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Consolidated Statements of Shareholders' Equity (USD $)
In Thousands, except Share data, unless otherwise specified
Total
Common Stock
Additional Paid-in Capital
Accumulated Other Comprehensive Income (Loss) [Member]
Retained Earnings (Accumulated Deficit)
Accumulated Net Unrealized Investment Gain (Loss) [Member]
Balance at the beginning of the period at Dec. 31, 2011 $ 39,664 $ 9 $ 40,073 $ 0 $ (418)  
Common stock outstanding, beginning (in shares) at Dec. 31, 2011   9,098,152        
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Exercise of stock options (in shares)   159,869        
Exercise of stock options (in shares) 489   489      
Stock Repurchased (in shares)   (94,744)        
Stock Repurchased (in dollars) (384)   (384)      
Tax benefit - stock option exercise 10   10      
Compensation cost associated with ASC Topic 718 241   241      
Employee Stock Purchase Plan (in shares)   185        
Employee stock purchase plan (in dollars) 1   1      
Net income 26,647     0 26,647  
Balance at end of the period at Dec. 31, 2012 66,668 9 40,430 0 26,229  
Common stock outstanding, ending (in shares) at Dec. 31, 2012 9,163,462 9,163,462        
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Exercise of stock options (in shares) 122,650 122,650        
Exercise of stock options (in shares) 489 0 489      
Stock Repurchased (in shares)   (300,087)        
Stock Repurchased (in dollars) (2,416) 0 0   (2,416)  
Tax benefit - stock option exercise 96 0 96      
Compensation cost associated with ASC Topic 718 296 0 296      
Employee Stock Purchase Plan (in shares)   55        
Employee stock purchase plan (in dollars) 0 0 0      
Other Comprehensive Income (Loss), before Tax 23         23
Net income 5,179       5,179  
Balance at end of the period at Dec. 31, 2013 $ 70,335 $ 9 $ 41,311   $ 28,992 $ 23
Common stock outstanding, ending (in shares) at Dec. 31, 2013 8,986,080 8,986,080