Quarterly report pursuant to Section 13 or 15(d)

Revenue Recognition - Disaggregation of Revenue (Details)

v3.19.2
Revenue Recognition - Disaggregation of Revenue (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Disaggregation of Revenue [Line Items]        
Revenue $ 730,710 $ 597,855 $ 2,131,849 $ 1,833,790
United States of America        
Disaggregation of Revenue [Line Items]        
Revenue 583,428   1,675,101  
United Kingdom        
Disaggregation of Revenue [Line Items]        
Revenue 72,265   224,017  
Australia        
Disaggregation of Revenue [Line Items]        
Revenue 48,744   153,114  
Rest of world        
Disaggregation of Revenue [Line Items]        
Revenue 26,273   79,617  
Total U.S. state government agencies        
Disaggregation of Revenue [Line Items]        
Revenue 294,567   872,909  
New York State government agencies        
Disaggregation of Revenue [Line Items]        
Revenue 90,295   271,865  
Other U.S. state government agencies        
Disaggregation of Revenue [Line Items]        
Revenue 204,272   601,044  
United States Federal Government agencies        
Disaggregation of Revenue [Line Items]        
Revenue 276,294   745,195  
International government agencies        
Disaggregation of Revenue [Line Items]        
Revenue 136,848   425,921  
Other, including local municipalities and commercial customers        
Disaggregation of Revenue [Line Items]        
Revenue 23,001   87,824  
Performance-based        
Disaggregation of Revenue [Line Items]        
Revenue 260,052   834,531  
Cost-plus        
Disaggregation of Revenue [Line Items]        
Revenue 282,795   756,227  
Fixed price        
Disaggregation of Revenue [Line Items]        
Revenue 142,940   429,962  
Time and materials        
Disaggregation of Revenue [Line Items]        
Revenue 44,923   111,129  
U.S. Health & Human Services        
Disaggregation of Revenue [Line Items]        
Revenue 291,132   876,082  
U.S. Federal Services        
Disaggregation of Revenue [Line Items]        
Revenue 292,295   799,018  
Outside the United States        
Disaggregation of Revenue [Line Items]        
Revenue 147,283   456,749  
Program administration | U.S. Health & Human Services        
Disaggregation of Revenue [Line Items]        
Revenue 212,638   651,343  
Program administration | U.S. Federal Services        
Disaggregation of Revenue [Line Items]        
Revenue 204,622   554,739  
Program administration | Outside the United States        
Disaggregation of Revenue [Line Items]        
Revenue 16,767   48,009  
Assessments and appeals | U.S. Health & Human Services        
Disaggregation of Revenue [Line Items]        
Revenue 35,657   106,209  
Assessments and appeals | U.S. Federal Services        
Disaggregation of Revenue [Line Items]        
Revenue 47,679   127,409  
Assessments and appeals | Outside the United States        
Disaggregation of Revenue [Line Items]        
Revenue 62,152   192,233  
Workforce and children services | U.S. Health & Human Services        
Disaggregation of Revenue [Line Items]        
Revenue 29,146   76,947  
Workforce and children services | Outside the United States        
Disaggregation of Revenue [Line Items]        
Revenue 65,819   208,856  
Other | U.S. Health & Human Services        
Disaggregation of Revenue [Line Items]        
Revenue 13,691   41,583  
Other | Outside the United States        
Disaggregation of Revenue [Line Items]        
Revenue 2,545   7,651  
Technology solutions | U.S. Federal Services        
Disaggregation of Revenue [Line Items]        
Revenue $ 39,994   $ 116,870