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Condensed Consolidated Statements of Changes in Shareholders' Equity (Unaudited) (USD $)
In Thousands, except Share data
Total
Common Stock [Member]
Additional Paid-in Capital [Member]
Retained Earnings [Member]
Accumulated Other Comprehensive Income (Loss), net [Member]
Treasury Stock [Member]
Beginning balance at Dec. 31, 2012 $ 746,007 $ 105,563 $ 365,354 $ 315,608 $ 1,259 $ (41,777)
Beginning balance, shares at Dec. 31, 2012   99,629,494        
Net Income 10,553     10,553    
Other comprehensive income (loss) (1,571)       (1,571)  
Dividends, Common Stock, Cash (4,976)     (4,976)    
Discount on dividend reinvestment plan purchases (25)   (25)      
Treasury stock acquired (2,381)         (2,381)
Treasury stock acquired, shares   (331,374)        
Restricted stock, shares   0        
Restricted stock 121   25 0   96
Ending balance at Mar. 31, 2013 747,728 105,563 365,354 321,185 (312) (44,062)
Ending balance, shares at Mar. 31, 2013   99,298,120        
Beginning balance at Dec. 31, 2013 711,697 105,563 365,333 334,748 (20,588) (73,359)
Beginning balance, shares at Dec. 31, 2013 95,245,215 95,245,215        
Net Income 12,300     12,300    
Other comprehensive income (loss) 8,096       8,096  
Dividends, Common Stock, Cash (6,618)     (6,618)    
Discount on dividend reinvestment plan purchases (33)   (33)      
Treasury stock acquired (8,941)         (8,941)
Treasury stock acquired, shares   (1,084,958)        
Restricted stock, shares   63,626        
Restricted stock 282   169 0   113
Ending balance at Mar. 31, 2014 $ 716,783 $ 105,563 $ 365,469 $ 340,430 $ (12,492) $ (82,187)
Ending balance, shares at Mar. 31, 2014 94,223,883 94,223,883