Significant Accounting Policies (Policies)	9 Months Ended
Significant Accounting Policies (Policies)	Sep. 30, 2018
Accounting Policies [Abstract]
Basis of Accounting, Policy [Policy Text Block]	Basis of Presentation. The condensed consolidated financial statements and accompanying notes thereto have been prepared in accordance with: (i) generally accepted accounting principles in the United States (“GAAP”) for interim financial information; and (ii) the guidance of Rule 10 - 01 of Regulation S- X under the Securities Exchange Act of 1934, as amended (the “Exchange Act”), for financial statements required to be filed with the Securities and Exchange Commission (the “SEC”). As permitted under such guidance, certain notes and other financial information normally required by GAAP have been omitted. Management believes the condensed consolidated financial statements reflect all normal and recurring adjustments necessary for a fair statement of the Company’s financial position, results of operations and cash flows as of and for the periods presented herein. These condensed consolidated financial statements are unaudited and should be read in conjunction with the Company’s audited consolidated financial statements and the notes thereto included in the Company’s Annual Report on Form 10 -K for the fiscal year ended December 31, 2017 ( the “2017 Form 10 -K”). The December 31, 2017 year-end balance sheet data presented herein was derived from the Company’s audited consolidated financial statements included in the 2017 Form 10 -K, but does not include all disclosures required by GAAP. The Company’s interim results of operations may not be indicative of its future results.
Consolidation, Policy [Policy Text Block]	Principles of Consolidation. The condensed consolidated financial statements include the accounts of the Company, including its subsidiaries. All intercompany accounts and transactions have been eliminated in consolidation.
Segment Reporting, Policy [Policy Text Block]	Segment Reporting. Accounting Standard Codification (“ASC”) 280 - Segment Reporting requires the disclosure of factors used to identify an entity’s reportable segments. The Company’s operations are organized and managed on the basis of cable systems within its geographic regions. Each cable system derives revenues from the delivery of similar products and services to a customer base that is also similar. Each cable system deploys similar technology to deliver the Company’s products and services, operates within a similar regulatory environment, has similar economic characteristics and is managed by the Company’s chief operating decision maker as part of an aggregate of all cable systems. Management evaluated the criteria for aggregation under ASC 280 and has concluded that the Company meets each of the respective criteria set forth therein. Accordingly, management has identified one reportable segment.
Use of Estimates, Policy [Policy Text Block]	Use of Estimates. The preparation of the condensed consolidated financial statements in conformity with GAAP requires management to make certain estimates and assumptions that affect the amounts reported herein. Management bases its estimates and assumptions on historical experience and on various other factors that are believed to be reasonable under the circumstances. Due to the inherent uncertainty involved in making estimates, actual results reported in future periods may be affected by changes in those estimates and underlying assumptions.
Revenue Recognition, Policy [Policy Text Block]	Revenue Recognition. The Company recognizes revenue in accordance with ASC 606 - Revenue from Contracts with Customers . Residential revenues are generated through individual and bundled subscriptions for data, video and voice services on month to month terms, without penalty for cancellation. As bundled subscriptions are typically offered at discounted rates, the sales price is allocated amongst the respective product lines based on the relative selling price at which each service is sold under standalone service agreements. Business revenues are generated through individual and bundled subscriptions for data, video and voice services under contracts with terms ranging from one month to several years. The Company also generally receives an allocation of scheduled advertising time as part of its distribution agreements with cable and broadcast networks, which the Company sells to local, regional and national advertisers under contracts with terms that are typically less than one year. In most instances, the available advertising time is sold directly by the Company’s internal sales force. As the Company is acting as principal in these arrangements, the advertising that is sold is reported as revenue on a gross basis. In instances where advertising time is sold by contracted third -party agencies, the Company is not acting as principal and the advertising sold is therefore reported net of agency fees. Advertising revenues are recognized when the related advertisements are aired. The unit of account for revenue recognition is a performance obligation, which is a requirement to transfer a distinct good or service to a customer. Customers are billed for the services to which they subscribe based upon published or contracted rates, with the sales price being allocated to each performance obligation. For arrangements with multiple performance obligations, the sales price is allocated based on the relative standalone selling price for each subscribed service. Generally performance obligations are satisfied, and revenue is recognized, over the period of time in which customers simultaneously receive and consume the Company’s defined performance obligations, which are delivered in a similar pattern of transfer. Advertising revenue is recognized at the point in time when the underlying performance obligation is complete. The Company also incurs certain incremental costs to acquire residential and business customers, such as commission costs and third -party costs to service specific customers. These costs are capitalized as contract assets and amortized over the applicable period. For commissions, the amortization period is the average customer tenure, which is approximately five years for both residential and business customers. All other costs are amortized over the requisite contract period.
New Accounting Pronouncements, Policy [Policy Text Block]	Recently Adopted Accounting Pronouncements. In May 2017, the Financial Accounting Standards Board (the “FASB”) issued Accounting Standards Update (“ASU”) No. 2017 - 09, Compensation – Stock Compensation (Topic 718 ): Scope of Modification Accounting . ASU 2017 - 09 provides guidance about which changes to the terms or conditions of a share-based payment award require an entity to apply modification accounting in accordance with ASC 718. The ASU was effective January 1, 2018. The adoption of this guidance did not have a material impact on the Company’s consolidated financial statements, but may have an impact in the future. In January 2017, the FASB issued ASU No. 2017 - 04, Intangibles - Goodwill and Other (Topic 350 ): Simplifying the Test for Goodwill Impairment. ASU 2017 - 04 removes step two of the previous goodwill impairment test under ASC 350 and replaces it with a simplified model. Under the simplified model, goodwill impairment will be calculated as the difference between the carrying amount of a reporting unit and its fair value, but not to exceed the carrying amount of goodwill. The amount of any impairment under the simplified model may differ from what would have been recognized under the previous two -step test. The ASU is effective for annual and any interim impairment tests performed for periods beginning after December 15, 2019, with early adoption permitted. The Company elected to early adopt the standard on January 1, 2018. The adoption of this guidance did not have a material impact on the Company’s consolidated financial statements, but may have an impact in the future. In January 2017, the FASB issued ASU No. 2017 - 01, Business Combinations (Topic 805 ): Clarifying the Definition of a Business . The purpose of the amendment is to clarify the definition of a business with the objective of adding guidance to assist entities with evaluating whether transactions should be accounted for as acquisitions (or disposals) of assets or businesses. The ASU was effective January 1, 2018. The adoption of this guidance did not have an impact on the Company’s consolidated financial statements as no asset acquisitions or business combinations have occurred since the effective date, but may have an impact in the future. In August 2016, the FASB issued ASU No. 2016 - 15, Statement of Cash Flows (Topic 230 ) : Classification of Certain Cash Receipts and Cash Payments . The guidance clarifies the way in which certain cash receipts and cash payments should be classified within the consolidated statements of cash flows and also how the predominance principle should be applied when cash receipts and cash payments have aspects of more than one class of cash flows. ASU 2016 - 15 was effective January 1, 2018. The adoption of this guidance did not have a material impact on the classification of any cash flows within the Company’s consolidated statements of cash flows, but may have an impact in the future. In May 2014, the FASB issued ASU No. 2014 - 09, Revenue from Contracts with Customers (Topic 606 ) . ASU 2014 - 09 provides new guidance related to how an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. The new standard provides a single principles-based, five step model to be applied to all contracts with customers: (i) identify the contract(s) with the customer, (ii) identify the performance obligation(s) in the contract, (iii) determine the transaction price, (iv) allocate the transaction price to the performance obligation(s) in the contract and (v) recognize revenue when each performance obligation is satisfied. The updated guidance also requires additional disclosures regarding the nature and timing of revenue recognition as well as any uncertainty surrounding potential revenue recognition. The Company adopted the updated guidance on January 1, 2018 on a full retrospective basis, which required all periods presented to reflect the impact of the updated guidance. Upon adoption, the Company also implemented changes in the presentation of certain revenues and expenses, which resulted in the deferral of all business installation revenues and residential and business customer acquisition costs, to be recognized over a period of time instead of immediately. The adoption of the new standard did not have a material impact on the Company’s consolidated financial statements for any period presented. Refer to note 3 for further details of the impact on the Company’s 2017 consolidated financial statements and the requisite disclosures pertaining to the transition to the new standard. Recently Issued But Not Yet Adopted Accounting Pronouncements. In August 2018, the FASB issued ASU No. 2018 - 15, Intangibles – Goodwill and Other – Internal-Use Software (Subtopic 350 - 40 ): Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement t hat i s a Service Contract . ASU 2018 - 15 aligns the requirements for capitalizing implementation, setup and other upfront costs incurred in a hosting arrangement that is a service contract with the requirements for capitalizing such costs incurred to develop or obtain internal-use software. The update specifies which costs are to be expensed and which are to be capitalized, the period over which capitalized costs are to be amortized, the process for identifying and recognizing impairment and the proper presentation of such costs within the consolidated financial statements. ASU 2018 - 15 is effective for annual and interim periods beginning after December 15, 2019, with early adoption permitted, and may be adopted either retrospectively or prospectively. The Company is currently evaluating the timing and method of adoption, as well as the expected impact on its consolidated financial statements. In June 2018, the FASB issued ASU No. 2018 - 07, Compensation – Stock Compensation (Topic 718 ): Improvements to Nonemployee Share-Based Payment Accounting . ASU 2018 - 07 expands the scope of ASC 718 to include share-based payment transactions for acquiring goods and services from nonemployees. The update is effective for the first quarter of 2019, with early adoption permitted. The Company does not expect ASU 2018 - 07 to have a material impact on the Company’s consolidated financial statements upon adoption, but it may have an impact in the future. In June 2016, the FASB issued ASU No. 2016 - 13, Financial Instruments – Credit Losses (Topic 326 ): Measurement of Credit Losses on Financial Instruments . ASU 2016 - 13 requires companies to recognize an allowance for expected lifetime credit losses through earnings concurrent with the recognition of a financial asset measured at amortized cost. The estimate of expected credit losses is required to be adjusted each reporting period over the life of the financial asset. The update is effective for annual and interim periods beginning after December 15, 2019, with early adoption permitted after December 15, 2018, and requires a modified retrospective adoption approach. The Company does not expect ASU 2016 - 13 to have a material impact on its consolidated financial statements upon adoption, but it may have an impact in the future. In February 2016, the FASB issued ASU No. 2016 - 02, Leases (Topic 842 ) . ASU 2016 - 02 requires lessees to record most of their leases on the balance sheet as a right-of-use asset and a corresponding lease liability. The Company will be required to classify each separate lease component as an operating or finance lease at the lease commencement date. Initial measurement of the right-of-use asset and lease liability is the same for both operating and finance leases, however, expense recognition and amortization of the right-of-use asset differs. Operating leases will reflect lease expense on a straight-line basis similar to current operating leases while finance leases will reflect a front-loaded expense pattern similar to current capital leases. The Company has identified several different categories of leases, such as buildings, land, towers, fiber and colocation sites. Various other categories have been or are currently being evaluated as to whether an actual or embedded lease exists. The Company’s adoption process of ASU 2016 - 02 is ongoing, including evaluating and quantifying the impact on its consolidated financial statements, implementing a selected technology solution and collecting and validating lease data. The Company will adopt the updated accounting guidance in the first quarter of 2019.