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Equity Based Plans (Tables)
12 Months Ended
Dec. 31, 2012
Equity Based Plans, Preferred Stock and Common Stock [Abstract]  
Cumulative summary of equity plans
                                                 

Equity Plans

  Authorized     Restricted
Stock
Issued
    Outstanding
Stock
Options
    Stock
Options
Exercised
    Stock
Options
Exercisable
    Shares
Available
for Grant
 

1992 Plan

    3,495,000       —         —         2,796,012       —         —    

Amended 1999 Plan

    600,000       360,900       15,840       123,951       15,840       99,309  

Amended 2003 Plan

    1,250,000       253,400       60,000       718,300       60,000       218,300  

Inducements

    164,000       —         —         164,000       —         —    
   

 

 

   

 

 

   

 

 

   

 

 

   

 

 

   

 

 

 
      5,509,000       614,300       75,840       3,802,263       75,840       317,609  
   

 

 

   

 

 

   

 

 

   

 

 

   

 

 

   

 

 

 
Summary of stock options granted under the plans
                                 
    Number of
Shares
    Weighted
Average
Exercise
Price
    Weighted
Average
Remaining
Contractual
Term
    Aggregate
Intrinsic
Value
(000’s)
 

Outstanding at December 31, 2009

    874,192       14.24       4.6 Years          

Granted

    —         —                    

Exercised

    (142,002     13.66                  

Cancelled

    (160     18.42                  

Forfeited

    (8,140     18.54                  
   

 

 

                         

Outstanding at December 31, 2010

    723,890       14.30       3.6 Years          

Granted

    —         —                    

Exercised

    (375,080     13.92                  

Cancelled

    —         —                    

Forfeited

    —         —                    
   

 

 

                         

Outstanding at December 31, 2011

    348,810       14.71       2.6 Years          
   

 

 

                         

Granted

    —                            

Exercised

    (272,750     14.12                  

Cancelled

    (220     17.89                  

Forfeited

    —         —                    
   

 

 

                         

Outstanding at December 31, 2012

    75,840       —         2.2 Years          
   

 

 

                         

Exercisable at December 31, 2012

    75,840       —         2.2 Years     $ 811  
   

 

 

                         
Summary of the intrinsic value of stock options exercised
                 
    Number
of Shares
    Aggregate
Intrinsic
Value
(000’)
 

2010

    142,002     $ 863  

2011

    375,080     $ 3,160  

2012

    272,750     $ 3,459  
Stock options outstanding
                                         
    Outstanding
Options as of
December 31,
2012
    Exercise Price     Weighted
Average
Remaining
Contractual
Life
    Exercisable     Exercise Price  

1999 Plan

    15,840     $ 12.60 – $18.42       2.2 Years       15,840     $ 12.60 – $18.42  

2003 Plan

    60,000     $ 12.51 – $18.80       2.2 Years       60,000     $ 12.51 – $18.80  
   

 

 

                   

 

 

         
      75,840     $ 12.51 – $18.80       2.2 Years       75,840     $ 12.51 – $18.80  
   

 

 

                   

 

 

         
           
    Outstanding
Options as of
December 31,
2011
    Exercise Price     Weighted
Average
Remaining
Contractual
Life
    Exercisable     Exercise Price  

1999 Plan

    17,310     $ 12.60 – $18.42       3.2 Years       17,310     $ 12.60 – $18.42  

2003 Plan

    251,500     $ 12.51 – $18.80       2.9 Years       251,500     $ 12.51 – $18.80  

Inducements

    80,000     $ 12.75 – $14.32       1.7 Years       80,000     $ 12.75 – $14.32  
   

 

 

                   

 

 

         
      348,810     $ 12.51 – $18.80       2.6 Years       348,810     $ 12.51 – $18.80  
   

 

 

                   

 

 

         
           
    Outstanding
Options as of
December 31,
2010
    Exercise Price     Weighted
Average
Remaining
Contractual
Life
    Exercisable     Exercise Price  

1992 Plan

    15,000     $ 16.34       .6 Years       15,000     $ 16.34  

1999 Plan

    43,390     $ 12.60 – $18.42       3.9 Years       43,390     $ 12.60 – $18.42  

2003 Plan

    541,500     $ 12.51 – $18.80       3.8 Years       541,500     $ 12.51 – $18.80  

Inducements

    124,000     $ 12.75 – $14.32       2.8 Years       124,000     $ 12.75 – $14.32  
   

 

 

                   

 

 

         
      723,890     $ 12.51 – $18.80       3.6 Years       723,890     $ 12.51 – $18.80  
   

 

 

                   

 

 

         
Stock options outstanding and exercisable
                 

Range of Exercise Prices

  Outstanding
Options
    Exercisable
Options
 

$12.00 – $12.99

    11,790       11,790  

$14.00 – $14.99

    2,500       2,500  

$15.00 – $15.99

    12,550       12,550  

$18.00 – $18.80

    49,000       49,000  
   

 

 

   

 

 

 
      75,840       75,840  
   

 

 

   

 

 

 
Summary of restricted stock granted to directors, officers and employees pursuant to its equity plans
                 

Year Granted

  Number of
Shares
    Weighted
Average
Fair Value
Per Share
 

2010

    84,400     $ 16.53  

2011

    156,750     $ 19.94  

2012

    80,650     $ 21.65