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Consolidated Statement of Stockholders' Equity - USD ($)
Total
Common Stock Outstanding
Paid-In Capital
Accumulated Other Comprehensive Income
Treasury Stock
Retained Earnings
Balance at Dec. 31, 2012 $ 57,998,000 $ 71,000 $ 25,526,000 $ 3,187,000 $ (26,748,000) $ 55,962,000
Balance (in shares) at Dec. 31, 2012   7,130,804        
Change in Stockholders' Equity:            
Net income 6,866,000         6,866,000
Change in post retirement benefits, net of tax 1,661,000     1,661,000    
Change in interest rate swaps, net of tax 24,000     24,000    
Common stock issued (in shares)   132,725        
Common stock issued 410,000 $ 1,000 409,000      
Excess tax benefit — equity transactions 409,000   409,000      
Purchase of treasury stock (in shares)   (36,329)        
Purchase of treasury stock (334,000)       (334,000)  
Restricted stock issued (in shares)   91,573        
Restricted stock issued 1,000 $ 1,000        
Share-based compensation 413,000   413,000      
Balance (in shares) at Dec. 31, 2013   7,318,773        
Balance at Dec. 31, 2013 67,448,000 $ 73,000 26,757,000 4,872,000 (27,082,000) 62,828,000
Change in Stockholders' Equity:            
Net income 9,634,000         9,634,000
Change in post retirement benefits, net of tax (2,056,000)     (2,056,000)    
Change in interest rate swaps, net of tax 14,000     14,000    
Common stock issued (in shares)   186,060        
Common stock issued 328,000 $ 2,000 326,000      
Excess tax benefit — equity transactions 311,000   311,000      
Purchase of treasury stock (in shares)   (21,797)        
Purchase of treasury stock (278,000)       (278,000)  
Restricted stock issued (in shares)   75,976        
Restricted stock issued 1,000 $ 1,000        
Share-based compensation 744,000   744,000      
Balance (in shares) at Dec. 31, 2014   7,559,012        
Balance at Dec. 31, 2014 76,146,000 $ 76,000 28,138,000 2,830,000 (27,360,000) 72,462,000
Change in Stockholders' Equity:            
Net income 12,050,000         12,050,000
Change in post retirement benefits, net of tax (198,000)     (198,000)    
Change in interest rate swaps, net of tax 13,000     13,000    
Common stock issued (in shares)   3,000        
Common stock issued 19,000 19,000      
Excess tax benefit — equity transactions 205,000   205,000      
Purchase of treasury stock (in shares)   (12,141)        
Purchase of treasury stock (287,000)       (287,000)  
Restricted stock issued (in shares)   46,629        
Restricted stock issued 0        
Share-based compensation 785,000   785,000      
Balance (in shares) at Dec. 31, 2015   7,596,500        
Balance at Dec. 31, 2015 $ 88,733,000 $ 76,000 $ 29,147,000 $ 2,645,000 $ (27,647,000) $ 84,512,000