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Lease Agreements and Power Purchase Agreements - Additional Information (Details)
12 Months Ended
Nov. 30, 2017
Lease
Operating Leased Assets [Line Items]  
Estimated residual value over the lease term (in years) 20 years
Lease term expiration date Dec. 31, 2019
Residential Portfolio  
Operating Leased Assets [Line Items]  
Number of operating lease agreements 5,800