EARNINGS PER SHARE (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended				12 Months Ended
	Mar. 31, 2013		Mar. 31, 2012		Dec. 31, 2012	Jul. 03, 2012 T W Investor [Member]
Net loss attributable to CME Ltd.	$ (108,280)		$ (13,392)
Weighted average outstanding shares of common stock - basic (in shares)	88,397,000	[1]	64,393,000	[1]
Dilutive effect of employee stock options and RSUs (in shares)	0		0
Weighted average outstanding shares of common stock - diluted (in shares)	88,397,000		64,393,000
Net loss per share:
Basic (in dollars per share)	$ (1.22)		$ (0.21)
Diluted (in dollars per share)	$ (1.22)		$ (0.21)
Convertible Preferred Stock, Shares Issued upon Conversion						11,211,449
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	3,059,240				3,087,087

[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, primarily 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.