Summary of Significant Accounting Policies Portfolio Energy Credits (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Accounting Policies [Abstract]
Portfolio Energy Credits, Gross	$ 3,649	$ 1,042
Portfolio Energy Credits, Accumulated Amortization	(3,508)	(1,042)
Portfolio Energy Credits, Net	$ 141	$ 0

Portfolio Energy Credits, Accumulated Amortization

No definition available.

Name:	swch_PortfolioEnergyCreditsAccumulatedAmortization
Namespace Prefix:	swch_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant