v3.26.1
Business Segment Information (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Segment Reporting [Line Items]          
Total operating revenues $ 309,281 $ 298,541 $ 618,731 $ 588,974  
Selling, general and administrative 111,478 108,604 214,185 225,019  
Equity in earnings of unconsolidated entities 37,126 42,952 79,028 79,471  
Interest and dividend income 19,631 6,110 33,417 12,381  
Short-term imputed spectrum lease income 23,770 0 57,970 0  
Income (loss) before income taxes 447,697 9,984 681,532 (2,346)  
Depreciation, amortization and accretion (88,777) (86,022) (174,720) (170,349)  
Gain (loss) on asset disposals, net (8,769) (5,906) (10,579) (7,795)  
Gain (loss) on sale of business and other exit costs, net 0 7,879 (1,562) 8,877  
Gain (loss) on license sales and exchanges, net 402,280 3,700 553,158 4,800  
Interest expense (11,388) (29,166) (16,709) (53,074)  
Investments in unconsolidated entities 475,077 492,952 475,077 492,952 $ 461,922
Total assets 8,383,340 [1] 8,174,013 8,383,340 [1] 8,174,013 $ 8,398,303 [1]
Capital expenditures 183,633 94,588 319,862 158,731  
Service          
Segment Reporting [Line Items]          
Total operating revenues 249,179 265,128 499,600 521,744  
Cost of goods and services 124,031 116,395 242,773 233,602  
Equipment and product sales          
Segment Reporting [Line Items]          
Total operating revenues 6,927 6,183 14,932 13,405  
Cost of goods and services 5,294 5,500 11,040 12,127  
All Other          
Segment Reporting [Line Items]          
Total operating revenues 6,854 5,870 14,769 12,761  
Short-term imputed spectrum lease income 0   0    
Income (loss) before income taxes 1,282 (31,788) 3,736 (54,071)  
Depreciation, amortization and accretion (764) (886) (1,546) (1,780)  
Gain (loss) on asset disposals, net 0 (13) (74) (14)  
Gain (loss) on sale of business and other exit costs, net   (225) 0 797  
Gain (loss) on license sales and exchanges, net (9,153) 0 (14,910) 0  
Interest expense (196) (26,415) 1,506 (48,120)  
Investments in unconsolidated entities 49,523 44,853 49,523 44,853  
Total assets 1,878,413 245,856 1,878,413 245,856  
Capital expenditures 541 190 2,161 624  
Array | Operating segment          
Segment Reporting [Line Items]          
Total operating revenues 54,025 28,529 105,991 55,513  
Selling, general and administrative (22,906) (19,337) (35,651) (48,537)  
Expenses related to strategic alternatives review (included in Selling, general and administrative) 7,391 715 7,578 1,860  
Equity in earnings of unconsolidated entities 34,726 41,714 75,135 77,641  
Interest and dividend income 6,431 3,701 10,653 6,358  
Other segment items (13) 0 (26) 0  
Adjusted EBITDA 56,202 35,926 118,665 57,148  
Short-term imputed spectrum lease income 23,770   57,970    
Depreciation, amortization and accretion (14,428) (11,999) (27,032) (23,992)  
Gain (loss) on asset disposals, net (3,809) 313 (4,713) 87  
Gain (loss) on sale of business and other exit costs, net   0 0 0  
Gain (loss) on license sales and exchanges, net 409,833 3,700 566,468 4,800  
Interest expense (10,860) (3,711) (18,040) (7,378)  
Investments in unconsolidated entities 421,607 444,157 421,607 444,157  
Total assets 3,371,359 5,024,778 3,371,359 5,024,778  
Capital expenditures 3,895 4,211 12,541 9,051  
Array | Operating segment | Service          
Segment Reporting [Line Items]          
Cost of goods and services (23,497) (19,396) (45,106) (35,687)  
Array | Operating segment | Equipment and product sales          
Segment Reporting [Line Items]          
Cost of goods and services 0 0 0 0  
Array | Intersegment Revenues          
Segment Reporting [Line Items]          
Total operating revenues 45 0 91 0  
Array | Operating Segments Excluding Intersegment Elimination          
Segment Reporting [Line Items]          
Total operating revenues 54,070 28,529 106,082 55,513  
TDS Telecom          
Segment Reporting [Line Items]          
Total operating revenues 248,406 264,931 497,978 522,291  
TDS Telecom | Operating segment          
Segment Reporting [Line Items]          
Total operating revenues 248,402 264,142 497,971 520,700  
Selling, general and administrative (79,038) (82,555) (160,098) (165,702)  
Expenses related to strategic alternatives review (included in Selling, general and administrative) 0 0 87 0  
Equity in earnings of unconsolidated entities 0 0 0 0  
Interest and dividend income 463 1,693 1,608 3,094  
Other segment items 1,245 1,633 2,633 3,571  
Adjusted EBITDA 70,375 88,537 144,214 164,861  
Short-term imputed spectrum lease income 0   0    
Depreciation, amortization and accretion (73,585) (73,137) (146,142) (144,577)  
Gain (loss) on asset disposals, net (4,960) (6,206) (5,792) (7,868)  
Gain (loss) on sale of business and other exit costs, net   8,104 (1,562) 8,080  
Gain (loss) on license sales and exchanges, net 1,600 0 1,600 0  
Interest expense (332) 960 (175) 2,424  
Investments in unconsolidated entities 3,947 3,942 3,947 3,942  
Total assets 3,133,568 2,903,379 3,133,568 2,903,379  
Capital expenditures 179,197 90,187 305,160 149,056  
TDS Telecom | Operating segment | Service          
Segment Reporting [Line Items]          
Cost of goods and services (100,583) (97,049) (197,765) (198,013)  
TDS Telecom | Operating segment | Equipment and product sales          
Segment Reporting [Line Items]          
Cost of goods and services (118) (116) (229) (380)  
TDS Telecom | Intersegment Revenues          
Segment Reporting [Line Items]          
Total operating revenues 4 789 7 1,591  
TDS Telecom | Operating Segments Excluding Intersegment Elimination          
Segment Reporting [Line Items]          
Total operating revenues 248,406 264,931 497,978 522,291  
Total          
Segment Reporting [Line Items]          
Total operating revenues 302,427 292,671 603,962 576,213  
Expenses related to strategic alternatives review (included in Selling, general and administrative) (7,391) (715) (7,665) (1,860)  
Adjusted EBITDA 126,577 124,463 262,879 222,009  
Short-term imputed spectrum lease income 23,770   57,970    
Depreciation, amortization and accretion (88,013) (85,136) (173,174) (168,569)  
Gain (loss) on asset disposals, net (8,769) (5,893) (10,505) (7,781)  
Gain (loss) on sale of business and other exit costs, net   8,104 (1,562) 8,080  
Gain (loss) on license sales and exchanges, net 411,433 3,700 568,068 4,800  
Interest expense (11,192) (2,751) (18,215) (4,954)  
Investments in unconsolidated entities 425,554 448,099 425,554 448,099  
Total assets 6,504,927 7,928,157 6,504,927 7,928,157  
Capital expenditures 183,092 94,398 317,701 158,107  
Total | Intersegment Revenues          
Segment Reporting [Line Items]          
Total operating revenues 49 789 98 1,591  
Total | Operating Segments Excluding Intersegment Elimination          
Segment Reporting [Line Items]          
Total operating revenues 302,476 293,460 604,060 577,804  
Total | Intersegment Eliminations          
Segment Reporting [Line Items]          
Total operating revenues $ (49) $ (789) $ (98) $ (1,591)  
[1] The consolidated total assets as of June 30, 2026 and December 31, 2025, include assets held by current consolidated variable interest entities (VIEs) of $34.3 million and $35.5 million, respectively, which are not available to be used to settle the obligations of TDS. The consolidated total liabilities as of June 30, 2026 and December 31, 2025, include certain liabilities of current consolidated VIEs of $9.2 million and $9.6 million, respectively, for which the creditors of the VIEs have no recourse to the general credit of TDS. See Note 9 — Variable Interest Entities for additional information.