Accounts Receivable - Net (Tables)

9 Months Ended

Jun. 30, 2019

Receivables [Abstract]

Schedule of net accounts receivable and billings in excess of costs on uncompleted contracts

Net accounts receivable consisted of the following:

	June 30, 2019			September 30, 2018
	(in thousands)
Billed	$	486,074		$	464,062
Unbilled	293,447			267,739
Total accounts receivable – gross	779,521			731,801
Allowance for doubtful accounts	(50,522		)	(37,580		)
Total accounts receivable – net	$	728,999		$	694,221