Equity Method Investments (Details)	12 Months Ended
	Dec. 31, 2018 USD ($) investment	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)
Schedule of Equity Method Investments [Line Items]
Number of equity method investments | investment	2
Share of net loss from equity method investment	$ 331,000	$ 1,077,000	$ 5,764,000
Equity Method Investment, Summarized Financial Information, Discount On Notes Receivables			2,400,000
Equity Method Investment, Summarized Financial Information, Discount On Notes Receivables			600,000
SUPERNAP International
Schedule of Equity Method Investments [Line Items]
Ownership interest in equity method investment	50.00%
Equity Method Investment, Aggregate Cost	$ 1,300,000	1,300,000
Carrying value of equity method investment	0
Share of net loss from equity method investment	300,000	1,100,000	2,100,000
SUPERNAP International | Equity Method Investee
Schedule of Equity Method Investments [Line Items]
Reimbursable expenses due from equity method investment	$ 400,000	300,000
Planet3, Inc.
Schedule of Equity Method Investments [Line Items]
Ownership interest in equity method investment	45.00%
Equity Method Investment, Aggregate Cost	$ 10,000,000	10,000,000
Carrying value of equity method investment			4,400,000
Share of net loss from equity method investment			(3,700,000)
Equity Method Investment, Summarized Financial Information, Embedded Derivative			$ 900,000
Equity Method Investment, Other than Temporary Impairment		$ 7,700,000