Net Income Per Share - Summary of Net Income Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								11 Months Ended	12 Months Ended
	Nov. 30, 2017	Aug. 31, 2017	May 31, 2017	Feb. 28, 2017	Nov. 30, 2016	Aug. 31, 2016	May 31, 2016	Feb. 29, 2016	Nov. 30, 2015	Nov. 30, 2017	Nov. 30, 2016
Basic net income per share:
Net income attributable to Class A shareholders	$ (313)	$ 7,473	$ 3,386	$ 861	$ 4,178	$ 7,593	$ 10,022	$ 5,308	$ 18,726	$ 11,407	$ 27,101
Basic weighted-average shares	28,085	28,081	28,077	28,073	25,680	20,015	20,011	20,007	20,002	28,079	21,420
Basic (in dollars per share)	$ (0.01)	$ 0.27	$ 0.12	$ 0.03	$ 0.16	$ 0.38	$ 0.50	$ 0.27	$ 0.94	$ 0.41	$ 1.27
Diluted net income per share:
Net income attributable to Class A shareholders	$ (313)	$ 7,473	$ 3,386	$ 861	$ 4,178	$ 7,593	$ 10,022	$ 5,308	$ 18,726	$ 11,407	$ 27,101
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									14,474	6,866	20,466
Total									$ 33,200	$ 18,273	$ 47,567
Basic weighted-average shares	28,085	28,081	28,077	28,073	25,680	20,015	20,011	20,007	20,002	28,079	21,420
Effect of dilutive securities:
Potentially dilutive securities include in the computation of diluted shares									15,032	15,500	15,500
Diluted weighted-average shares	43,585	43,581	43,577	43,573	41,180	35,515	35,511	35,507	35,034	43,579	36,920
Diluted (in dollars per share)	$ (0.01)	$ 0.27	$ 0.12	$ 0.03	$ 0.16	$ 0.38	$ 0.50	$ 0.27	$ 0.94	$ 0.41	$ 1.27