Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Aug. 31, 2016	Nov. 30, 2015
Allowance for receivables	$ 1,000	$ 1,000
Property and Equipment, accumulated depreciation	$ 913,656	$ 839,039
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)	25,479,145	26,348,051
Common Stock, shares outstanding (in shares)	25,479,145	26,348,051
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)	19,770,282	19,942,136
Common Stock, shares outstanding (in shares)	19,770,282	19,942,136