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Condensed Consolidated Statements of Stockholders' Equity (Unaudited) (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 15,787     15,787      
Other comprehensive income (loss) 133       133    
Dividend Reinvestment Plan (4)   (4)        
Conversion of debentures, shares [1]   5,341          
Conversion of debentures 91 3 88        
Share-based compensation, shares [1],[2],[3]   19,217          
Share-based compensation [2],[3] 430 9 421        
Deferred Compensation Plan           141 (141)
Purchase of treasury stock, shares [1]   (502)          
Purchase of treasury stock (21)           (21)
Sale and distribution of treasury stock, shares [1]   502          
Sale and distribution of treasury stock 21           21
Dividends on share-based compensation (5)     (5)      
Cash dividends [4] (6,805)     (6,805)      
Ending balance at Jun. 30, 2012 $ 250,407 $ 4,668 $ 149,908 $ 100,225 $ (4,394) $ 958 $ (958)
Ending balance, shares at Jun. 30, 2012 [1]   9,591,865          
[1] Includes 32903 and 30,597 shares at June 30, 2012 and December 31, 2011, respectively, held in a Rabbi Trust established by the Company relating to the Deferred Compensation Plan.
[2] The shares issued under the Performance Incentive Plan ("PIP") are net of shares withheld for employee taxes. For six months ended June 30, 2012 and for the year ended December 31, 2011, the Company withheld 5,670 and 12,324 shares, respectively, for taxes.
[3] Includes amounts for shares issued for Directors' compensation.
[4] Cash dividends per share for the periods ended June 30, 2012 and December 31, 2011 were $0.710 and $1.365 respectively.