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

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Acquisitions Acquisitions - Intangible Assets (Details) - USD ($) $ in Thousands	Apr. 18, 2018	Apr. 02, 2018
Customer relationships [Member] \| Metronode [Member]
Business Acquisition [Line Items]
Fair Value	$ 128,229
Estimated Useful Lives (Years)	20 years
Weighted-average Estimated Useful Lives (Years)	20 years
Customer relationships [Member] \| Infomart Dallas [Member]
Business Acquisition [Line Items]
Fair Value		$ 31,195
Estimated Useful Lives (Years)		20 years
Weighted-average Estimated Useful Lives (Years)		20 years
In-place leases [Member] \| Infomart Dallas [Member]
Business Acquisition [Line Items]
Fair Value		$ 19,959
Weighted-average Estimated Useful Lives (Years)		6 years 9 months 18 days
Trade names [Member] \| Infomart Dallas [Member]
Business Acquisition [Line Items]
Fair Value		$ 9,614
Estimated Useful Lives (Years)		20 years
Weighted-average Estimated Useful Lives (Years)		20 years
Favorable lease [Member] \| Infomart Dallas [Member]
Business Acquisition [Line Items]
Fair Value		$ 465
Weighted-average Estimated Useful Lives (Years)		7 years
Minimum [Member] \| In-place leases [Member] \| Infomart Dallas [Member]
Business Acquisition [Line Items]
Estimated Useful Lives (Years)		3 years 7 months 6 days
Minimum [Member] \| Favorable lease [Member] \| Infomart Dallas [Member]
Business Acquisition [Line Items]
Estimated Useful Lives (Years)		3 years 7 months 6 days
Maximum [Member] \| In-place leases [Member] \| Infomart Dallas [Member]
Business Acquisition [Line Items]
Estimated Useful Lives (Years)		7 years 6 months
Maximum [Member] \| Favorable lease [Member] \| Infomart Dallas [Member]
Business Acquisition [Line Items]
Estimated Useful Lives (Years)		7 years 6 months