Consolidated Balance Sheets (Unaudited) (Parenthetical) (Common Shares, USD $)	Jun. 30, 2014	Dec. 31, 2013
Common Shares
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	490,000,000	490,000,000
Common stock, shares outstanding	42,615,331	40,512,563