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Contingencies (Tables)
 9 Months Ended
Jun. 30, 2012
Commitments and Contingencies Disclosure [Abstract]  
Warranty reserves
Our warranty reserves are as follows (in thousands):
 
Three Months Ended
 
Nine Months Ended
 
June 30,
 
June 30,
 
2012
 
2011
 
2012
 
2011
Balance at beginning of period
$
16,133

 
$
18,699

 
$
17,916

 
$
25,821

Accruals for warranties issued
1,963

 
1,344

 
5,191

 
3,158

Changes in liability related to warranties existing in prior periods
(565
)
 
(504
)
 
(1,916
)
 
(3,187
)
Payments made
(1,497
)
 
(2,285
)
 
(5,157
)
 
(8,538
)
Balance at end of period
$
16,034

 
$
17,254

 
$
16,034

 
$
17,254