(LOSS)/EARNINGS PER SHARE (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Disclosure of classes of share capital [line items]
(Loss)/Profit for the year	$ (22,090)	$ (40,270)	$ (100,625)
Diluted earnings per share denominator	103,508,820	107,510,179	113,197,598
Diluted earnings per ordinary share for continuing operations	$ (19,006)	$ (35,728)	$ (35,536)
Adjusted (loss)/profit after tax	(18,437)	(37,337)	(97,577)
Class A Ordinary shares [Member]
Disclosure of classes of share capital [line items]
Basic earnings per ordinary share for continuing operations	22,658	38,661	38,583
American depositary share [Member]
Disclosure of classes of share capital [line items]
Basic earnings per ordinary share for continuing operations	$ 22,658	$ 38,661	$ 38,583
Diluted earnings per share denominator	25,877,205	26,877,544	28,299,399
Adjusted (loss)/profit after tax	$ 18,437	$ 37,337	$ 97,577

The weighted average number of ordinary shares outstanding plus the weighted average number of ordinary shares that would be issued on the conversion of all the dilutive potential ordinary shares into ordinary shares. [Refer: Ordinary shares [member]; Weighted average [member]]

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