EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Net income / (loss)		$ 27,798	$ (141,249)	$ 16,524	$ (181,943)
Net loss / (income) attributable to noncontrolling interests		137	(68)	346	191
Less: preferred share accretion paid in kind (Note 12)		(2,405)	(4,440)	(4,762)	(8,950)
Less: income allocated to Series B Preferred Shares		(10,376)	0	(4,917)	0
Net income / (loss) attributable to CME Ltd. available to common shareholders — basic		15,154	(145,757)	7,191	(190,702)
Net income / (loss) attributable to CME Ltd. available to common shareholders — diluted		$ 17,583	$ (145,757)	$ 8,294	$ (190,702)
Weighted average outstanding shares of common stock - basic (in shares)	[1]	155,738,000	149,083,000	155,269,000	148,080,000
Dilutive effect of employee stock options and RSUs (in shares)		80,214,000	0	75,603,000	0
Weighted average outstanding shares of common stock - diluted (in shares)		235,952,000	149,083,000	230,872,000	148,080,000
Net loss per share:
Net loss attributable to CME Ltd. – Basic (in dollars per share)		$ 0.10	$ (0.98)	$ 0.05	$ (1.29)
Net loss attributable to CME Ltd. – Diluted (in dollars per share)		$ 0.07	$ (0.98)	$ 0.04	$ (1.29)
Antidilutive securities excluded from computation of earnings per share				1,109,222	106,510,057
Series B Preferred Stock [Member]
[Dilutive effect of common stock warrants, employee stock options and RSUs]		$ (2,429)	$ 0	$ (1,103)	$ 0
Common Class A [Member] | T W Investor [Member]
Net 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

[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 common stock.