5,340
Fair value of derivative liabilities, gross amounts offset in the balance sheet		0
Fair value of derivative liabilities, net amounts		5,340
Fair value of derivative liabilities, gross amounts not offset in the consolidated balance sheet		(5,125)
Fair value of derivative liabilities, net		215
Designated as hedging instruments | Foreign currency forward contracts designated as cash flow hedges
Derivative [Line Items]
Fair value of derivative assets, gross amounts	2,379	44,570
Fair value of derivative assets, gross amounts offset in the balance sheet	0	0
Fair value of derivative assets, net amounts	2,379	44,570
Fair value of derivative assets, gross amounts not offset in the consolidated balance sheet	(2,379)	(1,815)
Fair value of derivative assets, net	0	42,755
Fair value of derivative liabilities, gross Amounts	29,777	1,815
Fair value of derivative liabilities, gross amounts offset in the balance sheet	0	0
Fair value of derivative liabilities, net amounts	29,777	1,815
Fair value of derivative liabilities, gross amounts not offset in the consolidated balance sheet	(2,379)	(1,815)
Fair value of derivative liabilities, net	27,398
Designated as hedging instruments | Foreign currency forward contracts
Derivative [Line Items]
Fair value of derivative assets, gross amounts		6,930
Fair value of derivative assets, gross amounts offset in the balance sheet		0
Fair value of derivative assets, net amounts		6,930
Fair value of derivative assets, gross amounts not offset in the consolidated balance sheet		(3,310)
Fair value of derivative assets, net		3,620
Fair value of derivative liabilities, gross Amounts		3,525
Fair value of derivative liabilities, gross amounts offset in the balance sheet		0
Fair value of derivative liabilities, net amounts		3,525
Fair value of derivative liabilities, gross amounts not offset in the consolidated balance sheet		(3,310)
Fair value of derivative liabilities, net		215
Not designated as hedging instruments
Derivative [Line Items]
Fair value of derivative assets, gross amounts	5,906	18,479
Fair value of derivative assets, gross amounts offset in the balance sheet	0	0
Fair value of derivative assets, net amounts	5,906	18,479
Fair value of derivative assets, gross amounts not offset in the consolidated balance sheet	(340)	(1,873)
Fair value of derivative assets, net	5,566	16,606
Fair value of derivative liabilities, gross Amounts	11,070	5,619
Fair value of derivative liabilities, gross amounts offset in the balance sheet	0	0
Fair value of derivative liabilities, net amounts	11,070	5,619
Fair value of derivative liabilities, gross amounts not offset in the consolidated balance sheet	(340)	(1,873)
Fair value of derivative liabilities, net	10,730	3,746
Not designated as hedging instruments | Embedded derivatives
Derivative [Line Items]
Fair value of derivative assets, gross amounts	5,076	9,745
Fair value of derivative assets, gross amounts offset in the balance sheet	0	0
Fair value of derivative assets, net amounts	5,076	9,745
Fair value of derivative assets, net	5,076	9,745
Fair value of derivative liabilities, gross Amounts	3,503	1,525
Fair value of derivative liabilities, gross amounts offset in the balance sheet	0	0
Fair value of derivative liabilities, net amounts	3,503	1,525
Fair value of derivative liabilities, net	3,503	1,525
Not designated as hedging instruments | Economic hedges of embedded derivatives
Derivative [Line Items]
Fair value of derivative assets, gross amounts	325
Fair value of derivative assets, gross amounts offset in the balance sheet	0
Fair value of derivative assets, net amounts	325
Fair value of derivative assets, net	325
Fair value of derivative liabilities, gross Amounts	20	866
Fair value of derivative liabilities, gross amounts offset in the balance sheet	0	0
Fair value of derivative liabilities, net amounts	20	866
Fair value of derivative liabilities, net	20	866
Not designated as hedging instruments | Foreign currency forward contracts
Derivative [Line Items]
Fair value of derivative assets, gross amounts	505	8,734
Fair value of derivative assets, gross amounts offset in the balance sheet	0	0
Fair value of derivative assets, net amounts	505	8,734
Fair value of derivative assets, gross amounts not offset in the consolidated balance sheet	(340)	(1,873)
Fair value of derivative assets, net	165	6,861
Fair value of derivative liabilities, gross Amounts	7,547	3,228
Fair value of derivative liabilities, gross amounts offset in the balance sheet	0	0
Fair value of derivative liabilities, net amounts	7,547	3,228
Fair value of derivative liabilities, gross amounts not offset in the consolidated balance sheet	(340)	(1,873)
Fair value of derivative liabilities, net	$ 7,207	$ 1,355

Fair Value Measurements - Finan

Fair Value Measurements - Financial Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets, fair value disclosure	$ 8,285	$ 69,979
Derivative liability, fair value, gross liability	40,847	10,959
Fair value, measurements, recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash, fair value disclosure	985,382	345,119
Derivative assets, fair value disclosure	8,285	69,979
Assets, fair value disclosure	1,458,316	831,906
Derivative liability, fair value, gross liability	40,847	10,959
Fair value, measurements, recurring | Fair value, Inputs, Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash, fair value disclosure	985,382	345,119
Derivative assets, fair value disclosure	0	0
Assets, fair value disclosure	1,418,680	751,970
Derivative liability, fair value, gross liability	0	0
Fair value, measurements, recurring | Fair value, Inputs, Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash, fair value disclosure	0	0
Derivative assets, fair value disclosure	8,285	69,979
Assets, fair value disclosure	39,636	79,936
Derivative liability, fair value, gross liability	40,847	10,959
Money market and deposit accounts | Fair value, measurements, recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, fair value disclosure	427,135	400,388
Money market and deposit accounts | Fair value, measurements, recurring | Fair value, Inputs, Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, fair value disclosure	427,135	400,388
Money market and deposit accounts | Fair value, measurements, recurring | Fair value, Inputs, Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, fair value disclosure	0	0
Publicly traded equity securities | Fair value, measurements, recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, fair value disclosure	6,163	6,463
Publicly traded equity securities | Fair value, measurements, recurring | Fair value, Inputs, Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, fair value disclosure	6,163	6,463
Publicly traded equity securities | Fair value, measurements, recurring | Fair value, Inputs, Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, fair value disclosure	0	0
Certificates of deposit | Fair value, measurements, recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, fair value disclosure	31,351	9,957
Certificates of deposit | Fair value, measurements, recurring | Fair value, Inputs, Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, fair value disclosure	0	0
Certificates of deposit | Fair value, measurements, recurring | Fair value, Inputs, Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, fair value disclosure	$ 31,351	$ 9,957

Leases - Additional Information

Leases - Additional Information (Detail) $ in Thousands, € in Millions, HKD in Millions	1 Months Ended		12 Months Ended
	May 31, 2017EUR (€)	May 31, 2017USD ($)	Dec. 31, 2017USD ($)	Dec. 31, 2016USD ($)	Dec. 31, 2015USD ($)	Dec. 31, 2017HKD	May 31, 2017USD ($)
Capital Leased Assets [Line Items]
Weighted average effective interest rate (percent)			7.86%			7.86%
Purchases of real estate			$ 95,083	$ 28,118	$ 38,282
Repayment of capital lease and other financing obligations			93,470	114,385	28,663
Loss on debt extinguishment			(65,772)	(12,276)	(289)
Rent expense			157,900	$ 140,600	$ 101,500
Erfpacht
Capital Leased Assets [Line Items]
Purchases of real estate	€ 26.7	$ 30,400
AM5 AMSTERDAM, THE NETHERLANDS [Member]
Capital Leased Assets [Line Items]
Repayment of capital lease and other financing obligations	20	22,800
Loss on debt extinguishment	7.2	$ 8,200
HK5, Hong Kong 5 [Member]
Capital Leased Assets [Line Items]
Capital lease liability			$ 73,900			HKD 577.4
Minimum
Capital Leased Assets [Line Items]
Capital lease expiration period			2,018
Maximum
Capital Leased Assets [Line Items]
Capital lease expiration period			2,053
Other assets
Capital Leased Assets [Line Items]
Ground Leases, Gross	€ 6.7						$ 7,600

Leases - Summary of Capital Lea

Leases - Summary of Capital Lease and Other Financing Obligations (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Schedule Of Capitalized Lease [Line Items]
Less current portion	$ (78,705)	$ (101,046)
Noncurrent portion	1,620,256	$ 1,410,742
Capital Lease Obligations
Schedule Of Capitalized Lease [Line Items]
2,018	100,815
2,019	94,234
2,020	94,327
2,021	92,455
2,022	92,309
Thereafter	801,237
Total minimum lease payments	1,275,377
Plus amount representing residual property value	0
Less amount representing interest	(531,820)
Present value of net minimum lease payments	743,557
Less current portion	(41,117)
Noncurrent portion	702,440
Other Financing Obligations
Schedule Of Capitalized Lease [Line Items]
2,018	101,095
2,019	88,028
2,020	87,758
2,021	89,595
2,022	90,070
Thereafter	886,277
Total minimum lease payments	1,342,823
Plus amount representing residual property value	545,656
Less amount representing interest	(933,075)
Present value of net minimum lease payments	955,404
Less current portion	(37,588)
Noncurrent portion	917,816
Capital lease and other financing obligations total
Schedule Of Capitalized Lease [Line Items]
2,018	201,910
2,019	182,262
2,020	182,085
2,021	182,050
2,022	182,379
Thereafter	1,687,514
Total minimum lease payments	2,618,200
Plus amount representing residual property value	545,656
Less amount representing interest	(1,464,895)
Present value of net minimum lease payments	1,698,961
Less current portion	(78,705)
Noncurrent portion	$ 1,620,256

Leases - Schedule of Minimum Fu

Leases - Schedule of Minimum Future Operating Lease Payments (Detail) $ in Thousands	Dec. 31, 2017USD ($)
Operating Leases, Future Minimum Payments Due [Abstract]
2,018	$ 176,789
2,019	164,711
2,020	154,329
2,021	144,706
2,022	140,451
Thereafter	1,132,964
Total	$ 1,913,950

Debt Facilities - Mortgage and

Debt Facilities - Mortgage and Loans Payable (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Debt Instrument [Line Items]
Long term debt, gross	$ 1,466,224	$ 1,457,964
Less the amount representing debt discount and debt issuance cost	(10,666)	(22,811)
Add the amount representing mortgage premium	2,051	1,862
Loans payable current and non current	1,457,609	1,437,015
Less current portion	(64,491)	(67,928)
Loans payable, noncurrent	1,393,118	1,369,087
Term loans
Debt Instrument [Line Items]
Long term debt, gross	1,417,352	1,413,582
Mortgage payable and other loans payable
Debt Instrument [Line Items]
Long term debt, gross	$ 48,872	$ 44,382

Debt Facilities - Senior Credit

Debt Facilities - Senior Credit Facility (Detail) SFr in Millions, SEK in Millions	Dec. 12, 2017GBP (£)	Aug. 15, 2017	Jan. 06, 2017EUR (€)	Jan. 06, 2017USD ($)	Dec. 22, 2016EUR (€)	Sep. 30, 2016JPY (¥)	Jan. 08, 2016GBP (£)	Jan. 08, 2016USD ($)	Dec. 08, 2015USD ($)	Apr. 30, 2015EUR (€)	Apr. 30, 2015JPY (¥)	Apr. 30, 2015GBP (£)	Apr. 30, 2015USD ($)	Apr. 30, 2015CHF (SFr)	Dec. 17, 2014USD ($)	Oct. 31, 2016JPY (¥)	Sep. 30, 2015JPY (¥)	Dec. 31, 2017JPY (¥)	Dec. 31, 2017USD ($)	Dec. 31, 2016USD ($)	Dec. 31, 2015USD ($)	Dec. 31, 2017GBP (£)	Dec. 31, 2017USD ($)	Dec. 31, 2017SEK	Dec. 12, 2017USD ($)	Dec. 12, 2017SEK	Oct. 31, 2016USD ($)	Sep. 30, 2016USD ($)	Dec. 08, 2015GBP (£)	Dec. 08, 2015USD ($)	Sep. 30, 2015USD ($)
Debt Instrument [Line Items]
Repayment of debt																			$ 2,277,798,000	$ 1,462,888,000	$ 715,270,000
Effective interest rate (percent)																		7.86%				7.86%	7.86%	7.86%
Revolving credit facility borrowings | Letter of Credit
Debt Instrument [Line Items]
Maximum borrowing capacity																							$ 250,000,000
Revolving credit facility borrowings | Letter of Credit | Minimum
Debt Instrument [Line Items]
Margin rate (percent)																		0.00%	0.00%
Quarterly facility fee (percent)																		0.15%	0.15%
Revolving credit facility borrowings | Letter of Credit | Maximum
Debt Instrument [Line Items]
Margin rate (percent)																		0.40%	0.40%
Quarterly facility fee (percent)																		0.30%	0.30%
Revolving credit facility borrowings | LIBOR | Letter of Credit | Minimum
Debt Instrument [Line Items]
Variable rate (percent)																		0.85%	0.85%
Revolving credit facility borrowings | LIBOR | Letter of Credit | Maximum
Debt Instrument [Line Items]
Variable rate (percent)																		1.40%	1.40%
Revolving credit facility borrowings | Federal Funds Rate | Letter of Credit
Debt Instrument [Line Items]
Variable rate (percent)																		0.50%	0.50%
Revolving credit facility borrowings | One month LIBOR | Letter of Credit
Debt Instrument [Line Items]
Variable rate (percent)																		1.00%	1.00%
Revolving credit facility borrowings | Term A Loan Facility
Debt Instrument [Line Items]
Debt instrument, term															5 years
Revolving credit facility borrowings | Term A Loan Facility | Federal Funds Rate
Debt Instrument [Line Items]
Variable rate (percent)															0.50%
Revolving credit facility borrowings | Senior Credit Facility
Debt Instrument [Line Items]
Maximum borrowing capacity															$ 1,500,000,000										$ 3,000,000,000
Revolving credit facility borrowings | Revolving Credit Facility
Debt Instrument [Line Items]
Maximum borrowing capacity															1,000,000,000										2,000,000,000					$ 1,500,000,000
Increase in borrowing capacity									$ 1,000,000,000
Revolving credit facility borrowings | Revolving Credit Facility | Letter of Credit
Debt Instrument [Line Items]
Maximum borrowing capacity															$ 150,000,000
Revolving credit facility borrowings | Revolving Credit Facility | Letter of Credit | Minimum
Debt Instrument [Line Items]
Quarterly facility fee (percent)															0.25%
Revolving credit facility borrowings | Revolving Credit Facility | Letter of Credit | Maximum
Debt Instrument [Line Items]
Quarterly facility fee (percent)															0.35%
Revolving credit facility borrowings | Revolving Credit Facility | LIBOR | Letter of Credit | Minimum
Debt Instrument [Line Items]
Variable rate (percent)															1.00%
Revolving credit facility borrowings | Revolving Credit Facility | LIBOR | Letter of Credit | Maximum
Debt Instrument [Line Items]
Variable rate (percent)															1.40%
Revolving credit facility borrowings | Term A Loan Facility
Debt Instrument [Line Items]
Maximum borrowing capacity															$ 500,000,000										1,000,000,000
Debt instrument, term	5 years
LIne of credit outstanding	£ 500,000,000																					£ 500,000,000	$ 1,017,800,000	SEK 2,800	$ 997,100,000	SEK 2,800
Principle repay percentage, per year																		5.00%	5.00%
Repayment of debt													$ 490,000,000
Proceeds from issuance of debt										€ 184,900,000	¥ 11,924,000,000	£ 92,600,000	$ 490,000,000	SFr 47.8
Weighted average interest rate during period (percent)																		1.85%				1.85%	1.85%	1.85%
Debt Issuance Costs, Net																							$ 3,200,000
Periodic payment factor (percent)										2.00%	2.00%	2.00%	2.00%	2.00%
Periodic payment factor denominator										0.98	0.98	0.98	0.98	0.98
Revolving credit facility borrowings | Term A Loan Facility | Minimum
Debt Instrument [Line Items]
Variable rate (percent)	1.00%
Revolving credit facility borrowings | Term A Loan Facility | Maximum
Debt Instrument [Line Items]
Variable rate (percent)	1.70%
Revolving credit facility borrowings | Term B Loan Commitments
Debt Instrument [Line Items]
Proceeds from issuance of debt							£ 300,000,000	$ 250,000,000
Periodic payment as a percentage of original principal									0.25%
Revolving credit facility borrowings | USD Term B Loan Facility
Debt Instrument [Line Items]
Maximum borrowing capacity					€ 1,000,000,000																									250,000,000
Debt instrument, term									7 years
Periodic payment as a percentage of original principal		2.00%			2.50%				0.25%
Revolving credit facility borrowings | USD Term B Loan Facility | LIBOR
Debt Instrument [Line Items]
Variable rate (percent)					0.00%				0.75%
Margin rate (percent)									3.25%
Revolving credit facility borrowings | USD Term B Loan Facility | Federal Funds Rate
Debt Instrument [Line Items]
Variable rate (percent)									0.50%
Revolving credit facility borrowings | Sterling Term B Loan Commitment
Debt Instrument [Line Items]
Maximum borrowing capacity																													£ 300,000,000	$ 442,000,000
Debt instrument, term									7 years
Periodic payment as a percentage of original principal									0.50%
Revolving credit facility borrowings | Sterling Term B Loan Commitment | LIBOR
Debt Instrument [Line Items]
Margin rate (percent)					3.00%				3.75%
Minimum variable rate (percent)		0.00%			0.75%
Revolving credit facility borrowings | Term B-2 Loan Commitments
Debt Instrument [Line Items]
Proceeds from issuance of debt			€ 1,000,000,000	$ 1,059,800,000
Periodic payment as a percentage of original principal			0.25%	0.25%
Revolving credit facility borrowings | Term B-2 Loan Commitments | LIBOR
Debt Instrument [Line Items]
Variable rate (percent)					0.00%
Margin rate (percent)					2.50%
Minimum variable rate (percent)									0.75%
Revolving credit facility borrowings | Term B-2 Loan Commitments | Euro Interbank Offered Rate (EURIBOR)
Debt Instrument [Line Items]
Variable rate (percent)		2.50%	3.25%	3.25%
Senior Notes
Debt Instrument [Line Items]
Unamortized discount																				$ 39,230,000			78,151,000
Senior Notes | 2.875% Euro Senior Notes due 2026
Debt Instrument [Line Items]
Debt Issuance Costs, Net																							$ 15,900,000
Effective interest rate (percent)																		3.04%				3.04%	3.04%	3.04%
Unamortized discount																							$ 15,700,000
Interest rate (percent)																		2.875%				2.875%	2.875%	2.875%
Bridge Loan
Debt Instrument [Line Items]
Maximum borrowing capacity																	¥ 47,500,000,000														$ 395,200,000
Variable rate (percent)																1.75%	0.40%
Bridge Loan | Japanese Yen term loan
Debt Instrument [Line Items]
Maximum borrowing capacity						¥ 47,500,000,000																						$ 468,400,000
Debt instrument, term						5 years
LIne of credit outstanding																¥ 47,500,000,000		¥ 45,000,000,000					$ 399,600,000				$ 453,200,000
Quarterly installments | ¥																		625,000,000
Balloon payment | ¥						¥ 35,625,000,000
Unamortized discount																		¥ 843,600,000					$ 7,500,000

Debt Facilities - Bridge Term L

Debt Facilities - Bridge Term Loan (Detail) - Bridge Loan $ in Millions	1 Months Ended	9 Months Ended
	Oct. 31, 2016	Sep. 30, 2015JPY (¥)	Sep. 30, 2015USD ($)
Debt Instrument [Line Items]
Maximum borrowing capacity		¥ 47,500,000,000	$ 395.2
Variable rate (percent)	1.75%	0.40%

Debt Facilities - Japanese Yen

Debt Facilities - Japanese Yen Term Loan (Detail) - Japanese Yen term loan $ in Millions	Sep. 30, 2016JPY (¥)	Oct. 31, 2016JPY (¥)	Sep. 30, 2016JPY (¥)	Sep. 30, 2015JPY (¥)	Dec. 31, 2017JPY (¥)	Dec. 31, 2017USD ($)	Oct. 31, 2016USD ($)	Sep. 30, 2016USD ($)	Sep. 30, 2015USD ($)
Short-term Debt [Line Items]
Maximum borrowing capacity				¥ 47,500,000,000					$ 395.2
Variable rate (percent)		1.75%		0.40%
Japanese Yen term loan
Short-term Debt [Line Items]
Debt instrument, term	5 years
Maximum borrowing capacity	¥ 47,500,000,000		¥ 47,500,000,000					$ 468.4
Quarterly installments					¥ 625,000,000
Balloon payment	¥ 35,625,000,000		¥ 35,625,000,000
LIne of credit outstanding		¥ 47,500,000,000			45,000,000,000	$ 399.6	$ 453.2
Unamortized debt issuance costs					¥ 843,600,000	$ 7.5
Tokyo Interbank Offered Rate | Japanese Yen term loan
Short-term Debt [Line Items]
Variable rate (percent)			1.50%

Debt Facilities - Brazil Financ

Debt Facilities - Brazil Financings (Detail) $ in Thousands, BRL in Millions	1 Months Ended		12 Months Ended
	Jun. 30, 2016USD ($)	Jun. 30, 2016BRL	Dec. 31, 2017USD ($)	Dec. 31, 2016USD ($)	Dec. 31, 2015USD ($)
Debt Instrument [Line Items]
Repayment of debt			$ 2,277,798	$ 1,462,888	$ 715,270
Revolving credit facility borrowings | 2012 and 2013 Brazil Financing
Debt Instrument [Line Items]
Repayment of debt	$ 28,300	BRL 90.7

Debt Facilities - Mortgage Paya

Debt Facilities - Mortgage Payable (Detail) - USD ($) $ in Millions	Dec. 31, 2017	Oct. 31, 2013
Debt Instrument [Line Items]
Effective interest rate (percent)	7.86%
Mortgage Payable
Debt Instrument [Line Items]
Loans payable		$ 42.9
Effective interest rate (percent)		4.25%

Debt Facilities - Convertible D

Debt Facilities - Convertible Debt (Detail) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended			12 Months Ended
	Jun. 30, 2016	Dec. 31, 2015	Jun. 30, 2014	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2009	Jun. 15, 2016	Jun. 30, 2009
Debt Instrument [Line Items]
Issuance of common stock, convertible securities					$ 150,025	$ 7,884
Shares issued in exchange for convertible subordinated notes	380,779
Repayment of debt				$ 2,277,798	$ 1,462,888	$ 715,270
Common shares reserved for issuance, capped call				7,765,180
Adjustments to APIC, convertible debt with conversion feature	$ 141,700
Share price (dollars per share)								$ 372.10
4.75% convertible subordinated notes
Debt Instrument [Line Items]
Interest rate (percent)	4.75%	4.75%		4.75%	4.75%	4.75%
Convertible Subordinated Debt | 4.75% convertible subordinated notes
Debt Instrument [Line Items]
Aggregate principal debt amount issued									$ 373,800
Interest rate (percent)									4.75%
Issuance of common stock, convertible securities	$ 150,100	$ 7,800	$ 215,800
Shares issued in exchange for convertible subordinated notes	1,981,662	101,947	2,411,851
Repayment of debt	$ 3,600	$ 1	$ 51,700
Capped call premium, total							$ 49,700
Common shares reserved for issuance, capped call							4,432,638

Debt Facilities - Components of

Debt Facilities - Components of Total Interest Expense Recognized Related to Convertible Subordinated Notes (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Debt Instrument [Line Items]
Interest charges incurred	$ 501,323	$ 405,494	$ 309,998
Effective interest rate of the liability component (percent)	7.86%
Convertible Subordinated Debt | 4.75% convertible subordinated notes
Debt Instrument [Line Items]
Contractual interest expense		3,267
Amortization of debt issuance costs		186
Amortization of debt discount		3,775
Interest charges incurred		$ 7,228
Effective interest rate of the liability component (percent)		10.48%

Debt Facilities - Summary of Se

Debt Facilities - Summary of Senior Notes (Detail) - USD ($)	Dec. 31, 2017	Sep. 28, 2017	Mar. 31, 2017	Mar. 30, 2017	Dec. 31, 2016	Dec. 31, 2015	Nov. 30, 2014	Mar. 31, 2013
Debt Instrument [Line Items]
Long term debt, gross	$ 1,466,224,000				$ 1,457,964,000
Effective interest rate (percent)	7.86%
Total long term debt	$ 8,470,275,000
Senior Notes
Debt Instrument [Line Items]
Long term debt, gross	7,002,000,000				3,850,000,000
Less amount representing debt issuance cost	(78,151,000)				(39,230,000)
Total long term debt	$ 6,923,849,000				3,810,770,000
Senior Notes | 4.875% Senior Notes due 2020
Debt Instrument [Line Items]
Interest rate (percent)	4.875%							4.875%
Long term debt, gross	$ 0	$ 500,000,000			$ 500,000,000
Effective interest rate (percent)					5.07%
Senior Notes | 5.375% Senior Notes due 2022
Debt Instrument [Line Items]
Interest rate (percent)	5.375%						5.375%
Long term debt, gross	$ 750,000,000				$ 750,000,000
Effective interest rate (percent)	5.56%				5.56%
Senior Notes | 5.375% Senior Notes due 2023
Debt Instrument [Line Items]
Interest rate (percent)	5.375%							5.375%
Long term debt, gross	$ 1,000,000,000				$ 1,000,000,000
Effective interest rate (percent)	5.51%				5.51%
Senior Notes | 5.75% Senior Notes due 2025
Debt Instrument [Line Items]
Interest rate (percent)	5.75%
Long term debt, gross	$ 500,000,000				$ 500,000,000
Effective interest rate (percent)	5.88%				5.88%
Senior Notes | 2.875% Euro Senior Notes due 2025
Debt Instrument [Line Items]
Interest rate (percent)	2.875%
Long term debt, gross	$ 1,201,000,000
Effective interest rate (percent)	3.04%
Senior Notes | 5.875% Senior Notes due 2026
Debt Instrument [Line Items]
Interest rate (percent)	5.875%					5.875%
Long term debt, gross	$ 1,100,000,000				$ 1,100,000,000
Effective interest rate (percent)	6.03%				6.03%
Less amount representing debt issuance cost	$ (13,400,000)				$ (15,100,000)
Senior Notes | 2.875% Euro Senior Notes due 2026
Debt Instrument [Line Items]
Interest rate (percent)	2.875%
Long term debt, gross	$ 1,201,000,000
Effective interest rate (percent)	3.04%
Less amount representing debt issuance cost	$ (15,700,000)
Senior Notes | 5.375% Senior Notes due 2027
Debt Instrument [Line Items]
Interest rate (percent)	5.375%		5.375%
Long term debt, gross	$ 1,250,000,000
Effective interest rate (percent)	5.51%
Less amount representing debt issuance cost				$ (16,800,000)

Debt Facilities - Senior Notes

Debt Facilities - Senior Notes (Detail) ¥ in Millions	1 Months Ended	12 Months Ended
	Nov. 30, 2014USD ($)	Dec. 31, 2017USD ($)	Dec. 31, 2016USD ($)	Dec. 31, 2015USD ($)	Dec. 31, 2017EUR (€)	Dec. 31, 2017JPY (¥)	Dec. 31, 2017USD ($)	Sep. 30, 2017EUR (€)	Sep. 28, 2017USD ($)	Sep. 20, 2017USD ($)	Mar. 31, 2017USD ($)	Mar. 30, 2017USD ($)	Mar. 31, 2013USD ($)
Debt Instrument [Line Items]
Long term debt, gross			$ 1,457,964,000				$ 1,466,224,000
Repayment of debt		$ 2,277,798,000	1,462,888,000	$ 715,270,000
Unamortized premium			1,862,000				2,051,000
Accrued and unpaid interest			95,832,000				100,347,000
Loss on debt extinguishment		65,772,000	12,276,000	289,000
Senior Notes
Debt Instrument [Line Items]
Long term debt, gross			3,850,000,000				7,002,000,000
Unamortized debt issuance costs			39,230,000				78,151,000
Senior Notes | 2.875% Euro Senior Notes due 2026
Debt Instrument [Line Items]
Debt Issuance Costs, Net							$ 15,900,000
Aggregate principal debt amount issued | €					€ 1,000,000,000
Interest rate (percent)					2.875%	2.875%	2.875%
Long term debt, gross							$ 1,201,000,000
Unamortized debt issuance costs							15,700,000
Senior Notes | 5.375% Senior Notes due 2027
Debt Instrument [Line Items]
Debt Issuance Costs, Net							$ 15,600,000
Aggregate principal debt amount issued											$ 1,250,000,000
Interest rate (percent)					5.375%	5.375%	5.375%				5.375%
Long term debt, gross							$ 1,250,000,000
Unamortized debt issuance costs												$ 16,800,000
Senior Notes | 5.375% Senior Notes due 2022
Debt Instrument [Line Items]
Aggregate principal debt amount issued	$ 750,000,000
Interest rate (percent)	5.375%				5.375%	5.375%	5.375%
Long term debt, gross			750,000,000				$ 750,000,000
Senior Notes | 5.375% Senior Notes due 2022 | Debt Instrument Redemption Period Prior to January 1, 2018 [Member]
Debt Instrument [Line Items]
Redemption price, percentage	100.00%
Senior Notes | 5.375% Senior Notes due 2022 | Maximum | Debt Instrument Redemption Period Prior to January 1, 2018 [Member]
Debt Instrument [Line Items]
Applicable premium as a percentage of principal amount	1.00%
Senior Notes | 5.375% Senior Notes due 2022 | Treasury Rate [Member] | Debt Instrument Redemption Period Prior to January 1, 2018 [Member]
Debt Instrument [Line Items]
Variable redemption price percentage	50.00%
Senior Notes | 5.375% Senior Notes due 2022 | Redemption by Company of up to 35% of Aggregate Principal [Member] | Debt Instrument Redemption Period Prior to January 1, 2018 [Member]
Debt Instrument [Line Items]
Percentage of aggregate principal amount for redemption	35.00%
Senior notes indenture outstanding (percent)	65.00%
Senior Notes | 5.750% Senior Notes due 2025
Debt Instrument [Line Items]
Aggregate principal debt amount issued	$ 500,000,000
Interest rate (percent)	5.75%
Senior Notes | 5.375% Senior Notes due 2022 and 5.750% Senior Notes due 2025
Debt Instrument [Line Items]
Unamortized debt issuance costs			12,500,000				$ 10,400,000
Senior Notes | 4.875% Senior Notes due 2020 and 5.35% Senior Notes due 2023
Debt Instrument [Line Items]
Debt Issuance Costs, Net			11,600,000
Aggregate principal debt amount issued													$ 1,500,000,000
Senior Notes | 5.875% Senior Notes due 2026
Debt Instrument [Line Items]
Aggregate principal debt amount issued				$ 1,100,000,000
Interest rate (percent)				5.875%	5.875%	5.875%	5.875%
Long term debt, gross			1,100,000,000				$ 1,100,000,000
Unamortized debt issuance costs			15,100,000				13,400,000
Senior Notes | 2.875% Senior Notes Due 2025
Debt Instrument [Line Items]
Debt Issuance Costs, Net							$ 15,700,000
Aggregate principal debt amount issued | €								€ 1,000,000,000
Interest rate (percent)								2.875%
Unamortized debt issuance costs										$ 16,300,000
Senior Notes | 4.875% Senior Notes due 2020
Debt Instrument [Line Items]
Aggregate principal debt amount issued													$ 500,000,000
Interest rate (percent)					4.875%	4.875%	4.875%						4.875%
Long term debt, gross			500,000,000				$ 0		$ 500,000,000
Loss on debt extinguishment		$ (14,600,000)
Senior Notes | 5.375% Senior Notes due 2023
Debt Instrument [Line Items]
Debt Issuance Costs, Net							$ 7,100,000
Aggregate principal debt amount issued													$ 1,000,000,000
Interest rate (percent)					5.375%	5.375%	5.375%						5.375%
Long term debt, gross			$ 1,000,000,000				$ 1,000,000,000
Japanese Yen term loan | Japanese Yen term loan
Debt Instrument [Line Items]
Unamortized debt issuance costs						¥ 843.6	$ 7,500,000

Debt Facilities - Summary of 90

Debt Facilities - Summary of Senior Notes Redemption Price Percentage (Detail) - Senior Notes	12 Months Ended
	Dec. 31, 2017
5.375% Senior Notes due 2022 | Early Equity Redemption Price
Debt Instrument, Redemption [Line Items]
Redemption price, percentage	105.375%
5.375% Senior Notes due 2022 | First Scheduled Redemption Price
Debt Instrument, Redemption [Line Items]
Redemption price, percentage	104.031%
5.375% Senior Notes due 2022 | Second Year Redemption Price
Debt Instrument, Redemption [Line Items]
Redemption price, percentage	102.688%
5.375% Senior Notes due 2022 | Third Year Redemption Price
Debt Instrument, Redemption [Line Items]
Redemption price, percentage	101.344%
5.375% Senior Notes due 2022 | Fourth Year (if scheduled) Redemption Price
Debt Instrument, Redemption [Line Items]
Redemption price, percentage	100.00%
5.375% Senior Notes due 2023 | Early Equity Redemption Price
Debt Instrument, Redemption [Line Items]
Redemption price, percentage	105.375%
5.375% Senior Notes due 2023 | First Scheduled Redemption Price
Debt Instrument, Redemption [Line Items]
Redemption price, percentage	102.688%
5.375% Senior Notes due 2023 | Second Year Redemption Price
Debt Instrument, Redemption [Line Items]
Redemption price, percentage	101.792%
5.375% Senior Notes due 2023 | Third Year Redemption Price
Debt Instrument, Redemption [Line Items]
Redemption price, percentage	100.896%
5.375% Senior Notes due 2023 | Fourth Year (if scheduled) Redemption Price
Debt Instrument, Redemption [Line Items]
Redemption price, percentage	100.00%
5.750% Senior Notes due 2025 | Early Equity Redemption Price
Debt Instrument, Redemption [Line Items]
Redemption price, percentage	105.75%
5.750% Senior Notes due 2025 | First Scheduled Redemption Price
Debt Instrument, Redemption [Line Items]
Redemption price, percentage	102.875%
5.750% Senior Notes due 2025 | Second Year Redemption Price
Debt Instrument, Redemption [Line Items]
Redemption price, percentage	101.917%
5.750% Senior Notes due 2025 | Third Year Redemption Price
Debt Instrument, Redemption [Line Items]
Redemption price, percentage	100.958%
5.750% Senior Notes due 2025 | Fourth Year (if scheduled) Redemption Price
Debt Instrument, Redemption [Line Items]
Redemption price, percentage	100.00%
2.875% Euro Senior Notes due 2025 | Early Equity Redemption Price
Debt Instrument, Redemption [Line Items]
Redemption price, percentage	102.875%
2.875% Euro Senior Notes due 2025 | First Scheduled Redemption Price
Debt Instrument, Redemption [Line Items]
Redemption price, percentage	101.438%
2.875% Euro Senior Notes due 2025 | Second Year Redemption Price
Debt Instrument, Redemption [Line Items]
Redemption price, percentage	100.719%
2.875% Euro Senior Notes due 2025 | Third Year Redemption Price
Debt Instrument, Redemption [Line Items]
Redemption price, percentage	100.00%
5.875% Senior Notes due 2026 | Early Equity Redemption Price
Debt Instrument, Redemption [Line Items]
Redemption price, percentage	105.875%
5.875% Senior Notes due 2026 | First Scheduled Redemption Price
Debt Instrument, Redemption [Line Items]
Redemption price, percentage	102.938%
5.875% Senior Notes due 2026 | Second Year Redemption Price
Debt Instrument, Redemption [Line Items]
Redemption price, percentage	101.958%
5.875% Senior Notes due 2026 | Third Year Redemption Price
Debt Instrument, Redemption [Line Items]
Redemption price, percentage	100.979%
5.875% Senior Notes due 2026 | Fourth Year (if scheduled) Redemption Price
Debt Instrument, Redemption [Line Items]
Redemption price, percentage	100.00%
2.875% Euro Senior Notes due 2026 | Early Equity Redemption Price
Debt Instrument, Redemption [Line Items]
Redemption price, percentage	102.875%
2.875% Euro Senior Notes due 2026 | First Scheduled Redemption Price
Debt Instrument, Redemption [Line Items]
Redemption price, percentage	101.438%
2.875% Euro Senior Notes due 2026 | Second Year Redemption Price
Debt Instrument, Redemption [Line Items]
Redemption price, percentage	100.719%
2.875% Euro Senior Notes due 2026 | Third Year Redemption Price
Debt Instrument, Redemption [Line Items]
Redemption price, percentage	100.00%
5.375% Senior Notes due 2027 | Early Equity Redemption Price
Debt Instrument, Redemption [Line Items]
Redemption price, percentage	105.375%
5.375% Senior Notes due 2027 | First Scheduled Redemption Price
Debt Instrument, Redemption [Line Items]
Redemption price, percentage	102.688%
5.375% Senior Notes due 2027 | Second Year Redemption Price
Debt Instrument, Redemption [Line Items]
Redemption price, percentage	101.792%
5.375% Senior Notes due 2027 | Third Year Redemption Price
Debt Instrument, Redemption [Line Items]
Redemption price, percentage	100.896%
5.375% Senior Notes due 2027 | Fourth Year (if scheduled) Redemption Price
Debt Instrument, Redemption [Line Items]
Redemption price, percentage	100.00%

Debt Facilities - Loss on debt

Debt Facilities - Loss on debt Extinguishment (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Jun. 30, 2016	Mar. 31, 2013	Jun. 30, 2009
Debt Instrument [Line Items]
Loss on debt extinguishment	$ 65,772	$ 12,276	$ 289
4.75% convertible subordinated notes
Debt Instrument [Line Items]
Interest rate (percent)	4.75%	4.75%	4.75%	4.75%
Senior Notes | 4.875% Senior Notes due 2020
Debt Instrument [Line Items]
Loss on debt extinguishment	$ (14,600)
Interest rate (percent)	4.875%				4.875%
Redemption Premium	$ 12,200
Write off of Deferred Debt Issuance Cost	2,400
Amendments to leases and financing obligations
Debt Instrument [Line Items]
Loss on debt extinguishment	16,700
Settlement of financing obligations for property purchased
Debt Instrument [Line Items]
Loss on debt extinguishment	12,000
Convertible Subordinated Debt | 4.75% convertible subordinated notes
Debt Instrument [Line Items]
Loss on debt extinguishment			$ 300
Interest rate (percent)						4.75%
Term B-2 Loan Commitments | Revolving credit facility borrowings
Debt Instrument [Line Items]
Loss on debt extinguishment	13,200
Term B Loan Commitments | Revolving credit facility borrowings
Debt Instrument [Line Items]
Loss on debt extinguishment	$ 9,300

Debt Facilities - Summary of Ma

Debt Facilities - Summary of Maturities of Debt Facilities (Detail) $ in Thousands	Dec. 31, 2017USD ($)
Long-term Debt, Fiscal Year Maturity [Abstract]
2,018	$ 64,472
2,019	77,309
2,020	77,237
2,022	387,762
2,021	1,607,402
Thereafter	6,256,093
Total long term debt	$ 8,470,275

Debt Facilities - Fair Value of

Debt Facilities - Fair Value of Debt Facilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Debt Disclosure [Abstract]
Mortgage and loans payable	$ 1,464,877	$ 1,461,954
Senior notes	$ 7,288,673	$ 4,033,985

Debt Facilities - Interest Char

Debt Facilities - Interest Charges (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Debt Disclosure [Abstract]
Interest expense	$ 478,698,000	$ 392,156,000	$ 299,055,000
Interest capitalized	22,625,000	13,338,000	10,943,000
Interest charges incurred	501,323,000	405,494,000	309,998,000
Interest paid, net of capitalization interest	$ 422,168,000	$ 336,700,000	$ 226,500,000

Stockholders' Equity - Addition

Stockholders' Equity - Additional Information (Detail) - USD ($)	Aug. 02, 2017	Apr. 26, 2017	Feb. 15, 2017	Nov. 02, 2016	Aug. 03, 2016	May 04, 2016	Feb. 18, 2016	Oct. 28, 2015	Jul. 29, 2015	May 07, 2015	Feb. 19, 2015	Mar. 31, 2017	Jun. 30, 2016	Nov. 30, 2015	Sep. 30, 2015	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Aug. 31, 2017	Jun. 15, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock, shares authorized																300,000,000				300,000,000				300,000,000	300,000,000
Preferred stock, shares authorized																100,000,000				100,000,000				100,000,000	100,000,000
Preferred stock, shares issued																0				0				0	0
Preferred stock, shares outstanding																0				0				0	0
Issuance of common stock in public offering of common stock, shares												6,069,444		2,994,792
Issuance of common stock in public offering of common stock, net												$ 2,126,300,000		$ 829,500,000
Underwriting discounts and commissions incurred in issuance of common stock in public offering of common stock												$ 58,700,000		32,300,000
Shares issued in exchange for convertible subordinated notes													380,779
Issuance of common stock and release of treasury stock for the exchanges and conversions of 4.75% convertible debt																									$ 150,025,000	$ 7,884,000
Adjustments to APIC, convertible debt with conversion feature													$ 141,700,000
Share price (dollars per share)																												$ 372.10
Common Stock, Dividends, Per Share, Cash Paid																$ 2	$ 2	$ 2	$ 2	$ 1.75	$ 1.75	$ 1.75	$ 1.75	$ 8	$ 7
Dividends declared per share (in dollars per share)	$ 2	$ 2	$ 2	$ 1.75	$ 1.75	$ 1.75	$ 1.75	$ 1.69	$ 1.69	$ 1.69	$ 1.69													$ 8	$ 7	$ 17.71
Dividends distributions																								$ 612,085,000	$ 492,403,000	$ 393,584,000
Short term dividend payable																$ 11,181,000				$ 11,999,000				11,181,000	11,999,000
Long term dividend payable																6,669,000				8,495,000				$ 6,669,000	8,495,000
Payments of Stock Issuance Costs														$ 700,000
At The Market (ATM)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Sale of stock, equity offering agreement, authorized																											$ 750,000,000
Issuance of common stock in public offering of common stock, shares																								763,201
Issuance of common stock in public offering of common stock, net																								$ 355,082,000
Over-Allotment Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Issuance of common stock in public offering of common stock, shares												791,666		390,625
Special Distribution
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Special distribution, amount															$ 627,000,000
Special distribution, per share (in dollars per share)															$ 10.95
Special distribution, payable date															Nov. 10, 2015
Closing price measurement period (in days)															3 days
Value of shares distributed per share (in dollars per share)															$ 297.03
Common stock shares issued															1,688,411
Common stock issued amount															$ 125,500,000
Record date															Oct. 8, 2015
Short term dividend payable																11,200,000				12,000,000				11,200,000	12,000,000
Long term dividend payable																$ 6,700,000				$ 8,500,000				$ 6,700,000	$ 8,500,000
2013 Share Repurchase Program | Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Treasury stock re-issued (shares)																								6,073		7,348
Treasury stock re-issued																								$ 2,600,000		$ 1,800,000
4.75% convertible subordinated notes
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Interest rate (percent)													4.75%			4.75%				4.75%		4.75%		4.75%	4.75%	4.75%
Conversion of notes													$ 150,100,000
Conversion of notes, shares													1,981,662													101,947
Shares of common stock received, capped call, shares													380,779
Value of common stock received, capped call													$ 141,700,000
Average price of common stock shares repurchased (in dollars per share)													$ 372.10
4.75% convertible subordinated notes | 2013 Share Repurchase Program
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Treasury stock re-issued (shares)																									7,099	11,784
Treasury stock re-issued																									$ 2,400,000	$ 3,500,000
Series A
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Preferred stock, shares authorized																25,000,000								25,000,000
Series A-1
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Preferred stock, shares authorized																25,000,000								25,000,000
Undesignated
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Preferred stock, shares authorized																50,000,000								50,000,000

Stockholders' Equity - Schedule

Stockholders' Equity - Schedule of Reserve for Authorized but Unissued Shares of Common Stock (Detail)	Dec. 31, 2017shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common shares reserved for issuance	7,765,180
Common stock options and restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common shares reserved for issuance	4,499,389
Common stock employee purchase plans
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common shares reserved for issuance	3,265,791

Stockholders' Equity - Componen

Stockholders' Equity - Components of Accumulated Other Comprehensive Loss (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Accumulated Other Comprehensive Income (Loss) [Line Items]
AOCI, net of tax beginning balance	$ (949,142)
Foreign currency translation adjustment (CTA) gain (loss)	454,269	$ (507,420)	$ (186,763)
Unrealized gain (loss) on cash flow hedges(1)	(54,895)	19,551	4,550
Net investment hedge CTA gain (loss)(1)	(235,292)	45,505	4,484
Unrealized gain (loss) on available for sale securities(2)	14	2,249	(40)
Net actuarial loss on defined benefit plans(3)	(143)	32	1,153
Net Change	163,953	(440,083)	(176,616)
AOCI, net of tax ending balance	(785,189)	(949,142)
Foreign currency translation adjustment (CTA) loss
Accumulated Other Comprehensive Income (Loss) [Line Items]
AOCI, net of tax beginning balance	(1,031,129)	(523,709)	(336,946)
Foreign currency translation adjustment (CTA) gain (loss)	454,269	(507,420)	(186,763)
AOCI, net of tax ending balance	(576,860)	(1,031,129)	(523,709)
Unrealized gain (loss) on cash flow hedges
Accumulated Other Comprehensive Income (Loss) [Line Items]
AOCI, net of tax beginning balance	30,704	11,153	6,603
Unrealized gain (loss) on cash flow hedges(1)	(54,895)	19,551	4,550
AOCI, net of tax ending balance	(24,191)	30,704	11,153
Net investment hedge CTA gain (loss)
Accumulated Other Comprehensive Income (Loss) [Line Items]
AOCI, net of tax beginning balance	49,989	4,484	0
Net investment hedge CTA gain (loss)(1)	(235,292)	45,505	4,484
AOCI, net of tax ending balance	(185,303)	49,989	4,484
Unrealized gain (loss) on available for sale securities
Accumulated Other Comprehensive Income (Loss) [Line Items]
AOCI, net of tax beginning balance	2,110	(139)	(99)
Unrealized gain (loss) on available for sale securities(2)	14	2,249	(40)
AOCI, net of tax ending balance	2,124	2,110	(139)
Net actuarial loss on defined benefit plans
Accumulated Other Comprehensive Income (Loss) [Line Items]
AOCI, net of tax beginning balance	(816)	(848)	(2,001)
Net actuarial loss on defined benefit plans(3)	(143)	32	1,153
AOCI, net of tax ending balance	(959)	(816)	(848)
Comprehensive income
Accumulated Other Comprehensive Income (Loss) [Line Items]
AOCI, net of tax beginning balance	(949,142)	(509,059)	(332,443)
Net Change	163,953	(440,083)	(176,616)
AOCI, net of tax ending balance	$ (785,189)	$ (949,142)	$ (509,059)

Stockholders' Equity - Quarterl

Stockholders' Equity - Quarterly Dividend and Special Distributions (Detail) - $ / shares	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016
Equity [Abstract]
Total Distribution	$ 2	$ 2	$ 2	$ 2	$ 1.75	$ 1.75	$ 1.75	$ 1.75	$ 8	$ 7
Nonqualified Ordinary Dividend	2	2	2	2	1.231334	1.231334	1.231334	1.231334	8	4.925336
Qualified Ordinary Dividend	$ 0	$ 0	$ 0	$ 0	$ 0.518666	$ 0.518666	$ 0.518666	$ 0.518666	$ 0	$ 2.074664
Return of Capital	0	0	0	0	0	0	0	0	0	0

Stock-Based Compensation - Addi

Stock-Based Compensation - Additional Information (Detail) $ in Millions

Nov. 10, 2015shares

Nov. 25, 2014shares

Oct. 01, 2005

Sep. 30, 2005

May 31, 2011

May 31, 2010

Jun. 30, 2004shares

Sep. 30, 2001

May 31, 2000installment

Dec. 31, 2017USD ($)shares

Dec. 31, 2016USD ($)

Dec. 31, 2015USD ($)

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Share-based compensation expense not yet recognized | $

$ 296.7

Expected recognized period (in years)

2 years 29 days

Capitalized stock-based compensation expense | $

$ 6.2

$ 4.2

$ 3

2000 Equity Incentive Plan

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Percentage of fair market value of common stock on the grant date

85.00%

100.00%

Stock option expiration from grant date

7 years

10 years

Vesting period (in years)

4 years

Number of shares in reserve

16,636,172

Number of shares available for grant

2,423,051

2000 Director Option Plan

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Percentage of fair market value of common stock on the grant date

100.00%

Stock option expiration from grant date

10 years

Number of shares in reserve

594,403

Number of shares available for grant

505,646

Number of Installments | installment

4

2001 Supplemental Stock Plan

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Stock option expiration from grant date

7 years

10 years

Vesting period (in years)

4 years

Number of shares in reserve

1,494,275

Number of shares available for grant

260,498

Minimum percentage of fair value of grant

85.00%

Common stock employee purchase plans

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Number of shares in reserve

500,000

Number of shares available for grant

3,265,791

Yearly increase in shares available for grant (percent)

2.00%

Number of additional shares authorized

9,020

3,197

Percentage of purchase price reductions

15.00%

Offering period (in months)

24 months

Offering interval (in months)

6 months

Purchase discount from market price (percent)

85.00%

Restricted Stock Units

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Restricted stock units vested and released, net | $

$ 259.1

$ 227.4

$ 157.6

Stock-Based Compensation - Summ

Stock-Based Compensation - Summary of Stock Option Activity (Detail) - Equinix Equity Awards - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Stock options outstanding, beginning balance (in shares)	19,066	37,249	77,934
Stock options exercised (in shares)	(12,763)	(18,183)	(41,889)
Stock options, additional shares granted due to special distribution (in shares)			1,454
Stock options expired (in shares)			(250)
Stock options outstanding, ending balance (in shares)	6,303	19,066	37,249
Stock options vested and exercisable, outstanding	6,303
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]
Stock options outstanding, weighted average exercise price per share, beginning balance (in dollars per share)	$ 82.01	$ 82.06	$ 73.84
Stock options exercised, weighted average exercise price per share (in dollars per share)	83.51	80.10	64.18
Stock options, additional shares granted due to special distribution, weighted average exercise price per share (in dollars per share)			0
Stock options canceled, weighted average exercise price per share (in dollars per share)			41.12
Stock options outstanding weighted average exercise price per share, ending balance (in dollars per share)	78.97	$ 82.01	$ 82.06
Stock options vested and exercisable, weighted average exercise price per share (in dollars per share)	$ 78.97
Stock options outstanding, weighted average remaining contractual life (years)	6 months 26 days
Stock options vested and exercisable, weighted average remaining contractual life (years)	6 months 26 days
Stock options outstanding, aggregate intrinsic value	$ 2,359
Stock options vested and exercisable, aggregate intrinsic value	$ 2,359

Stock-Based Compensation - Sche

Stock-Based Compensation - Schedule of Outstanding Stock Options (Detail)	12 Months Ended
	Dec. 31, 2017$ / sharesshares
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Outstanding options, number of shares | shares	6,303
Outstanding options, weighted average remaining contractual life (years)	6 months 26 days
Outstanding options, weighted-average exercise price (in dollars per share)	$ 78.97
Exercisable options, number of shares | shares	6,303
Exercisable options, weighted-average exercise price (in dollars per share)	$ 78.97
$28.56 to $28.56
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price lower range (in dollars per share)	28.56
Exercise price upper range (in dollars per share)	$ 28.56
Outstanding options, number of shares | shares	1,007
Outstanding options, weighted average remaining contractual life (years)	1 year 2 months 5 days
Outstanding options, weighted-average exercise price (in dollars per share)	$ 28.56
Exercisable options, number of shares | shares	1,007
Exercisable options, weighted-average exercise price (in dollars per share)	$ 28.56
$88.56 to $88.56
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price lower range (in dollars per share)	88.56
Exercise price upper range (in dollars per share)	$ 88.56
Outstanding options, number of shares | shares	5,296
Outstanding options, weighted average remaining contractual life (years)	5 months 12 days
Outstanding options, weighted-average exercise price (in dollars per share)	$ 88.56
Exercisable options, number of shares | shares	5,296
Exercisable options, weighted-average exercise price (in dollars per share)	$ 88.56

Stock-Based Compensation - S102

Stock-Based Compensation - Schedule of Additional Disclosure for Stock Options (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Total aggregate intrinsic value of stock options exercised	$ 3,818	$ 4,712	$ 7,198

Stock-Based Compensation - S103

Stock-Based Compensation - Summary of Restricted Stock Unit Activity (Detail) - Restricted Stock Units - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Restricted stock units outstanding, beginning balance (in shares)	1,347,879	1,416,438	1,403,974
Restricted stock units granted (in shares)	658,196	720,601	711,990
Restricted stock units, additional shares granted due to special distribution (in shares)		37	51,432
Restricted stock units released, vested (in shares)	(606,064)	(655,584)	(623,554)
Special distribution shares released (in shares)	(15,667)	(35,354)	(19,966)
Restricted stock units canceled (in shares)	(79,451)	(93,940)	(103,922)
Special distribution shares canceled (in shares)	(1,002)	(4,319)	(3,516)
Restricted stock units outstanding, ending balance (in shares)	1,303,891	1,347,879	1,416,438
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Restricted stock units outstanding, weighted-average grant date fair value, beginning balance (in dollars per share)	$ 192.59	$ 148.53	$ 114.56
Restricted stock units granted, weighted-average grant date fair value (in dollars per share)	389.60	309.18	236.89
Restricted stock units, additional stock units granted due to special distribution, weighted-average grant date fair value (in dollars per share)		297.03	297.03
Restricted stock units released, vested, weighted-average grant date fair value (in dollars per share)	260.75	213.72	173.79
Special distribution shares released, weighted-average grant date fair value (in dollars per share)	243.06	269.94	227.99
Restricted stock units canceled, weighted-average grant date fair value (in dollars per share)	313.83	242.41	198.67
Special distribution shares canceled, weighted-average grant date fair value (in dollars per share)	282.49	272.84	235.43
Restricted stock units outstanding, weighted-average grant date fair value, ending balance (in dollars per share)	$ 252.30	$ 192.59	$ 148.53
Restricted stock units outstanding, weighted-average remaining contractual life (years)	1 year 2 months 19 days
Restricted stock units outstanding, aggregate intrinsic value	$ 590,950

Stock-Based Compensation - Disc

Stock-Based Compensation - Disclosures for 2004 Purchase Plan (Detail) - $ / shares	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Weighted-average purchase price per share	$ 250.65	$ 217.91	$ 150.13
Weighted average grant-date fair value per share of shares purchased	$ 72.21	$ 60.49	$ 57.63
Number of shares purchased	162,076	150,044	182,175

Stock-Based Compensation - Assu

Stock-Based Compensation - Assumptions in Computation of Fair Value (Detail) - Employee stock purchase plan	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted-average expected volatility	20.30%	25.01%	21.72%
Weighted average expected life (in years)	1 year 6 months 7 days	1 year 4 months 28 days	1 year 7 months 2 days
Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Range of dividend yield	2.10%	2.38%	2.65%
Range of risk-free interest rate	0.70%	0.48%	0.08%
Range of expected volatility	16.42%	18.80%	19.96%
Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Range of dividend yield	2.31%	2.53%	2.81%
Range of risk-free interest rate	1.35%	0.76%	0.77%
Range of expected volatility	24.27%	30.94%	25.78%

Stock-Based Compensation - Stoc

Stock-Based Compensation - Stock-Based Compensation Expense Recognized in Company's Consolidated Statement of Operations (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Stock-based compensation expense	$ 175,500	$ 156,148	$ 133,633
Stock options
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Stock-based compensation expense	0	0	1,679
Restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Stock-based compensation expense	164,321	145,769	124,512
Employee stock purchase plan
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Stock-based compensation expense	11,179	10,379	7,442
Cost of revenues
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Stock-based compensation expense	13,621	13,086	9,878
Sales and marketing
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Stock-based compensation expense	50,094	43,030	36,847
General and administrative
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Stock-based compensation expense	$ 111,785	$ 100,032	$ 86,908

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Tax Contingency [Line Items]
Net operating loss carryforwards that will not be available to offset			$ 242,000
Federal income tax rate (percent)			35.00%	35.00%	35.00%
Tax Cuts and Jobs Act of 2017, change in tax rate, deferred tax asset, provisional income tax expense			$ 6,500
Tax Cuts and Jobs Act of 2017, incomplete accounting, transition tax for accumulated foreign earnings, provisional income tax expense			$ 195,000
Income tax rate at full distribution of taxable income (percent)			0.00%
Percetage of taxable income distributed			100.00%
Tax basis of REIT assets in excess of balance sheet			$ 1,390,100
NOL carryforward, annual limitation on use			800
Operating loss carryforwards			615,951
Unrecognized tax benefits, interest and penalties accrued	$ 4,400		2,900	$ 4,400
Unrecognized tax benefits that would impact effective tax rate			82,400
Foreign earnings repatriated	$ 63,700
Tax Periods Prior to 2003
Income Tax Contingency [Line Items]
Operating loss carryforwards			16,400
Federal
Income Tax Contingency [Line Items]
Net operating loss carryforwards that will not be available to offset			241,800
Operating loss carryforwards			311,332
State
Income Tax Contingency [Line Items]
Net operating loss carryforwards that will not be available to offset			200
Operating loss carryforwards			$ 20,150
Forecast
Income Tax Contingency [Line Items]
Federal income tax rate (percent)		21.00%

Income Taxes - Income from Cont

Income Taxes - Income from Continuing Operations before Income Taxes Attributable to Geographic Locations (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Tax Disclosure [Abstract]
Domestic	$ 148,500	$ 215,010	$ 123,153
Foreign	138,332	(55,151)	87,845
Income from continuing operations before income taxes	$ 286,832	$ 159,859	$ 210,998

Income Taxes - Components of Ta

Income Taxes - Components of Tax Benefit (Expenses) for Income Taxes from Continuing Operations (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Current:
Federal	$ 9,346	$ (16,365)	$ (85,352)
State and local	(849)	(2,147)	(3,984)
Foreign	(109,032)	(62,278)	(27,090)
Subtotal	(100,535)	(80,790)	(116,426)
Deferred:
Federal	9,684	(11,184)	87,801
State and local	2,018	(3,328)	4,600
Foreign	34,983	49,851	801
Subtotal	46,685	35,339	93,202
Provision for income taxes	$ (53,850)	$ (45,451)	$ (23,224)

Income Taxes - Income Tax Recon

Income Taxes - Income Tax Reconciliation (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Tax Disclosure [Abstract]
Federal tax at statutory rate	$ (100,391)	$ (55,951)	$ (73,849)
State and local tax (expense) benefit	1,000	(4,895)	945
Deferred tax assets generated in current year not benefited	(7,643)	(6,246)	(4,916)
Foreign income tax rate differential	26,151	22,016	30,387
Non-deductible expenses	(2,629)	(15,828)	(14,252)
Stock-based compensation expense	(616)	(5,890)	(3,922)
Change in valuation allowance	(716)	11,995	710
Foreign financing activities	1,319	(26,708)	2,592
Loss on debt extinguishment	(1,604)	(8,288)	0
Gain on divestments	0	8,828	0
Uncertain tax positions reserve	(66)	(9,371)	(3,191)
Tax adjustments related to REIT	41,973	45,060	45,823
Enactment of the US tax reform	(6,513)	0	0
Other, net	(4,115)	(173)	(3,551)
Provision for income taxes	$ (53,850)	$ (45,451)	$ (23,224)

Income Taxes - Schedule of Defe

Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Deferred tax assets:
Reserves and accruals	$ 27,673	$ 11,276
Stock-based compensation expense	1,960	1,752
Unrealized losses	10,768	0
Operating loss carryforwards	95,864	37,594
Others, net	0	5
Gross deferred tax assets	136,265	50,627
Valuation allowance	(84,573)	(29,167)	$ (29,894)	$ (27,181)
Total deferred tax assets, net	51,692	21,460
Deferred tax liabilities:
Property, plant and equipment	(65,825)	(57,006)
Unrealized gains	0	(7,832)
Intangible assets	(172,123)	(168,655)
Total deferred tax liabilities	(237,948)	(233,493)
Net deferred tax liabilities	$ (186,256)	$ (212,033)

Income Taxes - Changes in Valua

Income Taxes - Changes in Valuation Allowance for Deferred Tax Assets (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Movement in Valuation Allowances and Reserves [Roll Forward]
Beginning balance	$ 29,167	$ 29,894	$ 27,181
Amounts from acquisitions	25,283	5,053	0
Amounts recognized into income	716	(11,995)	(710)
Current increase	28,431	6,557	4,513
Impact of foreign currency exchange	(976)	342	1,090
Ending balance	$ 84,573	$ 29,167	$ 29,894

Income Taxes - Schedule of Net

Income Taxes - Schedule of Net Operating Loss Carryforwards (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2017USD ($)
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	$ 615,951
Net operating loss carryforwards that will not be available to offset	242,000
2,018
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	11,730
2019 to 2021
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	207,237
2022 to 2024
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	51,121
2025 to 2027
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	22,430
2031 to 2033
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	767
Thereafter
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	322,666
Federal
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	311,332
Net operating loss carryforwards that will not be available to offset	241,800
Federal | 2018
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	0
Federal | 2019 to 2021
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	190,125
Federal | 2022 to 2024
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	46,827
Federal | 2025 to 2027
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	13,005
Federal | 2031 to 2033
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	0
Federal | Thereafter
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	61,375
State
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	20,150
Net operating loss carryforwards that will not be available to offset	200
State | 2018
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	0
State | 2019 to 2021
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	474
State | 2022 to 2024
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	0
State | 2025 to 2027
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	0
State | 2031 to 2033
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	767
State | Thereafter
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	18,909
Foreign
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	284,469
Foreign | 2018
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	11,730
Foreign | 2019 to 2021
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	16,638
Foreign | 2022 to 2024
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	4,294
Foreign | 2025 to 2027
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	9,425
Foreign | 2031 to 2033
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	0
Foreign | Thereafter
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	$ 242,382

Income Taxes - Reconciliation o

Income Taxes - Reconciliation of Unrecognized Tax Benefits (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Beginning balance	$ 72,187	$ 30,845	$ 36,138
Gross increases related to prior year tax positions	6,095	570	0
Gross decreases related to prior year tax positions	0	0	(8,645)
Gross increases related to current year tax positions	19,832	41,972	4,802
Decreases resulting from expiration of statute of limitation	(15,410)	(826)	(1,450)
Decreases resulting from settlements	(314)	(374)	0
Ending balance	$ 82,390	$ 72,187	$ 30,845

Commitments and Contingencies (

Commitments and Contingencies (Detail)	Dec. 31, 2017USD ($)Claims
Other Commitments [Line Items]
Number of pending claims | Claims	0
Indemnification of officers and directors
Other Commitments [Line Items]
Liabilities under guarantor agreements	$ 0
General indemnification
Other Commitments [Line Items]
Liabilities under guarantor agreements	0
Indemnification of business partners
Other Commitments [Line Items]
Liabilities under guarantor agreements	0
Service level credits
Other Commitments [Line Items]
Liabilities under guarantor agreements	0
Capital expenditures
Other Commitments [Line Items]
Purchase commitments	508,200,000
Miscellaneous purchase commitments
Other Commitments [Line Items]
Purchase commitments	$ 643,600,000

Related Party Transactions - Ac

Related Party Transactions - Activity of Related Party Transactions (Detail) - USD ($) $ in Thousands	Feb. 10, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Related Party Transactions [Abstract]
Revenues		$ 13,726	$ 11,822	$ 10,745
Costs and services		11,211	14,574	$ 10,808
Accounts receivable		1,321	1,109
Accounts payable		$ 744	$ 1,720
Land and building | Prologis, L.P.
Related Party Transaction [Line Items]
Related party transaction, purchases from related party	$ 6,300

Segment Information - Additiona

Segment Information - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2017Segment
Segment Reporting [Abstract]
Number of reportable segments	3

Segment Information - Schedule

Segment Information - Schedule of Adjusted EBITDA (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Segment Reporting Information [Line Items]
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	0	(7,698)	0
Gain on asset sales	0	32,816	0
Income from operations	809,014	618,739	567,342
Americas
Segment Reporting Information [Line Items]
Adjusted EBITDA	1,034,694	787,311	698,604
EMEA
Segment Reporting Information [Line Items]
Adjusted EBITDA	582,697	494,263	318,561
Asia-Pacific
Segment Reporting Information [Line Items]
Adjusted EBITDA	$ 434,650	$ 375,900	$ 254,462

Segment Information - Segment D

Segment Information - Segment Disclosures (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Segment Reporting Information [Line Items]
Total revenues	$ 4,368,428	$ 3,611,989	$ 2,725,867
Total depreciation and amortization	1,042,480	837,207	525,580
Capital expenditures	1,378,725	1,113,365	868,120
Americas
Segment Reporting Information [Line Items]
Total revenues	2,172,760	1,679,549	1,512,535
Total depreciation and amortization	515,726	319,202	278,216
Capital expenditures	621,158	503,855	401,685
EMEA
Segment Reporting Information [Line Items]
Total revenues	1,346,256	1,171,339	698,807
Total depreciation and amortization	316,250	313,291	117,655
Capital expenditures	555,346	400,642	202,322
Asia-Pacific
Segment Reporting Information [Line Items]
Total revenues	849,412	761,101	514,525
Total depreciation and amortization	210,504	204,714	129,709
Capital expenditures	202,221	208,868	264,113
U.S.
Segment Reporting Information [Line Items]
Total revenues	$ 2,000,000	$ 1,500,000	$ 1,400,000

Segment Information - Long-Live

Segment Information - Long-Lived Assets (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Revenues from External Customers and Long-Lived Assets [Line Items]
Property, plant and equipment	$ 9,394,602	$ 7,199,210
Americas
Revenues from External Customers and Long-Lived Assets [Line Items]
Property, plant and equipment	4,425,077	3,339,518
EMEA
Revenues from External Customers and Long-Lived Assets [Line Items]
Property, plant and equipment	3,265,088	2,355,943
Asia-Pacific
Revenues from External Customers and Long-Lived Assets [Line Items]
Property, plant and equipment	1,704,437	1,503,749
U.S.
Revenues from External Customers and Long-Lived Assets [Line Items]
Property, plant and equipment	$ 4,000,000	$ 3,000,000

Segment Information - Revenue I

Segment Information - Revenue Information by Category (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Revenue from External Customer [Line Items]
Revenues	$ 4,368,428	$ 3,611,989	$ 2,725,867
Recurring revenues
Revenue from External Customer [Line Items]
Revenues	4,120,120	3,417,374	2,569,141
Recurring revenues | Colocation
Revenue from External Customer [Line Items]
Revenues	3,178,145	2,647,094	2,019,875
Recurring revenues | Interconnection
Revenue from External Customer [Line Items]
Revenues	681,173	543,045	441,749
Recurring revenues | Managed infrastructure
Revenue from External Customer [Line Items]
Revenues	245,169	210,292	96,836
Recurring revenues | Rental
Revenue from External Customer [Line Items]
Revenues	15,633	16,943	10,681
Non-recurring revenues
Revenue from External Customer [Line Items]
Revenues	$ 248,308	$ 194,615	$ 156,726

Subsequent Events - Additional

Subsequent Events - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Millions	Feb. 14, 2018	Aug. 02, 2017	Apr. 26, 2017	Feb. 15, 2017	Nov. 02, 2016	Aug. 03, 2016	May 04, 2016	Feb. 18, 2016	Oct. 28, 2015	Jul. 29, 2015	May 07, 2015	Feb. 19, 2015	Jun. 30, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Subsequent Event [Line Items]
Dividends declared per share (in dollars per share)		$ 2	$ 2	$ 2	$ 1.75	$ 1.75	$ 1.75	$ 1.75	$ 1.69	$ 1.69	$ 1.69	$ 1.69		$ 8	$ 7	$ 17.71
Subsequent event
Subsequent Event [Line Items]
Dividends declared per share (in dollars per share)	$ 2.28
Forecast | Infomart Dallas [Member]
Subsequent Event [Line Items]
Cash consideration for acquisition													$ 31
Aggregate principal debt amount issued													$ 750
Interest rate (percent)													5.00%

Quarterly Financial Informat123

Quarterly Financial Information (Unaudited) (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Quarterly Financial Information Disclosure [Abstract]
Revenues	$ 1,200,221	$ 1,152,261	$ 1,066,421	$ 949,525	$ 942,647	$ 924,676	$ 900,510	$ 844,156
Gross profit	580,596	569,901	544,218	480,564	476,726	454,374	443,543	416,476
Net income (loss)	$ 65,215	$ 79,900	$ 45,805	$ 42,062	$ 61,750	$ 51,450	$ 44,711	$ (31,111)	$ 232,982	$ 126,800	$ 187,774
Earnings per share (EPS):
Basic EPS (in dollars per share)	$ 0.83	$ 1.02	$ 0.59	$ 0.58	$ 0.86	$ 0.73	$ 0.64	$ (0.46)	$ 3.03	$ 1.81	$ 3.25
Diluted EPS (in dollars per share)	$ 0.82	$ 1.02	$ 0.58	$ 0.57	$ 0.86	$ 0.72	$ 0.64	$ (0.46)	$ 3	$ 1.79	$ 3.21

Schedule III Real Estate and124

Schedule III Real Estate and Accumulated Depreciation - Real Estate and Accumulated Depreciation, by Property (Detail) - USD ($)	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Initial Costs to Company
Encumbrances	$ 30,310,000
Land	298,830,000
Buildings and Improvements	3,058,446,000
Costs Capitalized Subsequent to Acquisition or Lease
Land	124,706,000
Buildings and Improvements	9,465,753,000
Total Costs
Land	423,536,000
Buildings and Improvements	12,524,199,000
Accumulated Depreciation	(3,980,198,000)	$ (3,175,972,000)	$ (2,595,648,000)	$ (2,242,345,000)
Taxable basis in aggregate initial cost	17,901,900,000
Operating Lease [Member]
Total Costs
Initial cost	0
Americas | AT1 ATLANTA (METRO)
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	123,655,000
Total Costs
Land	0
Buildings and Improvements	123,655,000
Accumulated Depreciation	(42,278,000)
Americas | AT2 ATLANTA (METRO)
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	42,574,000
Total Costs
Land	0
Buildings and Improvements	42,574,000
Accumulated Depreciation	(20,048,000)
Americas | AT3 ATLANTA (METRO)
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	4,095,000
Total Costs
Land	0
Buildings and Improvements	4,095,000
Accumulated Depreciation	(1,678,000)
Americas | AT4 ATLANTA (METRO)
Initial Costs to Company
Encumbrances	0
Land	5,400,000
Buildings and Improvements	20,209,000
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	1,823,000
Total Costs
Land	5,400,000
Buildings and Improvements	22,032,000
Accumulated Depreciation	(2,955,000)
Americas | AT5 ATLANTA (METRO)
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	5,011,000
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	1,552,000
Total Costs
Land	0
Buildings and Improvements	6,563,000
Accumulated Depreciation	(1,029,000)
Americas | BG1 BOGOTÁ (METRO), COLOMBIA
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	8,779,000
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	409,000
Total Costs
Land	0
Buildings and Improvements	9,188,000
Accumulated Depreciation	(769,000)
Americas | BO1 BOSTON (METRO)
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	11,185,000
Total Costs
Land	0
Buildings and Improvements	11,185,000
Accumulated Depreciation	(6,713,000)
Americas | BO2 BOSTON (METRO)
Initial Costs to Company
Encumbrances	0
Land	2,500,000
Buildings and Improvements	30,383,000
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	214,000
Total Costs
Land	2,500,000
Buildings and Improvements	30,597,000
Accumulated Depreciation	(2,917,000)
Americas | CH1 CHICAGO (METRO)
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	161,324,000
Total Costs
Land	0
Buildings and Improvements	161,324,000
Accumulated Depreciation	(103,562,000)
Americas | CH2 CHICAGO (METRO)
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	108,257,000
Total Costs
Land	0
Buildings and Improvements	108,257,000
Accumulated Depreciation	(53,744,000)
Americas | CH3 CHICAGO (METRO)
Initial Costs to Company
Encumbrances	0
Land	9,759,000
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition or Lease
Land	351,000
Buildings and Improvements	279,869,000
Total Costs
Land	10,110,000
Buildings and Improvements	279,869,000
Accumulated Depreciation	(99,791,000)
Americas | CH4 CHICAGO (METRO)
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	21,976,000
Total Costs
Land	0
Buildings and Improvements	21,976,000
Accumulated Depreciation	(9,792,000)
Americas | CH7 CHICAGO (METRO)
Initial Costs to Company
Encumbrances	0
Land	670,000
Buildings and Improvements	10,564,000
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	88,000
Total Costs
Land	670,000
Buildings and Improvements	10,652,000
Accumulated Depreciation	(1,046,000)
Americas | CU1 CULPEPER (METRO)
Initial Costs to Company
Encumbrances	0
Land	1,019,000
Buildings and Improvements	37,581,000
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	311,000
Total Costs
Land	1,019,000
Buildings and Improvements	37,892,000
Accumulated Depreciation	(2,788,000)
Americas | CU2 CULPEPER (METRO)
Initial Costs to Company
Encumbrances	0
Land	1,244,000
Buildings and Improvements	48,000,000
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	367,000
Total Costs
Land	1,244,000
Buildings and Improvements	48,367,000
Accumulated Depreciation	(3,254,000)
Americas | CU3 CULPEPER (METRO)
Initial Costs to Company
Encumbrances	0
Land	1,088,000
Buildings and Improvements	37,387,000
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	54,000
Total Costs
Land	1,088,000
Buildings and Improvements	37,441,000
Accumulated Depreciation	(2,437,000)
Americas | CU4 CULPEPER (METRO)
Initial Costs to Company
Encumbrances	0
Land	1,372,000
Buildings and Improvements	27,832,000
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	1,963,000
Total Costs
Land	1,372,000
Buildings and Improvements	29,795,000
Accumulated Depreciation	(1,285,000)
Americas | DA1 DALLAS (METRO)
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	74,900,000
Total Costs
Land	0
Buildings and Improvements	74,900,000
Accumulated Depreciation	(48,583,000)
Americas | DA2 DALLAS (METRO)
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	78,659,000
Total Costs
Land	0
Buildings and Improvements	78,659,000
Accumulated Depreciation	(21,955,000)
Americas | DA3 DALLAS (METRO)
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	92,408,000
Total Costs
Land	0
Buildings and Improvements	92,408,000
Accumulated Depreciation	(30,450,000)
Americas | DA4 DALLAS (METRO)
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	18,010,000
Total Costs
Land	0
Buildings and Improvements	18,010,000
Accumulated Depreciation	(8,616,000)
Americas | DA6 DALLAS (METRO)
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	20,522,000
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	110,282,000
Total Costs
Land	0
Buildings and Improvements	130,804,000
Accumulated Depreciation	(16,735,000)
Americas | DA7 DALLAS (METRO)
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	26,888,000
Total Costs
Land	0
Buildings and Improvements	26,888,000
Accumulated Depreciation	(4,964,000)
Americas | DA9 DALLAS (METRO)
Initial Costs to Company
Encumbrances	0
Land	610,000
Buildings and Improvements	15,398,000
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	89,000
Total Costs
Land	610,000
Buildings and Improvements	15,487,000
Accumulated Depreciation	(1,191,000)
Americas | DA10 DALLAS (METRO)
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	117,000
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	4,535,000
Total Costs
Land	0
Buildings and Improvements	4,652,000
Accumulated Depreciation	(349,000)
Americas | DC1 WASHINGTON, DC (METRO)
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	2,435,000
Total Costs
Land	0
Buildings and Improvements	2,435,000
Accumulated Depreciation	(574,000)
Americas | DC2 WASHINGTON, DC (METRO)
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition or Lease
Land	5,047,000
Buildings and Improvements	158,709,000
Total Costs
Land	5,047,000
Buildings and Improvements	158,709,000
Accumulated Depreciation	(128,668,000)
Americas | DC3 WASHINGTON, DC (METRO)
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	37,451,000
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	53,210,000
Total Costs
Land	0
Buildings and Improvements	90,661,000
Accumulated Depreciation	(49,386,000)
Americas | DC4 WASHINGTON, DC (METRO)
Initial Costs to Company
Encumbrances	0
Land	1,906,000
Buildings and Improvements	7,272,000
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	72,961,000
Total Costs
Land	1,906,000
Buildings and Improvements	80,233,000
Accumulated Depreciation	(49,250,000)
Americas | DC5 WASHINGTON, DC (METRO)
Initial Costs to Company
Encumbrances	0
Land	1,429,000
Buildings and Improvements	4,983,000
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	89,024,000
Total Costs
Land	1,429,000
Buildings and Improvements	94,007,000
Accumulated Depreciation	(57,411,000)
Americas | DC6 WASHINGTON, DC (METRO)
Initial Costs to Company
Encumbrances	0
Land	1,429,000
Buildings and Improvements	5,082,000
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	87,709,000
Total Costs
Land	1,429,000
Buildings and Improvements	92,791,000
Accumulated Depreciation	(39,873,000)
Americas | DC7 WASHINGTON, DC (METRO)
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	20,851,000
Total Costs
Land	0
Buildings and Improvements	20,851,000
Accumulated Depreciation	(11,503,000)
Americas | DC8 WASHINGTON, DC (METRO)
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	5,185,000
Total Costs
Land	0
Buildings and Improvements	5,185,000
Accumulated Depreciation	(4,739,000)
Americas | DC10 WASHINGTON, DC (METRO)
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	44,601,000
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	71,706,000
Total Costs
Land	0
Buildings and Improvements	116,307,000
Accumulated Depreciation	(41,225,000)
Americas | DC11 WASHINGTON, DC (METRO)
Initial Costs to Company
Encumbrances	0
Land	1,429,000
Buildings and Improvements	5,082,000
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	175,361,000
Total Costs
Land	1,429,000
Buildings and Improvements	180,443,000
Accumulated Depreciation	(30,071,000)
Americas | DC12 WASHINGTON, DC (METRO)
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	101,783,000
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	19,101,000
Total Costs
Land	0
Buildings and Improvements	120,884,000
Accumulated Depreciation	(1,869,000)
Americas | DC13 WASHINGTON, DC (METRO)
Initial Costs to Company
Encumbrances	0
Land	5,500,000
Buildings and Improvements	25,423,000
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	364,000
Total Costs
Land	5,500,000
Buildings and Improvements	25,787,000
Accumulated Depreciation	(3,015,000)
Americas | DC14 WASHINGTON, DC (METRO)
Initial Costs to Company
Encumbrances	0
Land	2,560,000
Buildings and Improvements	33,511,000
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	206,000
Total Costs
Land	2,560,000
Buildings and Improvements	33,717,000
Accumulated Depreciation	(2,330,000)
Americas | DC97 WASHINGTON, DC (METRO)
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	2,021,000
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	141,000
Total Costs
Land	0
Buildings and Improvements	2,162,000
Accumulated Depreciation	(259,000)
Americas | DE1 DENVER (METRO)
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	10,260,000
Total Costs
Land	0
Buildings and Improvements	10,260,000
Accumulated Depreciation	(7,172,000)
Americas | DE2 DENVER (METRO)
Initial Costs to Company
Encumbrances	0
Land	5,240,000
Buildings and Improvements	23,053,000
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	14,764,000
Total Costs
Land	5,240,000
Buildings and Improvements	37,817,000
Accumulated Depreciation	(3,814,000)
Americas | HO1 HOUSTON (METRO)
Initial Costs to Company
Encumbrances	0
Land	1,440,000
Buildings and Improvements	23,780,000
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	3,996,000
Total Costs
Land	1,440,000
Buildings and Improvements	27,776,000
Accumulated Depreciation	(2,679,000)
Americas | LA1 LOS ANGELES (METRO)
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	112,209,000
Total Costs
Land	0
Buildings and Improvements	112,209,000
Accumulated Depreciation	(64,914,000)
Americas | LA2 LOS ANGELES (METRO)
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	11,066,000
Total Costs
Land	0
Buildings and Improvements	11,066,000
Accumulated Depreciation	(8,887,000)
Americas | LA3 LOS ANGELES (METRO)
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	34,727,000
Costs Capitalized Subsequent to Acquisition or Lease
Land	3,959,000
Buildings and Improvements	24,296,000
Total Costs
Land	3,959,000
Buildings and Improvements	59,023,000
Accumulated Depreciation	(45,521,000)
Americas | LA4 LOS ANGELES (METRO)
Initial Costs to Company
Encumbrances	0
Land	19,333,000
Buildings and Improvements	137,630,000
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	29,032,000
Total Costs
Land	19,333,000
Buildings and Improvements	166,662,000
Accumulated Depreciation	(68,944,000)
Americas | LA7 LOS ANGELES (METRO)
Initial Costs to Company
Encumbrances	0
Land	7,800,000
Buildings and Improvements	33,621,000
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	124,000
Total Costs
Land	7,800,000
Buildings and Improvements	33,745,000
Accumulated Depreciation	(2,544,000)
Americas | MI1 MIAMI (METRO)
Initial Costs to Company
Encumbrances	0
Land	18,920,000
Buildings and Improvements	127,194,000
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	31,502,000
Total Costs
Land	18,920,000
Buildings and Improvements	158,696,000
Accumulated Depreciation	(11,253,000)
Americas | MI2 MIAMI (METRO)
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	25,776,000
Total Costs
Land	0
Buildings and Improvements	25,776,000
Accumulated Depreciation	(11,815,000)
Americas | MI3 MIAMI (METRO)
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	31,148,000
Total Costs
Land	0
Buildings and Improvements	31,148,000
Accumulated Depreciation	(10,329,000)
Americas | MI6 MIAMI (METRO)
Initial Costs to Company
Encumbrances	0
Land	4,750,000
Buildings and Improvements	23,017,000
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	1,538,000
Total Costs
Land	4,750,000
Buildings and Improvements	24,555,000
Accumulated Depreciation	(2,231,000)
Americas | NY1 NEW YORK (METRO)
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	80,528,000
Total Costs
Land	0
Buildings and Improvements	80,528,000
Accumulated Depreciation	(45,712,000)
Americas | NY2 NEW YORK (METRO)
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition or Lease
Land	17,859,000
Buildings and Improvements	199,508,000
Total Costs
Land	17,859,000
Buildings and Improvements	199,508,000
Accumulated Depreciation	(125,823,000)
Americas | NY4 NEW YORK (METRO)
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	338,384,000
Total Costs
Land	0
Buildings and Improvements	338,384,000
Accumulated Depreciation	(167,338,000)
Americas | NY5 NEW YORK (METRO)
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	254,899,000
Total Costs
Land	0
Buildings and Improvements	254,899,000
Accumulated Depreciation	(50,791,000)
Americas | NY6 NEW YORK (METRO)
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	73,350,000
Total Costs
Land	0
Buildings and Improvements	73,350,000
Accumulated Depreciation	(8,658,000)
Americas | NY7 NEW YORK (METRO)
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	24,660,000
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	146,688,000
Total Costs
Land	0
Buildings and Improvements	171,348,000
Accumulated Depreciation	(101,925,000)
Americas | NY8 NEW YORK (METRO)
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	12,188,000
Total Costs
Land	0
Buildings and Improvements	12,188,000
Accumulated Depreciation	(7,195,000)
Americas | NY9 NEW YORK (METRO)
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	54,514,000
Total Costs
Land	0
Buildings and Improvements	54,514,000
Accumulated Depreciation	(31,583,000)
Americas | NY11 NEW YORK (METRO)
Initial Costs to Company
Encumbrances	0
Land	2,050,000
Buildings and Improvements	58,717,000
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	3,086,000
Total Costs
Land	2,050,000
Buildings and Improvements	61,803,000
Accumulated Depreciation	(4,707,000)
Americas | NY12 NEW YORK (METRO)
Initial Costs to Company
Encumbrances	0
Land	3,460,000
Buildings and Improvements	10,380,000
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	1,571,000
Total Costs
Land	3,460,000
Buildings and Improvements	11,951,000
Accumulated Depreciation	(942,000)
Americas | NY13 NEW YORK (METRO)
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	31,603,000
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	1,527,000
Total Costs
Land	0
Buildings and Improvements	33,130,000
Accumulated Depreciation	(2,829,000)
Americas | PH1 PHILADELPHIA (METRO)
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	43,862,000
Total Costs
Land	0
Buildings and Improvements	43,862,000
Accumulated Depreciation	(12,765,000)
Americas | RJ1 RIO DE JANEIRO (METRO), BRAZIL
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	23,297,000
Total Costs
Land	0
Buildings and Improvements	23,297,000
Accumulated Depreciation	(16,898,000)
Americas | RJ2 RIO DE JANEIRO (METRO), BRAZIL
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	2,012,000
Costs Capitalized Subsequent to Acquisition or Lease
Land	1,986,000
Buildings and Improvements	53,635,000
Total Costs
Land	1,986,000
Buildings and Improvements	55,647,000
Accumulated Depreciation	(13,460,000)
Americas | SE2 SEATTLE (METRO)
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	30,282,000
Total Costs
Land	0
Buildings and Improvements	30,282,000
Accumulated Depreciation	(23,003,000)
Americas | SE3 SEATTLE (METRO)
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	1,760,000
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	95,706,000
Total Costs
Land	0
Buildings and Improvements	97,466,000
Accumulated Depreciation	(28,649,000)
Americas | SE4 SEATTLE (METRO)
Initial Costs to Company
Encumbrances	0
Land	4,000,000
Buildings and Improvements	12,903,000
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	(112,000)
Total Costs
Land	4,000,000
Buildings and Improvements	12,791,000
Accumulated Depreciation	(1,669,000)
Americas | SP1 SÃO PAULO (METRO), BRAZIL
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	10,188,000
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	24,862,000
Total Costs
Land	0
Buildings and Improvements	35,050,000
Accumulated Depreciation	(21,485,000)
Americas | SP2 SÃO PAULO (METRO), BRAZIL
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	85,948,000
Total Costs
Land	0
Buildings and Improvements	85,948,000
Accumulated Depreciation	(46,937,000)
Americas | SP3 SÃO PAULO (METRO), BRAZIL
Initial Costs to Company
Encumbrances	0
Land	12,148,000
Buildings and Improvements	72,997,000
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	8,208,000
Total Costs
Land	12,148,000
Buildings and Improvements	81,205,000
Accumulated Depreciation	(5,011,000)
Americas | SP4 SÃO PAULO (METRO), BRAZIL
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	24,633,000
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	1,572,000
Total Costs
Land	0
Buildings and Improvements	26,205,000
Accumulated Depreciation	(2,810,000)
Americas | SV1 SILICON VALLEY (METRO)
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition or Lease
Land	15,545,000
Buildings and Improvements	162,162,000
Total Costs
Land	15,545,000
Buildings and Improvements	162,162,000
Accumulated Depreciation	(108,646,000)
Americas | SV2 SILICON VALLEY (METRO)
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	150,653,000
Total Costs
Land	0
Buildings and Improvements	150,653,000
Accumulated Depreciation	(76,489,000)
Americas | SV3 SILICON VALLEY (METRO)
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	45,592,000
Total Costs
Land	0
Buildings and Improvements	45,592,000
Accumulated Depreciation	(40,301,000)
Americas | SV4 SILICON VALLEY (METRO)
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	27,184,000
Total Costs
Land	0
Buildings and Improvements	27,184,000
Accumulated Depreciation	(20,935,000)
Americas | SV5 SILICON VALLEY (METRO)
Initial Costs to Company
Encumbrances	0
Land	6,238,000
Buildings and Improvements	98,991,000
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	90,853,000
Total Costs
Land	6,238,000
Buildings and Improvements	189,844,000
Accumulated Depreciation	(53,708,000)
Americas | SV6 SILICON VALLEY (METRO)
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	15,585,000
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	22,785,000
Total Costs
Land	0
Buildings and Improvements	38,370,000
Accumulated Depreciation	(25,454,000)
Americas | SV8 SILICON VALLEY (METRO)
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	50,520,000
Total Costs
Land	0
Buildings and Improvements	50,520,000
Accumulated Depreciation	(26,134,000)
Americas | SV10 SILICON VALLEY (METRO)
Initial Costs to Company
Encumbrances	0
Land	12,646,000
Buildings and Improvements	123,594,000
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	6,939,000
Total Costs
Land	12,646,000
Buildings and Improvements	130,533,000
Accumulated Depreciation	(2,816,000)
Americas | SV12 SILICON VALLEY (METRO)
Initial Costs to Company
Encumbrances	0
Land	20,313,000
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	2,340,000
Total Costs
Land	20,313,000
Buildings and Improvements	2,340,000
Accumulated Depreciation	0
Americas | SV13 SILICON VALLEY (METRO)
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	3,828,000
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	52,000
Total Costs
Land	0
Buildings and Improvements	3,880,000
Accumulated Depreciation	(635,000)
Americas | SV14 SILICON VALLEY (METRO)
Initial Costs to Company
Encumbrances	0
Land	3,638,000
Buildings and Improvements	5,503,000
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	181,000
Total Costs
Land	3,638,000
Buildings and Improvements	5,684,000
Accumulated Depreciation	(361,000)
Americas | SV15 SILICON VALLEY (METRO)
Initial Costs to Company
Encumbrances	0
Land	7,651,000
Buildings and Improvements	23,060,000
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	72,000
Total Costs
Land	7,651,000
Buildings and Improvements	23,132,000
Accumulated Depreciation	(1,605,000)
Americas | SV16 SILICON VALLEY (METRO)
Initial Costs to Company
Encumbrances	0
Land	4,271,000
Buildings and Improvements	15,018,000
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	274,000
Total Costs
Land	4,271,000
Buildings and Improvements	15,292,000
Accumulated Depreciation	(1,201,000)
Americas | SV17 SILICON VALLEY (METRO)
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	17,493,000
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	526,000
Total Costs
Land	0
Buildings and Improvements	18,019,000
Accumulated Depreciation	(2,906,000)
Americas | TR1 TORONTO (METRO), CANADA
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	96,425,000
Total Costs
Land	0
Buildings and Improvements	96,425,000
Accumulated Depreciation	(25,161,000)
Americas | TR2 TORONTO (METRO), CANADA
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	21,113,000
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	101,996,000
Total Costs
Land	0
Buildings and Improvements	123,109,000
Accumulated Depreciation	(12,821,000)
Americas | OTHERS
Initial Costs to Company
Encumbrances	0
Land	70,803,000
Buildings and Improvements	19,365,000
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	8,408,000
Total Costs
Land	70,803,000
Buildings and Improvements	27,773,000
Accumulated Depreciation	(4,085,000)
EMEA | AD1 ABU DHABI (METRO), UNITED ARAB EMIRATES
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	387,000
Total Costs
Land	0
Buildings and Improvements	387,000
Accumulated Depreciation	(45,000)
EMEA | AM1 AMSTERDAM (METRO), THE NETHERLANDS
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	88,460,000
Total Costs
Land	0
Buildings and Improvements	88,460,000
Accumulated Depreciation	(33,378,000)
EMEA | AM2 AMSTERDAM (METRO), THE NETHERLANDS
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	75,488,000
Total Costs
Land	0
Buildings and Improvements	75,488,000
Accumulated Depreciation	(24,556,000)
EMEA | AM3 AMSTERDAM (METRO), THE NETHERLANDS
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	27,099,000
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	124,113,000
Total Costs
Land	0
Buildings and Improvements	151,212,000
Accumulated Depreciation	(36,011,000)
EMEA | AM4 AMSTERDAM (METRO), THE NETHERLANDS
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	119,113,000
Total Costs
Land	0
Buildings and Improvements	119,113,000
Accumulated Depreciation	(1,087,000)
EMEA | AM5 AMSTERDAM (METRO), THE NETHERLANDS
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	92,199,000
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	17,650,000
Total Costs
Land	0
Buildings and Improvements	109,849,000
Accumulated Depreciation	(13,629,000)
EMEA | AM6 AMSTERDAM (METRO), THE NETHERLANDS
Initial Costs to Company
Encumbrances	0
Land	6,616,000
Buildings and Improvements	50,876,000
Costs Capitalized Subsequent to Acquisition or Lease
Land	933,000
Buildings and Improvements	59,412,000
Total Costs
Land	7,549,000
Buildings and Improvements	110,288,000
Accumulated Depreciation	(6,985,000)
EMEA | AM7 AMSTERDAM (METRO), THE NETHERLANDS
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	7,397,000
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	8,528,000
Total Costs
Land	0
Buildings and Improvements	15,925,000
Accumulated Depreciation	(1,699,000)
EMEA | AM8 AMSTERDAM (METRO), THE NETHERLANDS
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	10,657,000
Total Costs
Land	0
Buildings and Improvements	10,657,000
Accumulated Depreciation	(2,670,000)
EMEA | BA1 BARCELONA (METRO), SPAIN
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	9,443,000
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	290,000
Total Costs
Land	0
Buildings and Improvements	9,733,000
Accumulated Depreciation	(256,000)
EMEA | DB1 DUBLIN (METRO), IRELAND
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	3,080,000
Total Costs
Land	0
Buildings and Improvements	3,080,000
Accumulated Depreciation	(731,000)
EMEA | DB2 DUBLIN (METRO), IRELAND
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	12,460,000
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	3,032,000
Total Costs
Land	0
Buildings and Improvements	15,492,000
Accumulated Depreciation	(3,543,000)
EMEA | DB3 DUBLIN (METRO), IRELAND
Initial Costs to Company
Encumbrances	0
Land	3,334,000
Buildings and Improvements	54,387,000
Costs Capitalized Subsequent to Acquisition or Lease
Land	470,000
Buildings and Improvements	18,163,000
Total Costs
Land	3,804,000
Buildings and Improvements	72,550,000
Accumulated Depreciation	(7,754,000)
EMEA | DB4 DUBLIN (METRO), IRELAND
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	26,875,000
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	17,297,000
Total Costs
Land	0
Buildings and Improvements	44,172,000
Accumulated Depreciation	(3,307,000)
EMEA | DU1 DÜSSELDORF (METRO), GERMANY
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition or Lease
Land	8,644,000
Buildings and Improvements	33,567,000
Total Costs
Land	8,644,000
Buildings and Improvements	33,567,000
Accumulated Depreciation	(21,137,000)
EMEA | DX1 DUBAI (METRO), UNITED ARAB EMIRATES
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	84,493,000
Total Costs
Land	0
Buildings and Improvements	84,493,000
Accumulated Depreciation	(8,695,000)
EMEA | DX2 DUBAI (METRO), UNITED ARAB EMIRATES
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	2,594,000
Total Costs
Land	0
Buildings and Improvements	2,594,000
Accumulated Depreciation	(11,000)
EMEA | EN1 ENSCHEDE (METRO), THE NETHERLANDS
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	29,382,000
Total Costs
Land	0
Buildings and Improvements	29,382,000
Accumulated Depreciation	(17,764,000)
EMEA | FR1 FRANKFURT (METRO), GERMANY
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	7,615,000
Total Costs
Land	0
Buildings and Improvements	7,615,000
Accumulated Depreciation	(7,371,000)
EMEA | FR2 FRANKFURT (METRO), GERMANY
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition or Lease
Land	13,132,000
Buildings and Improvements	335,573,000
Total Costs
Land	13,132,000
Buildings and Improvements	335,573,000
Accumulated Depreciation	(99,648,000)
EMEA | FR3 FRANKFURT (METRO), GERMANY
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	1,172,000
Total Costs
Land	0
Buildings and Improvements	1,172,000
Accumulated Depreciation	(1,157,000)
EMEA | FR4 FRANKFURT (METRO), GERMANY
Initial Costs to Company
Encumbrances	0
Land	11,578,000
Buildings and Improvements	9,307,000
Costs Capitalized Subsequent to Acquisition or Lease
Land	1,633,000
Buildings and Improvements	74,071,000
Total Costs
Land	13,211,000
Buildings and Improvements	83,378,000
Accumulated Depreciation	(21,689,000)
EMEA | FR5 FRANKFURT (METRO), GERMANY
Initial Costs to Company
Encumbrances	30,310,000
Land	0
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition or Lease
Land	4,240,000
Buildings and Improvements	148,382,000
Total Costs
Land	4,240,000
Buildings and Improvements	148,382,000
Accumulated Depreciation	(30,480,000)
EMEA | FR6 FRANKFURT (METRO), GERMANY
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	106,231,000
Total Costs
Land	0
Buildings and Improvements	106,231,000
Accumulated Depreciation	(2,336,000)
EMEA | FR7 FRANKFURT (METRO), GERMANY
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	43,634,000
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	12,865,000
Total Costs
Land	0
Buildings and Improvements	56,499,000
Accumulated Depreciation	(8,816,000)
EMEA | GV1 GENEVA (METRO), SWITZERLAND
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	7,493,000
Total Costs
Land	0
Buildings and Improvements	7,493,000
Accumulated Depreciation	(4,625,000)
EMEA | GV2 GENEVA (METRO), SWITZERLAND
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	23,250,000
Total Costs
Land	0
Buildings and Improvements	23,250,000
Accumulated Depreciation	(17,044,000)
EMEA | HE1 HELSINKI (METRO), FINLAND
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	3,626,000
Total Costs
Land	0
Buildings and Improvements	3,626,000
Accumulated Depreciation	(1,362,000)
EMEA | HE2 HELSINKI (METRO), FINLAND
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	1,638,000
Total Costs
Land	0
Buildings and Improvements	1,638,000
Accumulated Depreciation	(1,023,000)
EMEA | HE3 HELSINKI (METRO), FINLAND
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	11,758,000
Total Costs
Land	0
Buildings and Improvements	11,758,000
Accumulated Depreciation	(4,971,000)
EMEA | HE4 HELSINKI (METRO), FINLAND
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	29,092,000
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	8,007,000
Total Costs
Land	0
Buildings and Improvements	37,099,000
Accumulated Depreciation	(6,697,000)
EMEA | HE5 HELSINKI (METRO), FINLAND
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	7,564,000
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	1,233,000
Total Costs
Land	0
Buildings and Improvements	8,797,000
Accumulated Depreciation	(2,358,000)
EMEA | HE6 HELSINKI (METRO), FINLAND
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	17,204,000
Costs Capitalized Subsequent to Acquisition or Lease
Land	1,791,000
Buildings and Improvements	25,836,000
Total Costs
Land	1,791,000
Buildings and Improvements	43,040,000
Accumulated Depreciation	(2,717,000)
EMEA | IS1 ISTANBUL (METRO), TURKEY
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	8,166,000
Total Costs
Land	0
Buildings and Improvements	8,166,000
Accumulated Depreciation	(4,042,000)
EMEA | IS2 ISTANBUL (METRO), TURKEY
Initial Costs to Company
Encumbrances	0
Land	14,460,000
Buildings and Improvements	39,289,000
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	1,332,000
Total Costs
Land	14,460,000
Buildings and Improvements	40,621,000
Accumulated Depreciation	(298,000)
EMEA | LD3 LONDON (METRO), UNITED KINGDOM
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	16,526,000
Total Costs
Land	0
Buildings and Improvements	16,526,000
Accumulated Depreciation	(11,886,000)
EMEA | LD4 LONDON (METRO), UNITED KINGDOM
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	23,044,000
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	69,365,000
Total Costs
Land	0
Buildings and Improvements	92,409,000
Accumulated Depreciation	(39,185,000)
EMEA | LD5 LONDON (METRO), UNITED KINGDOM
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	16,412,000
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	183,250,000
Total Costs
Land	0
Buildings and Improvements	199,662,000
Accumulated Depreciation	(68,682,000)
EMEA | LD6 LONDON (METRO), UNITED KINGDOM
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	121,069,000
Total Costs
Land	0
Buildings and Improvements	121,069,000
Accumulated Depreciation	(12,525,000)
EMEA | LD8 LONDON (METRO), UNITED KINGDOM
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	107,544,000
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	18,577,000
Total Costs
Land	0
Buildings and Improvements	126,121,000
Accumulated Depreciation	(15,891,000)
EMEA | LD9 LONDON (METRO), UNITED KINGDOM
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	181,431,000
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	32,756,000
Total Costs
Land	0
Buildings and Improvements	214,187,000
Accumulated Depreciation	(26,163,000)
EMEA | LD10 LONDON (METRO), UNITED KINGDOM
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	40,251,000
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	63,905,000
Total Costs
Land	0
Buildings and Improvements	104,156,000
Accumulated Depreciation	(2,203,000)
EMEA | LS1 LISBON (METRO), PORTUGAL
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	7,374,000
Costs Capitalized Subsequent to Acquisition or Lease
Land	2,789,000
Buildings and Improvements	820,000
Total Costs
Land	2,789,000
Buildings and Improvements	8,194,000
Accumulated Depreciation	(193,000)
EMEA | MA1 MANCHESTER (METRO), UNITED KINGDOM
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	6,453,000
Total Costs
Land	0
Buildings and Improvements	6,453,000
Accumulated Depreciation	(1,765,000)
EMEA | MA2 MANCHESTER (METRO), UNITED KINGDOM
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	10,439,000
Total Costs
Land	0
Buildings and Improvements	10,439,000
Accumulated Depreciation	(2,586,000)
EMEA | MA3 MANCHESTER (METRO), UNITED KINGDOM
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	44,931,000
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	6,813,000
Total Costs
Land	0
Buildings and Improvements	51,744,000
Accumulated Depreciation	(9,862,000)
EMEA | MA4 MANCHESTER (METRO), UNITED KINGDOM
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	6,697,000
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	1,957,000
Total Costs
Land	0
Buildings and Improvements	8,654,000
Accumulated Depreciation	(3,245,000)
EMEA | MD1 MADRID (METRO), SPAIN
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	8,120,000
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	250,000
Total Costs
Land	0
Buildings and Improvements	8,370,000
Accumulated Depreciation	(165,000)
EMEA | MD2 MADRID (METRO), SPAIN
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	40,952,000
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	2,733,000
Total Costs
Land	0
Buildings and Improvements	43,685,000
Accumulated Depreciation	(1,083,000)
EMEA | ML1 MILAN (METRO), ITALY
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	134,000
Total Costs
Land	0
Buildings and Improvements	134,000
Accumulated Depreciation	(1,000)
EMEA | ML2 MILAN (METRO), ITALY
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	7,967,000
Total Costs
Land	0
Buildings and Improvements	7,967,000
Accumulated Depreciation	(5,026,000)
EMEA | ML3 MILAN (METRO), ITALY
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition or Lease
Land	3,344,000
Buildings and Improvements	33,566,000
Total Costs
Land	3,344,000
Buildings and Improvements	33,566,000
Accumulated Depreciation	(8,620,000)
EMEA | ML4 MLAN (METRO), ITALY
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	8,424,000
Total Costs
Land	0
Buildings and Improvements	8,424,000
Accumulated Depreciation	(2,667,000)
EMEA | MU1 MUNICH (METRO), GERMANY
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	19,124,000
Total Costs
Land	0
Buildings and Improvements	19,124,000
Accumulated Depreciation	(14,244,000)
EMEA | MU3 MUNICH (METRO), GERMANY
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	2,431,000
Total Costs
Land	0
Buildings and Improvements	2,431,000
Accumulated Depreciation	(1,088,000)
EMEA | PA1 PARIS (METRO), FRANCE
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	25,484,000
Total Costs
Land	0
Buildings and Improvements	25,484,000
Accumulated Depreciation	(19,996,000)
EMEA | PA2 & PA3 PARIS (METRO), FRANCE
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	29,615,000
Costs Capitalized Subsequent to Acquisition or Lease
Land	27,071,000
Buildings and Improvements	292,453,000
Total Costs
Land	27,071,000
Buildings and Improvements	322,068,000
Accumulated Depreciation	(101,473,000)
EMEA | PA4 PARIS (METRO), FRANCE
Initial Costs to Company
Encumbrances	0
Land	1,701,000
Buildings and Improvements	9,503,000
Costs Capitalized Subsequent to Acquisition or Lease
Land	239,000
Buildings and Improvements	228,289,000
Total Costs
Land	1,940,000
Buildings and Improvements	237,792,000
Accumulated Depreciation	(40,718,000)
EMEA | PA5 PARIS (METRO), FRANCE
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	16,554,000
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	3,072,000
Total Costs
Land	0
Buildings and Improvements	19,626,000
Accumulated Depreciation	(3,263,000)
EMEA | PA6 PARIS (METRO), FRANCE
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	66,000,000
Total Costs
Land	0
Buildings and Improvements	66,000,000
Accumulated Depreciation	(13,605,000)
EMEA | PA7 PARIS (METRO), FRANCE
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	16,137,000
Total Costs
Land	0
Buildings and Improvements	16,137,000
Accumulated Depreciation	(3,976,000)
EMEA | SA1 SEVILLE (METRO), SPAIN
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	1,594,000
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	49,000
Total Costs
Land	0
Buildings and Improvements	1,643,000
Accumulated Depreciation	(75,000)
EMEA | SK1 STOCKHOLM, (METRO), SWEDEN
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	15,495,000
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	6,758,000
Total Costs
Land	0
Buildings and Improvements	22,253,000
Accumulated Depreciation	(4,131,000)
EMEA | SK2 STOCKHOLM, (METRO), SWEDEN
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	80,148,000
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	14,171,000
Total Costs
Land	0
Buildings and Improvements	94,319,000
Accumulated Depreciation	(10,539,000)
EMEA | SK3 STOCKHOLM, (METRO), SWEDEN
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	15,255,000
Total Costs
Land	0
Buildings and Improvements	15,255,000
Accumulated Depreciation	(2,005,000)
EMEA | SO1 SOFIA (METRO), BULGARIA
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	5,236,000
Costs Capitalized Subsequent to Acquisition or Lease
Land	2,984,000
Buildings and Improvements	1,654,000
Total Costs
Land	2,984,000
Buildings and Improvements	6,890,000
Accumulated Depreciation	(860,000)
EMEA | WA1 WARSAW (METRO), POLAND
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	5,950,000
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	5,356,000
Total Costs
Land	0
Buildings and Improvements	11,306,000
Accumulated Depreciation	(2,402,000)
EMEA | WA2 WARSAW (METRO), POLAND
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	4,709,000
Costs Capitalized Subsequent to Acquisition or Lease
Land	3,038,000
Buildings and Improvements	8,278,000
Total Costs
Land	3,038,000
Buildings and Improvements	12,987,000
Accumulated Depreciation	(1,649,000)
EMEA | ZH1 ZURICH (METRO), SWITZERLAND
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	4,919,000
Total Costs
Land	0
Buildings and Improvements	4,919,000
Accumulated Depreciation	(4,376,000)
EMEA | ZH2 ZURICH (METRO), SWITZERLAND
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	5,025,000
Total Costs
Land	0
Buildings and Improvements	5,025,000
Accumulated Depreciation	(3,502,000)
EMEA | ZH4 ZURICH (METRO), SWITZERLAND
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	11,284,000
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	29,805,000
Total Costs
Land	0
Buildings and Improvements	41,089,000
Accumulated Depreciation	(21,868,000)
EMEA | ZH5 ZURICH (METRO), SWITZERLAND
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition or Lease
Land	7,987,000
Buildings and Improvements	59,474,000
Total Costs
Land	7,987,000
Buildings and Improvements	59,474,000
Accumulated Depreciation	(15,119,000)
EMEA | ZW1 ZWOLLE (METRO), THE NETHERLANDS
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	9,453,000
Total Costs
Land	0
Buildings and Improvements	9,453,000
Accumulated Depreciation	(5,416,000)
EMEA | OTHERS
Initial Costs to Company
Encumbrances	0
Land	3,184,000
Buildings and Improvements	1,293,000
Costs Capitalized Subsequent to Acquisition or Lease
Land	395,000
Buildings and Improvements	22,490,000
Total Costs
Land	3,579,000
Buildings and Improvements	23,783,000
Accumulated Depreciation	(914,000)
Asia-Pacific | HK1 HONG KONG (METRO), CHINA
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	148,027,000
Total Costs
Land	0
Buildings and Improvements	148,027,000
Accumulated Depreciation	(76,233,000)
Asia-Pacific | HK2 HONG KONG (METRO), CHINA
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	241,480,000
Total Costs
Land	0
Buildings and Improvements	241,480,000
Accumulated Depreciation	(74,971,000)
Asia-Pacific | HK3 HONG KONG (METRO), CHINA
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	133,673,000
Total Costs
Land	0
Buildings and Improvements	133,673,000
Accumulated Depreciation	(52,731,000)
Asia-Pacific | HK4 HONG KONG (METRO), CHINA
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	6,913,000
Total Costs
Land	0
Buildings and Improvements	6,913,000
Accumulated Depreciation	(4,882,000)
Asia-Pacific | HK5 HONG KONG (METRO), CHINA
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	70,002,000
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	31,781,000
Total Costs
Land	0
Buildings and Improvements	101,783,000
Accumulated Depreciation	(548,000)
Asia-Pacific | ME1 MELBOURNE (METRO), AUSTRALIA
Initial Costs to Company
Encumbrances	0
Land	15,341,000
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition or Lease
Land	1,269,000
Buildings and Improvements	73,238,000
Total Costs
Land	16,610,000
Buildings and Improvements	73,238,000
Accumulated Depreciation	(10,711,000)
Asia-Pacific | OS1 OSAKA (METRO), JAPAN
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	14,876,000
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	53,015,000
Total Costs
Land	0
Buildings and Improvements	67,891,000
Accumulated Depreciation	(12,946,000)
Asia-Pacific | SG1 SINGAPORE (METRO)
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	178,617,000
Total Costs
Land	0
Buildings and Improvements	178,617,000
Accumulated Depreciation	(116,756,000)
Asia-Pacific | SG2 SINGAPORE (METRO)
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	322,842,000
Total Costs
Land	0
Buildings and Improvements	322,842,000
Accumulated Depreciation	(135,587,000)
Asia-Pacific | SG3 SINGAPORE (METRO)
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	34,844,000
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	110,842,000
Total Costs
Land	0
Buildings and Improvements	145,686,000
Accumulated Depreciation	(20,324,000)
Asia-Pacific | SH2 SHANGHAI (METRO), CHINA
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	3,921,000
Total Costs
Land	0
Buildings and Improvements	3,921,000
Accumulated Depreciation	(1,369,000)
Asia-Pacific | SH3 SHANGHAI (METRO), CHINA
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	7,066,000
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	9,650,000
Total Costs
Land	0
Buildings and Improvements	16,716,000
Accumulated Depreciation	(4,595,000)
Asia-Pacific | SH4 SHANGHAI (METRO), CHINA
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	1,707,000
Total Costs
Land	0
Buildings and Improvements	1,707,000
Accumulated Depreciation	(1,875,000)
Asia-Pacific | SH5 SHANGHAI (METRO), CHINA
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	11,284,000
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	21,513,000
Total Costs
Land	0
Buildings and Improvements	32,797,000
Accumulated Depreciation	(8,463,000)
Asia-Pacific | SH6 SHANGHAI (METRO), CHINA
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	16,545,000
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	1,893,000
Total Costs
Land	0
Buildings and Improvements	18,438,000
Accumulated Depreciation	0
Asia-Pacific | SY1 SYDNEY (METRO), AUSTRALIA
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	26,684,000
Total Costs
Land	0
Buildings and Improvements	26,684,000
Accumulated Depreciation	(14,867,000)
Asia-Pacific | SY2 SYDNEY (METRO), AUSTRALIA
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	3,080,000
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	35,042,000
Total Costs
Land	0
Buildings and Improvements	38,122,000
Accumulated Depreciation	(21,647,000)
Asia-Pacific | SY3 SYDNEY (METRO), AUSTRALIA
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	8,712,000
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	148,640,000
Total Costs
Land	0
Buildings and Improvements	157,352,000
Accumulated Depreciation	(56,626,000)
Asia-Pacific | SY4 SYDNEY (METRO), AUSTRALIA
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	145,683,000
Total Costs
Land	0
Buildings and Improvements	145,683,000
Accumulated Depreciation	(9,490,000)
Asia-Pacific | TY1 TOKYO (METRO), JAPAN
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	19,426,000
Total Costs
Land	0
Buildings and Improvements	19,426,000
Accumulated Depreciation	(10,395,000)
Asia-Pacific | TY2 TOKYO (METRO), JAPAN
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	85,617,000
Total Costs
Land	0
Buildings and Improvements	85,617,000
Accumulated Depreciation	(60,135,000)
Asia-Pacific | TY3 TOKYO (METRO), JAPAN
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	73,526,000
Total Costs
Land	0
Buildings and Improvements	73,526,000
Accumulated Depreciation	(29,924,000)
Asia-Pacific | TY4 TOKYO (METRO), JAPAN
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	53,000,000
Total Costs
Land	0
Buildings and Improvements	53,000,000
Accumulated Depreciation	(15,975,000)
Asia-Pacific | TY5 TOKYO (METRO), JAPAN
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	102,000
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	52,606,000
Total Costs
Land	0
Buildings and Improvements	52,708,000
Accumulated Depreciation	(5,060,000)
Asia-Pacific | TY6 TOKYO (METRO), JAPAN
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	37,941,000
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	11,646,000
Total Costs
Land	0
Buildings and Improvements	49,587,000
Accumulated Depreciation	(12,113,000)
Asia-Pacific | TY7 TOKYO (METRO), JAPAN
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	13,175,000
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	4,669,000
Total Costs
Land	0
Buildings and Improvements	17,844,000
Accumulated Depreciation	(5,597,000)
Asia-Pacific | TY8 TOKYO (METRO), JAPAN
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	53,848,000
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	5,505,000
Total Costs
Land	0
Buildings and Improvements	59,353,000
Accumulated Depreciation	(10,006,000)
Asia-Pacific | TY9 TOKYO (METRO), JAPAN
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	106,710,000
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	6,877,000
Total Costs
Land	0
Buildings and Improvements	113,587,000
Accumulated Depreciation	(24,123,000)
Asia-Pacific | TY10 TOKYO (METRO), JAPAN
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	69,881,000
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	11,665,000
Total Costs
Land	0
Buildings and Improvements	81,546,000
Accumulated Depreciation	(10,751,000)
Asia-Pacific | OTHERS
Initial Costs to Company
Encumbrances	0
Land	0
Buildings and Improvements	0
Costs Capitalized Subsequent to Acquisition or Lease
Land	0
Buildings and Improvements	32,794,000
Total Costs
Land	0
Buildings and Improvements	32,794,000
Accumulated Depreciation	$ (15,986,000)

Schedule III Real Estate and125

Schedule III Real Estate and Accumulated Depreciation - Reconciliation of Carrying Amount of Real Estate Investments (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
SEC Schedule III, Reconciliation of Carrying Amount of Real Estate Investments [Roll Forward]
Balance, beginning of period	$ 9,855,811	$ 7,871,890	$ 7,006,695
Additions (acquisitions and improvements)	2,508,333	2,187,306	1,172,855
Disposals	(78,886)	(78,607)	(9,295)
Foreign currency transaction adjustments and others	662,477	(124,778)	(298,365)
Balance, end of year	$ 12,947,735	$ 9,855,811	$ 7,871,890

Schedule III Real Estate and126

Schedule III Real Estate and Accumulated Depreciation - Reconciliation of Real Estate Accumulated Depreciation (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
SEC Schedule III, Reconciliation of Real Estate Accumulated Depreciation [Roll Forward]
Balance, beginning of period	$ (3,175,972)	$ (2,595,648)	$ (2,242,345)
Additions (depreciation expense)	(748,942)	(618,970)	(440,002)
Disposals	65,922	9,401	7,396
Foreign currency transaction adjustments and others	(121,206)	29,245	79,303
Balance, end of year	$ (3,980,198)	$ (3,175,972)	$ (2,595,648)