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Condensed Consolidated Statement of Stockholders' Equity (USD $)
Share data in Thousands
Total
Common Stock Shares [Member]
Non-Redeemable Preferred Stock [Member]
Capital in Excess of Par Value [Member]
Retained Earnings [Member]
Treasury Stock-Common [Member]
Balance at Dec. 31, 2012 $ 354,497,000 $ 2,673,000 $ 3,000,000 $ 165,006,000 $ 212,192,000 $ (28,374,000)
Balance, shares at Dec. 31, 2012   26,731        
Net income 7,359,000       7,359,000  
Dividends paid on preferred stocks (300,000)       (300,000)  
Stock-based compensation 787,000     787,000    
Exercise of stock options 304,000 3,000   301,000    
Exercise of stock options, shares   31        
Excess income tax benefit associated with stock-based compensation 110,000     110,000    
Balance at Jun. 30, 2013 $ 362,757,000 $ 2,676,000 $ 3,000,000 $ 166,204,000 $ 219,251,000 $ (28,374,000)
Balance, shares at Jun. 30, 2013   26,762