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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, 2014 $ 76,146,000 $ 76,000 $ 28,138,000 $ 2,830,000 $ (27,360,000) $ 72,462,000
Balance (in shares) at Dec. 31, 2014   7,559,012        
Change in Stockholders' Equity:            
Net income 12,050,000         12,050,000
Dividends 0          
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      
Adjustment to Additional Paid in Capital, Income Tax Effect from Share-based Compensation, Net     (205,000)      
Excess tax benefit — equity transactions (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
Change in Stockholders' Equity:            
Net income 7,411,000         7,411,000
Dividends 0          
Change in post retirement benefits, net of tax (34,000)     (34,000)    
Change in Unrealized Gain (Loss) on Foreign Currency Fair Value Hedging Instruments (200,000)     (200,000)    
Change in interest rate swaps, net of tax 3,000     3,000    
Adjustments to Additional Paid in Capital, Income Tax Deficiency from Share-based Compensation (16,000)   (16,000)      
Purchase of treasury stock (in shares)   (10,590)        
Purchase of treasury stock (134,000)       (134,000)  
Restricted stock issued (in shares)   49,183        
Restricted stock issued 0        
Share-based compensation 1,003,000   1,003,000      
Balance (in shares) at Dec. 31, 2016   7,635,093        
Balance at Dec. 31, 2016 96,766,000 $ 76,000 30,134,000 2,414,000 (27,781,000) 91,923,000
Change in Stockholders' Equity:            
Net income 5,459,000          
Dividends (786,000)         (786,000)
Change in post retirement benefits, net of tax (509,000)     (509,000)    
Change in Unrealized Gain (Loss) on Foreign Currency Fair Value Hedging Instruments 3,000     3,000    
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification 0     162,000   (162,000)
Purchase of treasury stock (in shares)   (19,533)        
Purchase of treasury stock (372,000)       (372,000)  
Restricted stock issued (in shares)   95,717        
Restricted stock issued 1,000 $ 1,000        
Share-based compensation 1,331,000   1,331,000      
Balance (in shares) at Dec. 31, 2017   7,711,277        
Balance at Dec. 31, 2017 $ 101,893,000 $ 77,000 $ 31,465,000 $ 2,070,000 $ (28,153,000) $ 96,434,000