v3.26.1
GOVERNMENT SUPPORT AND SPECTRUM MATTERS - Communication Services Revenue (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
GOVERNMENT SUPPORT AND SPECTRUM PROGRAMS        
Revenue from contract with customer $ 170,549 $ 166,484 $ 338,496 $ 331,123
Government support revenue 11,850 12,768 23,668 25,440
Total 184,504 181,300 366,722 360,594
Communication services        
GOVERNMENT SUPPORT AND SPECTRUM PROGRAMS        
Total 180,141 174,874 358,599 348,905
High cost support | Communication services        
GOVERNMENT SUPPORT AND SPECTRUM PROGRAMS        
Government support revenue 3,495 4,471 6,970 8,899
High cost support | US Telecom | Communication services        
GOVERNMENT SUPPORT AND SPECTRUM PROGRAMS        
Government support revenue 3,495 3,101 6,970 6,216
High cost support | International Telecom | Communication services        
GOVERNMENT SUPPORT AND SPECTRUM PROGRAMS        
Government support revenue   1,370   2,683
CAF II (including ACF) | Communication services        
GOVERNMENT SUPPORT AND SPECTRUM PROGRAMS        
Government support revenue 8,280 8,227 16,548 16,397
CAF II (including ACF) | US Telecom | Communication services        
GOVERNMENT SUPPORT AND SPECTRUM PROGRAMS        
Government support revenue 8,280 8,227 16,548 16,397
RDOF | Communication services        
GOVERNMENT SUPPORT AND SPECTRUM PROGRAMS        
Revenue from contract with customer 75 69 150 144
RDOF | US Telecom | Communication services        
GOVERNMENT SUPPORT AND SPECTRUM PROGRAMS        
Revenue from contract with customer 75 69 150 144
Rural Health Care ("RHC") | Communication services        
GOVERNMENT SUPPORT AND SPECTRUM PROGRAMS        
Revenue from contract with customer 6,563 4,353 12,881 8,715
Rural Health Care ("RHC") | US Telecom | Communication services        
GOVERNMENT SUPPORT AND SPECTRUM PROGRAMS        
Revenue from contract with customer 6,563 4,353 12,881 8,715
Other | Communication services        
GOVERNMENT SUPPORT AND SPECTRUM PROGRAMS        
Revenue from contract with customer 1,465 1,571 2,910 3,212
Other | US Telecom | Communication services        
GOVERNMENT SUPPORT AND SPECTRUM PROGRAMS        
Revenue from contract with customer 1,461 1,567 2,904 3,204
Other | International Telecom | Communication services        
GOVERNMENT SUPPORT AND SPECTRUM PROGRAMS        
Revenue from contract with customer 4 4 6 8
USF, CAF II, RDOF, ECF, RHC and Other Programs | Communication services        
GOVERNMENT SUPPORT AND SPECTRUM PROGRAMS        
Total 19,878 18,691 39,459 37,367
USF, CAF II, RDOF, ECF, RHC and Other Programs | US Telecom | Communication services        
GOVERNMENT SUPPORT AND SPECTRUM PROGRAMS        
Total 19,874 17,317 39,453 34,676
USF, CAF II, RDOF, ECF, RHC and Other Programs | International Telecom | Communication services        
GOVERNMENT SUPPORT AND SPECTRUM PROGRAMS        
Total $ 4 $ 1,374 $ 6 $ 2,691