Note 24—Earnings (Loss) Per Common Share

The Company determines earnings (loss) per Common Share using the two-class method. Under the two-class method, all earnings (distributed and undistributed) are allocated to Common Shares and participating securities based on their respective rights to receive dividends. The Company’s participating securities are certain grants of restricted share units that provide the recipients the nonforfeitable right to receive dividend equivalents during the vesting period on a basis equivalent to the dividends paid to holders of Common Shares.

Basic earnings per share is determined by dividing net income available to common shareholders (net income reduced by preferred dividends and income attributable to the participating securities) by the weighted average Common Shares outstanding during the period.

Diluted earnings per share is determined by dividing net income by the weighted average number of Common Shares and dilutive securities. The Company’s potentially dilutive securities are share-based compensation awards and the exchangeable senior notes described in Note 15— Long-Term Debt. The number of dilutive securities included in diluted earnings per share is calculated using either the treasury stock or if-converted method (whichever is most dilutive) for share-based compensation awards and the if-converted method for the exchangeable senior notes. The number of potentially dilutive securities relating to the exchangeable senior notes is calculated based on the exchange obligation in excess of the principal amount of the exchangeable senior notes as described in Note 15— Long-Term Debt.

Calculation of diluted earnings per share requires certain potentially dilutive shares to be excluded when the inclusion of such shares would be anti-dilutive. The following table summarizes the potentially dilutive shares excluded from the diluted earnings per share calculation: