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Consolidated Statements of Stockholders' Equity - USD ($)
$ in Thousands
Total
Common Stock [Member]
Additional Paid-In Capital [Member]
Retained Income [Member]
Accumulated Other Comprehensive Income, Net of Tax [Member]
Share Repurchase Plan [Member]
Share Repurchase Plan [Member]
Common Stock [Member]
Share Repurchase Plan [Member]
Additional Paid-In Capital [Member]
Series A Preferred Stock [Member]
Beginning Balance at Dec. 31, 2013 $ 160,521   $ 48,966 $ 110,441 $ 1,114        
Beginning Balance, shares at Dec. 31, 2013   10,939,268             110,684
Net income 34,050     34,050          
Total other comprehensive income, net of income taxes 2,883       2,883        
Conversion of preferred stock to common stock, shares   107,298             (107,298)
Issuance of restricted stock 0 $ 0 0 0 0       $ 0
Issuance of restricted stock, shares   98,720              
Exercise of common stock options, value $ 125   125            
Exercise of common stock options, shares 50,000 50,000              
Forfeiture of restricted stock, value $ 0 $ 0 0 0 0       $ 0
Forfeiture of restricted stock, shares   (3,330)              
Repurchase and retirement of common stock, value (597)   (597)     $ (17,810)   $ (17,810)  
Repurchase and retirement of common stock, shares   (13,541)         (488,346)    
Redemption of Series A preferred stock (34)   (25) (9)          
Redemption of Series A preferred stock, shares                 (3,386)
Deferred taxes on debt discount 215   215            
Common stock dividends (8,901)     (8,901)          
Preferred stock dividends 4     4          
Tax benefits on stock-based compensation 1,304   1,304            
Stock-based compensation 4,333   4,333            
Ending Balance at Jun. 30, 2014 176,093   36,511 135,585 3,997        
Ending Balance, shares at Jun. 30, 2014   10,690,069              
Beginning Balance at Dec. 31, 2014 182,585   20,465 161,454 666        
Beginning Balance, shares at Dec. 31, 2014   10,189,128              
Net income 47,400     47,400          
Total other comprehensive income, net of income taxes (535)       (535)        
Issuance of restricted stock 0 $ 0 0 0 0       $ 0
Issuance of restricted stock, shares   83,260              
Exercise of common stock options, value $ 200   200            
Exercise of common stock options, shares 80,000 80,000              
Forfeiture of restricted stock, value $ 0 $ 0 0 0 0       $ 0
Forfeiture of restricted stock, shares   (34,412)              
Repurchase and retirement of common stock, value (772)   (772)     $ (1,610)   $ (1,610)  
Repurchase and retirement of common stock, shares   (16,958)         (37,869)    
Common stock dividends (6,001)     (6,001)          
Tax benefits on stock-based compensation 1,691   1,691            
Stock-based compensation 2,789   2,789            
Ending Balance at Jun. 30, 2015 $ 225,747   $ 22,763 $ 202,853 $ 131        
Ending Balance, shares at Jun. 30, 2015   10,263,149