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Unaudited Condensed Consolidated Statements of Stockholders' Equity (USD $)
In Thousands, except Share data
Total
Common Stock
Additional Paid-in Capital
Retained Earnings
Accumulated Other Comprehensive Income (Loss)
Beginning Balance at Dec. 31, 2011 $ 42,293 $ 118 $ 295 $ 42,491 $ (611)
Beginning Balance, shares at Dec. 31, 2011   11,792,456      
Tax shortfall associated with stock-based compensation arrangements (740)   (740)    
Restricted stock grants, net of forfeitures and conversions    1 (1)    
Restricted stock grants, net of forfeitures and conversions, shares   71,484      
Stock-based compensation 2,390   2,390    
Common stock dividends (11,865)     (11,865)  
Change in fair value of derivative instrument, net of income tax (41)       (41)
Net income 23,989     23,989  
Balance at Mar. 31, 2012 56,026 119 1,944 54,615 (652)
Balance, shares at Mar. 31, 2012   11,863,940      
Beginning Balance at Dec. 31, 2012 40,988 114 299 41,311 (736)
Beginning Balance, shares at Dec. 31, 2012   11,387,299      
Tax shortfall associated with stock-based compensation arrangements (3,286)   (421) (2,865)  
Repurchase of common stock (24,999) (5) (1,752) (23,242)  
Repurchase of common stock, shares   (495,085)      
Restricted stock grants, net of forfeitures and conversions    (1) 1    
Restricted stock grants, net of forfeitures and conversions, shares   (81,342)      
Stock-based compensation 2,250   2,250    
Change in fair value of derivative instrument, net of income tax 139       139
Net income 17,231     17,231  
Balance at Mar. 31, 2013 $ 32,323 $ 108 $ 377 $ 32,435 $ (597)
Balance, shares at Mar. 31, 2013   10,810,872