Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	May 31, 2019	May 31, 2018	May 31, 2019	May 31, 2018
Statement of Comprehensive Income [Abstract]
Net income	$ 15,073	$ 16,670	$ 36,628	$ 186,016
Other comprehensive income:
Amortization of terminated interest rate swap, net of tax benefit	205	200	409	389
Comprehensive income	$ 15,278	$ 16,870	$ 37,037	$ 186,405