Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2018

Accounting Policies [Abstract]

Schedule of Goodwill

The following is a summary of goodwill activity for the year ended December 31, 2018 (in thousands):

	Balance as of December 31, 2017		Merger / Acquisition		Impact of Change in Foreign Exchange Rates			Balance as of December 31, 2018
Merger / Portfolio Acquisition
Telx Acquisition	$	330,845	$	—	$	—		$	330,845
European Portfolio Acquisition	466,604		—		(24,255		)	442,349
DFT Merger	2,592,146		—		—			2,592,146
Ascenty Acquisition	—		982,667		—			982,667
Total	$	3,389,595	$	982,667	$	(24,255	)	$	4,348,007

Property, Plant and Equipment

Depreciation and amortization are recorded on a straight-line basis over the estimated useful lives as follows:

Acquired ground leases	Terms of the related lease
Buildings and improvements	5-39 years
Machinery and equipment	7-15 years
Furniture and fixtures	3-5 years
Leasehold improvements	Shorter of the estimated useful lives or the terms of the related leases
Tenant improvements	Shorter of the estimated useful lives or the terms of the related leases