GOVERNMENT SUPPORT AND SPECTRUM MATTERS - Replace and Remove Program (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
GOVERNMENT SUPPORT AND SPECTRUM PROGRAMS
Beginning balance, Total spend	$ 233,696	$ 168,395
Amounts spent	8,437	13,676
Amounts transferred	(9,030)
Ending balance, Total spend	233,103	182,071
Beginning balance, Total reimbursements	(201,804)	(130,721)
Reimbursements received	(9,264)	(19,101)
Ending balance, Total reimbursements	(211,068)	(149,822)
Amount pending reimbursement	22,035	32,249
Capital Amount
GOVERNMENT SUPPORT AND SPECTRUM PROGRAMS
Beginning balance, Total spend	194,897	140,949
Amounts spent	6,304	11,051
Amounts transferred	(9,030)
Ending balance, Total spend	192,171	152,000
Beginning balance, Total reimbursements	(163,122)	(103,540)
Reimbursements received	(8,179)	(16,211)
Ending balance, Total reimbursements	(171,301)	(119,751)
Amount pending reimbursement	20,870	32,249
Operating Amount
GOVERNMENT SUPPORT AND SPECTRUM PROGRAMS
Beginning balance, Total spend	38,799	27,446
Amounts spent	2,133	2,625
Ending balance, Total spend	40,932	30,071
Beginning balance, Total reimbursements	(38,682)	(27,181)
Reimbursements received	(1,085)	(2,890)
Ending balance, Total reimbursements	(39,767)	$ (30,071)
Amount pending reimbursement	$ 1,165