Contract Balances and Performance Obligations Contract Balances and Performance Obligations (Tables)

12 Months Ended

Sep. 30, 2019

Revenue from Contract with Customer [Abstract]

Receivables

Receivables at September 30, 2019 and 2018 consisted of the following: 

	September 30,
	2019			2018
				As Adjusted
	(In thousands)
Billed	$	206,714		$	196,960
Unbilled	127,651			73,221
	334,365			270,181
Less: allowance for doubtful accounts	(2,568		)	(3,439		)
Net receivables (*)	$	331,797		$	266,742

(*) Included short-term receivables of $297.4 million and long-term receivables of $34.4 million that were recorded in accounts receivable, net and other assets, respectively, within the accompanying consolidated balance sheets at September 30, 2019. Long-term receivables were not material at September 30, 2018.

Accounts Receivable, Allowance for Credit Loss

Activity in the allowance for doubtful accounts was as follows: 

	Year Ended September 30,
	2019			2018
	(In thousands)
Balance, beginning of year	$	3,439		$	2,941
Add: expense	518			623
Less: write-offs (net of recoveries)	(1,389		)	(125		)
Balance, end of year	$	2,568		$	3,439

Contract with Customer, Asset and Liability

Significant changes in the deferred revenues balances are as follows:

	Year Ended September 30,
	2019			2018
				As Adjusted
	(In thousands)
Deferred revenues, beginning balance	$	108,118		$	114,729
Revenue recognized that was included in the deferred revenues balance at the beginning of the period	(93,265		)	(83,125		)
Increases due to billings, excluding amounts recognized as revenue during the period	101,467			76,514
Deferred revenues, ending balance (*)	$	116,320		$	108,118

Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction

The following table includes estimated revenue expected to be recognized in the future related to performance obligations that are unsatisfied (or partially unsatisfied) at the end of the reporting period:

Year Ending September 30,	Performance Obligations
	(In thousands)
2020	$	84,022
2021	66,809
2022	39,960
2023	26,188
2024	16,512
Thereafter	4,879
Total	$	238,370