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) (USD $)
3 Months Ended
Mar. 31, 2012
Stock-Based Compensation [Abstract]  
Number of Unvested Restricted Shares as of December 31, 2011 203,348
Unvested Restricted Shares, Weighted Average Grant Date Fair Value as of December 31, 2011 $ 26.02
Granted, Number of Unvested Restricted Shares 167,500
Granted, Weighted Average Grant Date Fair Value $ 37.36
Vested, Number of Unvested Restricted Shares (28,346)
Vested, Weighted Average Grant Date Fair Value $ 30.28
Number of Unvested Restricted Shares as of March 31, 2012 342,502
Unvested Restricted Shares, Weighted Average Grant Date Fair Value as of March 31, 2012 $ 31.21