CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Equity:
Preferred shares, par value (in dollars per share)	$ 0.0001	$ 0.0001
Preferred shares, authorized shares (in shares)	100,000,000	100,000,000
Common shares, par value (in dollars per share)	$ 0.0001	$ 0.0001
Common shares, authorized shares (in shares)	400,000,000	400,000,000
Common shares, shares issued (in shares)	235,940,610	233,278,037
Common shares, outstanding (in shares)	235,940,610	233,278,037
Series C [Member] | Cumulative Convertible [Member]
Equity:
Preferred shares, liquidation preference	$ 96,770	$ 96,770
Preferred shares, shares issued (in shares)	1,935,400	1,935,400
Preferred shares, shares outstanding (in shares)	1,935,400	1,935,400