CONVERTIBLE REDEEMABLE PREFERRED SHARES (Notes)	12 Months Ended
Dec. 31, 2018
Temporary Equity Disclosure [Abstract]
CONVERTIBLE REDEEMABLE PREFERRED SHARES	12. CONVERTIBLE REDEEMABLE PREFERRED SHARES 200,000 shares of our Series B Convertible Redeemable Preferred Stock, par value US$ 0.08 per share (the “Series B Preferred Shares”) were issued and outstanding as at December 31, 2018 and 2017. The Series B Preferred Shares are held by Time Warner Media Holdings B.V. ("TW Investor"), a wholly owned subsidiary of AT&T. As at December 31, 2018 and 2017, the accreted value of the Series B Preferred Shares was US$ 269.4 million and US$ 264.6 million, respectively. The stated value of the Series B Preferred Shares of US$ 1,000 per share accreted at an annual rate of 3.75%, compounded quarterly, from June 25, 2016 until June 24, 2018. The Series B Preferred Shares will not accrete further. As of December 31, 2018, the 200,000 shares of Series B preferred stock were convertible into approximately 111.1 million shares of Class A common stock. Each Series B Preferred Share may, at the holder's option, be converted into the number of shares of our Class A common stock determined by dividing (i) the accreted stated value plus accrued but unpaid dividends, if any, in each case as of the conversion date, by (ii) the conversion price, which was approximately US$ 2.42 at December 31, 2018, but is subject to adjustment from time to time pursuant to customary weighted-average anti-dilution provisions with respect to our issuances of equity or equity-linked securities at a price below the then-applicable conversion price (excluding any securities issued under our benefit plans at or above fair market value). We have the right to redeem the Series B Preferred Shares in whole or in part upon 30 days' written notice. The redemption price of each outstanding Series B Preferred Share is equal to its accreted stated value plus accrued but unpaid dividends, if any, in each case as of the redemption date specified in the redemption notice. After receipt of a redemption notice, each holder of Series B Preferred Shares will have the right to convert, prior to the date of redemption, all or part of such Series B Preferred Shares to be redeemed by us into shares of our Class A common stock in accordance with the terms of conversion described above. Holders of the Series B Preferred Shares have no voting rights on any matter presented to holders of any class of our capital stock, with the exception that they may vote with holders of shares of our Class A common stock (i) with respect to a change of control event or (ii) as provided by our Bye-laws or applicable Bermuda law. Holders of Series B Preferred Shares will participate in any dividends declared or paid on our Class A common stock on an as-converted basis. The Series B Preferred Shares will rank pari passu with our Series A Convertible Preferred Stock and senior to all other equity securities of the Company in respect of payment of dividends and distribution of assets upon liquidation. The Series B Preferred Shares have such other rights, powers and preferences as are set forth in the Certificate of Designation for the Series B Preferred Shares. The Series B Preferred Shares are not considered a liability and the embedded conversion feature does not require bifurcation. The Series B Preferred Shares are classified outside of permanent equity at redemption value. For the years ended December 31, 2018, 2017 and 2016, we recognized accretion on the Series B Preferred Shares of US$ 4.8 million, US$ 9.7 million and US$ 13.7 million, respectively, with corresponding decreases in additional paid-in capital.

12. CONVERTIBLE REDEEMABLE PREFERRED SHARES

200,000 shares of our Series B Convertible Redeemable Preferred Stock, par value US$ 0.08 per share (the “Series B Preferred Shares”) were issued and outstanding as at December 31, 2018 and 2017. The Series B Preferred Shares are held by Time Warner Media Holdings B.V. ("TW Investor"), a wholly owned subsidiary of AT&T. As at December 31, 2018 and 2017, the accreted value of the Series B Preferred Shares was US$ 269.4 million and US$ 264.6 million, respectively. The stated value of the Series B Preferred Shares of US$ 1,000 per share accreted at an annual rate of 3.75%, compounded quarterly, from June 25, 2016 until June 24, 2018. The Series B Preferred Shares will not accrete further. As of December 31, 2018, the 200,000 shares of Series B preferred stock were convertible into approximately 111.1 million shares of Class A common stock.

Each Series B Preferred Share may, at the holder's option, be converted into the number of shares of our Class A common stock determined by dividing (i) the accreted stated value plus accrued but unpaid dividends, if any, in each case as of the conversion date, by (ii) the conversion price, which was approximately US$ 2.42 at December 31, 2018, but is subject to adjustment from time to time pursuant to customary weighted-average anti-dilution provisions with respect to our issuances of equity or equity-linked securities at a price below the then-applicable conversion price (excluding any securities issued under our benefit plans at or above fair market value). We have the right to redeem the Series B Preferred Shares in whole or in part upon 30 days' written notice. The redemption price of each outstanding Series B Preferred Share is equal to its accreted stated value plus accrued but unpaid dividends, if any, in each case as of the redemption date specified in the redemption notice. After receipt of a redemption notice, each holder of Series B Preferred Shares will have the right to convert, prior to the date of redemption, all or part of such Series B Preferred Shares to be redeemed by us into shares of our Class A common stock in accordance with the terms of conversion described above.

Holders of the Series B Preferred Shares have no voting rights on any matter presented to holders of any class of our capital stock, with the exception that they may vote with holders of shares of our Class A common stock (i) with respect to a change of control event or (ii) as provided by our Bye-laws or applicable Bermuda law. Holders of Series B Preferred Shares will participate in any dividends declared or paid on our Class A common stock on an as-converted basis. The Series B Preferred Shares will rank pari passu with our Series A Convertible Preferred Stock and senior to all other equity securities of the Company in respect of payment of dividends and distribution of assets upon liquidation. The Series B Preferred Shares have such other rights, powers and preferences as are set forth in the Certificate of Designation for the Series B Preferred Shares.

The Series B Preferred Shares are not considered a liability and the embedded conversion feature does not require bifurcation. The Series B Preferred Shares are classified outside of permanent equity at redemption value. For the years ended December 31, 2018, 2017 and 2016, we recognized accretion on the Series B Preferred Shares of US$ 4.8 million, US$ 9.7 million and US$ 13.7 million, respectively, with corresponding decreases in additional paid-in capital.