AFFILIATE AND RELATED PARTY TRANSACTIONS - Amounts Due From and Due to Related Parties (Details) - Affiliates - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Related Party Transaction [Line Items]
Due from related parties and affiliates	$ 40,106	$ 22,182
Due to related parties and affiliates	21,752	127,363
Altice US Finance S.A.
Related Party Transaction [Line Items]
Due from related parties and affiliates	12,951	12,951
Newsday
Related Party Transaction [Line Items]
Due from related parties and affiliates	6,886	6,114
Due to related parties and affiliates	354	275
Altice Management Americas
Related Party Transaction [Line Items]
Due from related parties and affiliates	9,420	3,117
Altice Technical Services
Related Party Transaction [Line Items]
Due from related parties and affiliates	6,776	0
I24
Related Party Transaction [Line Items]
Due from related parties and affiliates	4,009	0
Other Related Party
Related Party Transaction [Line Items]
Due from related parties and affiliates	64	0
Due to related parties and affiliates	6,199	3,350
CVC 3BV
Related Party Transaction [Line Items]
Due to related parties and affiliates	0	71,655
Neptune Holdings US LP
Related Party Transaction [Line Items]
Due to related parties and affiliates	0	7,962
Altice Management International
Related Party Transaction [Line Items]
Due to related parties and affiliates	$ 15,199	$ 44,121