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Contingencies (Tables)
 12 Months Ended
Sep. 30, 2012
Commitments and Contingencies Disclosure [Abstract]  
Warranty reserves
Our warranty reserves are as follows (in thousands):
 
Fiscal Year Ended September 30,
 
2012
 
2011
 
2010
Balance at beginning of period
$
17,916

 
$
25,821

 
$
30,100

Accruals for warranties issued
6,540

 
5,665

 
6,827

Changes in liability related to warranties existing in prior periods
(2,677
)
 
(2,790
)
 
3,308

Payments made
(6,302
)
 
(10,780
)
 
(14,414
)
Balance at end of period
$
15,477

 
$
17,916

 
$
25,821