Segment Information - Revenue Information on Services Basis (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Revenue from External Customer [Line Items]
Revenue	$ 1,215,877	$ 949,525
Recurring Revenues [Member]
Revenue from External Customer [Line Items]
Revenue	1,150,629	898,440
Recurring Revenues [Member] | Colocation [Member]
Revenue from External Customer [Line Items]
Revenue	881,384	691,522
Recurring Revenues [Member] | Interconnection [Member]
Revenue from External Customer [Line Items]
Revenue	194,999	148,060
Recurring Revenues [Member] | Managed infrastructure services [Member]
Revenue from External Customer [Line Items]
Revenue	71,401	54,609
Recurring Revenues [Member] | Other [Member]
Revenue from External Customer [Line Items]
Revenue	2,845	4,249
Non-recurring Revenues [Member]
Revenue from External Customer [Line Items]
Revenue	65,248	51,085
Americas [Member]
Revenue from External Customer [Line Items]
Revenue	602,627	436,447
Americas [Member] | Recurring Revenues [Member]
Revenue from External Customer [Line Items]
Revenue	575,992	416,103
Americas [Member] | Recurring Revenues [Member] | Colocation [Member]
Revenue from External Customer [Line Items]
Revenue	427,125	299,273
Americas [Member] | Recurring Revenues [Member] | Interconnection [Member]
Revenue from External Customer [Line Items]
Revenue	129,253	100,850
Americas [Member] | Recurring Revenues [Member] | Managed infrastructure services [Member]
Revenue from External Customer [Line Items]
Revenue	18,535	15,061
Americas [Member] | Recurring Revenues [Member] | Other [Member]
Revenue from External Customer [Line Items]
Revenue	1,079	919
Americas [Member] | Non-recurring Revenues [Member]
Revenue from External Customer [Line Items]
Revenue	26,635	20,344
EMEA [Member]
Revenue from External Customer [Line Items]
Revenue	379,630	314,847
EMEA [Member] | Recurring Revenues [Member]
Revenue from External Customer [Line Items]
Revenue	355,490	296,607
EMEA [Member] | Recurring Revenues [Member] | Colocation [Member]
Revenue from External Customer [Line Items]
Revenue	288,061	253,254
EMEA [Member] | Recurring Revenues [Member] | Interconnection [Member]
Revenue from External Customer [Line Items]
Revenue	34,977	22,351
EMEA [Member] | Recurring Revenues [Member] | Managed infrastructure services [Member]
Revenue from External Customer [Line Items]
Revenue	30,686	17,672
EMEA [Member] | Recurring Revenues [Member] | Other [Member]
Revenue from External Customer [Line Items]
Revenue	1,766	3,330
EMEA [Member] | Non-recurring Revenues [Member]
Revenue from External Customer [Line Items]
Revenue	24,140	18,240
Asia-Pacific [Member]
Revenue from External Customer [Line Items]
Revenue	233,620	198,231
Asia-Pacific [Member] | Recurring Revenues [Member]
Revenue from External Customer [Line Items]
Revenue	219,147	185,730
Asia-Pacific [Member] | Recurring Revenues [Member] | Colocation [Member]
Revenue from External Customer [Line Items]
Revenue	166,198	138,995
Asia-Pacific [Member] | Recurring Revenues [Member] | Interconnection [Member]
Revenue from External Customer [Line Items]
Revenue	30,769	24,859
Asia-Pacific [Member] | Recurring Revenues [Member] | Managed infrastructure services [Member]
Revenue from External Customer [Line Items]
Revenue	22,180	21,876
Asia-Pacific [Member] | Recurring Revenues [Member] | Other [Member]
Revenue from External Customer [Line Items]
Revenue	0	0
Asia-Pacific [Member] | Non-recurring Revenues [Member]
Revenue from External Customer [Line Items]
Revenue	$ 14,473	$ 12,501