Goodwill and Intangible Assets - Intangible Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Amortizable intangible assets:
Gross	$ 543,442	$ 41,382
Accumulated Amortization	(87,258)	(14,119)
Net	456,184	27,263
Intangible assets, gross	548,107	41,677
Total	460,849	27,558
Telecommunication licenses
Amortizable intangible assets:
Non-amortizable intangible assets:	4,370
Domain names
Amortizable intangible assets:
Non-amortizable intangible assets:	32	32
Trademarks
Amortizable intangible assets:
Non-amortizable intangible assets:	263	263
Developed technology
Amortizable intangible assets:
Gross	333,980	28,209
Accumulated Amortization	(55,390)	(10,497)
Net	278,590	17,712
Customer relationships
Amortizable intangible assets:
Gross	182,339	8,153
Accumulated Amortization	(26,347)	(2,411)
Net	155,992	5,742
Supplier relationships
Amortizable intangible assets:
Gross	4,356	2,696
Accumulated Amortization	(1,532)	(973)
Net	2,824	1,723
Trade names
Amortizable intangible assets:
Gross	20,060	60
Accumulated Amortization	(3,727)	(60)
Net	16,333	0
Patent
Amortizable intangible assets:
Gross	2,707	2,264
Accumulated Amortization	(262)	(178)
Net	$ 2,445	$ 2,086