Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	May 31, 2018	Nov. 30, 2017
Allowance for receivables	$ 1,000	$ 1,000
Property and Equipment, accumulated depreciation	$ 1,080,165	$ 1,030,410
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)	24,069,929	24,113,778
Common Stock, shares outstanding (in shares)	24,069,929	24,113,778
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)	19,674,012	19,707,104
Common Stock, shares outstanding (in shares)	19,674,012	19,707,104