EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Income from continuing operations		$ 21,325	$ 25,265	$ 27,409	$ 19,283
Net loss attributable to noncontrolling interests		16	137	194	346
Less: preferred share accretion paid in kind (Note 13)		(2,330)	(2,405)	(4,777)	(4,762)
Less: income allocated to Series B Preferred Shares		(6,084)	(9,347)	(8,192)	(6,037)
Income from continuing operations available to common shareholders, net of noncontrolling interest		12,927	13,650	14,634	8,830
Income / (loss) from discontinued operations, net of tax (Note 3)		4,700	2,533	5,688	(2,759)
Net income attributable to CME Ltd. available to common shareholders — basic		16,123	15,153	18,281	7,191
Net income attributable to CME Ltd. available to common shareholders — diluted		$ 16,608	$ 17,583	$ 19,805	$ 8,294
Weighted average outstanding shares of common stock - basic (in shares)	[1]	235,148,000	155,738,000	196,807,000	155,269,000
Dilutive effect of common stock warrants, employee stock options and RSUs (in shares)		23,635,000	80,214,000	53,708,000	75,603,000
Weighted average outstanding shares of common stock - diluted (in shares)		258,783,000	235,952,000	250,515,000	230,872,000
Net income / (loss) per share:
Continuing operations — basic		$ 0.05	$ 0.09	$ 0.07	$ 0.06
Continuing operations — diluted		0.05	0.07	0.06	0.04
Discontinued operations — basic		0.02	0.01	0.02	(0.01)
Discontinued operations — diluted		0.01	0.00	0.02	0.00
Net income attributable to CME Ltd. — basic		0.07	0.10	0.09	0.05
Net income attributable to CME Ltd. — diluted		$ 0.06	$ 0.07	$ 0.08	$ 0.04
Series B Preferred Shares
Dilutive effect of Series B Preferred Shares		$ (485)	$ (2,430)	$ (1,524)	$ (1,103)
Common Class A [Member] | T W Investor [Member]
Net income / (loss) per share:
Incremental common shares attributable to dilutive effect of conversion of preferred stock (in shares)		11,211,449	11,211,449	11,211,449	11,211,449
Discontinued Operations, Held-for-sale [Member]
Less: income allocated to Series B Preferred Shares		$ 1,504	$ 1,030	$ 2,041	$ (1,120)

[1] (1) For the purpose of computing basic earnings per share, the 11,211,449 shares of Class A common stock underlying the Series A Preferred Share are included in the weighted average outstanding shares of common stock - basic, because the holder of the Series A Preferred Share is entitled to receive any dividends payable when dividends are declared by the Board of Directors with respect to any shares of the common stock.