Allowance for Doubtful Accounts (Tables)

12 Months Ended

Sep. 30, 2015

Allowance for Doubtful Accounts.

Schedule of change in the allowance for doubtful accounts

	Year Ended September 30,
	2015			2014			2013
Balance at beginning of period	$	1,752		$	2,556		$	2,583
Bad debt expense		2,282			1,175			1,671
Uncollected accounts written off, net of recoveries		(2,872	)		(1,979	)		(1,698	)
Balance at end of period	$	1,162		$	1,752		$	2,556