Summary of Significant Accounting Policies - Narrative (Details) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2025 USD ($) segment plan $ / shares shares	Dec. 31, 2024 USD ($) $ / shares shares	Dec. 31, 2023 USD ($)	Oct. 01, 2025	Apr. 01, 2024 $ / shares
Finite-Lived Intangible Assets [Line Items]
Advertising expense	$ 15,900	$ 15,000	$ 11,400
Number of reportable segments | segment	1
Estimated fair value of goodwill exceeded the carrying value, percentage				8.00%
Number of frozen unfunded postretirement medical benefits plan | plan	2
Number of frozen defined benefit plan | plan	2
Issuance of redeemable noncontrolling interest (in shares) | shares		81
Issuance of redeemable noncontrolling interest, net of financing fees paid		$ 79,380
Paid in kind dividend percentage, increase after seventh anniversary		10.00%
Number of operating segments | segment	1
Energy Capital Partners
Finite-Lived Intangible Assets [Line Items]
Period for conversion of preferred stock		2 years
Preferred stock, convertible, common stock price trigger percentage		125.00%
Preferred stock, redemption period		5 years
Shentel Broadband Holding Inc.
Finite-Lived Intangible Assets [Line Items]
Paid in kind dividend percentage, increase after fifth anniversary		8.50%
Shentel Broadband Holding Inc. | Series A Preferred Stock
Finite-Lived Intangible Assets [Line Items]
Preferred stock, par value (in dollars per share) | $ / shares	$ 0.01
Preferred stock, shares outstanding | shares	81
Dividend percentage		7.00%
Payments of stock issuance costs	$ 1,600
Shentel Broadband Holding Inc. | Series A Preferred Stock | Energy Capital Partners
Finite-Lived Intangible Assets [Line Items]
Issuance of redeemable noncontrolling interest (in shares) | shares		81
Issuance of redeemable noncontrolling interest, net of financing fees paid		$ 81,000
Preferred stock, shares authorized (in shares) | shares	100
Conversion price per share (in dollars per share) | $ / shares	$ 24.50				$ 24.50
Purchase price (in dollars per share) | $ / shares		$ 1,000
Pension plan obligation
Finite-Lived Intangible Assets [Line Items]
Discount rate (as a percent)	5.00%	5.00%
Fair value of pension plan assets	$ 21,200	$ 21,600
Projected benefit obligation	$ 20,400	$ 21,400
Postretirement medical benefits plans
Finite-Lived Intangible Assets [Line Items]
Discount rate (as a percent)	5.40%	5.50%
Minimum
Finite-Lived Intangible Assets [Line Items]
Indefinite-lived intangible assets, useful life	10 years
Maximum
Finite-Lived Intangible Assets [Line Items]
Indefinite-lived intangible assets, useful life	15 years
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01
Finite-Lived Intangible Assets [Line Items]
Performance obligation period	1 year	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01
Finite-Lived Intangible Assets [Line Items]
Performance obligation period	1 year	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-01-01
Finite-Lived Intangible Assets [Line Items]
Performance obligation period	1 year