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Subsequent Events (Details) - Subsequent Event
$ / shares in Units, $ in Millions
1 Months Ended
Apr. 30, 2018
$ / shares
Jan. 31, 2018
MWh
Feb. 01, 2018
USD ($)
Subsequent Event [Line Items]      
Minimum quantity required under purchase commitment (mwh) | MWh   10  
Purchase obligation term   23 months  
Purchase commitment | $     $ 4.9
Dividends declared (in dollars per share) $ 0.0147    
Switch, Ltd.      
Subsequent Event [Line Items]      
Cash distributions declared (in dollars per share) $ 0.0147