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Property, Plant and Equipment (Details) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2021 | Dec. 31, 2020
Property, plant and equipment [Abstract] |  |
Total property, plant and equipment | $ 906,683 | $ 868,827
Less: accumulated amortization and depreciation | 438,300 | 428,400
Property, plant and equipment, net | 468,383 | 440,427
Land |  |
Property, plant and equipment [Abstract] |  |
Total property, plant and equipment | $ 3,771 | 3,909
Land improvements |  |
Property, plant and equipment [Abstract] |  |
Estimated useful lives | 10 years |
Total property, plant and equipment | $ 3,141 | 2,910
Buildings and structures |  |
Property, plant and equipment [Abstract] |  |
Total property, plant and equipment | $ 92,974 | 91,335
Buildings and structures | Minimum |  |
Property, plant and equipment [Abstract] |  |
Estimated useful lives | 10 years |
Buildings and structures | Maximum |  |
Property, plant and equipment [Abstract] |  |
Estimated useful lives | 40 years |
Cable and fiber |  |
Property, plant and equipment [Abstract] |  |
Total property, plant and equipment | $ 407,341 | 390,209
Cable and fiber | Minimum |  |
Property, plant and equipment [Abstract] |  |
Estimated useful lives | 15 years |
Cable and fiber | Maximum |  |
Property, plant and equipment [Abstract] |  |
Estimated useful lives | 30 years |
Equipment and software |  |
Property, plant and equipment [Abstract] |  |
Total property, plant and equipment | $ 329,087 | 331,047
Equipment and software | Minimum |  |
Property, plant and equipment [Abstract] |  |
Estimated useful lives | 4 years |
Equipment and software | Maximum |  |
Property, plant and equipment [Abstract] |  |
Estimated useful lives | 8 years |
Plant in service |  |
Property, plant and equipment [Abstract] |  |
Total property, plant and equipment | $ 836,314 | 819,410
Plant under construction |  |
Property, plant and equipment [Abstract] |  |
Total property, plant and equipment | $ 70,369 | $ 49,417

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- Definition Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.13) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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- Definition Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment. + References No definition available. + Details
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