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Net Income Per Common Share
9 Months Ended
Sep. 30, 2011
Net Income Per Common Share [Abstract] 
Net Income Per Common Share
10)Net Income Per Common Share:
    The reconciliation of the net income per common share calculation is as follows:
 
   
For the three months ended
  
For the nine months ended
 
($ and shares in thousands, except per share amounts)
 
September 30,
  
September 30,
 
   
2011
  
2010
  
2011
  
2010
 
Net income used for basic and diluted earnings
            
   per common share:
            
Net income attributable to common shareholders of Frontier
 $20,395  $28,995  $107,367  $106,681 
Less:  Dividends paid on unvested restricted stock awards
  (914)  (865)  (2,835)  (2,240)
Total basic and diluted net income attributable to common
                
   shareholders of Frontier
 $19,481  $28,130  $104,532  $104,441 
                  
Basic earnings per common share:
                
Total weighted average shares and unvested restricted stock awards
                
   outstanding - basic
  995,188   993,056   994,642   585,049 
Less:  Weighted average unvested restricted stock awards
  (4,929)  (4,111)  (4,917)  (3,180)
Total weighted average shares outstanding - basic
  990,259   988,945   989,725   581,869 
                  
Net income per share attributable to common shareholders of Frontier
 $0.02  $0.03  $0.11  $0.18 
 
                
Diluted earnings per common share:
                
Total weighted average shares outstanding - basic
  990,259   988,945   989,725   581,869 
Effect of dilutive shares
  535   855   1,478   250 
Effect of dilutive stock units
  490   -   490   - 
Total weighted average shares outstanding - diluted
  991,284   989,800   991,693   582,119 
                  
Net income per share attributable to common shareholders of Frontier
 $0.02  $0.03  $0.11  $0.18 

Stock Options
For the three and nine months ended September 30, 2011 and 2010, options to purchase 930,000 shares (at exercise prices ranging from $8.19 to $14.15) and 3,429,000 shares (at exercise prices ranging from $8.19 to $18.46), respectively, issuable under employee compensation plans were excluded from the computation of diluted earnings per share (EPS) for those periods because the exercise prices were greater than the average market price of our common stock and, therefore, the effect would be antidilutive.  In calculating diluted EPS, we apply the treasury stock method and include future unearned compensation as part of the assumed proceeds.

In addition, for the three and nine months ended September 30, 2011 and 2010, we have deducted the impact of dividends paid on unvested restricted stock awards from net income attributable to common shareholders of Frontier.

Stock Units
At September 30, 2011 and 2010, we had 490,018 and 388,722 stock units, respectively, issued under our Non-Employee Directors' Deferred Fee Equity Plan (Deferred Fee Plan) and the Non-Employee Directors' Equity Incentive Plan (Directors' Equity Plan).  These securities have not been included in the diluted income per share of common stock calculation for the three and nine months ended September 30, 2010, because their inclusion would have an antidilutive effect.