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Revenue Recognition (Tables) | 3 Months Ended
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Dec. 31, 2021
Revenue from Contract with Customer [Abstract] |
Disaggregation of Revenue |
Table 4.1: Revenue by Contract Type |  |  |
| For the Three Months Ended
| December 31, 2021 |  | December 31, 2020
| (in thousands)
Performance-based | $ | 490,956 |  |  | $ | 293,960 |
Cost-plus | 340,081 |  |  | 384,483 |
Fixed price | 151,505 |  |  | 120,777 |
Time and materials | 168,334 |  |  | 146,334 |
Total revenue | $ | 1,150,876 |  |  | $ | 945,554 |
Table 4.2: Revenue by Customer Type
| For the Three Months Ended
| December 31, 2021 |  | December 31, 2020
| (in thousands)
U.S. state government agencies | $ | 371,547 |  |  | $ | 388,114 |
United States Federal Government agencies | 564,094 |  |  | 385,573 |
International government agencies | 171,375 |  |  | 147,342 |
Other, including local municipalities and commercial customers | 43,860 |  |  | 24,525 |
Total revenue | $ | 1,150,876 |  |  | $ | 945,554 |
Table 4.3: Revenue by Geography
| For the Three Months Ended
| December 31, 2021 |  | December 31, 2020
| (in thousands)
United States | $ | 968,288 |  |  | $ | 790,179 |
United Kingdom | 85,807 |  |  | 64,786 |
Australia | 52,814 |  |  | 55,932 |
Rest of world | 43,967 |  |  | 34,657 |
Total revenue | $ | 1,150,876 |  |  | $ | 945,554 |

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- Definition Tabular disclosure of disaggregation of revenue into categories depicting how nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factor. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130545-203045 + Details
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