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Business Combination (Recognized Identifiable Assets Acquired and Liabilities Assumed) (Details) - USD ($) $ in Thousands | Jun. 30, 2023 | Apr. 28, 2023 | Sep. 30, 2022
--- | --- | --- | ---
Business Acquisition [Line Items] |  |  |
Goodwill | $ 426,307 |  | $ 365,147
MPEG LA, L.L.C. |  |  |
Business Acquisition [Line Items] |  |  |
Cash and cash equivalents |  | $ 80,633 |
Restricted cash |  | 143,564 |
Other current assets |  | 73,556 |
Intangible assets |  | 86,000 |
Goodwill |  | 56,683 |
Other non-current assets |  | 39,029 |
Amounts payable to patent administrative program partner |  | (199,955) |
Other current liabilities |  | (22,205) |
Non-current liabilities |  | (37,612) |
Purchase Consideration |  | $ 219,693 |

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