Assets Held for Sale (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenues	$ 30,401		$ 50,982
Disposal Group, Including Discontinued Operation, Unclassified Balance Sheet Disclosures [Abstract]
Total assets held for sale	1,024,666		1,024,666		$ 33,257
Total liabilities held for sale	(152,124)		(152,124)		(3,535)
Held-for-sale | London 2 data center in London, UK (LD2)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenues	2,950	$ 4,746	6,116	$ 9,429
Net income		$ 2,006	2,327	$ 3,880
Disposal Group, Including Discontinued Operation, Unclassified Balance Sheet Disclosures [Abstract]
Cash	25,111		25,111		0
Accounts receivable	15,470		15,470		2,222
Other current assets	78,013		78,013		408
Property, plant and equipment	238,742		238,742		23,533
Goodwill	461,558		461,558		5,000
Intangible assets	199,062		199,062		784
Other assets	6,710		6,710		1,310
Total assets held for sale	1,024,666		1,024,666		33,257
Accounts payable, accrued expenses and estimated costs to sell	(46,355)		(46,355)		(654)
Accrued property, plant and equipment	(13,151)		(13,151)		(816)
Current portion of capital lease and other financing obligation	(36,835)		(36,835)		0
Other current liabilities	(27,167)		(27,167)		(435)
Capital lease and other financing obligations, less current portion	(18,561)		(18,561)		0
Other liabilities	(10,055)		(10,055)		(1,630)
Total liabilities held for sale	$ (152,124)		$ (152,124)		$ (3,535)