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Contingencies (Tables)
 12 Months Ended
Sep. 30, 2014
Commitments and Contingencies Disclosure [Abstract]  
Warranty reserves
Our warranty reserves are as follows (in thousands):
 
Fiscal Year Ended September 30,
 
2014
 
2013
 
2012
Balance at beginning of period
$
11,663

 
$
15,477

 
$
17,916

Accruals for warranties issued
6,087

 
5,897

 
6,540

Changes in liability related to warranties existing in prior periods
9,836

 
(2,856
)
 
(2,677
)
Payments made
(11,502
)
 
(6,855
)
 
(6,302
)
Balance at end of period
$
16,084

 
$
11,663

 
$
15,477