Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation (Summary Of Restricted Stock Award And Unit Activity) (Details)

v2.4.0.6
Stock-Based Compensation (Summary Of Restricted Stock Award And Unit Activity) (Details) (Restricted Stock [Member], USD $)
3 Months Ended
Mar. 31, 2013
Restricted Stock [Member]
 
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]  
Number of Unvested Restricted Shares, beginning of period (shares) 245,831
Granted, Number of Unvested Restricted Shares (shares) 178,500
Vested, Number of Unvested Restricted Shares (shares) (35,221)
Forfeited, Number of Unvested Restricted Shares (shares) 0
Number of Unvested Restricted Shares, end of period (shares) 389,110
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]  
Unvested Restricted Shares, Weighted Average Grant Date Fair Value, beginning of period (usd per share) $ 31.88
Granted, Weighted Average Grant Date Fair Value (usd per share) $ 35.80
Vested, Weighted Average Grant Date Fair Value (usd per share) $ 36.12
Forfeited, Weighted Average Grant Date Fair Value (usd per share) $ 0.00
Unvested Restricted stock, Weighted Average Grant Date Fair Value, end of period (usd per share) $ 33.29