DERIVATIVES (NOTIONAL TABLE) (Details) ₱ in Thousands, $ in Thousands, $ in Thousands	Mar. 31, 2018 PHP (₱)	Mar. 31, 2018 MXN ($)	Mar. 31, 2018 USD ($)	Dec. 31, 2017 PHP (₱)	Dec. 31, 2017 MXN ($)	Dec. 31, 2017 USD ($)
Derivative [Line Items]
Notional Amount			$ 180,300			$ 176,200
Foreign Exchange Forward
Derivative [Line Items]
Notional Amount			266,180			313,506
Foreign Exchange Forward | PHP
Derivative [Line Items]
Notional Amount	₱ 8,990,000		$ 183,228	₱ 10,685,000		219,917
% Maturing in the Next 12 Months	57.60%	57.60%	57.60%
Foreign Exchange Forward | MXN
Derivative [Line Items]
Notional Amount		$ 1,444,000	$ 82,952		$ 1,609,000	$ 93,589
% Maturing in the Next 12 Months	45.30%	45.30%	45.30%