Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Feb. 28, 2017	Nov. 30, 2016
Allowance for receivables	$ 1,000	$ 1,000
Property and Equipment, accumulated depreciation	$ 959,912	$ 934,156
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)	24,856,172	24,922,561
Common Stock, shares outstanding (in shares)	24,856,172	24,922,561
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)	19,752,769	19,767,280
Common Stock, shares outstanding (in shares)	19,752,769	19,767,280