Investment in Unconsolidated Affiliates - Summary of Financial Information (Details) - Solar Gen Two Project Entity and North Star, Significant Investees - USD ($) $ in Thousands	3 Months Ended	8 Months Ended
	Aug. 31, 2015	Aug. 31, 2015
Summary statement of operations information:
Revenue	$ 20,814	$ 36,986
Operating expenses	10,437	23,225
Net income	$ 10,440	$ 13,754