Segment Reporting - Selected Financial Data for Segments (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
External revenue
Service revenue and other	$ 64,414	$ 59,691
Operating expenses
Cost of services exclusive of depreciation and amortization	26,339	23,424
Selling, general and administrative	23,771	20,153
Restructuring expense	0	618
Depreciation and amortization	14,684	13,266
Operating income (loss)	(380)	2,230
Operating Segments
Operating expenses
Selling, general and administrative	23,771	20,153
Restructuring expense		618
Depreciation and amortization	14,684	13,266
Total operating expenses	64,794	57,461
Operating income (loss)	(380)	2,230
Operating Segments | Broadband
External revenue
Service revenue and other	59,714	55,154
Operating expenses
Selling, general and administrative	13,489	10,725
Restructuring expense		105
Depreciation and amortization	12,876	11,761
Total operating expenses	51,533	44,868
Operating income (loss)	8,181	10,286
Operating Segments | Tower
External revenue
Service revenue and other	4,847	4,665
Operating expenses
Selling, general and administrative	318	234
Restructuring expense		0
Depreciation and amortization	484	481
Total operating expenses	2,094	1,963
Operating income (loss)	2,753	2,702
Intersegment Eliminations
External revenue
Service revenue and other	4	4,595
Intersegment Eliminations | Broadband
External revenue
Service revenue and other	50	2,208
Intersegment Eliminations | Tower
External revenue
Service revenue and other	101	2,515
Intersegment Eliminations | Corporate & Eliminations
External revenue
Service revenue and other	(147)	(128)
Corporate, Non-Segment
Operating expenses
Selling, general and administrative	9,964	9,194
Restructuring expense		513
Depreciation and amortization	1,324	1,024
Total operating expenses	11,167	10,630
Operating income (loss)	(11,314)	(10,758)
Residential & SMB | Operating Segments
External revenue
Service revenue and other	46,913	42,930
Residential & SMB | Operating Segments | Broadband
External revenue
Service revenue and other	46,913	42,930
Residential & SMB | Operating Segments | Tower
External revenue
Service revenue and other	0	0
Commercial Fiber | Operating Segments
External revenue
Service revenue and other	9,062	6,385
Commercial Fiber | Operating Segments | Broadband
External revenue
Service revenue and other	9,062	6,385
Commercial Fiber | Operating Segments | Tower
External revenue
Service revenue and other	0	0
RLEC & Other | Operating Segments
External revenue
Service revenue and other	3,689	3,631
RLEC & Other | Operating Segments | Broadband
External revenue
Service revenue and other	3,689	3,631
RLEC & Other | Operating Segments | Tower
External revenue
Service revenue and other	0	0
Tower lease | Operating Segments
External revenue
Service revenue and other	4,746	2,150
Tower lease | Operating Segments | Broadband
External revenue
Service revenue and other	0	0
Tower lease | Operating Segments | Tower
External revenue
Service revenue and other	4,746	2,150
Service revenue and other | Operating Segments
External revenue
Service revenue and other	64,410	55,096
Service revenue and other | Operating Segments | Broadband
External revenue
Service revenue and other	59,664	52,946
Service revenue and other | Operating Segments | Tower
External revenue
Service revenue and other	4,746	2,150
Cost of services | Operating Segments
Operating expenses
Cost of services exclusive of depreciation and amortization	26,339	23,424
Cost of services | Operating Segments | Broadband
Operating expenses
Cost of services exclusive of depreciation and amortization	25,168	22,277
Cost of services | Operating Segments | Tower
Operating expenses
Cost of services exclusive of depreciation and amortization	1,292	1,248
Cost of services | Corporate, Non-Segment
Operating expenses
Cost of services exclusive of depreciation and amortization	$ (121)	$ (101)