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Amount of paid and unpaid cash dividends declared for classes of stock, for example, but not limited to, common and preferred.

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Carrying amount of the unpaid portion of the fee payable to the managing member or general partner for management of the fund or trust.

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The cash outflow to reacquire common stock during the period.

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Amount of cash outflow to acquire investments classified as other.

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Expenses recognized resulting from transactions (excluding transactions that are eliminated in consolidated or combined financial statements) with related party.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

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Gross number of share options (or share units) granted during the period.

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Number of shares that have been repurchased during the period and are being held in treasury.

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AFFILIATE AND RELATED PARTY TRANSACTIONS - Amounts Due From and Due to Related Parties (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Related Party Transaction [Line Items]
Treasury Stock, Shares, Acquired			10,457,772	0
Payments for Repurchase of Common Stock			$ 1,686,873	$ 500,000	$ 0
Related party expense			15,961	21,444	640,344
Cash distributions to shareholders	$ 839,700			1,499,935	840,035	$ 445,176
Cash distributions		$ 79,617	$ 0	$ 1,499,935	919,317	$ 365,559
Stock options \| 2017 LTIP
Related Party Transaction [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross			3,677,076	6,753,659
Vesting period			4 years
Share based compensation expense			$ 44,464	$ 18,491	0
Stock options \| 2017 LTIP \| Tranche One
Related Party Transaction [Line Items]
Award vesting percentage			50.00%
Stock options \| 2017 LTIP \| Tranche Two
Related Party Transaction [Line Items]
Award vesting percentage			25.00%
Stock options \| 2017 LTIP \| Tranche Three
Related Party Transaction [Line Items]
Award vesting percentage			25.00%
Restricted Stock \| 2019 LTIP [Member]
Related Party Transaction [Line Items]
Vesting period			4 years
Deferred Compensation Arrangement with Individual, Fair Value of Shares Issued			$ 27,013
Share based compensation expense			$ 6,459
Restricted Stock \| 2019 LTIP [Member] \| Tranche One
Related Party Transaction [Line Items]
Award vesting percentage			50.00%
Restricted Stock \| 2019 LTIP [Member] \| Tranche Two
Related Party Transaction [Line Items]
Award vesting percentage			25.00%
Restricted Stock \| 2019 LTIP [Member] \| Tranche Three
Related Party Transaction [Line Items]
Award vesting percentage			25.00%
CSC Holdings
Related Party Transaction [Line Items]
Related party expense			$ 15,961	19,164	29,720
Cash distributions to shareholders				3,058,747	2,777,498
Cash distributions			2,279,472	3,058,750	2,777,497
Altice N.V.
Related Party Transaction [Line Items]
Management advisory and consulting fee					30,000
Affiliates
Related Party Transaction [Line Items]
Due from related parties and affiliates			6,774	17,557
Due to related parties and affiliates			7,456	26,096
Affiliates \| CSC Holdings
Related Party Transaction [Line Items]
Due from related parties and affiliates			6,774	4,385
Due to related parties and affiliates			7,456	179,417
Affiliates \| Altice Management Americas
Related Party Transaction [Line Items]
Due from related parties and affiliates			4,076	16,995
Affiliates \| Altice Management Americas \| CSC Holdings
Related Party Transaction [Line Items]
Due from related parties and affiliates			4,076	3,821
Affiliates \| Other Related Party
Related Party Transaction [Line Items]
Due from related parties and affiliates			2,698	562
Affiliates \| Other Related Party \| CSC Holdings
Related Party Transaction [Line Items]
Due from related parties and affiliates			2,698	564
Due to related parties and affiliates			7,456	22
Affiliates \| Altice Management International
Related Party Transaction [Line Items]
Due to related parties and affiliates			0	26,074
Affiliates \| Altice Management International \| CSC Holdings
Related Party Transaction [Line Items]
Due to related parties and affiliates			0	12,419
Affiliates \| Altice USA \| CSC Holdings
Related Party Transaction [Line Items]
Due to related parties and affiliates			0	26,578
Affiliates \| Cablevision Systems Corp. \| CSC Holdings
Related Party Transaction [Line Items]
Due to related parties and affiliates			$ 0	140,398
Altice Management International \| Equipment Purchase Costs
Related Party Transaction [Line Items]
Capital expenditures					22,012
Related Party performing advisory services [Member] \| Stock options \| 2017 LTIP
Related Party Transaction [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross			370,923
Deferred Compensation Arrangement with Individual, Fair Value of Shares Issued			$ 3,516
Suddenvision S.A.R.L. [Member]
Related Party Transaction [Line Items]
Treasury Stock, Shares, Acquired			14,900,000
Payments for Repurchase of Common Stock			$ 350,000
Fees for Executive Services
Related Party Transaction [Line Items]
Related party expense				13,250	30,000
Transition Services
Related Party Transaction [Line Items]
Other operating expenses, charges for related party services			$ 8,355	$ 3,057	4,057
Newsday
Related Party Transaction [Line Items]
Other operating expenses, charges for related party services					$ 917