Annual report pursuant to Section 13 and 15(d)

Business segments - Schedule of Identifiable Assets (Details)

v3.10.0.1
Business segments - Schedule of Identifiable Assets (Details) - USD ($)
$ in Thousands
Sep. 30, 2018
Sep. 30, 2017
Segment Reporting Information [Line Items]    
Identifiable assets $ 1,462,000 $ 1,350,662
Operating segments | Health Services    
Segment Reporting Information [Line Items]    
Identifiable assets 482,490 515,850
Operating segments | U.S. Federal Services    
Segment Reporting Information [Line Items]    
Identifiable assets 375,807 397,824
Operating segments | Human Services    
Segment Reporting Information [Line Items]    
Identifiable assets 144,445 169,523
Corporate/Other    
Segment Reporting Information [Line Items]    
Identifiable assets $ 459,258 $ 267,465