Annual report pursuant to Section 13 and 15(d)

Stock-Based Compensation (Summary Of Stock Option Activity) (Details)

v2.4.0.6
Stock-Based Compensation (Summary Of Stock Option Activity) (Details) (USD $)
 12 Months Ended
Dec. 31, 2011
years
Dec. 31, 2010
years
Dec. 31, 2009
years
Dec. 31, 2008
years
Stock-Based Compensation [Abstract]        
Options outstanding at beginning of period, Shares 458,241 508,630 522,380  
Options outstanding at beginning of period, Weighted Average Exercise Price per Share $ 7.23 $ 7.14 $ 7.01  
Exercised, Shares (102,000) (48,889) (13,750)  
Exercised, Weighted Average Exercise Price per Share $ 9.74 $ 6.46 $ 2.20  
Forfeited/expired, Shares   (1,500)    
Forfeited/expired, Weighted Average Exercise Price per Share   $ 2.00    
Options Outstanding end of period, Shares 356,241 458,241 508,630  
Options Outstanding end of period, Weighted Average Exercise Price per Share $ 6.51 $ 7.23 $ 7.14  
Options exercisable at December 31, 2011, Shares 356,241      
Options exercisable at December 31, 2011, Weighted Average Exercise Price per Share $ 6.51      
Options Outstanding, Weighted Average Remaining Contractual Term, end of period 3.41 4.48 5.38 6.24
Options Outstanding, Aggregate Intrinsic Value, end of period $ 8,172,000 $ 6,621,000 $ 2,192,000 $ (1,599,000)
Exercised, Aggregate Intrinsic Value 2,308,000 545,000 71,000  
Options exercisable at December 31, 2011, Weighted Average Remaining Contractual Term 3.41      
Options exercisable at December 31, 2011, Aggregate Intrinsic Value $ 8,172,000