Annual report pursuant to Section 13 and 15(d)

Stock Incentive Plans (Non-Vested Restricted Stock And Restricted Stock)

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Stock Incentive Plans (Non-Vested Restricted Stock And Restricted Stock) (USD $)
12 Months Ended
Dec. 31, 2011
Stock Incentive Plans [Abstract]  
Shares Non-vested balance as of December 31, 2010 1,868,035
Shares Granted 982,363
Shares Vested (698,110)
Shares Forfeited (33,685)
Shares Non-vested balance as of December 31, 2011 2,118,603
Weighted Average Grant Date Fair Value, Non-vested balance as of December 31, 2010 $ 22.62
Weighted Average Grant Date Fair Value, Granted $ 35.32
Weighted Average Grant Date Fair Value, Vested $ 21.55
Weighted Average Grant Date Fair Value, Forfeited $ 20.69
Weighted Average Grant Date Fair Value, Non-vested balance as of December 31, 2011 $ 28.55