Description of Business and Accounting Policies - Narrative (Details) - USD ($)		3 Months Ended				6 Months Ended			18 Months Ended	23 Months Ended
	Aug. 02, 2024	Jun. 30, 2025	Jun. 30, 2024	Mar. 31, 2024	Dec. 31, 2023	Jun. 30, 2025	Jun. 30, 2024		Jun. 30, 2025	Jun. 30, 2025	Mar. 31, 2025	Dec. 31, 2024
Description of Business and Accounting Policies [Line Items]
Insurance proceeds received for damage to equipment						$ 500,000	$ 3,300,000	[1]
Other current liabilities		$ 120,800,000				120,800,000			$ 120,800,000	$ 120,800,000		$ 26,800,000
Other noncurrent liabilities		143,500,000				143,500,000			143,500,000	143,500,000		238,500,000
Income tax (benefit) expense		600,000	$ (2,600,000)			1,100,000	31,200,000
Loss from continuing operations before income taxes		17,500,000	$ 40,000,000			31,400,000	53,900,000
Benefit expected at statutory rates		3,700,000				6,600,000
Loss from Windstorm and Wildfires
Description of Business and Accounting Policies [Line Items]
Amount payable to resolve tort claims arising from wildfires	$ 4,037,000,000.000
Hawaiian Telcom [Member] | Loss from Windstorm and Wildfires
Description of Business and Accounting Policies [Line Items]
Amount payable to resolve tort claims arising from wildfires	$ 100,000,000
Other Noncurrent Liabilities [Member]
Description of Business and Accounting Policies [Line Items]
Incremental liability related to tort claims												$ 93,500,000
Accounts Receivable [Member]
Description of Business and Accounting Policies [Line Items]
Insurance receivable		7,100,000				7,100,000			7,100,000	7,100,000
Involuntary Events and Contingencies [Member]
Description of Business and Accounting Policies [Line Items]
Insurance proceeds received for damage to equipment				$ 3,000,000					7,000,000
Legal expense						300,000	$ 3,400,000			13,400,000
Proceeds from insurance		1,800,000
Involuntary Events and Contingencies [Member] | Other Current Assets [Member]
Description of Business and Accounting Policies [Line Items]
Offsetting receivable		96,600,000				96,600,000			96,600,000	96,600,000
Involuntary Events and Contingencies [Member] | Other Current Liabilities [Member]
Description of Business and Accounting Policies [Line Items]
General insurance liability		$ 97,500,000				$ 97,500,000			$ 97,500,000	$ 97,500,000	$ 97,500,000
One'Ohana Initiative Voluntary Fund [Member]
Description of Business and Accounting Policies [Line Items]
Insurance voluntary fund					$ 2,500,000

[1] Cash flows information includes cash flows from discontinued operations for the six months ended June 30, 2024.