XML 51 R40.htm IDEA: XBRL DOCUMENT v3.7.0.1
Accounts Receivable - Net (Details) - USD ($)
$ in Thousands
 9 Months Ended 12 Months Ended
Jun. 30, 2017
Sep. 30, 2016
Billed $ 2,236,500 $ 2,267,600
Unbilled 2,068,100 1,890,200
Contract retentions 514,100 434,100
Total accounts receivable-gross 4,818,700 4,591,900
Allowance for doubtful accounts (59,400) (60,400)
Total accounts receivable-net $ 4,759,306 $ 4,531,460
Period in which unbilled receivables are expected to be billed and collected 12 months 12 months
Total receivables sold that remain outstanding $ 316,200 $ 356,300
Outstanding Receivables    
Number of Customers 0 0
Percentage of the Company's outstanding receivables, as a percent 10.00% 10.00%