WideOpenWest (WOW) 10-K 24 Feb 22 2021 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Feb. 18, 2022	Jun. 30, 2021
Document and Entity Information
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2021
Document Transition Report	false
Entity File Number	001-38101
Entity Registrant Name	WideOpenWest, Inc.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	46-0552948
Entity Address, Address Line One	7887 East Belleview Avenue
Entity Address, Address Line Two	Suite 1000
Entity Address, City or Town	Englewood
Entity Address, State or Province	CO
Entity Address, Postal Zip Code	80111
City Area Code	720
Local Phone Number	479-3500
Title of 12(b) Security	Common Stock
Trading Symbol	WOW
Security Exchange Name	NYSE
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	true
Entity Shell Company	false
Entity Public Float			$ 1,074.1
Entity Common Stock, Shares Outstanding		87,392,743
Auditor Name	BDO USA, LLP
Auditor Location	Atlanta, Georgia
Auditor Firm ID	243
Entity Central Index Key	0001701051
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	FY
Amendment Flag	false

CONDENSED CONSOLIDATED BALANCE

CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Millions		Dec. 31, 2021	Dec. 31, 2020
Current assets
Cash and cash equivalents		$ 193.2	$ 12.4
Accounts receivable-trade, net of allowance for doubtful accounts of $4.3 and $6.7, respectively		40.9	44.4
Accounts receivable-other, net		17.2	2.8
Prepaid expenses and other		30.7	16
Current assets held for sale			39.2
Total current assets		282	114.8
Right-of-use lease assets-operating		17.2	22.1
Property, plant and equipment, net		722.3	720.9
Franchise operating rights		620.1	620.1
Goodwill		225.1	225.1
Intangible assets subject to amortization, net		1.7	1.9
Other non-current assets		38.3	42.1
Non-current assets held for sale			740
Total assets		1,906.7	2,487
Current liabilities
Accounts payable-trade		50.3	32.4
Accrued interest		0.8	4
Current portion of long-term lease liability-operating		5.1	5.8
Accrued liabilities and other		218.7	79.7
Current portion of long-term debt and finance lease obligations		17.9	37.5
Current portion of unearned service revenue		28.1	28.6
Current liabilities held for sale			47.9
Total current liabilities		320.9	235.9
Long-term debt and finance lease obligations, net of debt issuance costs -less current portion		723.5	2,228.5
Long-term lease liability-operating		13.8	19
Deferred income taxes, net		257.6	200.6
Other non-current liabilities		20.1	13.1
Non-current liabilities held for sale			2.3
Total liabilities		1,335.9	2,699.4
Commitments and contingencies (Note 17)
Stockholders' equity (deficit):
Preferred stock, $0.01 par value, 100,000,000 shares authorized; 0 shares issued and outstanding
Common stock, $0.01 par value, 700,000,000 shares authorized; 96,225,910 and 95,187,161 issued as of December 31, 2021 and December 31, 2020, respectively; 87,392,088 and 86,847,797 outstanding as of December 31, 2021 and December 31, 2020, respectively		1	1
Additional paid-in capital		348.5	333.8
Accumulated other comprehensive income (loss)			(6.5)
Accumulated income (deficit)		310.5	(460)
Treasury stock at cost, 8,833,822 and 8,339,364 shares as of December 31, 2021 and December 31, 2020, respectively		(89.2)	(80.7)
Total stockholders' equity (deficit)	[1]	570.8	(212.4)
Total liabilities and stockholders' equity (deficit)		$ 1,906.7	$ 2,487
[1]	Included in outstanding shares as of December 31, 2021, 2020 and 2019 are 4,325,124, 4,990,971 and 3,140,168, respectively, of non-vested shares of restricted stock awards granted to employees and directors.

CONDENSED CONSOLIDATED BALANC_2

CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
CONDENSED CONSOLIDATED BALANCE SHEETS
Accounts receivable-trade, allowance for doubtful accounts	$ 4.3	$ 6.7
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)	100,000,000	100,000,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding ( in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	700,000,000	700,000,000
Common stock, shares issued (in shares)	96,225,910	95,187,161
Common stock, shares outstanding ( in shares)	87,392,088	86,847,797
Common shares held in treasury, (in shares)	8,833,822	8,339,364

CONDENSED CONSOLIDATED STATEMEN

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS
Revenue	$ 725.7	$ 730.2	$ 727
Costs and expenses:
Operating (excluding depreciation and amortization)	376.4	405.2	397.4
Selling, general and administrative	175.2	170.2	159.3
Depreciation and amortization	169.3	151	133.4
Impairment losses on intangibles and goodwill		14	9.7
Loss (gain) on sale of operating assets, net			5.4
Total costs and expenses	720.9	740.4	705.2
Income (loss) from operations	4.8	(10.2)	21.8
Other income (expense):
Interest expense	(93.5)	(130)	(141.9)
Loss on early extinguishment of debt	(3.2)
Other income, net	9.5	1.3	3.8
Loss from continuing operations before provision for income tax	(82.4)	(138.9)	(116.3)
Income tax benefit	13.8	30.6	33.9
Loss from continuing operations	(68.6)	(108.3)	(82.4)
Discontinued Operations (Note 1)
Income from discontinued operations, net of tax	839.1	122.7	118.8
Net income	$ 770.5	$ 14.4	$ 36.4
Basic and diluted (loss) per common share - continuing operations
Basic (in dollars per share)	$ (0.83)	$ (1.33)	$ (1.02)
Diluted (in dollars per share)	(0.83)	(1.33)	(1.02)
Basic and diluted earnings per common share - discontinued operations
Basic (in dollars per share)	10.14	1.51	1.47
Diluted (in dollars per share)	10.14	1.51	1.47
Basic and diluted earnings per common share
Basic (in dollars per share)	9.31	0.18	0.45
Diluted (in dollars per share)	$ 9.31	$ 0.18	$ 0.45
Weighted-average common shares outstanding
Basic (in shares)	82,720,934	81,561,707	80,713,926
Diluted (in shares)	82,720,934	81,561,707	80,713,926

CONDENSED CONSOLIDATED STATEM_2

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
Net income	$ 770.5	$ 14.4	$ 36.4
Unrealized gain on derivative instrument, net of tax	6.5	9	(9)
Comprehensive income	$ 777	$ 23.4	$ 27.4

CONDENSED CONSOLIDATED STATEM_3

CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (DEFICIT) - USD ($) $ in Millions		Common Stock		Treasury Stock at Cost	Additional Paid-in Capital	Accumulated Other Comprehensive Loss	Accumulated Deficit	Total
Balances at beginning of period at Dec. 31, 2018		$ 0.9		$ (78.1)	$ 312.7	$ (6.5)	$ (510.8)	$ (281.8)
Balances at beginning of period (in shares) at Dec. 31, 2018		82,680,380
Increase (Decrease) in Stockholders' Deficit
Changes in accumulated other comprehensive gain (loss)						(9)		(9)
Stock-based compensation					10.1			10.1
Issuance of restricted stock, net (in shares)		1,609,514
Purchase of shares				(1.6)				(1.6)
Purchase of shares (in shares)		(186,786)
Net income (loss)							36.4	36.4
Balances at end of period at Dec. 31, 2019	[1]	$ 0.9		(79.7)	322.8	(15.5)	(474.4)	(245.9)
Balances at end of period (in shares) at Dec. 31, 2019	[1]	84,103,108
Increase (Decrease) in Stockholders' Deficit
Changes in accumulated other comprehensive gain (loss)						9		9
Stock-based compensation		$ 0.1			11			11.1
Issuance of restricted stock, net (in shares)		3,004,954
Purchase of shares				(1)				(1)
Purchase of shares (in shares)		(260,265)
Net income (loss)							14.4	14.4
Balances at end of period at Dec. 31, 2020	[1]	$ 1		(80.7)	333.8	(6.5)	(460)	$ (212.4)
Balances at end of period (in shares) at Dec. 31, 2020		86,847,797	[1]					86,847,797
Increase (Decrease) in Stockholders' Deficit
Changes in accumulated other comprehensive gain (loss)						$ 6.5		$ 6.5
Stock-based compensation					14.7			14.7
Issuance of restricted stock, net (in shares)		1,038,749
Purchase of shares				(8.5)				(8.5)
Purchase of shares (in shares)		(494,458)
Net income (loss)							770.5	770.5
Balances at end of period at Dec. 31, 2021	[1]	$ 1		$ (89.2)	$ 348.5		$ 310.5	$ 570.8
Balances at end of period (in shares) at Dec. 31, 2021		87,392,088	[1]					87,392,088
[1]	Included in outstanding shares as of December 31, 2021, 2020 and 2019 are 4,325,124, 4,990,971 and 3,140,168, respectively, of non-vested shares of restricted stock awards granted to employees and directors.

CONDENSED CONSOLIDATED STATEM_4

CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' DEFICIT (Parenthetical) - Restricted stock awards - shares	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Number of shares granted to employees and directors	4,325,124	4,990,971	3,140,168
Common Stock
Number of shares granted to employees and directors	4,325,124	4,990,971	3,140,168

CONDENSED CONSOLIDATED STATEM_5

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Cash flows from operating activities:
Net income	$ 770.5	$ 14.4	$ 36.4
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	210.3	230.6	206.2
Deferred income taxes	54.9	5.3	4.3
Provision for doubtful accounts	11.2	16.8	16.9
Gain on sale of markets	(1,001.3)
(Gain) loss on sale of assets, net	(0.5)		5.4
Amortization of debt issuance costs and discount	4.7	4.7	4.7
Loss on debt extinguishment	3.2
Impairment losses on intangibles and goodwill		14	9.7
Non-cash compensation	15.3	11.1	10.1
Other non-cash items	(0.2)	(0.2)	0.6
Changes in operating assets and liabilities:
Receivables and other operating assets	(27.9)	(28.1)	(25.2)
Payables and accruals	133.8	8.8	(2.8)
Net cash provided by operating activities	174	277.4	266.3
Cash flows from investing activities:
Capital expenditures	(207.7)	(234.1)	(247.5)
Proceeds from sale of markets, net	1,765.7		24.7
Other investing activities	1.3	(0.2)	(1.3)
Net cash provided by (used in) investing activities	1,559.3	(234.3)	(224.1)
Cash flows from financing activities:
Proceeds from issuance of long-term debt, net	762.1	91	80
Payments on long-term debt and finance lease obligations	(2,303.5)	(141.7)	(112.8)
Payments of debt issuance costs	(2.6)
Purchase of shares	(8.5)	(1)	(1.6)
Net cash used in by financing activities	(1,552.5)	(51.7)	(34.4)
Increase (decrease) in cash and cash equivalents	180.8	(8.6)	7.8
Cash and cash equivalents, beginning of period	12.4	21	13.2
Cash and cash equivalents, end of period	193.2	12.4	21
Supplemental disclosures of cash flow information:
Cash paid during the periods for interest	93.1	124	139
Cash paid during the periods for income taxes	97.1	1.5	1.6
Cash received during the periods for refunds of income taxes		4.6	4.4
Insurance proceeds received for business interruption			9.6
Non-cash financing activities:
Other financing arrangements		1.1
Capital expenditure accounts payable and accruals	$ 27.4	$ 19.1	$ 16.8

Organization and Basis of Prese

Organization and Basis of Presentation	12 Months Ended
	Dec. 31, 2021
Organization and Basis of Presentation
Organization and Basis of Presentation	1. Organization and Basis of Presentation Organization ​ WideOpenWest, Inc. (“WOW” or the “Company”) is a leading broadband services provider offering high-speed data ("HSD"), cable television ("Video"), and digital telephony ("Telephony") services to residential and business customers. The Company serves customers in 14 markets in the United States which consist of Detroit and Lansing, Michigan; Augusta, Columbus, Newnan and West Point, Georgia; Charleston, South Carolina; Dothan, Auburn, Huntsville and Montgomery, Alabama; Knoxville, Tennessee; and Panama City and Pinellas County, Florida. Basis of Presentation ​ The accompanying financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America ("GAAP") and the rules and regulations of the Securities and Exchange Commission (the “SEC”). ​ These accounting principles require management to make assumptions and estimates that affect the reported amounts and disclosures of assets and liabilities, disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts and disclosures of revenues and expenses during the reporting period. The Company bases its estimates on historical experience and on various other assumptions that it believes are reasonable under the circumstances. However, due to the inherent uncertainties in making estimates, actual results could differ from those estimates. Certain reclassifications have been made to prior period amounts to conform to the current period financial statement presentation with no effect on the Company’s previously reported results of operations, financial position, or cash flows. ​ Discontinued Operations – Sale of Service Areas ​ On June 30, 2021, WOW entered into an Asset Purchase Agreement with Atlantic Broadband (OH), LLC, (“Atlantic”), a U.S. cable operator and subsidiary of Cogeco Communications, Inc. and Atlantic Broadband Finance, LLC, a Delaware limited liability company (the “Atlantic Purchase Agreement”), whereby Atlantic agreed to acquire the Company’s Cleveland and Columbus, Ohio markets for approximately $1.125 billion, subject to adjustments, including customary working capital adjustments, as specified in the Atlantic Purchase Agreement. The sale was completed on September 1, 2021. Refer to Note 5 – Asset Sales for additional information regarding the sale. ​ Additionally, on June 30, 2021, WOW entered into an Asset Purchase Agreement with Radiate HoldCo, LLC, a telecommunications holding company affiliated with RCN Telecom Services LLC, Grande Communications Networks, LLC and WaveDivision Holdings, LLC (collectively, “Astound Broadband”) (the “Astound Purchase Agreement”), whereby Radiate HoldCo, LLC agreed to acquire the Company’s Chicago, Illinois, Evansville, Indiana and Baltimore, Maryland markets for approximately $661.0 million, subject to adjustments, including customary working capital adjustments, as specified in the Astound Purchase Agreement. The sale was completed on November 1, 2021. Refer to Note 5 – Asset Sales for additional information regarding the sale. ​ The divestiture of these markets represents a strategic shift in WOW’s business as the markets represented approximately 37% of total revenue for the three and six months ended June 30, 2021 and as such were presented as discontinued operations in the Form 10-Q for the period ending June 30, 2021. The Company will continue to present these markets as discontinued operations in the consolidated statements of operations and exclude from continuing operations for all periods in which such discontinued operations are presented. Results of discontinued operations include all revenues and direct expenses of these markets. General corporate overhead is not allocated to discontinued operations. ​ In connection with the divestitures, the Company has entered into a transition services agreement under which WOW will continue to provide certain services to Atlantic and Astound Broadband. Under the transition services agreements, the buyers may elect a variety of services, including but not limited to: information technology, network, business support services, etc. The term of the transition services agreements optional extensions costs ​ The assets and liabilities sold under the Atlantic Purchase Agreement and the Astound Purchase Agreement were written off on September 1, 2021 and November 1, 2021, respectively. The amounts presented for the period ended December 31, 2020 include the assets and liabilities sold under the Atlantic Purchase Agreement and the Astound Purchase Agreement: ​ ​ ​ ​ ​ ​ ​ December 31, ​ 2020 ​ ​ (in millions) Assets ​ Current assets ​ Accounts receivable—trade, net of allowance for doubtful accounts of $1.8 ​ $ 25.1 Accounts receivable—other, net ​ 0.9 Prepaid expenses and other ​ 13.2 Total current assets ​ 39.2 Right-of-use lease assets—operating ​ ​ 2.8 Property, plant and equipment, net ​ 379.4 Franchise operating rights ​ 165.4 Goodwill ​ 183.7 Intangible assets subject to amortization, net ​ 0.2 Other non-current assets ​ 8.5 Total assets ​ $ 779.2 Liabilities ​ Current liabilities ​ Accounts payable—trade ​ $ 11.4 Current portion of long-term lease liability—operating ​ ​ 0.7 Accrued liabilities and other ​ 18.9 Current portion of unearned service revenue ​ 16.9 Total current liabilities ​ 47.9 Long-term lease liability—operating ​ ​ 2.3 Total liabilities ​ $ 50.2 ​ The following table presents information regarding certain components of income from discontinued operations: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Year ended December 31, ​ ​ 2021 (1) 2020 ​ 2019 ​ ​ (in millions) Revenue ​ $ 308.3 ​ $ 418.2 ​ $ 418.8 Costs and expenses: ​ ​ ​ ​ Operating (excluding depreciation and amortization) ​ 112.0 ​ 165.0 ​ 178.4 Selling, general and administrative ​ 11.8 ​ 12.3 ​ 13.0 Depreciation and amortization ​ 41.0 ​ 79.6 ​ 72.8 ​ ​ 164.8 ​ 256.9 ​ 264.2 Income from operations ​ 143.5 ​ 161.3 ​ 154.6 Other income (expense): ​ ​ ​ ​ Interest income (expense) ​ ​ 0.4 ​ ​ (0.7) ​ ​ (0.2) Gain on sale of assets, net ​ ​ 1,001.8 ​ ​ — ​ ​ — Other income, net ​ 0.1 ​ 0.5 ​ (0.2) Income from discontinued operations before provision for income tax ​ 1,145.8 ​ 161.1 ​ 154.2 Income tax expense ​ (306.7) ​ (38.4) ​ (35.4) Income from discontinued operations ​ $ 839.1 ​ $ 122.7 ​ $ 118.8 (1) Includes the activity for the Cleveland and Columbus, Ohio markets through September 1, 2021 and the Chicago, Illinois, Evansville, Indiana, and Baltimore, Maryland markets through November 1, 2021. ​ The following table presents revenue by service offering from discontinued operations: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Year ended December 31, ​ 2021(1) 2020 2019 ​ ​ (in millions) Residential subscription ​ ​ ​ ​ ​ ​ ​ ​ ​ HSD ​ $ 150.1 ​ $ 185.6 ​ $ 170.4 Video ​ 103.2 ​ 157.4 ​ ​ 166.2 Telephony ​ 11.5 ​ 16.9 ​ ​ 18.9 Total Residential subscription ​ $ 264.8 ​ $ 359.9 ​ $ 355.5 Business subscription ​ ​ ​ ​ ​ ​ ​ ​ ​ HSD ​ $ 17.8 ​ $ 22.6 ​ $ 21.3 Video ​ ​ 2.7 ​ ​ 3.6 ​ ​ 3.6 Telephony ​ ​ 8.4 ​ ​ 11.9 ​ ​ 12.1 Total business subscription ​ $ 28.9 ​ $ 38.1 ​ $ 37.0 Total subscription services revenue ​ ​ 293.7 ​ ​ 398.0 ​ ​ 392.5 Other business services revenue ​ ​ 1.6 ​ ​ 1.9 ​ ​ 2.8 Other revenue ​ ​ 13.0 ​ ​ 18.3 ​ ​ 23.5 Total revenue ​ $ 308.3 ​ $ 418.2 ​ $ 418.8 (1) Includes the activity for the Cleveland and Columbus, Ohio markets through September 1, 2021 and the Chicago, Illinois, Evansville, Indiana, and Baltimore, Maryland markets through November 1, 2021. The following table presents specified items of cash flow and significant non-cash items of discontinued operations: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Year ended December 31, ​ 2021 (1) 2020 2019 ​ ​ (in millions) Specified items of cash flow: ​ ​ ​ ​ ​ Capital expenditures ​ $ 45.4 ​ $ 62.7 ​ $ 103.2 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Non-cash operating activities: ​ ​ ​ ​ ​ ​ ​ ​ Operating lease additions ​ $ 0.7 ​ $ 0.7 ​ $ — Non-cash investing activities: ​ ​ ​ ​ ​ ​ ​ ​ ​ Capital expenditure accounts payable and accruals ​ $ — ​ $ 2.1 ​ $ 1.0 (1) Includes the activity for the Cleveland and Columbus, Ohio markets through September 1, 2021 and the Chicago, Illinois, Evansville, Indiana, and Baltimore, Maryland markets through November 1, 2021. (1)

Summary of Significant Accounti

Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2021
Summary of Significant Accounting Policies
Summary of Significant Accounting Policies	2. Summary of Significant Accounting Policies Principles of Consolidation The accompanying consolidated financial statements of WOW reflect all transactions of WideOpenWest, Inc. and its wholly owned subsidiaries. All significant intercompany accounts and transactions have been eliminated in consolidation. ​ Cash and Cash Equivalents Cash equivalents represent short-term investments consisting of money market funds that are carried at cost, which approximates fair value. The Company considers all short-term investments with an original maturity of three months or less at the date of purchase to be cash equivalents. Provision for Doubtful Accounts The provision for doubtful accounts and the allowance for doubtful accounts are based on historical trends. The Company’s policy to reserve for potential bad debts is based on the aging of the individual receivables. The Company manages credit risk by disconnecting services to customers who are delinquent, generally after 100 days of delinquency. The individual receivables are written-off after all reasonable efforts to collect the funds have been made. Actual write-offs may differ from the amounts reserved. See Note 3 – Revenue from Contracts with Customers for a discussion of changes in the allowance for doubtful accounts for the periods presented. Prepaid Expenses and Other Prepaid expenses and other primarily consists of short-term deferred contract costs and prepaid software and insurance costs. Prepayments are recognized as operating expenses or selling, general, and administrative expense over the life of the underlying agreements. Property, Plant and Equipment Property, plant and equipment are stated at cost less accumulated depreciation and amortization and primarily represent costs associated with the construction of cable transmission and distribution facilities and new service installations at the customer location. Capitalized costs include materials, labor, and certain indirect costs attributable to the capitalization activity. Maintenance and repairs are expensed as incurred. Upon sale or retirement of an asset, the cost and related depreciation and amortization are removed from the related accounts and resulting gains or losses are reflected in operating results. The Company makes judgments regarding the installation and construction activities to be capitalized. The Company capitalizes direct labor associated with capitalizable activities and indirect costs using standards developed from operational data, including the proportionate time to perform a new installation relative to the total installation activities and an evaluation of the nature of the indirect costs incurred to support capitalizable activities. Judgment is required to determine the extent to which indirect costs incurred are related to capitalizable activities. Indirect costs include (i) employee benefits and payroll taxes associated with capitalized direct labor, (ii) direct variable costs of installation and construction, (iii) the direct variable costs of support personnel directly involved in assisting with installation activities, such as dispatchers and (iv) other indirect costs directly attributable to capitalizable activities. Property, plant and equipment are depreciated over the estimated useful life upon being placed into service. Depreciation of property, plant and equipment is calculated on a straight-line basis, over the following estimated useful lives: ​ ​ ​ ​ ​ ​ ​ Estimated Useful Asset Category Lives (Years) Office and technical equipment 3 - 10 ​ Computer equipment and software 3 ​ Customer premise equipment 5 ​ Vehicles 5 ​ Telephony infrastructure ​ 5 - 7 ​ Headend equipment 7 ​ Distribution facilities 10 ​ Building and leasehold improvements 5 - 20 ​ ​ Leasehold improvements are depreciated over the shorter of the estimated useful lives or lease terms. Intangible Assets and Goodwill Intangible assets consist primarily of acquired franchise operating rights and goodwill. Franchise operating rights represent the value attributable to agreements with local franchising authorities, which allow access to homes in the public right of way. The Company’s franchise operating rights were acquired through business combinations. The Company does not amortize franchise operating rights as it has been determined that they have an indefinite life. Costs incurred in negotiating and renewing franchise operating agreements are expensed as incurred. Franchise related customer relationships represent the value to the Company of the benefit of acquiring the existing cable subscriber base and are amortized over the estimated life of the subscriber base (four years) on a straight-line basis, which is shorter than the economic useful life, which approximates an accelerated method. Goodwill represents the excess purchase price over the fair value of the identifiable net assets acquired in business combinations. Asset Impairments Significant judgment by management is required to determine estimates and assumptions used in the valuation of property, plant and equipment, intangible assets and goodwill. Long-lived Assets The Company evaluates the recoverability of its long-lived assets whenever events or substantive changes in circumstances indicate that the carrying amount may not be recoverable. The evaluation is based on the undiscounted cash flows generated by the underlying asset groups, including estimated future operating results, trends or other determinants of fair value. If the total of the expected future undiscounted cash flows was determined to be less than the carrying amount of the asset group, the Company would recognize an impairment charge to the extent the carrying amount of the asset group exceeds its estimated fair value. The Company had no triggering events or impairment of its long-lived assets in any of the periods presented. Franchise Operating Rights The Company evaluates the recoverability of its franchise operating rights at least annually on October 1, or more frequently whenever events or substantive changes in circumstances indicate that the assets might be impaired. The Company evaluates the franchise operating rights for impairment by comparing the carrying value of the intangible asset to its estimated fair value utilizing both quantitative and qualitative methods. Any excess of the carrying value over the fair value would be expensed as an impairment loss. The Company calculates the fair value of franchise operating rights using the multi-period excess earnings method, an income approach, which calculates the value of an intangible asset by discounting its future cash flows. The fair value is determined based on estimated discrete discounted future cash flows attributable to each franchise operating right intangible asset using assumptions consistent with internal forecasts. Assumptions key in estimating fair value under this method include, but are not limited to, revenue and subscriber growth rates (less anticipated customer churn), operating expenditures, capital expenditures (including any build out), market share achieved, contributory asset charge rates, tax rates and discount rate. The discount rate used in the model represents a weighted average cost of capital and the perceived risk associated with an intangible asset such as franchise operating rights. See Note 7 – Franchise Operating Rights & Goodwill for discussion of impairment charges recognized for the periods presented. Goodwill The Company assesses the recoverability of its goodwill at least annually on October 1, or more frequently whenever events or substantive changes in circumstances indicate that the asset might be impaired. The Company may first choose to assess qualitative factors to determine whether it is more likely than not that the fair value of a reporting unit is less than its carrying amount, including goodwill. If the Company determines that it is more likely than not that the fair value of a reporting unit is less than its carrying amount, then the Company performs a quantitative analysis. The Company may also choose to by-pass the qualitative assessment and proceed directly to the quantitative analysis. In the quantitative analysis, the Company utilizes a discounted cash flow analysis or a market approach to estimate the fair value of goodwill and compares such value to the carrying amount. Any excess of the carrying value of goodwill over the estimated fair value of goodwill would be expensed as an impairment loss. The Company determined it had one reporting unit as part of its annual goodwill analysis on October 1. See Note 7 – Franchise Operating Rights & Goodwill for a discussion of impairment charges recognized for the periods presented. Other Noncurrent Assets Other noncurrent assets are comprised primarily of long-term deferred contract costs and long-term software costs. These amounts are recognized as operating expenses or selling, general, and administrative expense over the period of usage. Fair Value of Financial Instruments Carrying amounts reported in the consolidated balance sheets for cash and cash equivalents are carried at fair value. The carrying amounts reported in the consolidated balance sheets for accounts receivable and accounts payable approximate fair value due to their short-term maturities. The fair value of long-term debt is based on the debt’s variable rate of interest and the Company’s own credit risk and risk of nonperformance, as required by GAAP. Certain financial instruments potentially subject the Company to concentrations of credit risk. These financial instruments consist primarily of trade receivables and cash and cash equivalents. The Company places its cash and cash equivalents with high credit quality financial institutions. The Company does not enter into master netting arrangements. The Company periodically assesses the creditworthiness of the institutions with which it invests. The Company does, however, maintain invested balances in excess of federally insured limits; however, the Company has never experienced any losses related to these balances. Debt Issuance Costs Debt issuance costs incurred by the Company are capitalized and amortized over the life of the related debt using the effective interest rate method and are included as a reduction in long-term debt in the accompanying consolidated balance sheets. The amortization of debt issuance costs is included in interest expense on the accompanying consolidated statements of operations. Asset Retirement Obligations The Company accounts for its asset retirement obligations by recognizing a liability for the fair value of a conditional asset retirement obligation when incurred if the fair value of the liability can be reasonably estimated. Certain of the Company’s franchise agreements and leases contain provisions requiring the Company to restore facilities or remove equipment upon the maturity of the franchise or lease agreement. The Company expects to continually renew its franchise agreements. Accordingly, the Company has determined a remote possibility that the Company would be required to incur significant restoration or removal costs related to these franchise agreements in the foreseeable future. An estimated liability, which could be significant, would be recorded in the unlikely event a franchise agreement containing such a provision were no longer expected to be renewed. An estimate of the obligations related to the removal provisions contained in the Company’s lease agreements has been made and recorded in other non-current liabilities in the consolidated balance sheet; however, the amount is not material. Revenue Recognition Residential and business subscription services revenue consists primarily of monthly recurring charges for HSD, Video, and Telephony services, including charges for equipment rentals and other regulatory fees, and non-recurring charges for optional services, such as pay-per-view, video-on-demand, and other events provided to the customer. Monthly charges for residential and business subscription services are billed in advance and recognized as revenue over the period of time the associated services are provided to the customer. Charges for optional services are generally billed in arrears and revenues are recognized at the point in time when the services are provided to the customer. Residential and business customers may be charged non-recurring upfront fees associated with installation and other administrative activities. Charges for upfront fees associated with installation and other administrative activities are initially recorded as unearned service revenue and recognized as revenue over the expected period of benefit for residential customers and over the contract term for business customers. The Company is required to pay certain cable franchising authorities an amount based on the percentage of gross revenue derived from Video services. The Company generally passes these fees and other similar regulatory and ancillary fees on to the customer. Revenues from regulatory and other ancillary fees passed on to the customer are reported with the associated service revenue and the corresponding costs are reported as an operating expense. ​ The Company’s trade receivables are subject to credit risk, as customer deposits are generally not required. The Company’s credit risk is limited due to the large number of customers, individually small balances and short payment terms. The Company manages credit risk by screening applicants through the use of internal customer information, identification verification tools and credit bureau data. If a customer account is delinquent, various measures are used to collect amounts owed, including termination of the customer’s service. Costs and Expenses The Company’s expenses consist of operating, selling, general and administrative expenses, depreciation and amortization expense and interest expense. Business interruption insurance proceeds are recorded to operating expense in the statements of operations. Programming Costs Programming is acquired for distribution to subscribers, generally pursuant to multi-year license agreements, with rates typically based on the number of subscribers that receive the programming. These programming costs are included in operating expenses in the month the programming is distributed. Advertising Costs The cost of advertising is expensed as incurred and is included in selling, general and administrative expenses in the accompanying consolidated statements of operations. Advertising expense during the years ended December 31, 2021, 2020 and 2019 was $39.5 million, $38.0 million and $32.3 million, respectively. Income Taxes The Company accounts for income taxes under the asset and liability method. Under this method, deferred tax liabilities and assets are determined based on the difference between the financial statement and tax basis of assets and liabilities using enacted tax rates in effect for the year in which the difference is expected to reverse. Additionally, the impact of changes in the tax rates and laws on deferred taxes, if any, is reflected in the financial statements in the period of enactment. Valuation allowances are established to reduce deferred tax assets to the amount that will more likely than not be realized. To the extent that a determination was made to establish or adjust a valuation allowance, the expense or benefit is recorded in the period in which the determination is made. ​ From time to time, the Company engages in transactions in which the tax consequences may be subject to uncertainty. Significant judgment is required in assessing and estimating the tax consequences of these transactions. The Company prepares and files tax returns based on its interpretation of tax laws and regulations. In the normal course of business, the tax returns are subject to examination by various taxing authorities. Such examinations may result in future tax, interest and penalty assessments by these taxing authorities. In determining the Company’s income tax provision for financial reporting purposes, the Company establishes a reserve for uncertain income tax positions unless such positions are determined to be more likely than not of being sustained upon examination, based on their technical merits. That is, for financial reporting purposes, the Company only recognizes tax benefits taken on the tax return that the Company believes are more likely than not of being sustained upon examination. There is considerable judgment involved in determining whether positions taken on the tax return are more likely than not of being sustained. The Company adjusts its tax reserve estimates periodically because of ongoing examinations by, and settlements with, the various taxing authorities, as well as changes in tax laws, regulations and interpretations. The consolidated income tax provision of any given year includes adjustments to prior year income tax accruals that are considered appropriate and any related estimated interest and penalties. The Company’s policy is to recognize, when applicable, interest and penalties on uncertain income tax positions as part of income tax provision. Derivative Financial Instruments The Company may use derivative financial instruments to manage its exposure to fluctuations in interest rates by entering into interest rate exchange agreements such as interest rate swaps. All derivatives, whether designated as a hedge or not, are required to be recorded on the consolidated balance sheet at fair value. If the derivative is designated as a hedge and is highly effective as a hedging instrument, recognition of changes in fair value depend on whether the derivative is used in a fair value hedge, in which changes are recognized in earnings, or cash flow hedge, in which changes are recognized in other comprehensive income. If the derivative is not designated as a hedge, changes in the fair value of the derivative are recognized in earnings. Refer to Note 11 – Derivative Instruments and Hedging Activities for a discussion of hedging activities for the periods presented. Stock-based Compensation The Company’s stock-based compensation consists of liability and equity based restricted stock awards with service, performance and market conditions. Restricted stock awards are measured at the grant date fair value and amortized to stock compensation expense over the requisite service period. The fair value of restricted stock awards with market conditions is measured utilizing Monte Carlo simulations. Awards with performance or market conditions will vest based on the Company’s achievement level relative to specific requirements. For all restricted stock awards, the Company accounts for forfeitures as they occur. Refer to Note 13 – Stock-Based Compensation for a discussion of the Company’s stock-based compensation for the periods presented. Segments The Company’s chief operating decision maker (“CODM”) regularly reviews the Company’s results to assess the Company’s performance and allocates resources at a consolidated level. Although the consolidated results include the Company’s three products (i) HSD; (ii) Video; and (iii) Telephony and are used to assess performance by product(s), decisions to allocate resources (including capital) are made to benefit the consolidated Company. The three products are delivered through a unified network and have similar types or classes of customers. Furthermore, the decision to allocate resources to plant maintenance and to upgrade the Company’s service delivery over a unified network to the customer benefits all three product offerings and is not based on any given service product. As such, management has determined that the Company has one reportable segment, broadband services. Recently Issued Accounting Pronouncements ASU 2020-04, Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting ​ In March 2020, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2020-04, Reference Rate Reform (Topic 848), Facilitation of the Effects of Reference Rate Reform on Financial Reporting (“ASU 2020-04”). ASU 2020-04 provides optional guidance, expedients and exceptions for a limited period of time to ease the potential burden in accounting for (or recognizing the effects of) reference rate reform on financial reporting. The amendments in this update apply to all entities, subject to meeting the criteria, which participate in contracts, hedging relationships and other transactions that reference LIBOR or another reference rate expected to be discontinued because of reference rate reform. ASU 2020-04 was subsequently amended by ASU 2021-01, Reference Rate Reform (Topic 848), Scope, which refines the scope of Topic 848 and permits optional expedients and exceptions when accounting for derivative contracts and certain hedging relationships. The amendments of these updates are available to all entities as of March 12, 2020 through December 31, 2022. The Company has not yet adopted these amendments, but has determined the impact of adopting this guidance will not have a material impact on its financial position, results of operations and cash flows. Recently Adopted Accounting Pronouncements ASU 2019-12, Income Taxes —Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes ​ In December 2019, the FASB issued ASU 2019-12, Income Taxes (Topic 740), Simplifying the Accounting for Income Taxes (“ASU 2019-12”). ASU 2019-12 simplifies the accounting for income taxes by removing certain exceptions to the general principles in Topic 740. The amendments also improve consistent application of and simplify GAAP for other areas of Topic 740 by clarifying and amending existing guidance. ASU 2019-12 is effective for public business entities for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2020. The Company adopted this guidance prospectively as of January 1, 2021. The adoption did not have a material impact on the Company’s financial position, results of operations or cash flows. ​

Revenue from Contracts with Cus

Revenue from Contracts with Customers	12 Months Ended
	Dec. 31, 2021
Revenue from Contracts with Customers
Revenue from Contracts with Customers	3. Revenue from Contracts with Customers Residential and Business Subscription Services Residential and business subscription services revenue consists primarily of monthly recurring charges for HSD, Video, and Telephony services, including charges for equipment rentals and other regulatory fees, and non-recurring charges for optional services, such as pay-per-view, video-on-demand, and other events provided to the customer. Monthly charges for residential and business subscription services are billed in advance and recognized as revenue over the period of time the associated services are provided to the customer. Charges for optional services are generally billed in arrears and revenue is recognized at the point in time when the services are provided to the customer. ● HSD revenue consists primarily of fixed monthly fees for data service, including charges for rentals of modems, and revenue recognized related to non-recurring upfront fees associated with installation and other administrative activities provided to HSD customers. ● Video revenue consists of fixed monthly fees for basic, premium and digital cable television services, including charges for rentals of video converter equipment, other regulatory fees, and revenue recognized related to non-recurring upfront fees associated with installation and other administrative activities provided to video customers, as well as non-recurring charges for optional services, such as pay-per-view, video-on-demand and other events provided to the customer. ● Telephony revenue consists of fixed monthly fees for local services, including certain regulatory and ancillary customer fees, and enhanced services, such as call waiting and voice mail, revenue recognized related to non-recurring upfront fees associated with installation and other administrative activities provided to telephony customers as well as charges for measured and flat rate long-distance service. While a portion of residential customers have entered into contracts for subscription services ranging from 12 months to 24 months in length, the Company recognizes revenue for these customers on a basis that is consistent with customers that have entered into month-to-month contracts as the early termination fees within these contracts are not considered to be material. The Company’s business customers have entered into non-cancellable contracts for subscription services averaging 30 months. The Company is required to pay certain cable franchising authorities an amount based on the percentage of gross revenue derived from video services. The Company generally passes these fees and other similar regulatory and ancillary fees on to the customer. Revenues from regulatory and other ancillary fees passed on to the customer are reported with the associated service revenue and the corresponding costs are reported as an operating expense. Bundled Subscription Services The Company often markets multiple subscription services as part of a bundled arrangement that may include a discount. When customers have entered into a bundled service arrangement, the total transaction price for the bundled arrangement is allocated between the separate services included in the bundle based on their relative stand-alone selling prices. The allocation of the transaction price in bundled services requires judgment, particularly in determining the stand-alone selling prices for the separate services included in the bundle. The stand-alone selling price for the majority of services are determined based on the prices at which the Company separately sells the service. For services sold on an infrequent basis and for a wide range of prices, the Company estimates stand-alone selling prices using the adjusted market assessment approach, which considers the prices of competitors for similar services. Other Business Services Revenue Other business services revenue consists primarily of monthly recurring charges for session initiated protocol, web hosting, metro ethernet, wireless backhaul, broadband carrier, and cloud infrastructure services provided to business customers. Other business services revenue also includes recurring charges for wholesale and colocation services. Monthly charges for other business services are generally billed in advance and recognized as revenue when the associated services are provided to the customer. Other Revenue Other revenue consists primarily of revenue from line assurance warranty services provided to residential and business customers and revenue from advertising placement. Monthly charges for line assurance warranty services are generally billed in advance and recognized as revenue over the period of time the warranty services are provided to the customer. Charges for advertising placement are generally billed in arrears and recognized as revenue at the point in time when the advertising is distributed. Revenue by Service Offering The following table presents revenue by service offering: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Year ended December 31, ​ 2021 2020 2019 ​ ​ (in millions) Residential subscription ​ ​ ​ ​ ​ ​ ​ ​ ​ HSD ​ $ 329.0 ​ $ 294.5 ​ $ 270.3 Video ​ 204.1 ​ 236.4 ​ ​ 251.2 Telephony ​ 28.5 ​ 35.6 ​ ​ 41.0 Total Residential subscription ​ $ 561.6 ​ $ 566.5 ​ $ 562.5 Business subscription ​ ​ ​ ​ ​ ​ ​ ​ ​ HSD ​ $ 70.1 ​ $ 64.5 ​ $ 59.0 Video ​ ​ 11.4 ​ ​ 11.4 ​ ​ 11.0 Telephony ​ ​ 28.9 ​ ​ 29.7 ​ ​ 30.7 Total business subscription ​ $ 110.4 ​ $ 105.6 ​ $ 100.7 Total subscription services revenue ​ ​ 672.0 ​ ​ 672.1 ​ ​ 663.2 Other business services revenue(1) ​ ​ 22.3 ​ ​ 23.4 ​ ​ 24.6 Other revenue ​ ​ 31.4 ​ ​ 34.7 ​ ​ 39.2 Total revenue ​ $ 725.7 ​ $ 730.2 ​ $ 727.0 (1) Includes wholesale and colocation lease revenue of $19.4 million for both years ended December 31, 2021 and 2020 and $18.8 million for the year ended 2019. Costs of Obtaining Contracts with Customers The Company recognizes an asset for incremental costs of obtaining contracts with customers when it expects to recover those costs. Costs which would be incurred regardless of whether a contract is obtained are expensed as they are incurred. Costs of obtaining contracts with customers are amortized over the expected period of benefit, which generally ranges from three five The following table summarizes the activity of costs of obtaining contracts with customers: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2021 ​ 2020 ​ 2019 ​ ​ (in millions) Balance at beginning of period ​ $ 31.8 ​ $ 20.9 ​ $ 6.5 Deferral ​ 15.5 ​ 17.4 ​ 18.1 Amortization ​ (10.0) ​ (6.5) ​ (3.7) Balance at end of period ​ $ 37.3 ​ $ 31.8 ​ $ 20.9 ​ The following table presents the current and non-current costs of obtaining contracts with customers as of the end of the corresponding periods: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2021 ​ December 31, 2020 ​ ​ (in millions) Current costs of obtaining contracts with customers ​ $ 14.1 ​ $ 3.6 Non-current costs of obtaining contracts with customers ​ ​ 23.2 ​ ​ 28.2 Total costs of obtaining contracts with customers ​ $ 37.3 ​ $ 31.8 ​ Contract Liabilities Monthly charges for residential and business subscription services are billed in advance and recorded as unearned service revenue. Residential and business customers may be charged non-recurring upfront fees associated with installation and other administrative activities. Charges for upfront fees associated with installation and other administrative activities are initially recorded as unearned service revenue and recognized as revenue over the expected period of benefit for residential customers, which has been estimated as five months, and over the contract term for business customers, which has been estimated as 30 months. The Company has estimated the expected period of benefit for residential customers based on consideration of quantitative and qualitative factors including the average installation fee charged, the average monthly revenue per customer, and customer behavior. The current portion and the non-current portion of contract liabilities are included in current portion of unearned service revenue and other non-current liabilities, respectively, in the Company’s consolidated balance sheets. The following tables present the activity of current and non-current contract liabilities: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2021 ​ 2020 ​ 2019 ​ ​ (in millions) Balance at beginning of period ​ $ 2.9 ​ $ 2.8 ​ $ 2.6 Deferral ​ 12.4 ​ 8.8 ​ 9.7 Revenue recognized ​ (12.0) ​ (8.7) ​ (9.5) Balance at end of period ​ $ 3.3 ​ $ 2.9 ​ $ 2.8 ​ The following table presents the current and non-current portion of contract liabilities as of the end of the corresponding periods: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2021 ​ December 31, 2020 ​ ​ (in millions) Current contract liabilities ​ $ 2.9 ​ $ 2.4 Non-current contract liabilities ​ ​ 0.4 ​ ​ 0.5 Total contract liabilities ​ $ 3.3 ​ $ 2.9 ​ Unsatisfied Performance Obligations Revenue from month-to-month residential subscription service contracts have historically represented a significant portion of the Company’s revenue and the Company expects that this will continue to be the case in future periods. All residential subscription service performance obligations will be satisfied within one year. A summary of expected business subscription and other business services revenue to be recognized in future periods related to performance obligations which have not been satisfied or are partially unsatisfied as of December 31, 2021 is set forth in the table below: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2022 2023 2024 Thereafter Total ​ ​ (in millions) Subscription services ​ $ 39.2 ​ $ 20.2 ​ $ 8.0 ​ $ 2.5 ​ $ 69.9 Other business services ​ 3.3 ​ 1.5 ​ 0.6 ​ — ​ 5.4 Total expected revenue ​ $ 42.5 ​ $ 21.7 ​ $ 8.6 ​ $ 2.5 ​ $ 75.3 ​ Provision for Doubtful Accounts ​ The provision for doubtful accounts and the allowance for doubtful accounts are based on the aging of the individual receivables, historical trends and current and anticipated future economic conditions. The Company manages credit risk by disconnecting services to customers who are delinquent, generally after 100 days of delinquency. The individual receivables are written-off after all reasonable efforts to collect the funds have been made. Actual write-offs may differ from the amounts reserved. ​ The following table presents the change in the allowance for doubtful accounts for trade accounts receivable: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Year ended ​ ​ December 31, ​ 2021 2020 ​ ​ (in millions) Balance at beginning of period ​ $ 6.7 ​ $ 6.4 Provision charged to expense ​ 8.3 ​ 11.6 Accounts written off, net of recoveries ​ (10.7) ​ (11.3) Balance at end of period ​ $ 4.3 ​ $ 6.7 ​ ​ The Company had accounts written off, net of recoveries, of non-trad e accounts receivable of $0.2 million for the year ended December 31, 2020. The Company did no t have such write-offs for the year ended December 31, 2021.

Property, Plant and Equipment,

Property, Plant and Equipment, Net	12 Months Ended
	Dec. 31, 2021
Property, Plant and Equipment, Net
Property, Plant and Equipment, Net	4. Property, Plant and Equipment Property, plant and equipment consist of the following: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ December 31, ​ 2021 2020 ​ ​ (in millions) Distribution facilities ​ $ 1,238.3 ​ $ 1,148.8 Customer premise equipment ​ 267.7 ​ 266.2 Head-end equipment ​ 228.5 ​ 209.5 Telephony infrastructure ​ 52.4 ​ 52.5 Computer equipment and software ​ 132.5 ​ 102.5 Vehicles ​ 23.7 ​ 22.7 Buildings and leasehold improvements ​ 32.1 ​ 31.0 Office and technical equipment ​ 18.9 ​ 18.7 Land ​ 4.4 ​ 4.4 Construction in progress (including material inventory and other) ​ 34.9 ​ 32.8 Total property, plant and equipment ​ 2,033.4 ​ 1,889.1 Less accumulated depreciation ​ (1,311.1) ​ (1,168.2) ​ ​ $ 722.3 ​ $ 720.9 ​ Depreciation expense for the years ended December 31, 2021, 2020 and 2019 was $168.9 million, $150.1 million, and $131.6 million, respectively. ​

Asset Sales

Asset Sales	12 Months Ended
	Dec. 31, 2021
Discontinued Operations and Disposal Groups [Abstract]
Asset Sales	Note 5. Asset Sales Sale of Five Service Areas On June 30, 2021, the Company entered into the Atlantic Purchase Agreement and the Astound Purchase Agreement for approximately $1.125 billion and $661.0 million, respectively. Refer to Note 1 – Organization and Basis of Presentation for a discussion of the Company’s discontinued operations. ​ The Atlantic Purchase Agreement closed on September 1, 2021, as a result of which the Company received net proceeds of $1.1 billion and recorded a gain of $689.8 million. Additionally, the Astound Purchase Agreement was completed on November 1, 2021, as a result of which the Company received net proceeds of $653.2 million and recorded a gain of $311.5 million. The gains are reported within discontinued operations in the consolidated statement of operations for the year ended December 31, 2021. ​ As of December 31, 2021, the Company utilized the net proceeds from the sales to repay and refinance its long-term debt. Refer to Note 10 – Long-Term Debt and Finance Lease Obligations for additional information. ​ In connection with the closing of the Atlantic Purchase Agreement and the Astound Purchase Agreement, the Company entered into a one year Transition Services Agreement ​ Income earned under these agreements is presented in other income, net in the consolidated statement of operations and associated receivables are presented in accounts receivable – other, net in the Company’s consolidated balance sheet as of December 31, 2021. The Company recognized $8.5 million of income related to the Transition Services Agreements for the year ended December 31, 2021. ​

Leases

Leases	12 Months Ended
	Dec. 31, 2021
Leases
Leases	6. Leases The Company leases certain property, vehicles and equipment for use in its operations. The Company determines if an arrangement is or contains a lease at inception. The Company has lease agreements with lease and non-lease components and has elected to not separate these components for all classes of underlying assets. Leases with an initial term of 12 months or less are not recorded on the consolidated balance sheet. Leases with initial terms greater than 12 months are recorded as operating or financing leases on the consolidated balance sheet. As of December 31, 2021, financing lease assets of $22.7 million are included in property, plant and equipment on the consolidated balance sheet. Financing lease liabilities are included within the current long-term ​ Right-of-use lease assets and lease liabilities are recognized upon lease commencement based on the present value of the future minimum lease payments over the lease term. The Company utilizes a collateralized incremental borrowing rate based on information available at the lease commencement date in determining the present value of future payments, unless the rate is implicit in the lease agreement. The operating and finance leases may contain variable payments for common-area maintenance, taxes and insurance, and repairs and maintenance. Variable payments are recognized when incurred and not included in the measurement of the right-of-use asset and lease liability. In instances where customer premise equipment would qualify as a lease, the Company applies the practical expedient to combine the operating lease with the subscription revenue as a single performance obligation in accordance with revenue recognition accounting guidance as the subscription service is the predominant component. ​ The Company’s lease agreements may contain options to extend the lease term beyond the initial term, termination options, and options to purchase the underlying asset. The Company has not included these options in the lease term or the related payments in the measurement of the ROU asset and lease liabilities as the Company has determined the options are not reasonably certain to be exercised. ​ Lease components are classified as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Year ended ​ ​ ​ ​ December 31, ​ ​ Classification ​ ​ 2021 ​ 2020 ​ ​ ​ ​ (in millions) Finance lease cost ​ ​ ​ ​ ​ ​ ​ ​ Amortization of leased asset ​ Depreciation ​ $ 10.1 $ 7.6 Interest on lease liabilities ​ Interest expense ​ ​ 1.1 ​ ​ 1.2 Operating lease cost(1) ​ Operating expense ​ ​ 8.0 ​ ​ 8.0 Sublease income ​ Other income ​ ​ (0.5) ​ ​ — Net lease cost ​ ​ ​ $ 18.7 ​ $ 16.8 (1) Includes short-term lease and variable costs of $1.2 and $1.1 million for the years ended December 31, 2021 and 2020, respectively. ​ The following table presents aggregate lease maturities as of December 31, 2021: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Finance Leases Operating Leases Total ​ ​ (in millions) 2022 $ 10.9 ​ $ 6.0 ​ $ 16.9 2023 ​ ​ 7.7 ​ ​ 5.0 ​ ​ 12.7 2024 ​ ​ 3.8 ​ ​ 4.0 ​ ​ 7.8 2025 ​ ​ 0.7 ​ ​ 2.7 ​ ​ 3.4 2026 ​ ​ 0.3 ​ ​ 1.8 ​ ​ 2.1 Thereafter ​ ​ — ​ ​ 2.1 ​ ​ 2.1 Total lease payments ​ ​ 23.4 ​ ​ 21.6 ​ ​ 45.0 Less: interest ​ ​ 1.1 ​ ​ 2.7 ​ ​ 3.8 Present value of lease liabilities ​ $ 22.3 ​ $ 18.9 ​ $ 41.2 ​ The following table presents aggregate lease maturities as of December 31, 2020: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Finance Leases Operating Leases Total ​ ​ (in millions) 2021 $ 15.5 ​ $ 7.1 ​ $ 22.6 2022 ​ ​ 11.8 ​ ​ 6.4 ​ ​ 18.2 2023 ​ ​ 5.8 ​ ​ 4.9 ​ ​ 10.7 2024 ​ ​ 1.3 ​ ​ 3.9 ​ ​ 5.2 2025 ​ ​ 0.4 ​ ​ 2.6 ​ ​ 3.0 Thereafter ​ ​ — ​ ​ 3.9 ​ ​ 3.9 Total lease payments ​ ​ 34.8 ​ ​ 28.8 ​ ​ 63.6 Less: interest ​ ​ 1.9 ​ ​ 4.0 ​ ​ 5.9 Total lease payments ​ $ 32.9 ​ $ 24.8 ​ $ 57.7 ​ The following table presents weighted average remaining lease terms and discount rates: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Year ended December 31, ​ ​ 2021 ​ ​ 2020 Weighted-average remaining lease term (in years) ​ ​ ​ ​ ​ Finance Leases ​ 2.5 ​ ​ 2.6 ​ Operating Leases ​ 4.5 ​ ​ 5.0 ​ Weighted-average discount rate ​ ​ ​ ​ ​ ​ Finance Leases ​ 4.02 % ​ 4.49 % Operating Leases ​ 5.75 % ​ 5.96 % ​ The following table presents other information related to operating and finance leases: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Year ended December 31, ​ ​ 2021 ​ 2020 ​ ​ (in millions) Cash paid for amounts included in the measurement of lease liabilities: ​ ​ ​ ​ ​ ​ Operating cash flows from operating leases $ 6.4 $ 6.6 Operating cash flows from finance leases ​ ​ 1.1 ​ ​ 1.2 Financing cash flows from finance leases ​ ​ 22.2 ​ ​ 10.7 Right-of-use assets obtained in exchange for lease obligations: ​ ​ ​ ​ ​ ​ Finance leases ​ ​ 11.5 ​ ​ 20.5 Operating leases ​ ​ 1.0 ​ ​ 5.8 ​

Franchise Operating Rights & Go

Franchise Operating Rights & Goodwill	12 Months Ended
	Dec. 31, 2021
Franchise Operating Rights & Goodwill
Franchise Operating Rights & Goodwill	7. Franchise Operating Rights & Goodwill Changes in the carrying amounts of the Company’s franchise operating rights and goodwill during 2021 and 2020 are set forth below: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ January 1, ​ ​ ​ December 31, ​ 2021 Impairment 2021 ​ ​ (in millions) Franchise operating rights ​ $ 620.1 ​ $ — ​ $ 620.1 Goodwill ​ 225.1 ​ — ​ 225.1 ​ ​ $ 845.2 ​ $ — ​ $ 845.2 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ January 1, ​ ​ ​ December 31, ​ 2020 Impairment 2020 ​ ​ (in millions) Franchise operating rights ​ $ 634.1 ​ $ (14.0) ​ $ 620.1 Goodwill ​ 225.1 ​ — ​ 225.1 ​ ​ $ 859.2 ​ $ (14.0) ​ $ 845.2 ​ Franchise Operating Rights The Company evaluates the recoverability of its franchise operating rights at least annually on October 1, or more frequently whenever events or substantive changes in circumstances indicate that the assets might be impaired. Franchise operating rights are evaluated for impairment by comparing the carrying value of the intangible asset to its estimated fair value, utilizing both quantitative and qualitative methods, at the lowest level of identifiable cash flows, which generally represent the markets in which the Company operates. Qualitative analysis is performed for franchise assets in the event the previous analysis indicates that there is a significant margin between the estimated fair value of franchise operating rights and the carrying value of those rights, and that it is more likely than not that the estimated fair value equals or exceeds its carrying value. For franchise operating rights that were evaluated using quantitative analysis, the Company calculates the estimated fair value of franchise operating rights using the multi-period excess earnings method, an income approach, which calculates the estimated fair value of an intangible asset by discounting its future cash flows. The estimated fair value is determined based on discrete discounted future cash flows attributable to each franchise operating right intangible asset using assumptions consistent with internal forecasts. Assumptions key in estimating fair value under this method include, but are not limited to, revenue and subscriber growth rates (less anticipated customer churn), operating expenditures, capital expenditures (including any build out), market share achieved or market multiples, contributory asset charge rates, tax rates and a discount rate. The discount rate used in the model represents a weighted average cost of capital and the perceived risk associated with an intangible asset such as the Company’s franchise operating rights. If the fair value of the franchise operating right asset was less than its carrying value, the Company recognizes an impairment charge for the difference between the fair value and the carrying value of the asset. The Company recognized non-cash impairment losses of nil, $14.0 million, and $9.7 million for the years ended December 31, 2021, 2020, and 2019, respectively. The primary driver of the impairment charges in the years presented was a decline in estimated fair market value of indefinite-lived intangible assets in certain markets, as indicated by the decline in the Company’s common stock and revisions to market-level forecasts during such periods. The impairment charges do not have an impact on the Company’s intent and/or ability to renew or extend existing franchise operating rights. Goodwill The Company evaluates goodwill for impairment at least annually on October 1, at the reporting unit level utilizing both quantitative and qualitative methods. Qualitative analysis is performed for goodwill in the event the previous analysis indicates that there is a significant margin between estimated fair value and carrying value of goodwill, and that it is more likely than not that the estimated fair value exceeds the carrying value. In the event that a quantitative analysis is performed, any excess of the carrying value of goodwill over the estimated fair value of goodwill is expensed as an impairment loss. The Company determines the estimated fair value utilizing a market approach that incorporates the approximate market capitalization as of the annual testing date, increased by the quoted market price of the Company’s debt and adjusted for a control premium. For the current year and prior two year analysis, the estimated fair value of goodwill exceeded the carrying value, as such, no impairment charge was recognized. ​ The Company had accumulated impairment losses of $193.9 million for the years ended December 31, 2021 and 2020.

Intangible Assets Subject to Am

Intangible Assets Subject to Amortization	12 Months Ended
	Dec. 31, 2021
Intangible Assets Subject to Amortization
Intangible Assets Subject to Amortization	8. Intangible Assets Subject to Amortization Intangible assets subject to amortization consist primarily of multiple-dwelling unit and customer relationships. Changes in the carrying amounts during 2021 and 2020 are set forth below: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ January 1, ​ ​ ​ ​ ​ ​ ​ December 31, ​ 2021 Acquisitions Amortization 2021 ​ ​ (in millions) Other ​ $ 1.9 ​ $ 0.2 ​ $ (0.4) ​ $ 1.7 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ January 1, ​ ​ ​ ​ ​ ​ ​ December 31, ​ 2020 Acquisitions Amortization 2020 ​ ​ (in millions) Customer relationships ​ $ 0.4 ​ $ 0.1 ​ $ (0.5) ​ $ — Other ​ 2.3 ​ — ​ (0.4) ​ 1.9 ​ ​ $ 2.7 ​ $ 0.1 ​ $ (0.9) ​ $ 1.9 ​ Amortization expense is included in depreciation and amortization expense in the accompanying consolidated statements of operations. Amortization expense for years ended December 31, 2021, 2020 and 2019 was $0.4 million, $0.9 million and $1.8 million, respectively. Scheduled amortization of the Company’s intangible assets as of December 31, 2021 for the next five years is as follows (in millions): ​ ​ ​ ​ 2022 $ 0.4 2023 ​ 0.4 2024 ​ 0.3 2025 ​ 0.2 2026 ​ 0.2 Thereafter ​ 0.2 ​ ​ $ 1.7 ​

Accrued Liabilities and Other

Accrued Liabilities and Other	12 Months Ended
	Dec. 31, 2021
Accrued Liabilities and Other
Accrued Liabilities and Other	9. Accrued Liabilities and Other Accrued liabilities and other consist of the following: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ December 31, ​ 2021 2020 ​ ​ (in millions) Property, income, sales and use taxes(1) ​ $ 132.7 ​ $ 5.6 Payroll and employee benefits ​ ​ 29.6 ​ ​ 28.0 Programming costs ​ ​ 19.3 ​ ​ 19.7 Customer cash collections (Transition Services Agreements) ​ ​ 17.5 ​ ​ — Other accrued liabilities ​ 9.5 ​ 8.2 Franchise and revenue sharing fees ​ 7.9 ​ 7.1 Utility pole costs ​ 2.2 ​ 1.7 Interest rate swaps ​ ​ — ​ ​ 9.4 ​ ​ $ 218.7 ​ $ 79.7 (1) Includes the current income tax payable associated with the sale of the Chicago, Illinois, Evansville, Indiana, and Baltimore, Maryland markets. ​

Long-Term Debt and Finance Leas

Long-Term Debt and Finance Leases	12 Months Ended
	Dec. 31, 2021
Long-Term Debt and Finance Leases
Long Term Debt and Finance Leases	10. Long-Term Debt and Finance Lease Obligations The following table summarizes the Company’s long-term debt and finance lease obligations: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ ​ December 31, 2021 ​ 2020 ​ Available ​ ​ ​ ​ ​ borrowing ​ Effective ​ ​ Outstanding ​ Outstanding ​ ​ capacity ​ interest rate(1) ​ balance balance ​ ​ (in millions) Long-term debt: ​ ​ ​ ​ Term B Loans, net(2) ​ $ — 3.50 % ​ $ 724.2 ​ $ 2,199.9 Revolving Credit Facility ​ 250.0 0.00 % ​ — ​ 38.0 Total long-term debt ​ $ 250.0 ​ ​ ​ 724.2 ​ 2,237.9 Other Financing ​ ​ ​ ​ ​ ​ ​ ​ 0.4 ​ ​ 0.8 Finance lease obligations ​ ​ ​ 22.3 ​ 32.9 Total long-term debt, finance lease obligations and other ​ ​ ​ 746.9 ​ 2,271.6 Debt issuance costs, net(3) ​ ​ ​ (5.5) ​ (5.6) Sub-total ​ ​ ​ 741.4 ​ 2,266.0 Less current portion ​ ​ ​ (17.9) ​ (37.5) Long-term portion ​ ​ ​ ​ $ 723.5 ​ $ 2,228.5 (1) Represents the effective interest rate in effect for all borrowings outstanding as of the year ended December 31, 2021 pursuant to each debt instrument including the applicable margin. (2) At December 31, 2021 and 2020 includes $5.8 million and $6.1 million of net unamortized discounts, respectively. (3) At December 31, 2021 and 2020 debt issuance costs include $4.1 million and $4.4 million related to Term B Loans and $1.4 million and $1.2 million related to the Revolving Credit Facility, respectively. ​ Refinancing of the Term B Loans and Revolving Credit Facility ​ On December 20, 2021, the Company entered into a new secured credit agreement with Morgan Stanley Senior Funding, Inc., as administrative agent, collateral agent and issuing bank (the “Credit Agreement”). The Credit Agreement consists of (i) a new Term Loan B in an aggregate principal amount of $730.0 million and (ii) a $250.0 million revolving credit commitment. The Term Loan B matures in December 2028 and bears interest at a rate equal to the Secured Overnight Financing Rate (“SOFR”) plus 3.00%, subject to a 50 basis point floor, and the revolving credit commitment bears interest at a rate equal to SOFR plus 2.75%, subject to a 50 basis point commitment fee rate for unused commitments, and matures in December 2026. The Senior Secured Term B loans and Revolving Credit Facility are secured on a first-priority basis by a lien on substantially all of the Company’s assets, subject to certain exceptions and permitted liens. ​ The Credit Agreement contains certain (a) restrictive covenants, including, but not limited to, restrictions on the entry into burdensome agreements, the prohibition of the incurrence of certain indebtedness secured by liens, restrictions on the ability to make certain payments and to enter into certain merger, consolidation, asset sale and affiliate transactions, and (b) financial maintenance covenants, including, but not limited to, a maximum leverage ratio, a minimum fixed charge ratio and a maximum secured indebtedness ratio. The Credit Agreement also contains representations and warranties, affirmative covenants and events of default customary for an agreement of its type. ​ The Credit Agreement allows for the issuance of letters of credit. The aggregate amount of undrawn letters of credit cannot exceed $20.0 million and are used in the ordinary course of business and released when the respective contractual obligations have been fulfilled by the Company. The outstanding amount of cash collateralized letters of credit was $5.3 million as of December 31, 2021. ​ On the date of re-financing, the Company repaid the unpaid principal balance of its Term B loans under the previous eighth amendment (“Eighth Amendment”) to its previous credit agreement dated July 17, 2017, with JPMorgan Chase Bank, N.A., as the administrative agent and revolver agent. Under the Eighth Amendment, (i) the previous Term B loans matured on August 19, 2023 and bore interest, at the Company’s option, at a rate equal to ABR plus 2.25% or LIBOR plus 3.25%, and (ii) the borrowings under the revolving credit facility matured on May 31, 2022 and bore interest, at the Company's option, at a rate equal to ABR plus 2.00% or LIBOR plus 3.00%. ​ As a result of the re-financing, the Company recorded a $3.2 million loss on early extinguishment of debt related to the write-off of unamortized debt issuance and third-party costs. As of December 31, 2021, the Company was in compliance with all debt covenants. ​ Amortization of debt issuance costs and debt discount, all of which are included in interest expense in the accompanying consolidated statements of operations, for the years ended December 31, 2021, 2020 and 2019 are as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ 2021 2020 2019 ​ ​ (in millions) Amortization of deferred issuance costs ​ $ 2.4 ​ $ 2.4 ​ $ 2.4 Amortization of debt discount ​ 2.3 ​ 2.3 ​ 2.3 ​ Principal maturities of our long-term debt, excluding finance lease obligations, as of December 31, 2021 are as follows: ​ ​ ​ ​ ​ Long-term Debt ​ ​ (in millions) 2022 ​ $ 7.3 2023 ​ 7.3 2024 ​ 7.3 2025 ​ ​ 7.3 2026 ​ ​ 7.3 Thereafter ​ 693.5 ​ ​ $ 730.0 ​

Derivative Instruments and Hedg

Derivative Instruments and Hedging Activities	12 Months Ended
	Dec. 31, 2021
Derivative Instruments and Hedging Activities
Derivative Instruments and Hedging Activities	11. Derivative Instruments and Hedging Activities The Company is exposed to certain risks during the normal course of its business arising from adverse changes in interest rates. The Company selectively uses derivative financial instruments (“derivatives”), including interest rate swaps, to manage interest rate risk. The Company does not hold or issue derivative instruments for speculative purposes. Fluctuations in interest rates can be volatile, and the Company’s risk management activities do not totally eliminate these risks. Consequently, these fluctuations could have a significant effect on the Company’s financial results. ​ The Company’s exposure to interest rate risk results primarily from its variable rate borrowings. On May 9, 2018, the Company entered into variable to fixed interest rate swap agreements for a notional amount of $1,361.2 million to hedge a portion of the outstanding principal balance of its variable rate term loan debt. The Company’s outstanding derivatives had a notional amount of $1,323.5 million and the fair value was presented within accrued liabilities and other of $9.4 million within the consolidated balance sheet as of December 31, 2020. The Company did not have such amounts as of December 31, 2021 as the interest rate swap contracts expired in May of 2021. ​ Gains (losses) on derivatives designated as cash flow hedges included in the consolidated statements of comprehensive income (loss) for the years ended December 31, 2021 and 2020 are shown in the table below. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Year ended ​ ​ December 31, ​ 2021 2020 Interest rate swap contracts(1) ​ (in millions) Gain recorded in AOCL on derivatives, before tax ​ $ 8.5 ​ $ 11.8 Tax impact ​ ​ (2.0) ​ ​ (2.8) Gain recorded in AOCL on derivatives, net ​ ​ 6.5 ​ ​ 9.0 (1) Gains (losses) on derivatives reclassified from AOCL into income will be included in “Interest expense” in the consolidated statements of operations, the same income statement line item as the earnings effect of the hedged item. Losses recognized in the consolidated statements of operations for the year ended December 31, 2021, 2020 and 2019 total $9.5 million, $21.2 million and $6.2 million, respectively. ​ For the periods presented, all cash flows associated with derivatives are classified as operating cash flows in the consolidated statements of cash flows.

Fair Value Measurements

Fair Value Measurements	12 Months Ended
	Dec. 31, 2021
Fair Value Measurements
Fair Value Measurements	12. Fair Value Measurements The fair values of cash and cash equivalents, receivables and trade payables approximate their carrying values due to the short-term nature of these instruments. For assets and liabilities of a long-term nature, the Company determines fair value based on the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants. Market or observable inputs are the preferred source of values, followed by unobservable inputs or assumptions based on hypothetical transactions in the absence of market inputs. The Company applies the following hierarchy in determining fair value: ● Level 1, defined as observable inputs being quoted prices in active markets for identical assets; ● Level 2, defined as observable inputs other than quoted prices included in Level 1, including quoted prices for similar assets and liabilities in active markets; quoted prices for identical or similar instruments in markets that are not active; and model-derived valuations in which significant inputs and significant value drivers are observable in active markets; and ● Level 3, defined as values determined using models that utilize significant unobservable inputs for which little or no market data exists, discounted cash flow methodologies or similar techniques, or other determinations requiring significant management judgment or estimation. The Company’s derivative instrument expired in May 2021; however, prior to expiration the derivative instrument was accounted for at fair value on a recurring basis and classified within Level 2 ​ The estimated fair value of the Company’s long-term debt is based on dealer quotes considering current market rates for the Company’s credit facility and is classified as Level 2. The ratio of the Company’s aggregate debt balance has trended from quoted market prices in active markets to quoted prices in non-active markets. The fair value of the Company’s long-term debt was valued at $729.1 million and $2,203.1 million as of December 31, 2021 and 2020, respectively. Long-term debt fair value does not include debt issuance costs and discounts. There were no transfers into or out of Level 1, 2 or 3 during the years ended December 31, 2021 and 2020. ​ The Company’s nonfinancial assets such as franchises, property, plant, and equipment, and other intangible assets are not measured at fair value on a recurring basis; however, they are subject to fair value adjustments in certain circumstances, such as when there is evidence that an impairment may exist. When such impairments are recorded, fair values are generally classified within Level 3 of the valuation hierarchy.

Stock-Based Compensation

Stock-Based Compensation	12 Months Ended
	Dec. 31, 2021
Stock-Based Compensation
Stock-Based Compensation	13. Stock-based Compensation The Company’s stock incentive plan, the 2017 Omnibus Incentive Plan, provides for grants of stock options, restricted stock and performance awards. The Company’s directors, officers and other employees and persons who engage in services for the Company are eligible for grants under the plan. The stock incentive plan has authorized 12,074,128 shares of the Company’s common stock to be available for issuance, subject to adjustment in the event of a reorganization, stock split, merger or similar change in the Company’s corporate structure or the outstanding shares of common stock. Restricted stock awards generally vest ratably over a four year period based on the date of grant. For restricted stock awards that contain only service conditions for vesting, the Company calculates the award fair value based on the closing stock price on the accounting grant date. Certain awards were modified during the year ended December 31, 2021 and are classified as liabilities. The non-cash compensation expense associated with these awards was $0.6 million for the year ended December 31, 2021. For the years ended December 31, 2021, 2020 and 2019 the Company recorded $15.3 million, $11.1 million and $10.1 million of non-cash compensation expense, respectively. The non-cash compensation expense is reflected in selling, general and administrative expense and operating expenses (excluding depreciation and amortization), depending on the recipients’ duties, in the Company’s consolidated statements of operations. Total unrecognized non-cash compensation expense as of December 31, 2021 was $31.9 million and is expected to be recognized over a weighted-average period of 2.2 years. The following table summarizes the restricted stock award activity for the years ended December 31, 2021, 2020 and 2019. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Year ended December 31, ​ ​ 2021 ​ 2020 2019 ​ ​ ​ ​ ​ Weighted Average ​ ​ ​ ​ Weighted Average ​ ​ ​ ​ Weighted Average ​ ​ Shares ​ ​ Grant Price ​ Shares ​ ​ Grant Price ​ Shares ​ ​ Grant Price Outstanding, beginning of period 4,990,971 ​ $ 5.71 ​ 3,140,168 ​ $ 8.56 ​ 2,356,418 ​ $ 9.23 Granted 1,422,358 ​ ​ 17.17 3,585,929 ​ ​ 4.44 ​ 2,075,455 ​ ​ 8.41 Vested ​ (1,704,596) ​ 6.23 (1,154,151) ​ 8.87 ​ (825,764) ​ 9.84 Forfeited (383,609) ​ 7.71 ​ (580,975) ​ 7.05 ​ (465,941) ​ 9.01 Outstanding, end of period(1) 4,325,124 ​ $ 9.10 4,990,971 ​ $ 5.71 ​ 3,140,168 ​ $ 8.56 (1) The total outstanding non-vested shares of restricted stock awards granted to employees and directors are included in total outstanding shares as of December 31, 2021, 2020 and 2019. Generally, the Company withholds shares to cover the income tax withholding of the employee upon vesting. These shares are reflected as treasury stock in the Company’s consolidated balance sheets. The total fair value of restricted shares vested was $28.9 million, $5.0 million, and $6.9 million for the years ended December 31, 2021, 2020 and 2019, respectively. Nonvested Performance Shares ​ On March 3, 2021, the Company granted 209,621 performance shares which will vest based on the Company’s achievement level relative to the following performance measures at December 31, 2023: 50% based upon the Company’s Total Shareholder Return (“TSR”) relative to the TSRs of the Company’s peer group and 50% based on the Company’s three-year cumulative EBITDA metric. EBITDA is defined as net income (loss) before net interest expense, income taxes, depreciation and amortization (including impairments), impairment losses on intangibles and goodwill, the write-off of any asset, loss on early extinguishment of debt, integration and restructuring expenses and all non-cash charges and expenses (including stock compensation expense) and certain other income and expenses. Upon achievement of the minimum threshold performance metric, the grantee may earn 50% to 200% of their respective target shares based on the performance goal. ​ The performance shares based on relative TSR performance have a market condition and are valued using a Monte Carlo simulation model on the grant date, which resulted in a grant date fair value of $27.76 per share. The estimated fair value is amortized to expense over the requisite service period, which ends on December 31, 2023. The following assumptions were used in the Monte Carlo simulation for computing the grant date fair value of the performance shares with a market condition: risk-free interest rate of 0.26%, volatility factors in the expected market price of the Company's common shares of 59.77% and an expected life of three years. ​ The performance shares based on three-year cumulative EBITDA have a performance condition. The probability of achieving the performance condition is assessed at each reporting period. If it is deemed probable that the performance condition will be met, compensation cost will be recognized based on the closing price per share of the Company's common stock on the date of the grant multiplied by the number of awards expected to be earned. If it is deemed that it is not probable that the performance condition will be met, the Company will discontinue the recognition of compensation cost and any compensation cost previously recorded will be reversed. ​ The Company determined that it was not probable that the performance condition based on three-year cumulative EBITDA would be met for the performance shares issued in 2020 and 2021. The Company came to this conclusion based on the sale of five service areas in 2021. See Note 5 – Asset Sales for additional information regarding the sales. As a result of this conclusion, the Company reversed approximately $1.0 million of previously recognized stock compensation expense in the fourth quarter of 2021.

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2021
Income Taxes
Income Taxes	14. Income Taxes The Company accounts for income taxes under the asset and liability method. Under this method, deferred tax assets and liabilities are determined based on the difference between the financial statement and tax basis of assets and liabilities using enacted tax rates in effect for the year in which the difference is expected to reverse. Additionally, the impact on deferred tax assets and liabilities of changes in tax rates is reflected in the financial statements in the period that includes the date of enactment. Income Tax Benefit ​ For the years ended December 31, 2021, 2020, and 2019, the Company recorded income tax benefit from continuing operations as shown below. The tax provision in future periods will vary based on current and future temporary differences, as well as future operating results. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Year ended December 31, ​ 2021 2020 2019 ​ (in millions) Current tax (expense) benefit ​ ​ ​ ​ ​ ​ ​ ​ ​ Federal ​ $ — ​ $ — ​ $ — State ​ (1.6) ​ (1.9) ​ 3.1 Total current tax ​ (1.6) ​ (1.9) ​ 3.1 Deferred tax (expense) benefit ​ ​ ​ ​ ​ ​ ​ ​ ​ Federal ​ 22.2 ​ 34.2 ​ 25.5 State ​ (6.8) ​ (1.7) ​ 5.3 Total deferred tax ​ 15.4 ​ 32.5 ​ 30.8 Income tax benefit ​ $ 13.8 ​ $ 30.6 ​ $ 33.9 ​ The Company reported total income tax expense of $292.9 million, $7.8 million and $1.5 million during the years ended December 31, 2021, 2020 and 2019, respectively. As a result of the Coronavirus Aid, Relief and Economic Security (“CARES”) Act enacted on March 27, 2020, companies were able to request refunds of the remaining amount of refundable Alternate Minimum Tax carryforwards. Previously, the remaining amount would have been refunded between 2020 and 2021. The Company received a full refund of approximately $4.4 million during the second quarter of 2020. The CARES Act contains many other tax provisions, all of which have no material impact to the financial statements. ​ The provision for income taxes incurred is different from the amount calculated by applying the applicable federal income tax rate to the income from continuing operations before income tax benefit. The significant items causing these differences are as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Year ended December 31, ​ 2021 2020 2019 ​ ​ (in millions) Statutory federal income taxes ​ $ 17.3 ​ $ 29.2 ​ $ 24.5 State income taxes ​ 0.6 ​ 4.8 ​ 0.8 Tax status & tax rate change ​ 0.1 ​ 0.8 ​ 0.9 Other true-ups ​ ​ 0.3 ​ ​ (2.5) ​ ​ 0.8 Equity compensation ​ ​ 3.8 ​ ​ (1.0) ​ ​ (0.3) Other permanent differences ​ (2.4) ​ (0.4) ​ (0.4) Goodwill impairment ​ ​ — ​ ​ — ​ ​ — Research and development tax credits ​ ​ 2.5 ​ ​ 2.2 ​ ​ — Uncertain tax positions ​ (0.1) ​ (0.2) ​ 3.7 Change in valuation allowance ​ (8.3) ​ (2.3) ​ 3.9 Income tax (expense) benefit, net ​ $ 13.8 ​ $ 30.6 ​ $ 33.9 ​ The $8.3 million change in valuation allowance as of December 31, 2021, is the result of changes in state deferred tax assets related to net operating loss carryforwards and state bonus depreciation modification. The $2.3 million change in valuation allowance as of December 31, 2020 is similarly related to the increases in state net operating loss carryforwards and state bonus modification deferred tax assets that are not more likely than not to be realized. ​ Deferred Income Taxes, Net ​ The tax effects of temporary differences that give rise to significant portions of the deferred tax assets and deferred tax liabilities at December 31, 2021 and 2020 are as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ 2021 2020 ​ (in millions) Deferred tax assets ​ ​ ​ ​ ​ ​ Allowances and other reserves ​ $ 2.2 ​ $ 6.3 Net operating loss carryforwards ​ 82.1 ​ 223.1 Research and development tax credits ​ ​ — ​ ​ 4.1 Interest hedging ​ ​ — ​ ​ 2.0 Other ​ 1.0 ​ 1.4 Total deferred tax assets ​ ​ 85.3 ​ ​ 236.9 Less: valuation allowance ​ (35.5) ​ (30.8) Deferred tax asset ​ $ 49.8 ​ $ 206.1 ​ ​ ​ ​ ​ ​ ​ Deferred tax liabilities ​ ​ ​ ​ ​ ​ Depreciation and amortization ​ $ (145.8) ​ $ (206.3) Franchise operating rights ​ (161.5) ​ (198.6) Debt issuance costs ​ ​ — ​ ​ (1.8) Total deferred tax liabilities ​ ​ (307.3) ​ ​ (406.7) Net deferred tax liabilities ​ $ (257.5) ​ $ (200.6) ​ Valuation Allowance In assessing the realizability of deferred tax assets, management considers whether it is more likely than not that some portion or all of the deferred tax assets will be realized. In evaluating the need for a valuation allowance, management takes into account various factors, including future reversals of existing taxable temporary differences, projected future taxable income, tax planning strategies, and results of recent operations. On the basis of this evaluation, a valuation allowance of $35.5 million and $30.8 million, as of December 31, 2021 and 2020, respectively, has been recorded to recognize only the portion of the deferred tax asset that is more likely than not to be realized. ​ Net Operating Loss and Credit Carryforwards ​ As of December 31, 2021, the Company had approximately $197.7 million of federal tax net operating loss carryforwards, which expire between the years 2026 through 2037. In addition, as of December 31, 2021, the Company had state tax net operating loss carryforwards of $897.3 million, of which $237.2 million are indefinite lived and $660.1 million expire between 2022 and 2039. As a result of the IPO (effective May 25, 2017), the Company experienced an “ownership change” as defined in Section 382 of the Internal Revenue Code resulting in limitations on the Company’s use of its existing federal and state net operating losses and capital losses. After December 31, 2021, $197.7 million of the Company’s federal tax loss carryforwards are subject to Section 382 and other restrictions. As of December 31, 2021, the Company had utilized the federal research and development carryforwards. ​ Uncertain Tax Positions ​ These uncertain tax positions, if ever recognized in the financial statements, would be recorded in the consolidated statements of operations as part of the income tax provision. A reconciliation of the beginning and ending amount of unrecognized tax benefits, exclusive of interest and penalties, included in other non-current liabilities on the accompanying consolidated balance sheets of the Company is as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Year ended December 31, ​ 2021 2020 2019 ​ ​ (in millions) Unrecognized tax benefits—January 1st ​ $ 13.7 ​ $ 11.4 ​ $ 28.0 Gross increases—tax positions in prior period ​ — ​ 0.7 ​ — Gross decreases—tax positions in prior period ​ (0.7) ​ — ​ (12.8) Gross increases—tax positions in current period ​ 1.2 ​ 1.6 ​ — Settlements ​ — ​ — ​ (3.8) Unrecognized tax benefits—December 31st ​ $ 14.2 ​ $ 13.7 ​ $ 11.4 ​ As of December 31, 2021, the Company recorded gross unrecognized tax benefits of $14.2 million, all of which, if recognized, would affect the Company’s effective tax rate. The Company recognizes interest and penalties accrued on uncertain income tax positions as part of the income tax provision. Interest and penalties included in other long-term liabilities on the accompanying consolidated balance sheets of the Company were $1.4 million, $1.2 million, and $1.0 million for years ended December 31, 2021, 2020 and 2019, respectively. The Company expects $2.7 million of unrecognized tax benefits and $1.4 million of interest could reverse in the next 12 months. The Company files income tax returns in the U.S. federal jurisdiction and various state jurisdictions. No tax years for the Company are currently under examination by the IRS or state and local tax authorities for income tax purposes. Generally, the Company’s 2018 through 2021 tax years remain open for examination and assessment. Years prior to 2018 remain open solely for purposes of examination of the Company’s loss and credit carryforwards. The Company is not currently under examination, but does have open tax controversy matters with state taxing authorities. Activity related to state and local controversy matters did not have a material impact on our consolidated financial position or results of operations during the year ended December 31, 2021, nor do we anticipate a material impact in the future.

Earnings (Loss) per Common Shar

Earnings (Loss) per Common Share	12 Months Ended
	Dec. 31, 2021
Earnings (Loss) per Common Share
Earnings (Loss) per Common Share	15. Earnings (Loss) per Common Share ​ Basic earnings or loss per share attributable to the Company’s common stockholders is computed by dividing net earnings or loss attributable to common stockholders by the weighted average number of common shares outstanding for the period. Diluted earnings or loss per share attributable to common stockholders presents the dilutive effect, if any, on a per share basis of potential common shares (such as restricted stock units) as if they had been vested or converted during the periods presented. No such items were included in the computation of diluted loss or earnings per share for the periods presented because the Company incurred a net loss from continuing operations and the effect of inclusion would have been anti-dilutive. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Year ended ​ ​ December 31, ​ 2021 2020 2019 ​ ​ (in millions, except share data) Loss from continuing operations ​ $ (68.6) ​ $ (108.3) ​ $ (82.4) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Income from discontinued operations ​ $ 839.1 ​ $ 122.7 ​ $ 118.8 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Net income ​ $ 770.5 ​ $ 14.4 ​ $ 36.4 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Basic weighted-average shares ​ 82,720,934 ​ 81,561,707 ​ 80,713,926 Effect of dilutive securities: ​ ​ ​ ​ ​ ​ Restricted stock awards ​ — ​ — ​ — Diluted weighted-average shares ​ 82,720,934 ​ 81,561,707 ​ 80,713,926 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Basic and diluted (loss) per ​ ​ ​ ​ ​ ​ ​ ​ ​ Basic ​ $ (0.83) ​ $ (1.33) ​ $ (1.02) Diluted ​ $ (0.83) ​ $ (1.33) ​ $ (1.02) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Basic and diluted earnings per ​ ​ ​ ​ ​ ​ ​ ​ ​ Basic ​ $ 10.14 ​ $ 1.51 ​ $ 1.47 Diluted ​ $ 10.14 ​ $ 1.51 ​ $ 1.47 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Basic and diluted earnings per common share ​ ​ ​ ​ ​ ​ ​ ​ ​ Basic ​ $ 9.31 ​ $ 0.18 ​ $ 0.45 Diluted ​ $ 9.31 ​ $ 0.18 ​ $ 0.45 ​

Employee Benefits 10K

Employee Benefits 10K	12 Months Ended
	Dec. 31, 2021
Employee Benefits
Employee Benefits	16. Employee Benefits 401(k) Savings Plan The Company adopted a defined contribution retirement plan which complies with Section 401(k) of the Internal Revenue Code. Substantially all employees are eligible to participate in the plan. The Company matches 100% of the participant’s voluntary contributions up to 3% and 50% of the next 2% subject to a limit of the first 4% of the participant’s compensation. Company matching contributions vest 25% annually over a four-year period. During the years ended December 31, 2021, 2020 and 2019, the Company recorded $3.2 million, $3.0 million and $3.2 million, respectively, of expense related to the Company’s matching contributions to the 401(k) plan. ​ ​ Deferred Compensation Plan In July 2007, the Company implemented a deferred compensation plan. Under this plan, certain members of management and other highly compensated employees may elect to defer a portion of their annual compensation, subject to certain percentage limitations. The assets and liabilities of the plan are included within the Company’s financial statements. The assets of the plan are specifically designated as available to the Company solely for the purpose of paying benefits under the Company’s deferred compensation plan. However, in the event the Company became insolvent, the investments would be available to all unsecured general creditors. The deferred compensation liability relates to obligations due to participants under the plan. The assets from the participant deferrals are invested by the Company, through a life insurance investment vehicle, in mutual funds and money market funds. The deferred compensation liability represents accumulated net participant deferrals and earnings thereon based on participant investment elections. The assets and liabilities are recorded at fair value, and any adjustments to the fair value are recorded in the consolidated statements of operations. The assets and liabilities of the plan are included in the accompanying consolidated balance sheets as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ 2021 2020 ​ ​ (in millions) Prepaid expenses and other (current assets) ​ $ 1.9 ​ $ 1.7 Accrued liabilities and other (current liabilities) ​ $ 1.9 ​ $ 1.7 ​

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2021
Commitments and Contingencies
Commitments and Contingencies	17. Commitments and Contingencies The following items are not included as contractual obligations due to the various factors discussed below. However, the Company incurs these costs as part of its operations: ● The Company rents utility poles used in its operations. Generally, pole rentals are cancellable on short notice, but the Company anticipates that such rentals will recur. Rent expense for pole rental attachments was $6.1 million, $5.2 million and $5.1 million for the years ended December 31, 2021, 2020 and 2019, respectively. ● The Company pays franchise fees under multi-year franchise agreements based on a percentage of revenues generated from video service per year. Franchise fees and other franchise-related costs included in the accompanying statements of operations were $11.8 million, $13.5 million and $14.3 million for the years ended December 31, 2021, 2020 and 2019, respectively. Programming Contracts In the normal course of business, the Company enters into numerous contracts to license programming content for which the payment obligations are fully contingent on the number of subscribers to whom it provides the content. These contracts typically have annual rate increases and term lengths of three Legal and Other Contingencies IPO Shareholder Class Action Kirkland. et al. v. WideOpenWest, Inc., et al. Kirkland Kirkland ​ Sprint Patent Infringement Claim ​ The Company is party to various legal proceedings (including individual, class and putative class actions) arising in the normal course of its business covering a wide range of matters and types of claims including, but not limited to, general contracts, billing disputes, rights of access, programming, taxes, fees and surcharges, consumer protection, trademark and patent infringement, employment, regulatory, tort, claims of competitors and disputes with other carriers. ​ In accordance with GAAP, the Company accrues an expense for pending litigation when it determines that an unfavorable outcome is probable and the amount of the loss can be reasonably estimated. Legal defense costs are expensed as incurred. None of the Company’s existing accruals for pending matters are material. The Company consistently monitors its pending litigation for the purpose of adjusting its accruals and revising its disclosures accordingly, in accordance with GAAP, when required. However, litigation is subject to uncertainty, and the outcome of any particular matter is not predictable. The Company will vigorously defend its interests in pending litigation, and the Company believes that the ultimate resolution of all such matters, after considering insurance coverage or other indemnities to which it is entitled, will not have a material adverse effect on its consolidated financial position, results of operations, or cash flows.

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2021
Summary of Significant Accounting Policies
Principles of Consolidation	Principles of Consolidation The accompanying consolidated financial statements of WOW reflect all transactions of WideOpenWest, Inc. and its wholly owned subsidiaries. All significant intercompany accounts and transactions have been eliminated in consolidation. ​
Cash and Cash Equivalents	Cash and Cash Equivalents Cash equivalents represent short-term investments consisting of money market funds that are carried at cost, which approximates fair value. The Company considers all short-term investments with an original maturity of three months or less at the date of purchase to be cash equivalents.
Provision for Doubtful Accounts	Provision for Doubtful Accounts The provision for doubtful accounts and the allowance for doubtful accounts are based on historical trends. The Company’s policy to reserve for potential bad debts is based on the aging of the individual receivables. The Company manages credit risk by disconnecting services to customers who are delinquent, generally after 100 days of delinquency. The individual receivables are written-off after all reasonable efforts to collect the funds have been made. Actual write-offs may differ from the amounts reserved. See Note 3 – Revenue from Contracts with Customers for a discussion of changes in the allowance for doubtful accounts for the periods presented.
Prepaid Expenses and Other	Prepaid Expenses and Other Prepaid expenses and other primarily consists of short-term deferred contract costs and prepaid software and insurance costs. Prepayments are recognized as operating expenses or selling, general, and administrative expense over the life of the underlying agreements.
Property, Plant and Equipment	Property, Plant and Equipment Property, plant and equipment are stated at cost less accumulated depreciation and amortization and primarily represent costs associated with the construction of cable transmission and distribution facilities and new service installations at the customer location. Capitalized costs include materials, labor, and certain indirect costs attributable to the capitalization activity. Maintenance and repairs are expensed as incurred. Upon sale or retirement of an asset, the cost and related depreciation and amortization are removed from the related accounts and resulting gains or losses are reflected in operating results. The Company makes judgments regarding the installation and construction activities to be capitalized. The Company capitalizes direct labor associated with capitalizable activities and indirect costs using standards developed from operational data, including the proportionate time to perform a new installation relative to the total installation activities and an evaluation of the nature of the indirect costs incurred to support capitalizable activities. Judgment is required to determine the extent to which indirect costs incurred are related to capitalizable activities. Indirect costs include (i) employee benefits and payroll taxes associated with capitalized direct labor, (ii) direct variable costs of installation and construction, (iii) the direct variable costs of support personnel directly involved in assisting with installation activities, such as dispatchers and (iv) other indirect costs directly attributable to capitalizable activities. Property, plant and equipment are depreciated over the estimated useful life upon being placed into service. Depreciation of property, plant and equipment is calculated on a straight-line basis, over the following estimated useful lives: ​ ​ ​ ​ ​ ​ ​ Estimated Useful Asset Category Lives (Years) Office and technical equipment 3 - 10 ​ Computer equipment and software 3 ​ Customer premise equipment 5 ​ Vehicles 5 ​ Telephony infrastructure ​ 5 - 7 ​ Headend equipment 7 ​ Distribution facilities 10 ​ Building and leasehold improvements 5 - 20 ​ ​ Leasehold improvements are depreciated over the shorter of the estimated useful lives or lease terms.
Intangible Assets and Goodwill	Intangible Assets and Goodwill Intangible assets consist primarily of acquired franchise operating rights and goodwill. Franchise operating rights represent the value attributable to agreements with local franchising authorities, which allow access to homes in the public right of way. The Company’s franchise operating rights were acquired through business combinations. The Company does not amortize franchise operating rights as it has been determined that they have an indefinite life. Costs incurred in negotiating and renewing franchise operating agreements are expensed as incurred. Franchise related customer relationships represent the value to the Company of the benefit of acquiring the existing cable subscriber base and are amortized over the estimated life of the subscriber base (four years) on a straight-line basis, which is shorter than the economic useful life, which approximates an accelerated method. Goodwill represents the excess purchase price over the fair value of the identifiable net assets acquired in business combinations.
Asset Impairments	Asset Impairments Significant judgment by management is required to determine estimates and assumptions used in the valuation of property, plant and equipment, intangible assets and goodwill. Long-lived Assets The Company evaluates the recoverability of its long-lived assets whenever events or substantive changes in circumstances indicate that the carrying amount may not be recoverable. The evaluation is based on the undiscounted cash flows generated by the underlying asset groups, including estimated future operating results, trends or other determinants of fair value. If the total of the expected future undiscounted cash flows was determined to be less than the carrying amount of the asset group, the Company would recognize an impairment charge to the extent the carrying amount of the asset group exceeds its estimated fair value. The Company had no triggering events or impairment of its long-lived assets in any of the periods presented. Franchise Operating Rights The Company evaluates the recoverability of its franchise operating rights at least annually on October 1, or more frequently whenever events or substantive changes in circumstances indicate that the assets might be impaired. The Company evaluates the franchise operating rights for impairment by comparing the carrying value of the intangible asset to its estimated fair value utilizing both quantitative and qualitative methods. Any excess of the carrying value over the fair value would be expensed as an impairment loss. The Company calculates the fair value of franchise operating rights using the multi-period excess earnings method, an income approach, which calculates the value of an intangible asset by discounting its future cash flows. The fair value is determined based on estimated discrete discounted future cash flows attributable to each franchise operating right intangible asset using assumptions consistent with internal forecasts. Assumptions key in estimating fair value under this method include, but are not limited to, revenue and subscriber growth rates (less anticipated customer churn), operating expenditures, capital expenditures (including any build out), market share achieved, contributory asset charge rates, tax rates and discount rate. The discount rate used in the model represents a weighted average cost of capital and the perceived risk associated with an intangible asset such as franchise operating rights. See Note 7 – Franchise Operating Rights & Goodwill for discussion of impairment charges recognized for the periods presented. Goodwill The Company assesses the recoverability of its goodwill at least annually on October 1, or more frequently whenever events or substantive changes in circumstances indicate that the asset might be impaired. The Company may first choose to assess qualitative factors to determine whether it is more likely than not that the fair value of a reporting unit is less than its carrying amount, including goodwill. If the Company determines that it is more likely than not that the fair value of a reporting unit is less than its carrying amount, then the Company performs a quantitative analysis. The Company may also choose to by-pass the qualitative assessment and proceed directly to the quantitative analysis. In the quantitative analysis, the Company utilizes a discounted cash flow analysis or a market approach to estimate the fair value of goodwill and compares such value to the carrying amount. Any excess of the carrying value of goodwill over the estimated fair value of goodwill would be expensed as an impairment loss. The Company determined it had one reporting unit as part of its annual goodwill analysis on October 1. See Note 7 – Franchise Operating Rights & Goodwill for a discussion of impairment charges recognized for the periods presented.
Other Noncurrent Assets	Other Noncurrent Assets Other noncurrent assets are comprised primarily of long-term deferred contract costs and long-term software costs. These amounts are recognized as operating expenses or selling, general, and administrative expense over the period of usage.
Fair Value of Financial Instruments	Fair Value of Financial Instruments Carrying amounts reported in the consolidated balance sheets for cash and cash equivalents are carried at fair value. The carrying amounts reported in the consolidated balance sheets for accounts receivable and accounts payable approximate fair value due to their short-term maturities. The fair value of long-term debt is based on the debt’s variable rate of interest and the Company’s own credit risk and risk of nonperformance, as required by GAAP. Certain financial instruments potentially subject the Company to concentrations of credit risk. These financial instruments consist primarily of trade receivables and cash and cash equivalents. The Company places its cash and cash equivalents with high credit quality financial institutions. The Company does not enter into master netting arrangements. The Company periodically assesses the creditworthiness of the institutions with which it invests. The Company does, however, maintain invested balances in excess of federally insured limits; however, the Company has never experienced any losses related to these balances.
Debt Issuance Costs	Debt Issuance Costs Debt issuance costs incurred by the Company are capitalized and amortized over the life of the related debt using the effective interest rate method and are included as a reduction in long-term debt in the accompanying consolidated balance sheets. The amortization of debt issuance costs is included in interest expense on the accompanying consolidated statements of operations.
Asset Retirement Obligations	Asset Retirement Obligations The Company accounts for its asset retirement obligations by recognizing a liability for the fair value of a conditional asset retirement obligation when incurred if the fair value of the liability can be reasonably estimated. Certain of the Company’s franchise agreements and leases contain provisions requiring the Company to restore facilities or remove equipment upon the maturity of the franchise or lease agreement. The Company expects to continually renew its franchise agreements. Accordingly, the Company has determined a remote possibility that the Company would be required to incur significant restoration or removal costs related to these franchise agreements in the foreseeable future. An estimated liability, which could be significant, would be recorded in the unlikely event a franchise agreement containing such a provision were no longer expected to be renewed. An estimate of the obligations related to the removal provisions contained in the Company’s lease agreements has been made and recorded in other non-current liabilities in the consolidated balance sheet; however, the amount is not material.
Revenue Recognition	Revenue Recognition Residential and business subscription services revenue consists primarily of monthly recurring charges for HSD, Video, and Telephony services, including charges for equipment rentals and other regulatory fees, and non-recurring charges for optional services, such as pay-per-view, video-on-demand, and other events provided to the customer. Monthly charges for residential and business subscription services are billed in advance and recognized as revenue over the period of time the associated services are provided to the customer. Charges for optional services are generally billed in arrears and revenues are recognized at the point in time when the services are provided to the customer. Residential and business customers may be charged non-recurring upfront fees associated with installation and other administrative activities. Charges for upfront fees associated with installation and other administrative activities are initially recorded as unearned service revenue and recognized as revenue over the expected period of benefit for residential customers and over the contract term for business customers. The Company is required to pay certain cable franchising authorities an amount based on the percentage of gross revenue derived from Video services. The Company generally passes these fees and other similar regulatory and ancillary fees on to the customer. Revenues from regulatory and other ancillary fees passed on to the customer are reported with the associated service revenue and the corresponding costs are reported as an operating expense. ​ The Company’s trade receivables are subject to credit risk, as customer deposits are generally not required. The Company’s credit risk is limited due to the large number of customers, individually small balances and short payment terms. The Company manages credit risk by screening applicants through the use of internal customer information, identification verification tools and credit bureau data. If a customer account is delinquent, various measures are used to collect amounts owed, including termination of the customer’s service.
Costs and Expenses	Costs and Expenses The Company’s expenses consist of operating, selling, general and administrative expenses, depreciation and amortization expense and interest expense. Business interruption insurance proceeds are recorded to operating expense in the statements of operations.
Programming Costs	Programming Costs Programming is acquired for distribution to subscribers, generally pursuant to multi-year license agreements, with rates typically based on the number of subscribers that receive the programming. These programming costs are included in operating expenses in the month the programming is distributed.
Advertising Costs	Advertising Costs The cost of advertising is expensed as incurred and is included in selling, general and administrative expenses in the accompanying consolidated statements of operations. Advertising expense during the years ended December 31, 2021, 2020 and 2019 was $39.5 million, $38.0 million and $32.3 million, respectively.
Income Taxes	Income Taxes The Company accounts for income taxes under the asset and liability method. Under this method, deferred tax liabilities and assets are determined based on the difference between the financial statement and tax basis of assets and liabilities using enacted tax rates in effect for the year in which the difference is expected to reverse. Additionally, the impact of changes in the tax rates and laws on deferred taxes, if any, is reflected in the financial statements in the period of enactment. Valuation allowances are established to reduce deferred tax assets to the amount that will more likely than not be realized. To the extent that a determination was made to establish or adjust a valuation allowance, the expense or benefit is recorded in the period in which the determination is made. ​ From time to time, the Company engages in transactions in which the tax consequences may be subject to uncertainty. Significant judgment is required in assessing and estimating the tax consequences of these transactions. The Company prepares and files tax returns based on its interpretation of tax laws and regulations. In the normal course of business, the tax returns are subject to examination by various taxing authorities. Such examinations may result in future tax, interest and penalty assessments by these taxing authorities. In determining the Company’s income tax provision for financial reporting purposes, the Company establishes a reserve for uncertain income tax positions unless such positions are determined to be more likely than not of being sustained upon examination, based on their technical merits. That is, for financial reporting purposes, the Company only recognizes tax benefits taken on the tax return that the Company believes are more likely than not of being sustained upon examination. There is considerable judgment involved in determining whether positions taken on the tax return are more likely than not of being sustained. The Company adjusts its tax reserve estimates periodically because of ongoing examinations by, and settlements with, the various taxing authorities, as well as changes in tax laws, regulations and interpretations. The consolidated income tax provision of any given year includes adjustments to prior year income tax accruals that are considered appropriate and any related estimated interest and penalties. The Company’s policy is to recognize, when applicable, interest and penalties on uncertain income tax positions as part of income tax provision.
Derivative Financial Instruments	Derivative Financial Instruments The Company may use derivative financial instruments to manage its exposure to fluctuations in interest rates by entering into interest rate exchange agreements such as interest rate swaps. All derivatives, whether designated as a hedge or not, are required to be recorded on the consolidated balance sheet at fair value. If the derivative is designated as a hedge and is highly effective as a hedging instrument, recognition of changes in fair value depend on whether the derivative is used in a fair value hedge, in which changes are recognized in earnings, or cash flow hedge, in which changes are recognized in other comprehensive income. If the derivative is not designated as a hedge, changes in the fair value of the derivative are recognized in earnings. Refer to Note 11 – Derivative Instruments and Hedging Activities for a discussion of hedging activities for the periods presented.
Stock-based Compensation	Stock-based Compensation The Company’s stock-based compensation consists of liability and equity based restricted stock awards with service, performance and market conditions. Restricted stock awards are measured at the grant date fair value and amortized to stock compensation expense over the requisite service period. The fair value of restricted stock awards with market conditions is measured utilizing Monte Carlo simulations. Awards with performance or market conditions will vest based on the Company’s achievement level relative to specific requirements. For all restricted stock awards, the Company accounts for forfeitures as they occur. Refer to Note 13 – Stock-Based Compensation for a discussion of the Company’s stock-based compensation for the periods presented.
Segments	Segments The Company’s chief operating decision maker (“CODM”) regularly reviews the Company’s results to assess the Company’s performance and allocates resources at a consolidated level. Although the consolidated results include the Company’s three products (i) HSD; (ii) Video; and (iii) Telephony and are used to assess performance by product(s), decisions to allocate resources (including capital) are made to benefit the consolidated Company. The three products are delivered through a unified network and have similar types or classes of customers. Furthermore, the decision to allocate resources to plant maintenance and to upgrade the Company’s service delivery over a unified network to the customer benefits all three product offerings and is not based on any given service product. As such, management has determined that the Company has one reportable segment, broadband services.
Recently Issued Accounting Standards and Recently Adopted Accounting Pronouncements	Recently Issued Accounting Pronouncements ASU 2020-04, Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting ​ In March 2020, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2020-04, Reference Rate Reform (Topic 848), Facilitation of the Effects of Reference Rate Reform on Financial Reporting (“ASU 2020-04”). ASU 2020-04 provides optional guidance, expedients and exceptions for a limited period of time to ease the potential burden in accounting for (or recognizing the effects of) reference rate reform on financial reporting. The amendments in this update apply to all entities, subject to meeting the criteria, which participate in contracts, hedging relationships and other transactions that reference LIBOR or another reference rate expected to be discontinued because of reference rate reform. ASU 2020-04 was subsequently amended by ASU 2021-01, Reference Rate Reform (Topic 848), Scope, which refines the scope of Topic 848 and permits optional expedients and exceptions when accounting for derivative contracts and certain hedging relationships. The amendments of these updates are available to all entities as of March 12, 2020 through December 31, 2022. The Company has not yet adopted these amendments, but has determined the impact of adopting this guidance will not have a material impact on its financial position, results of operations and cash flows. Recently Adopted Accounting Pronouncements ASU 2019-12, Income Taxes —Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes ​ In December 2019, the FASB issued ASU 2019-12, Income Taxes (Topic 740), Simplifying the Accounting for Income Taxes (“ASU 2019-12”). ASU 2019-12 simplifies the accounting for income taxes by removing certain exceptions to the general principles in Topic 740. The amendments also improve consistent application of and simplify GAAP for other areas of Topic 740 by clarifying and amending existing guidance. ASU 2019-12 is effective for public business entities for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2020. The Company adopted this guidance prospectively as of January 1, 2021. The adoption did not have a material impact on the Company’s financial position, results of operations or cash flows.

Organization and Basis of Pre_2

Organization and Basis of Presentation (Tables)	12 Months Ended
	Dec. 31, 2021
Organization and Basis of Presentation
Schedule of discontinued operations - assets and liabilities, components of income, revenue by service offering and non-cash items and capital expenditure	​ ​ ​ ​ ​ ​ ​ December 31, ​ 2020 ​ ​ (in millions) Assets ​ Current assets ​ Accounts receivable—trade, net of allowance for doubtful accounts of $1.8 ​ $ 25.1 Accounts receivable—other, net ​ 0.9 Prepaid expenses and other ​ 13.2 Total current assets ​ 39.2 Right-of-use lease assets—operating ​ ​ 2.8 Property, plant and equipment, net ​ 379.4 Franchise operating rights ​ 165.4 Goodwill ​ 183.7 Intangible assets subject to amortization, net ​ 0.2 Other non-current assets ​ 8.5 Total assets ​ $ 779.2 Liabilities ​ Current liabilities ​ Accounts payable—trade ​ $ 11.4 Current portion of long-term lease liability—operating ​ ​ 0.7 Accrued liabilities and other ​ 18.9 Current portion of unearned service revenue ​ 16.9 Total current liabilities ​ 47.9 Long-term lease liability—operating ​ ​ 2.3 Total liabilities ​ $ 50.2 ​ The following table presents information regarding certain components of income from discontinued operations: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Year ended December 31, ​ ​ 2021 (1) 2020 ​ 2019 ​ ​ (in millions) Revenue ​ $ 308.3 ​ $ 418.2 ​ $ 418.8 Costs and expenses: ​ ​ ​ ​ Operating (excluding depreciation and amortization) ​ 112.0 ​ 165.0 ​ 178.4 Selling, general and administrative ​ 11.8 ​ 12.3 ​ 13.0 Depreciation and amortization ​ 41.0 ​ 79.6 ​ 72.8 ​ ​ 164.8 ​ 256.9 ​ 264.2 Income from operations ​ 143.5 ​ 161.3 ​ 154.6 Other income (expense): ​ ​ ​ ​ Interest income (expense) ​ ​ 0.4 ​ ​ (0.7) ​ ​ (0.2) Gain on sale of assets, net ​ ​ 1,001.8 ​ ​ — ​ ​ — Other income, net ​ 0.1 ​ 0.5 ​ (0.2) Income from discontinued operations before provision for income tax ​ 1,145.8 ​ 161.1 ​ 154.2 Income tax expense ​ (306.7) ​ (38.4) ​ (35.4) Income from discontinued operations ​ $ 839.1 ​ $ 122.7 ​ $ 118.8 (1) Includes the activity for the Cleveland and Columbus, Ohio markets through September 1, 2021 and the Chicago, Illinois, Evansville, Indiana, and Baltimore, Maryland markets through November 1, 2021. ​ The following table presents revenue by service offering from discontinued operations: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Year ended December 31, ​ 2021(1) 2020 2019 ​ ​ (in millions) Residential subscription ​ ​ ​ ​ ​ ​ ​ ​ ​ HSD ​ $ 150.1 ​ $ 185.6 ​ $ 170.4 Video ​ 103.2 ​ 157.4 ​ ​ 166.2 Telephony ​ 11.5 ​ 16.9 ​ ​ 18.9 Total Residential subscription ​ $ 264.8 ​ $ 359.9 ​ $ 355.5 Business subscription ​ ​ ​ ​ ​ ​ ​ ​ ​ HSD ​ $ 17.8 ​ $ 22.6 ​ $ 21.3 Video ​ ​ 2.7 ​ ​ 3.6 ​ ​ 3.6 Telephony ​ ​ 8.4 ​ ​ 11.9 ​ ​ 12.1 Total business subscription ​ $ 28.9 ​ $ 38.1 ​ $ 37.0 Total subscription services revenue ​ ​ 293.7 ​ ​ 398.0 ​ ​ 392.5 Other business services revenue ​ ​ 1.6 ​ ​ 1.9 ​ ​ 2.8 Other revenue ​ ​ 13.0 ​ ​ 18.3 ​ ​ 23.5 Total revenue ​ $ 308.3 ​ $ 418.2 ​ $ 418.8 (1) Includes the activity for the Cleveland and Columbus, Ohio markets through September 1, 2021 and the Chicago, Illinois, Evansville, Indiana, and Baltimore, Maryland markets through November 1, 2021. The following table presents specified items of cash flow and significant non-cash items of discontinued operations: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Year ended December 31, ​ 2021 (1) 2020 2019 ​ ​ (in millions) Specified items of cash flow: ​ ​ ​ ​ ​ Capital expenditures ​ $ 45.4 ​ $ 62.7 ​ $ 103.2 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Non-cash operating activities: ​ ​ ​ ​ ​ ​ ​ ​ Operating lease additions ​ $ 0.7 ​ $ 0.7 ​ $ — Non-cash investing activities: ​ ​ ​ ​ ​ ​ ​ ​ ​ Capital expenditure accounts payable and accruals ​ $ — ​ $ 2.1 ​ $ 1.0 (1) Includes the activity for the Cleveland and Columbus, Ohio markets through September 1, 2021 and the Chicago, Illinois, Evansville, Indiana, and Baltimore, Maryland markets through November 1, 2021. (1)

Summary of Significant Accoun_3

Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2021
Summary of Significant Accounting Policies
Schedule of estimated useful lives of property, plant and equipment	​ ​ ​ ​ ​ ​ ​ Estimated Useful Asset Category Lives (Years) Office and technical equipment 3 - 10 ​ Computer equipment and software 3 ​ Customer premise equipment 5 ​ Vehicles 5 ​ Telephony infrastructure ​ 5 - 7 ​ Headend equipment 7 ​ Distribution facilities 10 ​ Building and leasehold improvements 5 - 20 ​

Revenue from Contracts with C_2

Revenue from Contracts with Customers (Tables)	12 Months Ended
	Dec. 31, 2021
Revenue from Contracts with Customers
Schedule of revenue by service offering	The following table presents revenue by service offering: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Year ended December 31, ​ 2021 2020 2019 ​ ​ (in millions) Residential subscription ​ ​ ​ ​ ​ ​ ​ ​ ​ HSD ​ $ 329.0 ​ $ 294.5 ​ $ 270.3 Video ​ 204.1 ​ 236.4 ​ ​ 251.2 Telephony ​ 28.5 ​ 35.6 ​ ​ 41.0 Total Residential subscription ​ $ 561.6 ​ $ 566.5 ​ $ 562.5 Business subscription ​ ​ ​ ​ ​ ​ ​ ​ ​ HSD ​ $ 70.1 ​ $ 64.5 ​ $ 59.0 Video ​ ​ 11.4 ​ ​ 11.4 ​ ​ 11.0 Telephony ​ ​ 28.9 ​ ​ 29.7 ​ ​ 30.7 Total business subscription ​ $ 110.4 ​ $ 105.6 ​ $ 100.7 Total subscription services revenue ​ ​ 672.0 ​ ​ 672.1 ​ ​ 663.2 Other business services revenue(1) ​ ​ 22.3 ​ ​ 23.4 ​ ​ 24.6 Other revenue ​ ​ 31.4 ​ ​ 34.7 ​ ​ 39.2 Total revenue ​ $ 725.7 ​ $ 730.2 ​ $ 727.0 (1) Includes wholesale and colocation lease revenue of $19.4 million for both years ended December 31, 2021 and 2020 and $18.8 million for the year ended 2019.
Schedule of activity and costs of current and non-current costs of obtaining contracts	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2021 ​ 2020 ​ 2019 ​ ​ (in millions) Balance at beginning of period ​ $ 31.8 ​ $ 20.9 ​ $ 6.5 Deferral ​ 15.5 ​ 17.4 ​ 18.1 Amortization ​ (10.0) ​ (6.5) ​ (3.7) Balance at end of period ​ $ 37.3 ​ $ 31.8 ​ $ 20.9 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2021 ​ December 31, 2020 ​ ​ (in millions) Current costs of obtaining contracts with customers ​ $ 14.1 ​ $ 3.6 Non-current costs of obtaining contracts with customers ​ ​ 23.2 ​ ​ 28.2 Total costs of obtaining contracts with customers ​ $ 37.3 ​ $ 31.8
Schedule of activity of contract liabilities and current and non-current contract liabilities	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2021 ​ 2020 ​ 2019 ​ ​ (in millions) Balance at beginning of period ​ $ 2.9 ​ $ 2.8 ​ $ 2.6 Deferral ​ 12.4 ​ 8.8 ​ 9.7 Revenue recognized ​ (12.0) ​ (8.7) ​ (9.5) Balance at end of period ​ $ 3.3 ​ $ 2.9 ​ $ 2.8 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, 2021 ​ December 31, 2020 ​ ​ (in millions) Current contract liabilities ​ $ 2.9 ​ $ 2.4 Non-current contract liabilities ​ ​ 0.4 ​ ​ 0.5 Total contract liabilities ​ $ 3.3 ​ $ 2.9
Summary of expected revenue to be recognized in future periods related to performance obligations which have not been satisfied or are partially unsatisfied	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2022 2023 2024 Thereafter Total ​ ​ (in millions) Subscription services ​ $ 39.2 ​ $ 20.2 ​ $ 8.0 ​ $ 2.5 ​ $ 69.9 Other business services ​ 3.3 ​ 1.5 ​ 0.6 ​ — ​ 5.4 Total expected revenue ​ $ 42.5 ​ $ 21.7 ​ $ 8.6 ​ $ 2.5 ​ $ 75.3
Schedule of change in the allowance for doubtful accounts for trade accounts receivable	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Year ended ​ ​ December 31, ​ 2021 2020 ​ ​ (in millions) Balance at beginning of period ​ $ 6.7 ​ $ 6.4 Provision charged to expense ​ 8.3 ​ 11.6 Accounts written off, net of recoveries ​ (10.7) ​ (11.3) Balance at end of period ​ $ 4.3 ​ $ 6.7

Property, Plant and Equipment_2

Property, Plant and Equipment, Net (Tables)	12 Months Ended
	Dec. 31, 2021
Property, Plant and Equipment, Net
Schedule of property, plant and equipment	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ December 31, ​ 2021 2020 ​ ​ (in millions) Distribution facilities ​ $ 1,238.3 ​ $ 1,148.8 Customer premise equipment ​ 267.7 ​ 266.2 Head-end equipment ​ 228.5 ​ 209.5 Telephony infrastructure ​ 52.4 ​ 52.5 Computer equipment and software ​ 132.5 ​ 102.5 Vehicles ​ 23.7 ​ 22.7 Buildings and leasehold improvements ​ 32.1 ​ 31.0 Office and technical equipment ​ 18.9 ​ 18.7 Land ​ 4.4 ​ 4.4 Construction in progress (including material inventory and other) ​ 34.9 ​ 32.8 Total property, plant and equipment ​ 2,033.4 ​ 1,889.1 Less accumulated depreciation ​ (1,311.1) ​ (1,168.2) ​ ​ $ 722.3 ​ $ 720.9

Leases (Tables)

Leases (Tables)	12 Months Ended
	Dec. 31, 2021
Leases
Schedule of lease costs	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Year ended ​ ​ ​ ​ December 31, ​ ​ Classification ​ ​ 2021 ​ 2020 ​ ​ ​ ​ (in millions) Finance lease cost ​ ​ ​ ​ ​ ​ ​ ​ Amortization of leased asset ​ Depreciation ​ $ 10.1 $ 7.6 Interest on lease liabilities ​ Interest expense ​ ​ 1.1 ​ ​ 1.2 Operating lease cost(1) ​ Operating expense ​ ​ 8.0 ​ ​ 8.0 Sublease income ​ Other income ​ ​ (0.5) ​ ​ — Net lease cost ​ ​ ​ $ 18.7 ​ $ 16.8 (1) Includes short-term lease and variable costs of $1.2 and $1.1 million for the years ended December 31, 2021 and 2020, respectively.
Schedule of lease maturities, Finance Leases,	The following table presents aggregate lease maturities as of December 31, 2021: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Finance Leases Operating Leases Total ​ ​ (in millions) 2022 $ 10.9 ​ $ 6.0 ​ $ 16.9 2023 ​ ​ 7.7 ​ ​ 5.0 ​ ​ 12.7 2024 ​ ​ 3.8 ​ ​ 4.0 ​ ​ 7.8 2025 ​ ​ 0.7 ​ ​ 2.7 ​ ​ 3.4 2026 ​ ​ 0.3 ​ ​ 1.8 ​ ​ 2.1 Thereafter ​ ​ — ​ ​ 2.1 ​ ​ 2.1 Total lease payments ​ ​ 23.4 ​ ​ 21.6 ​ ​ 45.0 Less: interest ​ ​ 1.1 ​ ​ 2.7 ​ ​ 3.8 Present value of lease liabilities ​ $ 22.3 ​ $ 18.9 ​ $ 41.2 ​ The following table presents aggregate lease maturities as of December 31, 2020: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Finance Leases Operating Leases Total ​ ​ (in millions) 2021 $ 15.5 ​ $ 7.1 ​ $ 22.6 2022 ​ ​ 11.8 ​ ​ 6.4 ​ ​ 18.2 2023 ​ ​ 5.8 ​ ​ 4.9 ​ ​ 10.7 2024 ​ ​ 1.3 ​ ​ 3.9 ​ ​ 5.2 2025 ​ ​ 0.4 ​ ​ 2.6 ​ ​ 3.0 Thereafter ​ ​ — ​ ​ 3.9 ​ ​ 3.9 Total lease payments ​ ​ 34.8 ​ ​ 28.8 ​ ​ 63.6 Less: interest ​ ​ 1.9 ​ ​ 4.0 ​ ​ 5.9 Total lease payments ​ $ 32.9 ​ $ 24.8 ​ $ 57.7
Schedule of lease maturities, Operating Leases	The following table presents aggregate lease maturities as of December 31, 2021: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Finance Leases Operating Leases Total ​ ​ (in millions) 2022 $ 10.9 ​ $ 6.0 ​ $ 16.9 2023 ​ ​ 7.7 ​ ​ 5.0 ​ ​ 12.7 2024 ​ ​ 3.8 ​ ​ 4.0 ​ ​ 7.8 2025 ​ ​ 0.7 ​ ​ 2.7 ​ ​ 3.4 2026 ​ ​ 0.3 ​ ​ 1.8 ​ ​ 2.1 Thereafter ​ ​ — ​ ​ 2.1 ​ ​ 2.1 Total lease payments ​ ​ 23.4 ​ ​ 21.6 ​ ​ 45.0 Less: interest ​ ​ 1.1 ​ ​ 2.7 ​ ​ 3.8 Present value of lease liabilities ​ $ 22.3 ​ $ 18.9 ​ $ 41.2 ​ The following table presents aggregate lease maturities as of December 31, 2020: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Finance Leases Operating Leases Total ​ ​ (in millions) 2021 $ 15.5 ​ $ 7.1 ​ $ 22.6 2022 ​ ​ 11.8 ​ ​ 6.4 ​ ​ 18.2 2023 ​ ​ 5.8 ​ ​ 4.9 ​ ​ 10.7 2024 ​ ​ 1.3 ​ ​ 3.9 ​ ​ 5.2 2025 ​ ​ 0.4 ​ ​ 2.6 ​ ​ 3.0 Thereafter ​ ​ — ​ ​ 3.9 ​ ​ 3.9 Total lease payments ​ ​ 34.8 ​ ​ 28.8 ​ ​ 63.6 Less: interest ​ ​ 1.9 ​ ​ 4.0 ​ ​ 5.9 Total lease payments ​ $ 32.9 ​ $ 24.8 ​ $ 57.7 ​
Schedule of weighted average remaining lease term and discount rate	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Year ended December 31, ​ ​ 2021 ​ ​ 2020 Weighted-average remaining lease term (in years) ​ ​ ​ ​ ​ Finance Leases ​ 2.5 ​ ​ 2.6 ​ Operating Leases ​ 4.5 ​ ​ 5.0 ​ Weighted-average discount rate ​ ​ ​ ​ ​ ​ Finance Leases ​ 4.02 % ​ 4.49 % Operating Leases ​ 5.75 % ​ 5.96 %
Schedule of other information related to operating and finance leases	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Year ended December 31, ​ ​ 2021 ​ 2020 ​ ​ (in millions) Cash paid for amounts included in the measurement of lease liabilities: ​ ​ ​ ​ ​ ​ Operating cash flows from operating leases $ 6.4 $ 6.6 Operating cash flows from finance leases ​ ​ 1.1 ​ ​ 1.2 Financing cash flows from finance leases ​ ​ 22.2 ​ ​ 10.7 Right-of-use assets obtained in exchange for lease obligations: ​ ​ ​ ​ ​ ​ Finance leases ​ ​ 11.5 ​ ​ 20.5 Operating leases ​ ​ 1.0 ​ ​ 5.8

Franchise Operating Rights & _2

Franchise Operating Rights & Goodwill (Tables)	12 Months Ended
	Dec. 31, 2021
Franchise Operating Rights & Goodwill
Schedule of changes in the carrying amounts of franchise operating rights and goodwill	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ January 1, ​ ​ ​ December 31, ​ 2021 Impairment 2021 ​ ​ (in millions) Franchise operating rights ​ $ 620.1 ​ $ — ​ $ 620.1 Goodwill ​ 225.1 ​ — ​ 225.1 ​ ​ $ 845.2 ​ $ — ​ $ 845.2 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ January 1, ​ ​ ​ December 31, ​ 2020 Impairment 2020 ​ ​ (in millions) Franchise operating rights ​ $ 634.1 ​ $ (14.0) ​ $ 620.1 Goodwill ​ 225.1 ​ — ​ 225.1 ​ ​ $ 859.2 ​ $ (14.0) ​ $ 845.2

Intangible Assets Subject to _2

Intangible Assets Subject to Amortization (Tables)	12 Months Ended
	Dec. 31, 2021
Intangible Assets Subject to Amortization
Schedule of intangible assets subject to amortization consist primarily of customer relationships and changes in the carrying amounts	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ January 1, ​ ​ ​ ​ ​ ​ ​ December 31, ​ 2021 Acquisitions Amortization 2021 ​ ​ (in millions) Other ​ $ 1.9 ​ $ 0.2 ​ $ (0.4) ​ $ 1.7 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ January 1, ​ ​ ​ ​ ​ ​ ​ December 31, ​ 2020 Acquisitions Amortization 2020 ​ ​ (in millions) Customer relationships ​ $ 0.4 ​ $ 0.1 ​ $ (0.5) ​ $ — Other ​ 2.3 ​ — ​ (0.4) ​ 1.9 ​ ​ $ 2.7 ​ $ 0.1 ​ $ (0.9) ​ $ 1.9
Schedule of amortization expenses of the intangible assets	Scheduled amortization of the Company’s intangible assets as of December 31, 2021 for the next five years is as follows (in millions): ​ ​ ​ ​ 2022 $ 0.4 2023 ​ 0.4 2024 ​ 0.3 2025 ​ 0.2 2026 ​ 0.2 Thereafter ​ 0.2 ​ ​ $ 1.7

Accrued Liabilities and Other (

Accrued Liabilities and Other (Tables)	12 Months Ended
	Dec. 31, 2021
Accrued Liabilities and Other
Schedule of accrued liabilities and other	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ December 31, ​ 2021 2020 ​ ​ (in millions) Property, income, sales and use taxes(1) ​ $ 132.7 ​ $ 5.6 Payroll and employee benefits ​ ​ 29.6 ​ ​ 28.0 Programming costs ​ ​ 19.3 ​ ​ 19.7 Customer cash collections (Transition Services Agreements) ​ ​ 17.5 ​ ​ — Other accrued liabilities ​ 9.5 ​ 8.2 Franchise and revenue sharing fees ​ 7.9 ​ 7.1 Utility pole costs ​ 2.2 ​ 1.7 Interest rate swaps ​ ​ — ​ ​ 9.4 ​ ​ $ 218.7 ​ $ 79.7

Earnings (Loss) per Common Sh_2

Earnings (Loss) per Common Share (Tables)	12 Months Ended
	Dec. 31, 2021
Earnings (Loss) per Common Share
Schedule of computation of income per share	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Year ended ​ ​ December 31, ​ 2021 2020 2019 ​ ​ (in millions, except share data) Loss from continuing operations ​ $ (68.6) ​ $ (108.3) ​ $ (82.4) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Income from discontinued operations ​ $ 839.1 ​ $ 122.7 ​ $ 118.8 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Net income ​ $ 770.5 ​ $ 14.4 ​ $ 36.4 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Basic weighted-average shares ​ 82,720,934 ​ 81,561,707 ​ 80,713,926 Effect of dilutive securities: ​ ​ ​ ​ ​ ​ Restricted stock awards ​ — ​ — ​ — Diluted weighted-average shares ​ 82,720,934 ​ 81,561,707 ​ 80,713,926 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Basic and diluted (loss) per ​ ​ ​ ​ ​ ​ ​ ​ ​ Basic ​ $ (0.83) ​ $ (1.33) ​ $ (1.02) Diluted ​ $ (0.83) ​ $ (1.33) ​ $ (1.02) ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Basic and diluted earnings per ​ ​ ​ ​ ​ ​ ​ ​ ​ Basic ​ $ 10.14 ​ $ 1.51 ​ $ 1.47 Diluted ​ $ 10.14 ​ $ 1.51 ​ $ 1.47 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Basic and diluted earnings per common share ​ ​ ​ ​ ​ ​ ​ ​ ​ Basic ​ $ 9.31 ​ $ 0.18 ​ $ 0.45 Diluted ​ $ 9.31 ​ $ 0.18 ​ $ 0.45

Long-Term Debt and Finance Le_2

Long-Term Debt and Finance Leases (Tables)	12 Months Ended
	Dec. 31, 2021
Long-Term Debt and Finance Leases
Summary of long-term debt and finance lease obligations	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ ​ December 31, 2021 ​ 2020 ​ Available ​ ​ ​ ​ ​ borrowing ​ Effective ​ ​ Outstanding ​ Outstanding ​ ​ capacity ​ interest rate(1) ​ balance balance ​ ​ (in millions) Long-term debt: ​ ​ ​ ​ Term B Loans, net(2) ​ $ — 3.50 % ​ $ 724.2 ​ $ 2,199.9 Revolving Credit Facility ​ 250.0 0.00 % ​ — ​ 38.0 Total long-term debt ​ $ 250.0 ​ ​ ​ 724.2 ​ 2,237.9 Other Financing ​ ​ ​ ​ ​ ​ ​ ​ 0.4 ​ ​ 0.8 Finance lease obligations ​ ​ ​ 22.3 ​ 32.9 Total long-term debt, finance lease obligations and other ​ ​ ​ 746.9 ​ 2,271.6 Debt issuance costs, net(3) ​ ​ ​ (5.5) ​ (5.6) Sub-total ​ ​ ​ 741.4 ​ 2,266.0 Less current portion ​ ​ ​ (17.9) ​ (37.5) Long-term portion ​ ​ ​ ​ $ 723.5 ​ $ 2,228.5 (1) Represents the effective interest rate in effect for all borrowings outstanding as of the year ended December 31, 2021 pursuant to each debt instrument including the applicable margin. (2) At December 31, 2021 and 2020 includes $5.8 million and $6.1 million of net unamortized discounts, respectively. (3) At December 31, 2021 and 2020 debt issuance costs include $4.1 million and $4.4 million related to Term B Loans and $1.4 million and $1.2 million related to the Revolving Credit Facility, respectively.
Schedule of amortization of debt issuance costs and debt discount,	Amortization of debt issuance costs and debt discount, all of which are included in interest expense in the accompanying consolidated statements of operations, for the years ended December 31, 2021, 2020 and 2019 are as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ 2021 2020 2019 ​ ​ (in millions) Amortization of deferred issuance costs ​ $ 2.4 ​ $ 2.4 ​ $ 2.4 Amortization of debt discount ​ 2.3 ​ 2.3 ​ 2.3
Schedule of principal maturities of our long-term debt, inclusive of debt discount	Principal maturities of our long-term debt, excluding finance lease obligations, as of December 31, 2021 are as follows: ​ ​ ​ ​ ​ Long-term Debt ​ ​ (in millions) 2022 ​ $ 7.3 2023 ​ 7.3 2024 ​ 7.3 2025 ​ ​ 7.3 2026 ​ ​ 7.3 Thereafter ​ 693.5 ​ ​ $ 730.0

Derivative Instruments and He_2

Derivative Instruments and Hedging Activities (Tables)	12 Months Ended
	Dec. 31, 2021
Derivative Instruments and Hedging Activities
Schedule of gains and losses on derivatives	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Year ended ​ ​ December 31, ​ 2021 2020 Interest rate swap contracts(1) ​ (in millions) Gain recorded in AOCL on derivatives, before tax ​ $ 8.5 ​ $ 11.8 Tax impact ​ ​ (2.0) ​ ​ (2.8) Gain recorded in AOCL on derivatives, net ​ ​ 6.5 ​ ​ 9.0 (1) Gains (losses) on derivatives reclassified from AOCL into income will be included in “Interest expense” in the consolidated statements of operations, the same income statement line item as the earnings effect of the hedged item. Losses recognized in the consolidated statements of operations for the year ended December 31, 2021, 2020 and 2019 total $9.5 million, $21.2 million and $6.2 million, respectively.

Stock-Based Compensation (Table

Stock-Based Compensation (Tables)	12 Months Ended
	Dec. 31, 2021
Stock-Based Compensation
Summary of the restricted stock awards activity	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Year ended December 31, ​ ​ 2021 ​ 2020 2019 ​ ​ ​ ​ ​ Weighted Average ​ ​ ​ ​ Weighted Average ​ ​ ​ ​ Weighted Average ​ ​ Shares ​ ​ Grant Price ​ Shares ​ ​ Grant Price ​ Shares ​ ​ Grant Price Outstanding, beginning of period 4,990,971 ​ $ 5.71 ​ 3,140,168 ​ $ 8.56 ​ 2,356,418 ​ $ 9.23 Granted 1,422,358 ​ ​ 17.17 3,585,929 ​ ​ 4.44 ​ 2,075,455 ​ ​ 8.41 Vested ​ (1,704,596) ​ 6.23 (1,154,151) ​ 8.87 ​ (825,764) ​ 9.84 Forfeited (383,609) ​ 7.71 ​ (580,975) ​ 7.05 ​ (465,941) ​ 9.01 Outstanding, end of period(1) 4,325,124 ​ $ 9.10 4,990,971 ​ $ 5.71 ​ 3,140,168 ​ $ 8.56 (1) The total outstanding non-vested shares of restricted stock awards granted to employees and directors are included in total outstanding shares as of December 31, 2021, 2020 and 2019.

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2021
Income Taxes
Schedule of income tax benefit (expense)	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Year ended December 31, ​ 2021 2020 2019 ​ (in millions) Current tax (expense) benefit ​ ​ ​ ​ ​ ​ ​ ​ ​ Federal ​ $ — ​ $ — ​ $ — State ​ (1.6) ​ (1.9) ​ 3.1 Total current tax ​ (1.6) ​ (1.9) ​ 3.1 Deferred tax (expense) benefit ​ ​ ​ ​ ​ ​ ​ ​ ​ Federal ​ 22.2 ​ 34.2 ​ 25.5 State ​ (6.8) ​ (1.7) ​ 5.3 Total deferred tax ​ 15.4 ​ 32.5 ​ 30.8 Income tax benefit ​ $ 13.8 ​ $ 30.6 ​ $ 33.9
Schedule of reconciliation of income tax provision computed at statutory tax rates to effective tax rate	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Year ended December 31, ​ 2021 2020 2019 ​ ​ (in millions) Statutory federal income taxes ​ $ 17.3 ​ $ 29.2 ​ $ 24.5 State income taxes ​ 0.6 ​ 4.8 ​ 0.8 Tax status & tax rate change ​ 0.1 ​ 0.8 ​ 0.9 Other true-ups ​ ​ 0.3 ​ ​ (2.5) ​ ​ 0.8 Equity compensation ​ ​ 3.8 ​ ​ (1.0) ​ ​ (0.3) Other permanent differences ​ (2.4) ​ (0.4) ​ (0.4) Goodwill impairment ​ ​ — ​ ​ — ​ ​ — Research and development tax credits ​ ​ 2.5 ​ ​ 2.2 ​ ​ — Uncertain tax positions ​ (0.1) ​ (0.2) ​ 3.7 Change in valuation allowance ​ (8.3) ​ (2.3) ​ 3.9 Income tax (expense) benefit, net ​ $ 13.8 ​ $ 30.6 ​ $ 33.9
Schedule of components of deferred tax assets and deferred tax liabilities	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ 2021 2020 ​ (in millions) Deferred tax assets ​ ​ ​ ​ ​ ​ Allowances and other reserves ​ $ 2.2 ​ $ 6.3 Net operating loss carryforwards ​ 82.1 ​ 223.1 Research and development tax credits ​ ​ — ​ ​ 4.1 Interest hedging ​ ​ — ​ ​ 2.0 Other ​ 1.0 ​ 1.4 Total deferred tax assets ​ ​ 85.3 ​ ​ 236.9 Less: valuation allowance ​ (35.5) ​ (30.8) Deferred tax asset ​ $ 49.8 ​ $ 206.1 ​ ​ ​ ​ ​ ​ ​ Deferred tax liabilities ​ ​ ​ ​ ​ ​ Depreciation and amortization ​ $ (145.8) ​ $ (206.3) Franchise operating rights ​ (161.5) ​ (198.6) Debt issuance costs ​ ​ — ​ ​ (1.8) Total deferred tax liabilities ​ ​ (307.3) ​ ​ (406.7) Net deferred tax liabilities ​ $ (257.5) ​ $ (200.6)
Schedule of reconciliation of unrecognized tax benefits	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Year ended December 31, ​ 2021 2020 2019 ​ ​ (in millions) Unrecognized tax benefits—January 1st ​ $ 13.7 ​ $ 11.4 ​ $ 28.0 Gross increases—tax positions in prior period ​ — ​ 0.7 ​ — Gross decreases—tax positions in prior period ​ (0.7) ​ — ​ (12.8) Gross increases—tax positions in current period ​ 1.2 ​ 1.6 ​ — Settlements ​ — ​ — ​ (3.8) Unrecognized tax benefits—December 31st ​ $ 14.2 ​ $ 13.7 ​ $ 11.4

Employee Benefits (Tables)

Employee Benefits (Tables)	12 Months Ended
	Dec. 31, 2021
Employee Benefits
Schedule of assets and liabilities of the plan included in the accompanying combined consolidated balance sheets	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ December 31, ​ 2021 2020 ​ ​ (in millions) Prepaid expenses and other (current assets) ​ $ 1.9 ​ $ 1.7 Accrued liabilities and other (current liabilities) ​ $ 1.9 ​ $ 1.7

Organization and Basis of Pre_3

Organization and Basis of Presentation - Markets and segments (Details)	12 Months Ended
	Dec. 31, 2021item
Organization and Basis of Presentation
Number of markets	14

Organization and Basis of Pre_4

Organization and Basis of Presentation - Discontinued Operations, General (Details) $ in Millions	Nov. 01, 2021USD ($)item	Sep. 01, 2021USD ($)item	Jun. 30, 2021USD ($)	Jun. 30, 2021USD ($)	Dec. 31, 2021USD ($)
Transition Services Agreement | Atlantic
Discontinued Operations
Agreement term		1 year
Number of optional term extensions | item		2
Period of optional term extension		3 months
Amount of employee service, processes or systems expense allocated to discontinued operations					$ 0
Transition Services Agreement | Astound Broadband
Discontinued Operations
Agreement term	12 months
Number of optional term extensions | item	2
Period of optional term extension	3 months
Amount of employee service, processes or systems expense allocated to discontinued operations					$ 0
Atlantic and Astound broadband markets | Discontinued Operations, Disposed of by sale
Discontinued Operations
Revenue percentage contributed by disposal group			37.00%	37.00%
Astound broadband markets | Discontinued Operations, Disposed of by sale
Discontinued Operations
Consideration	$ 661		$ 661	$ 661
Atlantic broadband markets | Discontinued Operations, Disposed of by sale
Discontinued Operations
Consideration		$ 1,125	$ 1,125	$ 1,125

Organization and Basis of Pre_5

Organization and Basis of Presentation - Discontinued Operations, Assets and Liabilities (Details) $ in Millions	Dec. 31, 2020USD ($)
Assets
Total current assets	$ 39.2
Current liabilities
Total current liabilities	47.9
Atlantic and Astound broadband markets | Discontinued Operations, Held-for-sale
Assets
Accounts receivable-trade, net of allowance for doubtful accounts of $1.1 and $1.8, respectively	25.1
Accounts receivable-other, net	0.9
Prepaid expenses and other	13.2
Total current assets	39.2
Right-of-use lease assets-operating	2.8
Property, plant and equipment, net	379.4
Franchise operating rights	165.4
Goodwill	183.7
Intangible assets subject to amortization, net	0.2
Other non-current assets	8.5
Total assets	779.2
Current liabilities
Accounts payable-trade	11.4
Current portion of long-term lease liability-operating	0.7
Accrued liabilities and other	18.9
Current portion of unearned service revenue	16.9
Total current liabilities	47.9
Long-term lease liability-operating	2.3
Total liabilities	50.2
Accounts receivable-trade, - Allowance for doubtful accounts	$ 1.8

Organization and Basis of Pre_6

Organization and Basis of Presentation - Discontinued Operations, Components of Income (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Other income (expense):
Income from discontinued operations, net of tax	$ 839.1	$ 122.7	$ 118.8
Atlantic and Astound broadband markets | Discontinued Operations, Disposed of by sale
Discontinued operations - Components of income
Revenue	308.3
Costs and expenses
Operating (excluding depreciation and amortization)	112
Selling, general and administrative	11.8
Depreciation and amortization	41
Total costs and expenses	164.8
Income from operations	143.5
Other income (expense):
Interest income (expense)	0.4
Gain on sale of assets, net	1,001.8
Other income, net	0.1
Income from discontinued operations before provision for income tax	1,145.8
Income tax expense	(306.7)
Income from discontinued operations, net of tax	$ 839.1
Atlantic and Astound broadband markets | Discontinued Operations, Held-for-sale
Discontinued operations - Components of income
Revenue		418.2	418.8
Costs and expenses
Operating (excluding depreciation and amortization)		165	178.4
Selling, general and administrative		12.3	13
Depreciation and amortization		79.6	72.8
Total costs and expenses		256.9	264.2
Income from operations		161.3	154.6
Other income (expense):
Interest income (expense)		(0.7)	(0.2)
Other income, net		0.5	(0.2)
Income from discontinued operations before provision for income tax		161.1	154.2
Income tax expense		(38.4)	(35.4)
Income from discontinued operations, net of tax		$ 122.7	$ 118.8

Organization and Basis of Pre_7

Organization and Basis of Presentation - Discontinued Operations, Revenue by Service Offering (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Discontinued Operations
Other revenue	$ 31.4	$ 34.7	$ 39.2
Total revenue	725.7	730.2	727
Subscription services
Discontinued Operations
Revenue	672	672.1	663.2
Other business services
Discontinued Operations
Revenue	22.3	23.4	24.6
Other business services - Wholesale and colocation lease revenue
Discontinued Operations
Revenue	19.4	19.4	18.8
Residential Subscription | Subscription services
Discontinued Operations
Revenue	561.6	566.5	562.5
Residential Subscription | HSD
Discontinued Operations
Revenue	329	294.5	270.3
Residential Subscription | Video
Discontinued Operations
Revenue	204.1	236.4	251.2
Residential Subscription | Telephony
Discontinued Operations
Revenue	28.5	35.6	41
Business Subscription | Subscription services
Discontinued Operations
Revenue	110.4	105.6	100.7
Business Subscription | HSD
Discontinued Operations
Revenue	70.1	64.5	59
Business Subscription | Video
Discontinued Operations
Revenue	11.4	11.4	11
Business Subscription | Telephony
Discontinued Operations
Revenue	28.9	29.7	30.7
Atlantic and Astound broadband markets | Discontinued Operations, Disposed of by sale
Discontinued Operations
Other revenue	13
Total revenue	308.3
Atlantic and Astound broadband markets | Discontinued Operations, Disposed of by sale | Subscription services
Discontinued Operations
Revenue	293.7
Atlantic and Astound broadband markets | Discontinued Operations, Disposed of by sale | Other business services
Discontinued Operations
Revenue	1.6
Atlantic and Astound broadband markets | Discontinued Operations, Disposed of by sale | Residential Subscription
Discontinued Operations
Revenue	264.8
Atlantic and Astound broadband markets | Discontinued Operations, Disposed of by sale | Residential Subscription | HSD
Discontinued Operations
Revenue	150.1
Atlantic and Astound broadband markets | Discontinued Operations, Disposed of by sale | Residential Subscription | Video
Discontinued Operations
Revenue	103.2
Atlantic and Astound broadband markets | Discontinued Operations, Disposed of by sale | Residential Subscription | Telephony
Discontinued Operations
Revenue	11.5
Atlantic and Astound broadband markets | Discontinued Operations, Disposed of by sale | Business Subscription
Discontinued Operations
Revenue	28.9
Atlantic and Astound broadband markets | Discontinued Operations, Disposed of by sale | Business Subscription | HSD
Discontinued Operations
Revenue	17.8
Atlantic and Astound broadband markets | Discontinued Operations, Disposed of by sale | Business Subscription | Video
Discontinued Operations
Revenue	2.7
Atlantic and Astound broadband markets | Discontinued Operations, Disposed of by sale | Business Subscription | Telephony
Discontinued Operations
Revenue	$ 8.4
Atlantic and Astound broadband markets | Discontinued Operations, Held-for-sale
Discontinued Operations
Other revenue		18.3	23.5
Total revenue		418.2	418.8
Atlantic and Astound broadband markets | Discontinued Operations, Held-for-sale | Subscription services
Discontinued Operations
Revenue		398	392.5
Atlantic and Astound broadband markets | Discontinued Operations, Held-for-sale | Other business services
Discontinued Operations
Revenue		1.9	2.8
Atlantic and Astound broadband markets | Discontinued Operations, Held-for-sale | Residential Subscription
Discontinued Operations
Revenue		359.9	355.5
Atlantic and Astound broadband markets | Discontinued Operations, Held-for-sale | Residential Subscription | HSD
Discontinued Operations
Revenue		185.6	170.4
Atlantic and Astound broadband markets | Discontinued Operations, Held-for-sale | Residential Subscription | Video
Discontinued Operations
Revenue		157.4	166.2
Atlantic and Astound broadband markets | Discontinued Operations, Held-for-sale | Residential Subscription | Telephony
Discontinued Operations
Revenue		16.9	18.9
Atlantic and Astound broadband markets | Discontinued Operations, Held-for-sale | Business Subscription
Discontinued Operations
Revenue		38.1	37
Atlantic and Astound broadband markets | Discontinued Operations, Held-for-sale | Business Subscription | HSD
Discontinued Operations
Revenue		22.6	21.3
Atlantic and Astound broadband markets | Discontinued Operations, Held-for-sale | Business Subscription | Video
Discontinued Operations
Revenue		3.6	3.6
Atlantic and Astound broadband markets | Discontinued Operations, Held-for-sale | Business Subscription | Telephony
Discontinued Operations
Revenue		$ 11.9	$ 12.1

Organization and Basis of Pre_8

Organization and Basis of Presentation - Discontinued Operations, Cash Flow and Significant Non-Cash Items (Details) - Atlantic and Astound broadband markets - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Discontinued Operations, Held-for-sale or Disposed of by Sale
Specified items of cash flow
Capital expenditures	$ 45.4
Non-cash operating activities
Operating lease additions	$ 0.7
Discontinued Operations, Held-for-sale
Specified items of cash flow
Capital expenditures		$ 62.7	$ 103.2
Non-cash operating activities
Operating lease additions		0.7
Non-cash financing activities:
Capital expenditure accounts payable and accruals		$ 2.1	$ 1

Summary of Significant Accoun_4

Summary of Significant Accounting Policies - Provision for Doubtful Accounts (Details)	12 Months Ended
	Dec. 31, 2021
Bad Debt
Period of delinquency after which Company disconnects services to customers	100 days

Summary of Significant Accoun_5

Summary of Significant Accounting Policies - Property, Plant and Equipment (Details)	12 Months Ended
	Dec. 31, 2021
Office and technical equipment | Minimum
Estimated Useful Lives
Estimated Useful Lives	3 years
Office and technical equipment | Maximum
Estimated Useful Lives
Estimated Useful Lives	10 years
Computer equipment and software
Estimated Useful Lives
Estimated Useful Lives	3 years
Customer premise equipment
Estimated Useful Lives
Estimated Useful Lives	5 years
Vehicles
Estimated Useful Lives
Estimated Useful Lives	5 years
Telephony infrastructure | Minimum
Estimated Useful Lives
Estimated Useful Lives	5 years
Telephony infrastructure | Maximum
Estimated Useful Lives
Estimated Useful Lives	7 years
Head-end equipment
Estimated Useful Lives
Estimated Useful Lives	7 years
Distribution facilities
Estimated Useful Lives
Estimated Useful Lives	10 years
Buildings and leasehold improvements | Minimum
Estimated Useful Lives
Estimated Useful Lives	5 years
Buildings and leasehold improvements | Maximum
Estimated Useful Lives
Estimated Useful Lives	20 years

Summary of Significant Accoun_6

Summary of Significant Accounting Policies - Intangible Assets and Goodwill (Details) $ in Millions	3 Months Ended	12 Months Ended
	Dec. 31, 2021segment	Dec. 31, 2021USD ($)	Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)
Intangible Assets and Goodwill
Estimated life of franchise related customer relationships, based on subscriber base		4 years
Impairment of long-lived assets | $		$ 0	$ 0	$ 0
Number of reporting units | segment	1

Summary of Significant Accoun_7

Summary of Significant Accounting Policies - Advertising Costs (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Advertising Costs
Advertising expense	$ 39.5	$ 38	$ 32.3

Summary of Significant Accoun_8

Summary of Significant Accounting Policies - Segments (Details)	12 Months Ended
	Dec. 31, 2021productsegment
Segments
Number of products | product	3
Number of reportable segments | segment	1

Summary of Significant Accoun_9

Summary of Significant Accounting Policies - Recently Adopted Accounting Pronouncements (Details)	Jan. 01, 2021
ASU 2019-12, Income Taxes
Accounting Pronouncements
Change in Accounting Principle, Accounting Standards Update, Adopted	true

Revenue from Contracts with C_3

Revenue from Contracts with Customers - Services Length (Details)	12 Months Ended
	Dec. 31, 2021
Residential Subscription | Minimum
Revenue from Contracts with Customers
Subscription services, contract term	12 months
Residential Subscription | Maximum
Revenue from Contracts with Customers
Subscription services, contract term	24 months
Business Subscription
Revenue from Contracts with Customers
Subscription services, contract term	30 months

Revenue from Contracts with C_4

Revenue from Contracts with Customers - Revenue by Service Offering (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Revenue from Contracts with Customers
Other revenue	$ 31.4	$ 34.7	$ 39.2
Total revenue	725.7	730.2	727
Subscription services
Revenue from Contracts with Customers
Revenue	672	672.1	663.2
Other business services
Revenue from Contracts with Customers
Revenue	22.3	23.4	24.6
Other business services - Wholesale and colocation lease revenue
Revenue from Contracts with Customers
Revenue	19.4	19.4	18.8
Residential Subscription | Subscription services
Revenue from Contracts with Customers
Revenue	561.6	566.5	562.5
Residential Subscription | HSD
Revenue from Contracts with Customers
Revenue	329	294.5	270.3
Residential Subscription | Video
Revenue from Contracts with Customers
Revenue	204.1	236.4	251.2
Residential Subscription | Telephony
Revenue from Contracts with Customers
Revenue	28.5	35.6	41
Business Subscription | Subscription services
Revenue from Contracts with Customers
Revenue	110.4	105.6	100.7
Business Subscription | HSD
Revenue from Contracts with Customers
Revenue	70.1	64.5	59
Business Subscription | Video
Revenue from Contracts with Customers
Revenue	11.4	11.4	11
Business Subscription | Telephony
Revenue from Contracts with Customers
Revenue	$ 28.9	$ 29.7	$ 30.7

Revenue from Contracts with C_5

Revenue from Contracts with Customers - Costs of Obtaining Contracts (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Costs of Obtaining Contracts with Customers
Capitalized contract cost, Beginning of period	$ 31.8	$ 20.9	$ 6.5
Deferral	15.5	17.4	18.1
Amortization	(10)	(6.5)	(3.7)
Capitalized contract cost, End of period	37.3	31.8	20.9
Current costs of obtaining contracts with customers	14.1	3.6
Non-current costs of obtaining contracts with customers	23.2	28.2
Total costs of obtaining contracts with customers	$ 37.3	$ 31.8	$ 20.9
Minimum | Residential Subscription
Costs of Obtaining Contracts with Customers
Costs of contracts with customers, amortization period	3 years
Minimum | Business Subscription
Costs of Obtaining Contracts with Customers
Costs of contracts with customers, amortization period	5 years
Maximum | Residential Subscription
Costs of Obtaining Contracts with Customers
Costs of contracts with customers, amortization period	4 years
Maximum | Business Subscription
Costs of Obtaining Contracts with Customers
Costs of contracts with customers, amortization period	6 years

Revenue from Contracts with C_6

Revenue from Contracts with Customers - Contract Liabilities (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Costs of Obtaining Contracts with Customers
Contract liability, Beginning of period	$ 2.9	$ 2.8	$ 2.6
Deferral	12.4	8.8	9.7
Revenue recognized	(12)	(8.7)	(9.5)
Contract liability, End of period	3.3	2.9	2.8
Current contract liabilities	2.9	2.4
Non-current contract liabilities	0.4	0.5
Total contract liabilities	$ 3.3	$ 2.9	$ 2.8
Residential Subscription
Costs of Obtaining Contracts with Customers
Contract liability, term of contract	5 months
Business Subscription
Costs of Obtaining Contracts with Customers
Contract liability, term of contract	30 months

Revenue from Contracts with C_7

Revenue from Contracts with Customers - Unsatisfied Performance Obligations Amount (Details) $ in Millions	Dec. 31, 2021USD ($)
Business Subscription
Unsatisfied Performance Obligations
Expected revenue to be recognized in future periods	$ 75.3
Subscription services | Business Subscription
Unsatisfied Performance Obligations
Expected revenue to be recognized in future periods	69.9
Other business services | Business Subscription
Unsatisfied Performance Obligations
Expected revenue to be recognized in future periods	$ 5.4
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-01-01 | Residential Subscription | Maximum
Unsatisfied Performance Obligations
Expected period to recognize revenue of remaining performance obligations	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-01-01 | Business Subscription
Unsatisfied Performance Obligations
Expected revenue to be recognized in future periods	$ 42.5
Expected period to recognize revenue of remaining performance obligations	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-01-01 | Subscription services | Business Subscription
Unsatisfied Performance Obligations
Expected revenue to be recognized in future periods	$ 39.2
Expected period to recognize revenue of remaining performance obligations	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-01-01 | Other business services | Business Subscription
Unsatisfied Performance Obligations
Expected revenue to be recognized in future periods	$ 3.3
Expected period to recognize revenue of remaining performance obligations	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01 | Business Subscription
Unsatisfied Performance Obligations
Expected revenue to be recognized in future periods	$ 21.7
Expected period to recognize revenue of remaining performance obligations	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01 | Subscription services | Business Subscription
Unsatisfied Performance Obligations
Expected revenue to be recognized in future periods	$ 20.2
Expected period to recognize revenue of remaining performance obligations	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01 | Other business services | Business Subscription
Unsatisfied Performance Obligations
Expected revenue to be recognized in future periods	$ 1.5
Expected period to recognize revenue of remaining performance obligations	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01 | Business Subscription
Unsatisfied Performance Obligations
Expected revenue to be recognized in future periods	$ 8.6
Expected period to recognize revenue of remaining performance obligations	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01 | Subscription services | Business Subscription
Unsatisfied Performance Obligations
Expected revenue to be recognized in future periods	$ 8
Expected period to recognize revenue of remaining performance obligations	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01 | Other business services | Business Subscription
Unsatisfied Performance Obligations
Expected revenue to be recognized in future periods	$ 0.6
Expected period to recognize revenue of remaining performance obligations	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01 | Business Subscription
Unsatisfied Performance Obligations
Expected revenue to be recognized in future periods	$ 2.5
Expected period to recognize revenue of remaining performance obligations
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01 | Subscription services | Business Subscription
Unsatisfied Performance Obligations
Expected revenue to be recognized in future periods	$ 2.5
Expected period to recognize revenue of remaining performance obligations
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01 | Other business services | Business Subscription
Unsatisfied Performance Obligations
Expected period to recognize revenue of remaining performance obligations

Revenue from Contracts with C_8

Revenue from Contracts with Customers - Provision for Doubtful Accounts (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Change in the allowance for doubtful accounts
Balance at beginning of period	$ 6.7
Provision charged to expense	11.2	$ 16.8	$ 16.9
Balance at end of period	4.3	6.7
Trade accounts receivable
Change in the allowance for doubtful accounts
Balance at beginning of period	6.7	6.4
Provision charged to expense	8.3	11.6
Accounts written off, net of recoveries	(10.7)	(11.3)
Balance at end of period	4.3	6.7	$ 6.4
Non-trade accounts receivable
Change in the allowance for doubtful accounts
Accounts written off, net of recoveries	$ 0	$ (0.2)

Property, Plant and Equipment_3

Property, Plant and Equipment, Net - Components (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Property, Plant and Equipment, Net
Total property, plant and equipment	$ 2,033.4	$ 1,889.1
Less accumulated depreciation	(1,311.1)	(1,168.2)
Plant, Property and Equipment, Net	722.3	720.9
Depreciation expense	168.9	150.1	$ 131.6
Loss (gain) on write offs or sales of head-end and customer premise equipment			$ 2.1
Distribution facilities
Property, Plant and Equipment, Net
Total property, plant and equipment	1,238.3	1,148.8
Customer premise equipment
Property, Plant and Equipment, Net
Total property, plant and equipment	267.7	266.2
Head-end equipment
Property, Plant and Equipment, Net
Total property, plant and equipment	228.5	209.5
Telephony infrastructure
Property, Plant and Equipment, Net
Total property, plant and equipment	52.4	52.5
Computer equipment and software
Property, Plant and Equipment, Net
Total property, plant and equipment	132.5	102.5
Vehicles
Property, Plant and Equipment, Net
Total property, plant and equipment	23.7	22.7
Buildings and leasehold improvements
Property, Plant and Equipment, Net
Total property, plant and equipment	32.1	31
Office and technical equipment
Property, Plant and Equipment, Net
Total property, plant and equipment	18.9	18.7
Land
Property, Plant and Equipment, Net
Total property, plant and equipment	4.4	4.4
Construction in progress (including material inventory and other)
Property, Plant and Equipment, Net
Total property, plant and equipment	$ 34.9	$ 32.8

Asset Sales (Details)

Asset Sales (Details) $ in Millions	Nov. 01, 2021USD ($)	Sep. 01, 2021USD ($)	Dec. 31, 2021USD ($)item	Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)	Jun. 30, 2021USD ($)
Asset Sales
Number of service areas sold | item			5
Proceeds from sale of markets, net			$ 1,765.7		$ 24.7
Gain on sale of markets			1,001.3
Lease buyout			22.2	$ 10.7
Income earned under the agreement			9.5	$ 1.3	$ 3.8
Transition Services Agreement
Asset Sales
Income earned under the agreement			$ 8.5
Astound broadband markets | Discontinued Operations, Disposed of by sale
Asset Sales
Consideration	$ 661					$ 661
Proceeds from sale of markets, net	653.2
Gain on sale of markets	$ 311.5
Atlantic broadband markets | Discontinued Operations, Disposed of by sale
Asset Sales
Consideration		$ 1,125				$ 1,125
Proceeds from sale of markets, net		1,100
Gain on sale of markets		$ 689.8
Atlantic | Transition Services Agreement
Asset Sales
Agreement term		1 year
Astound Broadband | Transition Services Agreement
Asset Sales
Agreement term	12 months

Leases - Financing leases (Deta

Leases - Financing leases (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Property, Plant and Equipment, Net
Property, plant and equipment, net	$ 722.3	$ 720.9
Finance lease obligations, Current	$ 10.2
Finance Lease, Liability, Current, Statement of Financial Position [Extensible List]	Long-term Debt and Capital Lease Obligations, Current
Finance lease obligations, Noncurrent	$ 12.1
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	Long-term Debt and Capital Lease Obligations.
Finance leased assets
Property, Plant and Equipment, Net
Property, plant and equipment, net	$ 22.7

Leases - Lease cost components

Leases - Lease cost components (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Lease cost components
Amortization of leased asset	$ 10.1	$ 7.6
Interest on lease liabilities	1.1	1.2
Operating lease cost	8	8
Sublease Income	(0.5)
Net lease cost	18.7	16.8
Short-term lease and variable lease costs	$ 1.2	$ 1.1

Leases - Aggregate lease maturi

Leases - Aggregate lease maturities (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Finance Leases
First year	$ 10.9	$ 15.5
Second year	7.7	11.8
Third year	3.8	5.8
Fourth year	0.7	1.3
Fifth year	0.3	0.4
Total lease payments, Finance leases	23.4	34.8
Less: Interest	1.1	1.9
Present value of lease liabilities	22.3	32.9
Operating Leases
First year	6	7.1
Second year	5	6.4
Third year	4	4.9
Fourth year	2.7	3.9
Fifth year	1.8	2.6
Thereafter	2.1	3.9
Total lease payments, Operating leases	21.6	28.8
Less: Interest	2.7	4
Present value of lease liabilities	$ 18.9	$ 24.8
Operating Lease, Liability, Statement of Financial Position	Current portion of long-term lease liability-operating, Long-term lease liability-operating	Current portion of long-term lease liability-operating, Long-term lease liability-operating
Total Finance and Operating Leases
First year	$ 16.9	$ 22.6
Second year	12.7	18.2
Third year	7.8	10.7
Fourth year	3.4	5.2
Fifth year	2.1	3
Thereafter	2.1	3.9
Total lease payments	45	63.6
Less: Interest	3.8	5.9
Present value of lease liabilities	$ 41.2	$ 57.7
Finance Lease, Liability, Statement of Financial Position	Long-term debt and finance lease obligations, net of debt issuance costs -less current portion, Current portion of long-term debt and finance lease obligations	Long-term debt and finance lease obligations, net of debt issuance costs -less current portion, Current portion of long-term debt and finance lease obligations

Leases - Weighted average remai

Leases - Weighted average remaining lease term and discount (Details)	Dec. 31, 2021	Dec. 31, 2020
Leases
Weighted-average remaining lease term - Finance Leases	2 years 6 months	2 years 7 months 6 days
Weighted-average remaining lease term - Operating Leases	4 years 6 months	5 years
Weighted-average discount rate - Finance Leases	4.02%	4.49%
Weighted-average discount rate - Operating Leases	5.75%	5.96%

Leases - Other information (Det

Leases - Other information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Cash paid for amounts included in measurement of lease liabilities:
Operating cash flows from operating leases	$ 6.4	$ 6.6
Operating cash flows from finance leases	1.1	1.2
Financing cash flows from finance leases	22.2	10.7
Right-of-use assets obtained in exchange for lease obligations: Finance leases	11.5	20.5
Right-of-use assets obtained in exchange for lease obligations: Operating leases	$ 1	$ 5.8

Franchise Operating Rights & _3

Franchise Operating Rights & Goodwill - Franchise Operating Rights and Goodwill (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Franchise operating rights
Balance at the beginning of the period	$ 620.1	$ 634.1
Impairment		(14)	$ (9.7)
Balance at the end of the period	620.1	620.1	634.1
Goodwill
Balance at the beginning of the period	225.1	225.1
Impairment	0	0	0
Balance at the end of the period	225.1	225.1	225.1
Franchise operating rights and goodwill
Balance at the beginning of the period	845.2	859.2
Impairment		(14)	(9.7)
Balance at the end of the period	$ 845.2	$ 845.2	$ 859.2

Franchise Operating Rights & _4

Franchise Operating Rights & Goodwill - Impairment (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Franchise operating rights
Impairment of franchise operating rights		$ 14	$ 9.7
Goodwill
Impairment of goodwill	$ 0	0	$ 0
Accumulated impairment	$ 193.9	$ 193.9

Intangible Assets Subject to _3

Intangible Assets Subject to Amortization - Finite-Lived Intangible Assets (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Intangible Assets Subject to Amortization
Balance at the beginning of the period	$ 1.9	$ 2.7
Acquisitions		0.1
Amortization	(0.4)	(0.9)	$ (1.8)
Balance at the end of the period	1.7	1.9	2.7
Customer relationships
Intangible Assets Subject to Amortization
Balance at the beginning of the period		0.4
Acquisitions		0.1
Amortization		(0.5)
Balance at the end of the period			0.4
Other
Intangible Assets Subject to Amortization
Balance at the beginning of the period	1.9	2.3
Acquisitions	0.2
Amortization	(0.4)	(0.4)
Balance at the end of the period	$ 1.7	$ 1.9	$ 2.3

Intangible Assets Subject to _4

Intangible Assets Subject to Amortization - Amortization Expense (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Intangible Assets Subject to Amortization
Amortization expense	$ 0.4	$ 0.9	$ 1.8
Amortization of the intangible assets
2022	0.4
2023	0.4
2024	0.3
2025	0.2
2026	0.2
Thereafter	0.2
Total	$ 1.7	$ 1.9	$ 2.7

Accrued Liabilities and Other_2

Accrued Liabilities and Other (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Accrued Liabilities and Other
Property, income, sales and use taxes	$ 132.7	$ 5.6
Payroll and employee benefits	29.6	28
Programming costs	19.3	19.7
Customer cash collections (Transition Services Agreements)	17.5
Other accrued liabilities	9.5	8.2
Franchise and revenue sharing fees	7.9	7.1
Utility pole costs	2.2	1.7
Interest rate swaps		9.4
Accrued liabilities and other	$ 218.7	$ 79.7

Long-Term Debt and Finance Le_3

Long-Term Debt and Finance Leases - Summary (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Long-Term Debt and Capital Leases
Available borrowing capacity	$ 250
Long-term debt	724.2	$ 2,237.9
Other Financing	0.4	0.8
Finance lease obligations	22.3	32.9
Total long-term debt, finance lease obligations and other	746.9	2,271.6
Debt issuance costs, net	(5.5)	(5.6)
Sub-total	741.4	2,266
Less current portion	(17.9)	(37.5)
Long-term portion	$ 723.5	2,228.5
Term B Loans
Long-Term Debt and Capital Leases
Effective interest rate (as a percent)	3.50%
Long-term debt	$ 724.2	2,199.9
Debt issuance costs, net	(4.1)	(4.4)
Net discount	5.8	6.1
Revolving Credit Facility
Long-Term Debt and Capital Leases
Available borrowing capacity	$ 250
Effective interest rate (as a percent)	0.00%
Long-term debt		38
Debt issuance costs, net	$ (1.4)	$ (1.2)

Long-Term Debt and Finance Le_4

Long-Term Debt and Finance Leases - Term B Loans and Revolving Credit Facility (Details) - USD ($) $ in Millions	Dec. 20, 2021	Jul. 17, 2017	Dec. 31, 2021
Long-Term Debt and Capital Leases
Loss on debt extinguishment			$ 3.2
Term B Loans
Long-Term Debt and Capital Leases
Debt issued	$ 730
Term B Loans | SOFR
Long-Term Debt and Capital Leases
Spread on variable rate (as a percent)	3.00%
Floor rate (as a percent)	0.50%
Term B Loans | Alternate base rate
Long-Term Debt and Capital Leases
Spread on variable rate (as a percent)		2.25%
Term B Loans | Adjusted LIBOR rate
Long-Term Debt and Capital Leases
Spread on variable rate (as a percent)		3.25%
Revolving Credit Facility
Long-Term Debt and Capital Leases
Maximum borrowing capacity	$ 250
Commitment fee rate for unused commitments	0.50%
Revolving Credit Facility | Letters of credit
Long-Term Debt and Capital Leases
Maximum borrowing capacity			20
Outstanding letters of credit			$ 5.3
Revolving Credit Facility | SOFR
Long-Term Debt and Capital Leases
Spread on variable rate (as a percent)	2.75%
Revolving Credit Facility | Alternate base rate
Long-Term Debt and Capital Leases
Spread on variable rate (as a percent)		2.00%
Revolving Credit Facility | Adjusted LIBOR rate
Long-Term Debt and Capital Leases
Spread on variable rate (as a percent)		3.00%

Long-Term Debt and Finance Le_5

Long-Term Debt and Finance Lease Obligations - Amortization of Debt Issuance Costs and Debt Maturities (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Amortization of debt issue costs and accretion of debt discount
Amortization of deferred issuance costs	$ 2.4	$ 2.4	$ 2.4
Accretion of debt discount	2.3	$ 2.3	$ 2.3
Maturities of long-term debt, excluding finance lease obligations
2022	7.3
2023	7.3
2024	7.3
2025	7.3
2026	7.3
Thereafter	693.5
Total principal maturities of long-term debt	$ 730

Derivative Instruments and He_3

Derivative Instruments and Hedging Activities - Notional amounts and fair value (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020	May 09, 2018
Derivatives
Derivative current liabilities, fair value		$ 9.4
Interest rate swaps | Cash flow hedging
Derivatives
Notional amount		1,323.5	$ 1,361.2
Interest rate swaps | Cash flow hedging | Accrued Liabilities and Other
Derivatives
Derivative current liabilities, fair value	$ 0	$ 9.4

Derivative Instruments and He_4

Derivative Instruments and Hedging Activities - Gains and losses on derivatives (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Gains and losses on derivatives
Gain (loss) recorded in AOCL on derivatives, net	$ 6.5	$ 9	$ (9)
Cash flow hedging | Interest rate swaps
Gains and losses on derivatives
Gain (loss) recorded in AOCL on derivatives, before tax	8.5	11.8
Tax impact	(2)	(2.8)
Gain (loss) recorded in AOCL on derivatives, net	6.5	9
Cash flow hedging | Interest rate swaps | Interest expense
Gains and losses on derivatives
Gain (loss) on derivatives	$ (9.5)	$ (21.2)	$ (6.2)

Fair Value Measurements (Detail

Fair Value Measurements (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Financial instruments and financial liabilities
Transfer of assets from level 1 to level 2	$ 0	$ 0
Transfer of assets from level 2 to level 1	0	0
Transfer of liabilities from level 1 to level 2	0	0
Transfer of liabilities from level 2 to level 1	0	0
Transfer of assets into level 3	0	0
Transfer of assets out of level 3	0	0
Transfer of liabilities into level 3	0	0
Transfer of liabilities out of level 3	$ 0	$ 0
Recurring
Financial instruments and financial liabilities
Derivative Liability, Fair Value by Fair Value Hierarchy Level		us-gaap:FairValueInputsLevel2Member
Derivative liability		$ 9.4
Long-Term Debt, Fair Value by Fair Value Hierarchy Level	us-gaap:FairValueInputsLevel2Member	us-gaap:FairValueInputsLevel2Member
Long-term debt	$ 729.1	$ 2,203.1

Stock-Based Compensation - 2017

Stock-Based Compensation - 2017 Plan (Details) $ in Millions	12 Months Ended
	Dec. 31, 2021USD ($)shares
Stock Based Compensation
Number of authorized shares | shares	12,074,128
Restricted stock awards
Stock Based Compensation
Vesting period	4 years
Non-cash compensation expense | $	$ 0.6

Stock-Based Compensation - Expe

Stock-Based Compensation - Expense (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Stock-Based Compensation
Unrecognized non-cash compensation expense	$ 31.9
Weighted-average period	2 years 2 months 12 days
Selling, general and administrative expense and operating expenses (excluding depreciation and amortization)
Stock-Based Compensation
Non-cash compensation expense	$ 15.3	$ 11.1	$ 10.1

Stock-Based Compensation - Rest

Stock-Based Compensation - Restricted Stock Activity (Details) - Restricted stock awards - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Restricted Stock Awards
Outstanding, beginning of period (in shares)	4,990,971	3,140,168	2,356,418
Granted (in shares)	1,422,358	3,585,929	2,075,455
Vested (in shares)	(1,704,596)	(1,154,151)	(825,764)
Forfeited (in shares)	(383,609)	(580,975)	(465,941)
Outstanding, end of period (in shares)	4,325,124	4,990,971	3,140,168
Weighted Average Grant Price
Outstanding, beginning of period (in dollars per share)	$ 5.71	$ 8.56	$ 9.23
Granted (in dollars per share)	17.17	4.44	8.41
Vested ( in dollars per share )	6.23	8.87	9.84
Forfeited ( in dollars per share )	7.71	7.05	9.01
Outstanding, end of period (in dollars per share)	$ 9.10	$ 5.71	$ 8.56
Additional information
Fair value of restricted shares vested	$ 28.9	$ 5	$ 6.9

Stock-Based Compensation - Perf

Stock-Based Compensation - Performance Shares (Details) $ / shares in Units, $ in Millions	Mar. 03, 2021$ / sharesshares	Dec. 31, 2021USD ($)	Dec. 31, 2021item
Fair value assumptions
Number of service areas sold | item			5
Performance shares
Stock Based Compensation
Granted (in shares) | shares	209,621
Fair value assumptions
Amount reversed of previously recognized stock compensation expense | $		$ 1
Performance shares | Share-based Payment Arrangement, Tranche One, TSR
Stock Based Compensation
Vesting (as a percent)	50.00%
Grant date fair value (in dollars per share) | $ / shares	$ 27.76
Fair value assumptions
Risk-free interest rate (as a percent)	0.26%
Expected volatility (as a percent)	59.77%
Expected life	3 years
Performance shares | Share-based Payment Arrangement, Tranche Two, EBITDA metric
Stock Based Compensation
Vesting (as a percent)	50.00%
Vesting period	3 years
Performance shares | Minimum
Stock Based Compensation
Percentage of target shares that may be earned upon achievement of threshold performance metric	50.00%
Performance shares | Maximum
Stock Based Compensation
Percentage of target shares that may be earned upon achievement of threshold performance metric	200.00%

Income Taxes - Income tax benef

Income Taxes - Income tax benefit (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Jun. 30, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Current tax (expense) benefit
State		$ (1.6)	$ (1.9)	$ 3.1
Total current tax		(1.6)	(1.9)	3.1
Deferred tax (expense) benefit
Federal		22.2	34.2	25.5
State		(6.8)	(1.7)	5.3
Total deferred tax		15.4	32.5	30.8
Income tax (expense) benefit, net		13.8	30.6	33.9
Total income tax expense		$ 292.9	$ 7.8	$ 1.5
Refund received of remaining amount of refundable Alternative Minimum Tax carryforwards	$ 4.4

Income Taxes - Reconciliation o

Income Taxes - Reconciliation of Income Tax Provision (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Reconciliation of the income tax provision computed at statutory tax rates to the income tax provision
Statutory federal income taxes	$ 17.3	$ 29.2	$ 24.5
State income taxes	0.6	4.8	0.8
Tax status change & other true-ups	0.1	0.8	0.9
Other true-ups	0.3	(2.5)	0.8
Equity compensation	3.8	(1)	(0.3)
Other permanent differences	(2.4)	(0.4)	(0.4)
Research and development tax credits	2.5	2.2
Uncertain tax positions	(0.1)	(0.2)	3.7
Change in valuation allowance	(8.3)	(2.3)	3.9
Income tax (expense) benefit, net	$ 13.8	$ 30.6	$ 33.9

Income Taxes - Deferred Income

Income Taxes - Deferred Income Taxes, Net (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Deferred tax assets
Allowances and other reserves	$ 2.2	$ 6.3
Net operating loss carryforwards	82.1	223.1
Research and development tax credits		4.1
Interest hedging		2
Other	1	1.4
Total deferred tax assets	85.3	236.9
Less: valuation allowance	(35.5)	(30.8)
Deferred tax asset	49.8	206.1
Deferred tax liabilities
Depreciation and amortization	(145.8)	(206.3)
Franchise operating rights	(161.5)	(198.6)
Debt issuance costs		(1.8)
Total deferred tax liabilities	(307.3)	(406.7)
Net deferred tax liabilities	$ (257.5)	$ (200.6)

Income Taxes - Valuation allowa

Income Taxes - Valuation allowance (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Income Taxes
Valuation allowance	$ 35.5	$ 30.8

Income Taxes - NOLs (Details)

Income Taxes - NOLs (Details) $ in Millions	12 Months Ended
	Dec. 31, 2021USD ($)
Federal
Income Taxes
Net operating loss carryforwards	$ 197.7
Net operating losses subject to Section 382 and other restrictions	197.7
State
Income Taxes
Net operating loss carryforwards	897.3
Net operating loss carryforward, Indefinite lived	237.2
Net operating loss carryforward subject to expiration	$ 660.1

Income Taxes - Uncertain tax po

Income Taxes - Uncertain tax positions (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Taxes
Unrecognized tax benefits at the beginning of year	$ 13.7	$ 11.4	$ 28
Gross increases - tax positions in prior period		0.7
Gross decreases - tax positions in prior period	(0.7)		(12.8)
Gross increases - tax positions in current period	1.2	1.6
Settlements			(3.8)
Unrecognized tax benefits	14.2	13.7	11.4
Unrecognized tax benefits, if recognized, would affect effective tax rate	14.2
Accrued gross interest and penalties	1.4	$ 1.2	$ 1
Unrecognized tax benefits that could reverse in the next twelve months	2.7
Interest accrued on uncertain income tax positions that could reverse in the next twelve months	$ 1.4

Earnings (Loss) per Common Sh_3

Earnings (Loss) per Common Share (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Earnings (Loss) per Common Share
Loss from continuing operations, basic	$ (68.6)	$ (108.3)	$ (82.4)
Loss from continuing operations, diluted	(68.6)	(108.3)	(82.4)
Income from discontinued operations, basic	839.1	122.7	118.8
Income from discontinued operations, diluted	839.1	122.7	118.8
Net income, basic	770.5	14.4	36.4
Net income, diluted	$ 770.5	$ 14.4	$ 36.4
Basic weighted-average shares	82,720,934	81,561,707	80,713,926
Diluted weighted-average shares	82,720,934	81,561,707	80,713,926
Basic and diluted (loss) per common share - continuing operations
Basic (in dollars per share)	$ (0.83)	$ (1.33)	$ (1.02)
Diluted (in dollars per share)	(0.83)	(1.33)	(1.02)
Basic and diluted earnings per common share - discontinued operations
Basic (in dollars per share)	10.14	1.51	1.47
Diluted (in dollars per share)	10.14	1.51	1.47
Basic and diluted earnings per common share
Basic (in dollars per share)	9.31	0.18	0.45
Diluted (in dollars per share)	$ 9.31	$ 0.18	$ 0.45

Employee Benefits - 401(k) (Det

Employee Benefits - 401(k) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
401(k) Savings Plan
Annual vesting percentage of Company matching contribution	25.00%
Vesting period	4 years
Expense related to the matching contributions to the 401(k) plan	$ 3.2	$ 3	$ 3.2
First 3% of employee contributions
401(k) Savings Plan
Employer contribution subject to first 4% of the participant's compensation (as a percent)	100.00%
Percentage of participant's gross pay for which the employer contributes a matching contribution (as a percent)	3.00%
Next 2% of employee contributions
401(k) Savings Plan
Employer contribution subject to first 4% of the participant's compensation (as a percent)	50.00%
Percentage of participant's gross pay for which the employer contributes a matching contribution (as a percent)	2.00%
Next 2% of employee contributions | Maximum
401(k) Savings Plan
Percentage of participant's gross pay for which the employer contributes a matching contribution (as a percent)	4.00%

Employee Benefits - Deferred Co

Employee Benefits - Deferred Compensation Plan (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Assets and liabilities of the plan included in the Consolidated Balance Sheets
Prepaid expenses and other (current assets)	$ 1.9	$ 1.7
Accrued liabilities and other (current liabilities)	$ 1.9	$ 1.7

Commitments and Contingencies -

Commitments and Contingencies - PP&E Capital Leases and Rental Expense (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Commitments and contingencies
Rent expense for pole rental	$ 6.1	$ 5.2	$ 5.1
Franchise fees and other franchise related costs	$ 11.8	$ 13.5	$ 14.3
Minimum
Commitments and contingencies
Term of contract for licensing programming content	3 years
Maximum
Commitments and contingencies
Term of contract for licensing programming content	5 years

Commitments and Contingencies_2

Commitments and Contingencies - Legal (Details) - IPO Shareholder Class Action	Dec. 31, 2021item
Commitments and contingencies
Number of plaintiff firms	4
Number of lawsuits	5
New York
Commitments and contingencies
Number of actions filed that have been consolidated	3
Colorado
Commitments and contingencies
Number of lawsuits	2