Segment Information - Revenue Information on Services Basis (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Revenue from External Customer [Line Items]
Revenue	$ 844,156	$ 643,174
Recurring Revenues [Member]
Revenue from External Customer [Line Items]
Revenue	797,094	609,657
Recurring Revenues [Member] | Colocation [Member]
Revenue from External Customer [Line Items]
Revenue	619,893	481,545
Recurring Revenues [Member] | Interconnection [Member]
Revenue from External Customer [Line Items]
Revenue	127,205	101,658
Recurring Revenues [Member] | Managed infrastructure services [Member]
Revenue from External Customer [Line Items]
Revenue	44,736	23,855
Recurring Revenues [Member] | Rental [Member]
Revenue from External Customer [Line Items]
Revenue	5,260	2,599
Non-recurring Revenues [Member]
Revenue from External Customer [Line Items]
Revenue	$ 47,062	$ 33,517