Quarterly report pursuant to Section 13 or 15(d)

Consolidated Statements of Equity (Parenthetical)

v2.4.0.8
Consolidated Statements of Equity (Parenthetical)
 6 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Increase (Decrease) in Stockholders' Equity [Roll Forward]    
Balance (in shares) 80,952,986 72,011,324
Conversion of common units to common shares 279,019 54,550
Exercise of share options 32,756 12,667
Restricted common share redemptions 68,762 133,081
Balance (in shares) 85,845,403 72,084,932
Preferred Shares
    
Increase (Decrease) in Stockholders' Equity [Roll Forward]    
Shares issued to the public (in shares)   6,900,000
Stock redeemed or called during period, shares 3,390,000  
Common Shares
    
Increase (Decrease) in Stockholders' Equity [Roll Forward]    
Shares issued to the public (in shares) 4,485,000