Quarterly Financial Information Quarterly Financial Information (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended									9 Months Ended	12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Oct. 10, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Quarterly Financial Information [Abstract]
Revenue	$ 103,214	$ 102,768	$ 102,161	$ 97,717	$ 99,328		$ 97,689	$ 92,101	$ 89,157		$ 405,860	$ 378,275	$ 318,352
Gross Profit	48,001	43,618	46,967	42,861	45,673		46,945	43,645	43,782		181,447	180,045	149,508
Net income (loss)	11,166	4,663	9,539	3,950	(60,347)	$ 8,733	16,486	14,953	20,328	$ (17,313)	29,318	(8,580)	31,368
Net income (loss) attributable to Switch, Inc.—basic and diluted	$ 2,554	$ 6	$ 821	$ 671	$ (66,975)		$ 16,486	$ 14,953	$ 20,328		$ 4,052	$ (15,208)	$ 31,368
Basic (in dollars per share)	$ 0.05	$ 0.00	$ 0.02	$ 0.02	$ (2.09)		$ 0.08	$ 0.07	$ 0.10		$ 0.09	$ (1.88)	$ 0.16
Diluted (in dollars per share)	$ 0.05	$ 0.00	$ 0.02	$ 0.02	$ (2.09)		$ 0.08	$ 0.07	$ 0.10		$ 0.09	$ (1.88)	$ 0.15