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Condensed Consolidated Statements of Stockholders' Equity (USD $)
In Thousands, except Share data
Total
Common Stock
Additional Paid-In Capital
Retained Earnings
Accumulated Other Comprehensive Loss
Deferred Compensation
Treasury Stock
Beginning balance at Dec. 31, 2010 $ 226,239 $ 4,635 $ 148,159 $ 76,805 $ (3,360) $ 777 $ (777)
Beginning balance, shares at Dec. 31, 2010 [1]   9,524,195          
Net Income 27,622     27,622      
Other comprehensive income (loss) (1,167)       (1,167)    
Dividend Reinvestment Plan (22)   (22)        
Retirement Savings Plan, shares [1]   2,002          
Retirement Savings Plan 80 1 79        
Conversion of debentures, shares [1]   10,680          
Conversion of debentures 181 5 176        
Share-based compensation, shares [1],[2],[3]   30,430          
Share-based compensation [2],[3] 1,013 15 998        
Tax benefit on share-based compensation 13   13        
Deferred Compensation Plan           40 (40)
Purchase of treasury stock, shares [1]   (993)          
Purchase of treasury stock (40)           (40)
Sale and distribution of treasury stock, shares [1]   993          
Sale and distribution of treasury stock 40           40
Dividends on share-based compensation (129)     (129)      
Cash dividends [4] (13,050)     (13,050)      
Ending balance at Dec. 31, 2011 240,780 4,656 149,403 91,248 (4,527) 817 (817)
Ending balance, shares at Dec. 31, 2011 [1]   9,567,307          
Net Income 10,727     10,727      
Other comprehensive income (loss) 67       67    
Dividend Reinvestment Plan (3)   (3)        
Conversion of debentures, shares [1]   1,818          
Conversion of debentures 31 1 30        
Share-based compensation, shares [1],[2],[3]   8,417          
Share-based compensation [2],[3] (174) 4 (178)        
Deferred Compensation Plan           11 (11)
Purchase of treasury stock, shares [1]   (243)          
Purchase of treasury stock (11)           (11)
Sale and distribution of treasury stock, shares [1]   243          
Sale and distribution of treasury stock 11           11
Dividends on share-based compensation 20     20      
Cash dividends [4] (3,304)     (3,304)      
Ending balance at Mar. 31, 2012 $ 248,144 $ 4,661 $ 149,252 $ 98,691 $ (4,460) $ 828 $ (828)
Ending balance, shares at Mar. 31, 2012 [1]   9,577,542          
[1] Includes 30,840 and 30,597 shares at March 31, 2012 and December 31, 2011, respectively, held in a Rabbi Trust established by the Company relating to the Deferred Compensation Plan.
[2] Includes amounts for shares issued for Directors' compensation.
[3] The shares issued under the Performance Incentive Plan ("PIP") are net of shares withheld for employee taxes. For three months ended March 31, 2012 and for the year ended December 31, 2011, the Company withheld 5,670 and 12,324 shares, respectively, for taxes.
[4] Cash dividends per share for the periods ended March 31, 2012 and December 31, 2011 were $0.345 and $1.365 respectively.