Investment in Unconsolidated Affiliates - Summary of Financial Information (Details) - Solar Gen Two Holdings North Star Holdings Lost Hills Blackwell Holdings Henrietta Holdings And Stateline Holdings - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Aug. 31, 2017	Aug. 31, 2016	Aug. 31, 2017	Aug. 31, 2016
Summary statements of operations information:
Revenue	$ 74,549	$ 24,433	$ 136,442	$ 52,140
Operating expenses	26,939	11,201	78,851	34,483
Net loss	$ 47,627	$ 13,346	$ 53,298	$ 17,964