Net Earnings Per Share

12 Months Ended

Dec. 31, 2012

Net Earnings Per Share [Abstract]

Net Earnings Per Share

E.   NET EARNINGS PER SHARE:

Basic earnings per share is based on the weighted average number of common shares and participating securities outstanding during the period.  Diluted earnings per share also includes the dilutive effect of additional potential common shares issuable under the Company’s stock-based Incentive Compensation Plan, which are determined using the treasury stock method.  Unvested stock awards, which contain non-forfeitable rights to dividends, whether paid or unpaid (“participating securities”), are included in the number of shares outstanding for both basic and diluted earnings per share calculations.