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ORGANIZATION AND BUSINESS OPERATIONS - Restructuring and reorganization expense (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended | 15 Months Ended | 21 Months Ended
--- | --- | --- | --- | ---
Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023 | Mar. 31, 2024 | Sep. 30, 2024
Restructuring Expense |  |  |  |  |  |
Restructuring Charges, Total | $ 2,345 | $ 1,383 | $ 3,535 | $ 4,640 |  |
Gain on lease termination |  |  |  | 300 |  |
Right of use assets terminated |  |  |  | 5,600 |  |
Lease liabilities terminated |  |  |  | 5,900 |  |
2023 Restructuring |  |  |  |  |  |
Restructuring Expense |  |  |  |  |  |
Employee termination benefits |  |  |  |  | $ 6,641 |
Contract termination costs |  |  |  |  | 5,777 |
Payments for restructuring |  |  | 5,700 |  |  |
Restructuring costs remain accrued | 1,300 |  | 1,300 |  |  | $ 1,300
Restructuring Charges, Total |  |  | 1,200 | $ 4,600 | 12,418 |
Restructure costs paid |  |  | 5,700 |  |  |
Total restructure costs paid |  |  |  |  |  | 11,400
Gain on lease termination |  |  |  |  |  | 300
Right of use assets terminated |  |  |  |  |  | 5,600
Lease liabilities terminated |  |  |  |  |  | 5,900
2024 Reorganization |  |  |  |  |  |
Restructuring Expense |  |  |  |  |  |
Contract termination costs | 2,300 |  |  |  |  |
Payments for restructuring | 700 |  |  |  |  |
Restructuring costs remain accrued | 1,600 |  | $ 1,600 |  |  | $ 1,600
Restructure costs paid | $ 700 |  |  |  |  |
US Telecom | 2023 Restructuring |  |  |  |  |  |
Restructuring Expense |  |  |  |  |  |
Employee termination benefits |  |  |  |  | 1,960 |
Contract termination costs |  |  |  |  | 5,777 |
Restructuring Charges, Total |  |  |  |  | 7,737 |
International Telecom | 2023 Restructuring |  |  |  |  |  |
Restructuring Expense |  |  |  |  |  |
Employee termination benefits |  |  |  |  | 4,681 |
Restructuring Charges, Total |  |  |  |  | $ 4,681 |

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