Leases (Details) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2019 USD ($)	Sep. 30, 2019 USD ($)
Lessee, Lease, Description [Line Items]
Operating lease cost	$ 37,659	$ 113,588
Short-term lease cost	3,535	10,928
Variable lease cost	10,670	27,424
Sublease income	(839)	(2,791)
Total operating lease costs	51,025	149,149
Operating leases for real estate facilities that have not yet commenced	$ 553,000	$ 553,000
operating leases for real estate facilities that have not yet commenced term		15 years
Real Estate Arrangements
Lessee, Lease, Description [Line Items]
Weighted average remaining lease term (in years)	10 years	10 years
Weighted average discount rate	4.10%	4.10%
Remainder of 2019	$ 10,975	$ 10,975
2020	49,206	49,206
2021	45,094	45,094
2022	41,090	41,090
2023	39,245	39,245
Thereafter	200,317	200,317
Total lease payments	385,927	385,927
Less: imputed interest	84,087	84,087
Total lease liabilities	301,840	301,840
Real Estate Arrangements | General and administrative
Lessee, Lease, Description [Line Items]
Operating lease cost	14,517	43,506
Short-term lease cost	26	231
Variable lease cost	3,617	10,655
Sublease income	(839)	(2,791)
Total operating lease costs	$ 17,321	$ 51,601
Co-location Arrangements
Lessee, Lease, Description [Line Items]
Weighted average remaining lease term (in years)	3 years 3 months 18 days	3 years 3 months 18 days
Weighted average discount rate	2.30%	2.30%
Remainder of 2019	$ 27,688	$ 27,688
2020	29,454	29,454
2021	9,789	9,789
2022	5,767	5,767
2023	3,944	3,944
Thereafter	10,158	10,158
Total lease payments	86,800	86,800
Less: imputed interest	4,931	4,931
Total lease liabilities	81,869	81,869
Co-location Arrangements | Cost of revenues
Lessee, Lease, Description [Line Items]
Operating lease cost	23,142	70,082
Short-term lease cost	3,509	10,697
Variable lease cost	7,053	16,769
Sublease income	0	0
Total operating lease costs	$ 33,704	$ 97,548