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CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Unaudited) (USD $)
In Thousands
Total
COMMON STOCK [Member]
CAPITAL SURPLUS [Member]
RETAINED EARNINGS [Member]
ACCUMULATED OTHER COMPREHENSIVE INCOME [Member]
Balance at beginning of period at Dec. 31, 2012   $ 15,242 $ 82,401 $ 415,607 $ 6,317
Shares issued   9 158    
Net income 13,372     13,372  
Net change (431)       (431)
Tax effect of stock options     23    
Dividends on common stock       (4,422)  
Stock-based compensation arrangements     374    
Shares acquired and canceled   (23)   (920)  
Balance at end of period at Mar. 31, 2013 527,707 15,228 82,956 423,637 5,886
Balance at beginning of period at Dec. 31, 2013 556,997 15,334 88,803 448,953 3,907
Shares issued   30 878    
Net income 14,657     14,657  
Net change 33       33
Tax effect of stock options     (77)    
Dividends on common stock       (4,753)  
Stock-based compensation arrangements     347    
Shares acquired and canceled            
Balance at end of period at Mar. 31, 2014 $ 568,112 $ 15,364 $ 89,951 $ 458,857 $ 3,940