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GOVERNMENT SUPPORT AND SPECTRUM MATTERS - Replace and Remove Program (Details) - USD ($)
$ in Thousands
 6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Mobility Fund [Line Items]    
Beginning balance, Total spend $ 64,388 $ 3,325
Amounts spent 47,654 17,705
Ending balance, Total spend 112,042 21,030
Beginning balance, Total reimbursements (17,127)  
Reimbursements received (52,142)  
Ending balance, Total reimbursements (69,269)  
Amount pending reimbursement 42,773 21,030
Capital Amount    
Mobility Fund [Line Items]    
Beginning balance, Total spend 49,262 1,836
Amounts spent 38,126 12,739
Ending balance, Total spend 87,388 14,575
Beginning balance, Total reimbursements (12,773)  
Reimbursements received (41,421)  
Ending balance, Total reimbursements (54,194)  
Amount pending reimbursement 33,194 14,575
Operating Amount    
Mobility Fund [Line Items]    
Beginning balance, Total spend 15,126 1,489
Amounts spent 9,528 4,966
Ending balance, Total spend 24,654 6,455
Beginning balance, Total reimbursements (4,354)  
Reimbursements received (10,721)  
Ending balance, Total reimbursements (15,075)  
Amount pending reimbursement $ 9,579 $ 6,455