Consolidated Statements Of Operations (Parenthetical) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Non-cash compensation expense				$ 28,894	$ 24,752
Provision for doubtful accounts	[1]			1,498	20,516
Oi S.A. [Member]
Provision for doubtful accounts					16,498
Selling, General And Administrative [Member]
Non-cash compensation expense		$ 9,213	$ 7,970	$ 28,069	24,440
Selling, General And Administrative [Member] | Oi S.A. [Member]
Provision for doubtful accounts					$ 16,498

[1] Includes the impact of the $16,498 Oi reserve for the nine months ended September 30, 2016.