Quarterly report pursuant to Section 13 or 15(d)

Consolidated Statements of Equity (Parenthetical)

Consolidated Statements of Equity (Parenthetical) - shares
3 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Balance (in units/ shares) 94,661,381 94,536,269
Conversion of common units to common shares (in units/ shares) 0 158,000
Exercise of share options (in units/shares)   70,374
Share-based compensation issuance, net of redemptions (in units/shares) 129,869 162,370
Common Shares    
Issuance of common units resulting from common shares issued under at-the-market program (in units)   890,241