Segment Information - Revenue Information on Services Basis (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Revenue from External Customer [Line Items]
Revenue	$ 900,510	$ 665,582	$ 1,744,666	$ 1,308,756
Recurring revenues
Revenue from External Customer [Line Items]
Revenue	851,771	626,691	1,648,865	1,236,348
Recurring revenues | Colocation
Revenue from External Customer [Line Items]
Revenue	662,669	496,610	1,282,562	978,155
Recurring revenues | Interconnection
Revenue from External Customer [Line Items]
Revenue	135,721	104,661	262,926	206,319
Recurring revenues | Managed infrastructure
Revenue from External Customer [Line Items]
Revenue	45,243	23,466	89,979	47,321
Recurring revenues | Other
Revenue from External Customer [Line Items]
Revenue	8,138	1,954	13,398	4,553
Non-recurring revenues
Revenue from External Customer [Line Items]
Revenue	$ 48,739	$ 38,891	$ 95,801	$ 72,408