Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	May 31, 2019	Nov. 30, 2018
Allowance for receivables	$ 1,000	$ 1,000
Property and Equipment, accumulated depreciation	$ 1,186,715	$ 1,129,378
Class A Common Stock $.01 Par Value
Common Stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common Stock, shares authorized (in shares)	80,000,000	80,000,000
Common Stock, shares issued (in shares)	23,498,775	23,408,516
Common Stock, shares outstanding (in shares)	23,498,775	23,408,516
Class B Common Stock $.01 Par Value
Common Stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common Stock, shares authorized (in shares)	40,000,000	40,000,000
Common Stock, shares issued (in shares)	19,619,928	19,644,581
Common Stock, shares outstanding (in shares)	19,619,928	19,644,581