Quarterly report pursuant to Section 13 or 15(d)

Revenue Recognition - Disaggregation of Revenue (Details)

v3.20.2
Revenue Recognition - Disaggregation of Revenue (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Disaggregation of Revenue [Line Items]        
Revenue $ 901,337 $ 730,710 $ 2,537,701 $ 2,131,849
United States of America        
Disaggregation of Revenue [Line Items]        
Revenue 787,092 583,428 2,168,033 1,675,101
United Kingdom        
Disaggregation of Revenue [Line Items]        
Revenue 53,364 72,265 190,088 224,017
Australia        
Disaggregation of Revenue [Line Items]        
Revenue 38,415 48,744 100,390 153,114
Rest of world        
Disaggregation of Revenue [Line Items]        
Revenue 22,466 26,273 79,190 79,617
Total U.S. state government agencies        
Disaggregation of Revenue [Line Items]        
Revenue 344,748 294,567 969,274 872,909
New York State government agencies        
Disaggregation of Revenue [Line Items]        
Revenue 79,140 90,295 276,585 271,865
Other U.S. state government agencies        
Disaggregation of Revenue [Line Items]        
Revenue 265,608 204,272 692,689 601,044
United States Federal Government agencies        
Disaggregation of Revenue [Line Items]        
Revenue 429,031 276,294 1,155,773 745,195
International government agencies        
Disaggregation of Revenue [Line Items]        
Revenue 107,353 136,848 345,629 425,921
Other, including local municipalities and commercial customers        
Disaggregation of Revenue [Line Items]        
Revenue 20,205 23,001 67,025 87,824
Performance-based        
Disaggregation of Revenue [Line Items]        
Revenue 295,650 260,052 864,077 834,531
Cost-plus        
Disaggregation of Revenue [Line Items]        
Revenue 422,641 282,795 1,184,425 756,227
Fixed price        
Disaggregation of Revenue [Line Items]        
Revenue 132,535 142,940 352,255 429,962
Time and materials        
Disaggregation of Revenue [Line Items]        
Revenue 50,511 44,923 136,944 111,129
U.S. Health & Human Services        
Disaggregation of Revenue [Line Items]        
Revenue 336,950 291,132 957,929 876,082
U.S. Federal Services        
Disaggregation of Revenue [Line Items]        
Revenue 450,143 292,295 1,210,105 799,018
Outside the U.S.        
Disaggregation of Revenue [Line Items]        
Revenue 114,244 147,283 369,667 456,749
Program administration | U.S. Health & Human Services        
Disaggregation of Revenue [Line Items]        
Revenue 251,616 212,638 724,960 651,343
Program administration | U.S. Federal Services        
Disaggregation of Revenue [Line Items]        
Revenue 362,973 204,622 949,071 554,739
Program administration | Outside the U.S.        
Disaggregation of Revenue [Line Items]        
Revenue 15,544 16,767 49,583 48,009
Technology solutions | U.S. Federal Services        
Disaggregation of Revenue [Line Items]        
Revenue 42,101 39,994 130,172 116,870
Assessments and appeals | U.S. Health & Human Services        
Disaggregation of Revenue [Line Items]        
Revenue 40,875 35,657 104,621 106,209
Assessments and appeals | U.S. Federal Services        
Disaggregation of Revenue [Line Items]        
Revenue 45,069 47,679 130,862 127,409
Assessments and appeals | Outside the U.S.        
Disaggregation of Revenue [Line Items]        
Revenue 42,468 62,152 167,397 192,233
Workforce and children services | U.S. Health & Human Services        
Disaggregation of Revenue [Line Items]        
Revenue 32,531 29,146 90,651 76,947
Workforce and children services | Outside the U.S.        
Disaggregation of Revenue [Line Items]        
Revenue 55,046 65,819 146,968 208,856
Other | U.S. Health & Human Services        
Disaggregation of Revenue [Line Items]        
Revenue 11,928 13,691 37,697 41,583
Other | Outside the U.S.        
Disaggregation of Revenue [Line Items]        
Revenue $ 1,186 $ 2,545 $ 5,719 $ 7,651