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CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY - USD ($)
$ in Thousands
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 Outstanding at Dec. 31, 2012   99,629,494        
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Net Income 41,482     41,482    
Total other comprehensive (loss) Income (21,847)       (21,847)  
Cash dividends declared (22,344)     $ (22,344)    
Discount on dividend reinvestment plan purchases (112)   (112)    
Treasury stock acquired (32,217)         (32,217)
Treasury stock acquired, Shares Outstanding   (4,462,638)        
Treasury stock reissued 176   0 $ 0   176
Treasury stock reissued, Shares Outstanding   25,359        
Restricted stock 552 $ 0 91 2   459
Restricted stock, Shares Outstanding   53,000        
Ending balance at Dec. 31, 2013 711,697 $ 105,563 365,333 334,748 (20,588) (73,359)
Ending balance, Shares Outstanding at Dec. 31, 2013   95,245,215        
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Net Income 44,453     44,453    
Total other comprehensive (loss) Income 16,089       16,089  
Cash dividends declared (26,174)     (26,174)    
Discount on dividend reinvestment plan purchases (65)   (65)      
Treasury stock acquired (30,956)         (30,956)
Treasury stock acquired, Shares Outstanding   (3,636,634)        
Treasury stock reissued 192   35 0   157
Treasury stock reissued, Shares Outstanding   21,960        
Restricted stock 909 $ 0 312 0   597
Restricted stock, Shares Outstanding   92,487        
Ending balance at Dec. 31, 2014 $ 716,145 $ 105,563 365,615 353,027 (4,499) (103,561)
Ending balance, Shares Outstanding at Dec. 31, 2014 91,723,028 91,723,028        
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Net Income $ 50,143     50,143    
Total other comprehensive (loss) Income 2,113       2,113  
Cash dividends declared (25,089)     (25,089)    
Treasury stock acquired (25,383)         (25,383)
Treasury stock acquired, Shares Outstanding   (2,918,066)        
Treasury stock reissued 192   32 0   160
Treasury stock reissued, Shares Outstanding   20,936        
Restricted stock 1,425 $ 0 334 0   1,091
Restricted stock, Shares Outstanding   135,370        
Ending balance at Dec. 31, 2015 $ 719,546 $ 105,563 $ 365,981 $ 378,081 $ (2,386) $ (127,693)
Ending balance, Shares Outstanding at Dec. 31, 2015 88,961,268 88,961,268.000