Quarterly report pursuant to Section 13 or 15(d)

Share-Based Payments - Stock Option Activity (Details)

v2.4.0.6
Share-Based Payments - Stock Option Activity (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
 3 Months Ended 6 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2012
Jun. 30, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Share-based compensation expense $ 1,517 $ 1,512 $ 3,123 $ 2,955
Employee Stock Option [Member]
        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Share-based compensation expense 596 952 1,418 2,064
Tax benefit related to share-based expense 164 252 378 556
Unrecognized share-based compensation, net of estimated forfeitures 2,669 4,727 2,669 4,727
Employee activity - stock options [Abstract]        
Stock option grants expire (in years)     7  
Grants, vesting period (in years)     3  
Expected dividend yield (in hundredths)     0.90% 1.00%
Expected stock price volatility     46.60% 44.90%
Weighted Average Risk Free Interest Rate     0.80% 2.40%
Expected life of options (in years)     4.2 4.6
Weighted-average fair value of options (dollars per share)     $ 13 $ 11
Outstanding, beginning of period (in shares) 3,148,000   3,363,000  
Granted (in shares) 0   93,000  
Exercised (in shares) (10,000)   (318,000)  
Outstanding, end of period (in shares) 3,138,000   3,138,000  
Exercisable, end of period (in shares) 2,745,000   2,745,000  
Outstanding, beginning of period (in dollars per share) $ 27   $ 26  
Grants in Period (in dollars per share) $ 0   $ 37  
Exercises in Period (in dollars per share) $ 25   $ 27  
Outstanding, end of period (in dollars per share) $ 27   $ 27  
Exercisable, end of period (in dollars per share) $ 26   $ 26  
Aggregate Intrinsic Value Outstanding, end of period 20,082   20,082  
Aggregate Intrinsic Value Exercisable, end of period $ 17,748   $ 17,748  
Weighted-average remaining contractual term Outstanding, end of period (in years) 3.0   3.0  
Weighted-average remaining contractual term Exercisable, end of period (in years) 2.7   2.7  
Non-employee Director Stock Options [Member]
        
Employee activity - stock options [Abstract]        
Outstanding, end of period (in shares) 40,625   40,625  
Exercisable, end of period (in dollars per share) $ 21   $ 21  
Weighted-average remaining contractual term Outstanding, end of period (in years) 2.0   2.0  
Non-employee Director Activity - Options [Abstract]        
Terms of options granted to non-employee directors (in years) 10   10