Acquisitions - Preliminary Purchase Price Allocation (Detail) - USD ($) $ in Thousands	Jun. 30, 2016	Jan. 15, 2016	Dec. 31, 2015	Nov. 02, 2015
Business Acquisition [Line Items]
Assets held for sale	$ 1,024,666		$ 33,257
Goodwill	3,190,197		1,063,200
Liabilities held for sale	$ (152,124)		$ (3,535)
Telecity Group plc
Business Acquisition [Line Items]
Cash and cash equivalents		$ 73,368
Accounts receivable		24,042
Other current assets		34,583
Assets held for sale		892,169
Property, plant and equipment		1,055,667
Goodwill		2,264,789
Intangible assets		657,485
Deferred tax assets		1,198
Other assets		4,123
Total assets acquired		5,007,424
Accounts payable and accrued expenses		(90,589)
Accrued property, plant and equipment		(3,634)
Other current liabilities		(27,259)
Liabilities held for sale		(156,169)
Capital lease and other financing obligations		(199,809)
Mortgage and loans payable		(592,304)
Deferred tax liabilities		(159,701)
Other liabilities		(33,073)
Net assets acquired		$ 3,744,886
Bit-isle
Business Acquisition [Line Items]
Cash and cash equivalents				$ 33,198
Accounts receivable				7,359
Other current assets				51,038
Long-term investments				3,806
Property, plant and equipment				308,985
Goodwill				95,444
Intangible assets				111,374
Other assets				22,981
Total assets acquired				634,185
Accounts payable and accrued expenses				(15,028)
Accrued property, plant and equipment				(465)
Other current liabilities				(8,689)
Capital lease and other financing obligations				(108,833)
Mortgage and loans payable				(190,227)
Deferred tax liabilities				(32,192)
Other liabilities				(3,384)
Net assets acquired				$ 275,367