XML 56 R39.htm IDEA: XBRL DOCUMENT v3.4.0.3
Accounts Receivable-Net (Details) - USD ($)
$ in Thousands
 6 Months Ended 12 Months Ended
Mar. 31, 2016
Sep. 30, 2015
Accounts Receivable-Net    
Billed $ 2,376,500 $ 2,426,200
Unbilled 2,062,100 2,099,800
Contract retentions 427,800 379,600
Total accounts receivable-gross 4,866,400 4,905,600
Allowance for doubtful accounts (65,200) (64,100)
Total accounts receivable-net $ 4,801,196 $ 4,841,450
Period in which unbilled receivables are expected to be billed and collected 12 months 12 months
Total receivables sold that remain outstanding $ 252,100 $ 240,800