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Deferred Revenue and Financing Receivables (Tables)
 6 Months Ended
Mar. 30, 2013
Deferred Revenue And Financing Receivables [Abstract]  
Credit Risk Assessment for Financing Receivables
Our credit risk assessment for financing receivables was as follows:

 
March 30,
2013
 
September 30,
2012
 
(in thousands)
S&P bond rating BBB-1 and above-Tier 1
$
37,043

 
$
34,017

Internal Credit Assessment-Tier 2
3,697

 
8,446

Internal Credit Assessment-Tier 3
—

 
—

Total financing receivables
$
40,740

 
$
42,463