DERIVATIVES (NOTIONAL TABLE) (Details) ₱ in Thousands, $ in Thousands, $ in Thousands	Jun. 30, 2018 PHP (₱)	Jun. 30, 2018 MXN ($)	Jun. 30, 2018 USD ($)	Dec. 31, 2017 PHP (₱)	Dec. 31, 2017 MXN ($)	Dec. 31, 2017 USD ($)
Derivative [Line Items]
Notional Amount			$ 217,400			$ 176,200
Foreign Exchange Forward
Derivative [Line Items]
Notional Amount			235,138			313,506
Foreign Exchange Forward | PHP
Derivative [Line Items]
Notional Amount	₱ 8,138,750		$ 162,746	₱ 10,685,000		219,917
% Maturing in the Next 12 Months	61.20%	61.20%	61.20%
Foreign Exchange Forward | MXN
Derivative [Line Items]
Notional Amount		$ 1,279,000	$ 72,392		$ 1,609,000	$ 93,589
% Maturing in the Next 12 Months	50.20%	50.20%	50.20%