Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2017

Accounting Policies [Abstract]

Schedule of Goodwill

The following is a summary of goodwill activity for the year ended December 31, 2017 (in thousands):

	Balance as of December 31, 2016		Merger / Acquisition		Goodwill Adjustments			Impact of Change in Foreign Exchange Rates		Balance as of December 31, 2017
Merger / Portfolio Acquisition
Telx Acquisition	$	330,845	$	—	$	—		$	—	$	330,845
European Portfolio Acquisition	422,125		—		(2,620		)	47,099		466,604
DFT Merger	—		2,592,181		(35		)	—		2,592,146
Total	$	752,970	$	2,592,181	$	(2,655	)	$	47,099	$	3,389,595

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