Revenue - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2021	Dec. 31, 2023
Disaggregation Of Revenue [Line Items]
Payment terms for customers, lower range	30 days
Payment term for customers, upper range	120 days
Total	$ 214,900
Unearned revenue and customer deposits	50,600		$ 46,700
Broadband Expansion in Southwest Ohio [Member]
Disaggregation Of Revenue [Line Items]
Contract	50,000
Other Current Liabilities [Member]
Disaggregation Of Revenue [Line Items]
Unearned revenue and customer deposits	4,300		4,100
Other Noncurrent Liabilities [Member]
Disaggregation Of Revenue [Line Items]
Contract liabilities, recognized, noncurrent	$ 89,400		79,500
Dedicated Fiber Agreement [Member]
Disaggregation Of Revenue [Line Items]
Indefeasible right of use of contract term	20 years	20 years
Dedicated Fiber Agreement [Member] | Other Current Liabilities [Member]
Disaggregation Of Revenue [Line Items]
Unearned revenue and customer deposits	$ 2,200		2,100
Dedicated Fiber Agreement [Member] | Other Noncurrent Liabilities [Member]
Disaggregation Of Revenue [Line Items]
Contract liabilities, recognized, noncurrent	$ 63,500		$ 56,500
Minimum [Member]
Disaggregation Of Revenue [Line Items]
Customer contract term	1 year
SEA-US contract term	15 years
Indefeasible right of use of contract term	15 years
Maximum [Member]
Disaggregation Of Revenue [Line Items]
Customer contract term	5 years
SEA-US contract term	25 years
Indefeasible right of use of contract term	25 years
Indefeasible Right of Use, Maximum, in Years	30 years