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Commitments and Contingencies (Tables)
 9 Months Ended
Aug. 31, 2012
Commitments and Contingencies Disclosure [Abstract]  
Changes in the Warranty Liability
The changes in the Company’s warranty liability were as follows (in thousands):
 
Nine Months Ended August 31,
 
Three Months Ended August 31,
 
2012
 
2011
 
2012
 
2011
Balance at beginning of period
$
67,693

 
$
93,988

 
$
50,866

 
$
82,630

Warranties issued
5,263

 
3,236

 
2,290

 
1,255

Payments
(14,609
)
 
(20,483
)
 
(5,906
)
 
(6,012
)
Adjustments (a)
(11,021
)
 
(6,242
)
 
76

 
(7,374
)
Balance at end of period
$
47,326

 
$
70,499

 
$
47,326

 
$
70,499

 
(a)
The Company’s warranty adjustments for the nine months ended August 31, 2012 include $11.2 million of adjustments that were recorded to reflect the Company’s assessment of trends in its overall warranty claims experience on homes previously delivered. The Company's warranty adjustments for the nine months and three months ended August 31, 2011 include $7.4 million of adjustments that also resulted from the Company's assessment of trends in its overall warranty claims experience on homes previously delivered.