Revenue Recognition - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Disaggregation of revenue
Revenue from contracts with customers	$ 255,344	$ 270,662	$ 513,076	$ 533,849
Operating lease income	53,937	27,879	105,655	55,125
Total operating revenues	309,281	298,541	618,731	588,974
Transferred over time
Disaggregation of revenue
Revenue from contracts with customers	248,417	264,479	498,144	520,444
Transferred over time \| Residential
Disaggregation of revenue
Revenue from contracts with customers	177,764	183,419	356,360	367,267
Transferred over time \| Commercial
Disaggregation of revenue
Revenue from contracts with customers	32,776	34,617	65,571	69,251
Transferred over time \| Wholesale
Disaggregation of revenue
Revenue from contracts with customers	37,006	45,960	74,380	83,882
Transferred over time \| Other service
Disaggregation of revenue
Revenue from contracts with customers	871	483	1,833	44
Transferred at point in time \| Equipment and product sales
Disaggregation of revenue
Revenue from contracts with customers	6,927	6,183	14,932	13,405
Array
Disaggregation of revenue
Revenue from contracts with customers	895	1,299	1,883	1,688
Operating lease income	53,175	27,230	104,199	53,825
Total operating revenues	54,070	28,529	106,082	55,513
Array \| Transferred over time
Disaggregation of revenue
Revenue from contracts with customers	895	1,299	1,883	1,688
Array \| Transferred over time \| Residential
Disaggregation of revenue
Revenue from contracts with customers	0	0	0	0
Array \| Transferred over time \| Commercial
Disaggregation of revenue
Revenue from contracts with customers	0	0	0	0
Array \| Transferred over time \| Wholesale
Disaggregation of revenue
Revenue from contracts with customers	0	0	0	0
Array \| Transferred over time \| Other service
Disaggregation of revenue
Revenue from contracts with customers	895	1,299	1,883	1,688
Array \| Transferred at point in time \| Equipment and product sales
Disaggregation of revenue
Revenue from contracts with customers	0	0	0	0
TDS Telecom
Disaggregation of revenue
Revenue from contracts with customers	247,595	264,187	496,424	520,792
Operating lease income	811	744	1,554	1,499
Total operating revenues	248,406	264,931	497,978	522,291
TDS Telecom \| Transferred over time
Disaggregation of revenue
Revenue from contracts with customers	247,546	263,996	496,311	520,400
TDS Telecom \| Transferred over time \| Residential
Disaggregation of revenue
Revenue from contracts with customers	177,764	183,419	356,360	367,267
TDS Telecom \| Transferred over time \| Commercial
Disaggregation of revenue
Revenue from contracts with customers	32,776	34,617	65,571	69,251
TDS Telecom \| Transferred over time \| Wholesale
Disaggregation of revenue
Revenue from contracts with customers	37,006	45,960	74,380	83,882
TDS Telecom \| Transferred over time \| Other service
Disaggregation of revenue
Revenue from contracts with customers	0	0	0	0
TDS Telecom \| Transferred at point in time \| Equipment and product sales
Disaggregation of revenue
Revenue from contracts with customers	49	191	113	392
All Other
Disaggregation of revenue
Revenue from contracts with customers	6,854	5,176	14,769	11,369
Operating lease income	(49)	(95)	(98)	(199)
Total operating revenues	6,805	5,081	14,671	11,170
All Other \| Transferred over time
Disaggregation of revenue
Revenue from contracts with customers	(24)	(816)	(50)	(1,644)
All Other \| Transferred over time \| Residential
Disaggregation of revenue
Revenue from contracts with customers	0	0	0	0
All Other \| Transferred over time \| Commercial
Disaggregation of revenue
Revenue from contracts with customers	0	0	0	0
All Other \| Transferred over time \| Wholesale
Disaggregation of revenue
Revenue from contracts with customers	0	0	0	0
All Other \| Transferred over time \| Other service
Disaggregation of revenue
Revenue from contracts with customers	(24)	(816)	(50)	(1,644)
All Other \| Transferred at point in time \| Equipment and product sales
Disaggregation of revenue
Revenue from contracts with customers	$ 6,878	$ 5,992	$ 14,819	$ 13,013