Acquisitions (Narrative) (Details) $ in Thousands			6 Months Ended
	Jun. 06, 2016 USD ($) ft² a MW	Jun. 16, 2015 USD ($) property customer	Jun. 30, 2016 USD ($)	Jun. 30, 2015 USD ($)
Business Acquisition [Line Items]
Amoritization of intangible assets in the remainder of the year			$ 12,200
Amoritization of intangible assets in 2017			12,200
Amoritization of intangible assets in 2018			10,100
Amoritization of intangible assets in 2019			8,000
Amoritization of intangible assets in 2020			8,000
Cash consideration paid for acquisition			$ 149,303	$ 170,150
Piscataway Facility [Member]
Business Acquisition [Line Items]
Date of acquisition			Jun. 06, 2016
Acquisition costs	$ 125,600
Acres of real estate property | a	38
Area of facility (in square feet) | ft²	360,000
Piscataway Facility [Member] | Raised Floor With 18 MW of Critical Power [Member]
Business Acquisition [Line Items]
Area of facility (in square feet) | ft²	89,000
Capacity of the plant (in MW) | MW	18
Piscataway Facility [Member] | Additional Raised Floor With 8 MW of Additional Critical Power [Member]
Business Acquisition [Line Items]
Area of facility (in square feet) | ft²	87,000
Capacity of the plant (in MW) | MW	8
Carpathia Hosting, Inc. [Member]
Business Acquisition [Line Items]
Acquisition costs		$ 373,600
Number of customers of acquired entity | customer		230
Number of domestic data centers acquired | property		8
Number of international data centers acquired | property		5
Tax basis of deductible amount of goodwill acquired		$ 16,600
Carpathia Hosting, Inc. [Member] | Carpathia Hosting, Inc. [Member]
Business Acquisition [Line Items]
Ownership interest		100.00%