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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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Acquisitions - Acquired Identifiable Intangible Assets (Detail) - USD ($) $ in Thousands	Aug. 01, 2016	Jan. 15, 2016	Nov. 02, 2015
Telecity Group plc \| Customer relationships
Business Acquisition [Line Items]
Fair value of intangible assets acquired		$ 591,956
Estimated useful lives		13 years 6 months
Weighted-average estimated useful lives		13 years 6 months
Telecity Group plc \| Trade names
Business Acquisition [Line Items]
Fair value of intangible assets acquired		$ 72,033
Estimated useful lives		1 year 6 months
Weighted-average estimated useful lives		1 year 6 months
Telecity Group plc \| Favorable leasehold interests
Business Acquisition [Line Items]
Fair value of intangible assets acquired		$ 40,025
Weighted-average estimated useful lives		19 years 2 months 12 days
Telecity Group plc \| Favorable leasehold interests \| Minimum
Business Acquisition [Line Items]
Estimated useful lives		2 years
Telecity Group plc \| Favorable leasehold interests \| Maximum
Business Acquisition [Line Items]
Estimated useful lives		25 years 5 months
Digital Realty \| In-place leases
Business Acquisition [Line Items]
Fair value of intangible assets acquired	$ 7,485
Weighted-average estimated useful lives	4 years 3 months 18 days
Digital Realty \| In-place leases \| Minimum
Business Acquisition [Line Items]
Estimated useful lives	10 months 24 days
Digital Realty \| In-place leases \| Maximum
Business Acquisition [Line Items]
Estimated useful lives	9 years 4 months 24 days
Digital Realty \| Favorable leasehold interests
Business Acquisition [Line Items]
Fair value of intangible assets acquired	$ 4,273
Weighted-average estimated useful lives	5 years 3 months 18 days
Digital Realty \| Favorable leasehold interests \| Minimum
Business Acquisition [Line Items]
Estimated useful lives	1 year 10 months 24 days
Digital Realty \| Favorable leasehold interests \| Maximum
Business Acquisition [Line Items]
Estimated useful lives	6 years 8 months 12 days
Bit-isle \| Customer relationships
Business Acquisition [Line Items]
Fair value of intangible assets acquired			$ 105,434
Estimated useful lives			13 years
Weighted-average estimated useful lives			13 years
Bit-isle \| Trade names
Business Acquisition [Line Items]
Fair value of intangible assets acquired			$ 3,455
Estimated useful lives			2 years
Weighted-average estimated useful lives			2 years
Bit-isle \| Favorable solar contracts
Business Acquisition [Line Items]
Fair value of intangible assets acquired			$ 2,410
Estimated useful lives			18 years
Weighted-average estimated useful lives			18 years
Bit-isle \| Other intangible assets
Business Acquisition [Line Items]
Fair value of intangible assets acquired			$ 75
Estimated useful lives			3 months
Weighted-average estimated useful lives			3 months