| Schedule of Financial Information for each of the Company's Business Segments | 
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| Table 3: Results of Operation by Business Segment |  
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For the Three Months Ended | 
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For the Six Months Ended | 
 
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March 31, 2022 | 
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March 31, 2021 | 
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March 31, 2022 | 
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March 31, 2021 | 
 
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Amount | 
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% (1) | 
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Amount | 
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% (1) | 
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Amount | 
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% (1) | 
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Amount | 
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% (1) | 
 
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(dollars in thousands) | 
 
| Revenue: | 
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| U.S. Services | 
$ | 
398,077  | 
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$ | 
448,215  | 
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$ | 
784,494  | 
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$ | 
833,149  | 
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| U.S. Federal Services | 
573,288  | 
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330,136  | 
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1,155,159  | 
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735,381  | 
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| Outside the U.S. | 
205,961  | 
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180,929  | 
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388,549  | 
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336,304  | 
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| Revenue | 
$ | 
1,177,326  | 
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$ | 
959,280  | 
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$ | 
2,328,202  | 
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$ | 
1,904,834  | 
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| Gross profit: | 
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| U.S. Services | 
$ | 
84,971  | 
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21.3 % | 
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$ | 
119,440  | 
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26.6 % | 
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$ | 
174,670  | 
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22.3 % | 
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$ | 
218,442  | 
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26.2 % | 
 
| U.S. Federal Services | 
115,153  | 
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20.1 % | 
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74,133  | 
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22.5 % | 
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241,729  | 
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20.9 % | 
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156,629  | 
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21.3 % | 
 
| Outside the U.S. | 
28,327  | 
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13.8 % | 
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37,085  | 
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20.5 % | 
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40,207  | 
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10.3 % | 
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61,642  | 
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18.3 % | 
 
| Gross profit | 
$ | 
228,451  | 
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19.4 % | 
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$ | 
230,658  | 
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24.0 % | 
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$ | 
456,606  | 
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19.6 % | 
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$ | 
436,713  | 
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22.9 % | 
 
| Selling, general, and administrative expenses: | 
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| U.S. Services | 
$ | 
38,273  | 
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9.6 % | 
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$ | 
36,593  | 
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8.2 % | 
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$ | 
73,375  | 
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9.4 % | 
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$ | 
74,049  | 
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8.9 % | 
 
| U.S. Federal Services | 
68,949  | 
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12.0 % | 
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50,978  | 
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15.4 % | 
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133,874  | 
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11.6 % | 
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103,230  | 
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14.0 % | 
 
| Outside the U.S. | 
24,011  | 
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11.7 % | 
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22,013  | 
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12.2 % | 
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45,351  | 
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11.7 % | 
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42,045  | 
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12.5 % | 
 
| Other (2)  | 
(926) | 
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NM | 
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2,818  | 
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NM | 
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1,928  | 
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NM | 
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5,045  | 
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NM | 
 
| Selling, general, and administrative expenses | 
$ | 
130,307  | 
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11.1 % | 
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$ | 
112,402  | 
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11.7 % | 
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$ | 
254,528  | 
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10.9 % | 
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$ | 
224,369  | 
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11.8 % | 
 
| Operating income/(loss): | 
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| U.S. Services | 
$ | 
46,698  | 
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11.7 % | 
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$ | 
82,847  | 
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18.5 % | 
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$ | 
101,295  | 
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12.9 % | 
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$ | 
144,393  | 
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17.3 % | 
 
| U.S. Federal Services | 
46,204  | 
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8.1 % | 
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23,155  | 
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7.0 % | 
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107,855  | 
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9.3 % | 
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53,399  | 
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7.3 % | 
 
| Outside the U.S. | 
4,316  | 
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2.1 % | 
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15,072  | 
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8.3 % | 
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(5,144) | 
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(1.3) % | 
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19,597  | 
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5.8 % | 
 
| Amortization of intangible assets | 
(22,856) | 
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NM | 
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(5,070) | 
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NM | 
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(45,261) | 
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NM | 
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(11,586) | 
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NM | 
 
| Other (2) | 
926  | 
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NM | 
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(2,818) | 
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NM | 
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(1,928) | 
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NM | 
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(5,045) | 
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NM | 
 
| Operating income/(loss) | 
$ | 
75,288  | 
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6.4 % | 
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$ | 
113,186  | 
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11.8 % | 
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$ | 
156,817  | 
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6.7 % | 
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$ | 
200,758  | 
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10.5 % | 
 
  
(1)Percentage of respective segment revenue. Percentages not considered meaningful are marked "NM."
 
(2)Other selling, general, and administrative expenses includes costs that are not allocated to a particular segment. This includes expenses incurred as part of our acquisitions, as well as potential acquisitions which have not been or may not be completed.
 
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