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Goodwill and Other Intangible Assets (Tables) | 12 Months Ended
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Sep. 30, 2022
Goodwill and Other Intangible Assets |
Schedule of goodwill and intangible assets | Included on the Consolidated Balance Sheets at September 30, 2022 and 2021 are the following intangible assets gross carrying amounts and accumulated amortization: ​
​ | ​ | ​ | ​ | ​ | ​
(Dollars in thousands) |  | 2022 |  | 2021
Goodwill | ​ | $ | 492,709 | ​ | 504,853
​ | ​ |  | ​ | ​ | ​
Intangible assets with determinable lives: | ​ |  | ​ | ​ | ​
Patents | ​ |  | ​ | ​ | ​
Gross carrying amount | ​ | $ | 2,353 | ​ | 2,131
Less: accumulated amortization | ​ |  | 1,091 | ​ | 972
Net | ​ | $ | 1,262 | ​ | 1,159
​ | ​ |  | ​ | ​ | ​
Capitalized software | ​ |  | ​ | ​ | ​
Gross carrying amount | ​ | $ | 106,583 | ​ | 93,671
Less: accumulated amortization | ​ |  | 70,476 | ​ | 63,740
Net | ​ | $ | 36,107 | ​ | 29,931
​ | ​ |  | ​ | ​ | ​
Customer Relationships | ​ |  | ​ | ​ | ​
Gross carrying amount | ​ | $ | 287,447 | ​ | 288,530
Less: accumulated amortization | ​ |  | 96,921 | ​ | 80,882
Net | ​ | $ | 190,526 | ​ | 207,648
​ | ​ |  | ​ | ​ | ​
Other | ​ |  | ​ | ​ | ​
Gross carrying amount | ​ | $ | 13,985 | ​ | 13,177
Less: accumulated amortization | ​ |  | 7,440 | ​ | 4,398
Net | ​ | $ | 6,545 | ​ | 8,779
Intangible assets with indefinite lives: | ​ |  | ​ | ​ | ​
Trade names | ​ | $ | 160,024 | ​ | 161,733
Schedule of carrying amount of goodwill attributable to each business segment | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
(Dollars in millions) |  | A&D |  | Test |  | USG |  | Total
Balance as of September 30, 2020 | ​ | $ | 102.1 |  | ​ | 34.1 |  | 271.9 |  | 408.1
Acquisition activity | ​ | ​ | 2.2 | ​ | ​ | — | ​ | 95.2 | ​ | 97.4
Foreign currency translation and other | ​ | ​ | — | ​ | ​ | — | ​ | (0.6) | ​ | (0.6)
Balance as of September 30, 2021 | ​ | $ | 104.3 | ​ | ​ | 34.1 | ​ | 366.5 | ​ | 504.9
Acquisition activity | ​ | ​ | 5.7 | ​ | ​ | — | ​ | (4.7) | ​ | 1.0
Foreign currency translation and other | ​ | ​ | — | ​ | ​ | (0.1) | ​ | (13.1) | ​ | (13.2)
Balance as of September 30, 2022 | ​ | $ | 110.0 | ​ | ​ | 34.0 | ​ | 348.7 | ​ | 492.7

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