Note 2. Earnings Per Share

Basic earnings per share is computed by dividing net income by the daily weighted average number of shares of our common stock outstanding for the period, excluding unvested restricted stock. Unvested restricted stock is included in common shares outstanding on our Condensed Balance Sheets.

Diluted earnings per share is computed using the treasury stock method. The denominator used in calculating diluted earnings per share includes the impact of unvested restricted stock and other dilutive, non-participating securities under our equity award agreements. Contingently issuable shares under performance-based award agreements are included in, or excluded from, the denominator depending on whether the performance target is deemed to have been achieved, or not to have been achieved, using the assumption that the end of the reporting period is treated as the end of the contingency period.