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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (a)(3)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275

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+ References

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- Definition

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+ References

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- Definition

Amount of increase in assets, excluding financial assets, lacking physical substance with a definite life, from an acquisition.

+ References

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Acquisitions - Acquired Identifiable Intangible Assets (Detail) - USD ($) $ in Thousands	Aug. 01, 2016	Jan. 15, 2016
Digital Realty [Member] \| In-place leases [Member]
Business Acquisition [Line Items]
Fair value of intangible assets acquired	$ 7,485
Weighted-average estimated useful lives (years)	4 years 3 months 18 days
Digital Realty [Member] \| In-place leases [Member] \| Minimum [Member]
Business Acquisition [Line Items]
Acquired intangible assets, Estimated useful lives (years)	10 months 24 days
Digital Realty [Member] \| In-place leases [Member] \| Maximum [Member]
Business Acquisition [Line Items]
Acquired intangible assets, Estimated useful lives (years)	9 years 4 months 24 days
Digital Realty [Member] \| Favorable leasehold interests [Member]
Business Acquisition [Line Items]
Fair value of intangible assets acquired	$ 4,273
Weighted-average estimated useful lives (years)	5 years 3 months 18 days
Digital Realty [Member] \| Favorable leasehold interests [Member] \| Minimum [Member]
Business Acquisition [Line Items]
Acquired intangible assets, Estimated useful lives (years)	1 year 10 months 24 days
Digital Realty [Member] \| Favorable leasehold interests [Member] \| Maximum [Member]
Business Acquisition [Line Items]
Acquired intangible assets, Estimated useful lives (years)	6 years 8 months 12 days
Telecity Group plc [Member] \| Favorable leasehold interests [Member]
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 [Member] \| Favorable leasehold interests [Member] \| Minimum [Member]
Business Acquisition [Line Items]
Acquired intangible assets, Estimated useful lives (years)		2 years
Telecity Group plc [Member] \| Favorable leasehold interests [Member] \| Maximum [Member]
Business Acquisition [Line Items]
Acquired intangible assets, Estimated useful lives (years)		25 years 4 months 24 days
Telecity Group plc [Member] \| Customer relationships [Member]
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 [Member] \| Trade names [Member]
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