Investment in Unconsolidated Affiliates - Summary of Financial Information (Details) - SG2 Holdings, North Star Holdings, Lost Hills Blackwell Holdings, Henrietta Holdings and Stateline Holdings - USD ($) $ in Thousands	3 Months Ended
	Feb. 28, 2017	Feb. 29, 2016
Summary statements of operations information:
Revenue	$ 19,616	$ 8,650
Operating expenses	26,393	10,924
Net loss	$ (7,759)	$ (2,170)