Accounts Receivable - Net (Tables)

6 Months Ended

Mar. 31, 2019

Receivables [Abstract]

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

Net accounts receivable consisted of the following:

	March 31, 2019			September 30, 2018
	(in thousands)
Billed	$	439,480		$	464,062
Unbilled	234,577			267,739
Total accounts receivable – gross	674,057			731,801
Allowance for doubtful accounts	(44,460		)	(37,580		)
Total accounts receivable – net	$	629,597		$	694,221