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Allowance for Doubtful Accounts (Tables)
 12 Months Ended
Sep. 30, 2014
Allowance for Doubtful Accounts.  
Schedule of change in the allowance for doubtful accounts

The change in the allowance for doubtful accounts was as follows (in thousands):

                                                                                                                                                                                    

 

 

Year Ended September 30,

 

 

 

2014

 

2013

 

2012

 

Balance at beginning of period

 

$
2,556

 

$
2,583

 

$
2,086

 

Bad debt expense

 

 
1,175

 

 
1,671

 

 
1,764

 

Uncollected accounts written off, net of recoveries

 

 
(1,979

)

 
(1,698

)

 
(1,336

)

Allowance for doubtful accounts of acquired companies

 

 

—

 

 

—

 

 
69

 

 

 

 

 

 

 

 

 

Balance at end of period

 

$
1,752

 

$
2,556

 

$
2,583