Consolidated Balance Sheets (Parenthetical) (USD $)	Sep. 30, 2013	Dec. 31, 2012
Preferred shares, par value	$ 0.01	$ 0.01
Preferred shares, authorized	250,000,000	250,000,000
Preferred shares, issued
Common shares, par value	$ 0.01	$ 0.01
Common shares, authorized	500,000,000	500,000,000
Common shares, issued	230,147,557	225,480,172
Common shares, outstanding	230,147,557	225,480,172

Face amount or stated value per share of common stock.

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