v2.4.0.8
Stockholders' Equity (Details) (USD $)
 0 Months Ended 12 Months Ended
Dec. 03, 2012
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Decrease in net income due to adjustments to redeemable non-controlling interest   $ (1,976,000)    
Stock Split three-for-one      
Common stock, shares authorized 23,500,000 70,500,000 70,500,000  
Preferred stock, shares authorized 5,000,000 15,000,000 15,000,000  
Cash dividend declared (in dollars per share)     $ 7.00  
Cash dividend declared     91,629,000  
Cash dividend declared date     Dec. 10, 2012  
Cash dividend paid date     Dec. 28, 2012  
Cash dividend record date     Dec. 20, 2012  
Dividend on restricted shares forfeited   $ 34,000    
Reconciliation of basic to diluted weighted average common shares outstanding        
Weighted average number of common shares outstanding - basic (in shares)   38,923,206 38,594,286 37,999,422
Dilutive effect of:        
Common stock options (in shares)   217,082 398,452 453,054
Unvested restricted stock (in shares)   70,104 51,730 30,309
Weighted average number of common shares outstanding - diluted (in shares)   39,210,392 39,044,468 38,482,785
Common stock options
        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Antidilutive securities excluded from computation of diluted income per share (in shares)   55,000