Net Income Per Share - Summary of Net Income Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Aug. 31, 2017	Aug. 31, 2016	Aug. 31, 2017	Aug. 31, 2016
Basic net income per share:
Net income attributable to Class A shareholders	$ 7,473	$ 7,593	$ 11,720	$ 22,923
Basic weighted-average shares	28,081	20,015	28,077	20,011
Basic net income per share	$ 0.27	$ 0.38	$ 0.42	$ 1.15
Diluted net income per share:
Net income attributable to Class A shareholders	$ 7,473	$ 7,593	$ 11,720	$ 22,923
Add: Additional net income attributable to Class A shares due to increased percentage ownership in OpCo, net of tax, from the conversion of Class B shares	4,162	5,985	6,592	17,897
Total	$ 11,635	$ 13,578	$ 18,312	$ 40,820
Basic weighted-average shares	28,081	20,015	28,077	20,011
Effect of dilutive securities:
Class B shares	15,500	15,500	15,500	15,500
Diluted weighted-average shares	43,581	35,515	43,577	35,511
Diluted net income per share	$ 0.27	$ 0.38	$ 0.42	$ 1.15