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Note 22 (Detail) - Assets Measured at Fair Value on a Nonrecurring Basis (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 6 Months Ended
Apr. 30, 2013
Apr. 30, 2012
Apr. 30, 2013
Apr. 30, 2012
Pre-Impairment Amount $ 2,300 [1] $ 4,700 [1] $ 5,700 [1] $ 23,400 [1]
Total Losses (900) (2,100) (1,500) [2] (5,200)
Sold and Unsold Homes and Lots Under Development [Member] | Fair Value, Inputs, Level 3 [Member]
        
Fair Value 1,438 2,539 3,765 4,263
Sold and Unsold Homes and Lots Under Development [Member]
        
Pre-Impairment Amount 2,348 4,550 5,243 6,978
Total Losses (910) (2,011) (1,478) (2,715)
Land and Land Options Held for Future Development or Sale [Member] | Fair Value, Inputs, Level 3 [Member]
        
Fair Value 0 89 466 13,968
Land and Land Options Held for Future Development or Sale [Member]
        
Pre-Impairment Amount 0 180 485 16,496
Total Losses $ 0 $ (91) $ (19) $ (2,528)
[1] Represents carrying value, net of prior period impairments, if any, at the time of recording the applicable period's impairments.
[2] During the six months ended April 30, 2013, the Mid-Atlantic had an impairment totaling $2 thousand and the Southeast had an impairment totaling $17 thousand.