Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Feb. 28, 2015	Nov. 30, 2014
Allowance for receivables	$ 1,000	$ 1,000
Property and Equipment, accumulated depreciation	$ 841,406	$ 818,084
Class A Common Stock $.01 Par Value
Common Stock, par value	$ 0.01	$ 0.01
Common Stock, shares authorized	80,000,000	80,000,000
Common Stock, shares issued	26,248,787	26,248,081
Common Stock, shares outstanding	26,248,787	26,248,081
Class B Common Stock $.01 Par Value
Common Stock, par value	$ 0.01	$ 0.01
Common Stock, shares authorized	40,000,000	40,000,000
Common Stock, shares issued	19,966,496	19,967,202
Common Stock, shares outstanding	19,966,496	19,967,202