Annual report pursuant to Section 13 and 15(d)

Stock Based Compensation Restricted Share Awards (Details)

v2.4.0.6
Stock Based Compensation Restricted Share Awards (Details) (USD $)
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Fair value of restricted share units vested $ 4,900,000 $ 2,100,000 $ 1,900,000
Restricted Share Awards [Member]
     
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Other Than Options, Vested, Beginning 490,832,000 423,145,000 340,920,000
Other Than Options, Vested, Weighted Average Grant Date Fair Value, Beginning $ 30.20 $ 30.24 $ 29.70
Other Than Options, Nonvested, Number, Beginning 193,339,000 160,276,000 141,411,000
Other Than Options, Nonvested, Weighted Average Grant Date Fair Value $ 27.71 $ 28.13 $ 31.72
Other Than Options, Granted 303,168,000 101,870,000 102,841,000
Other Than Options, Granted, Weighted Average Grant Date Fair Value $ 29.48 $ 28.37 $ 26.67
Other Than Options, Vested During Year (161,971,000) (67,687,000) (82,225,000)
Other Than Options, Vested During Year, Weighted Average Grant Date Fair Value $ 29.80 $ 30.01 $ 32.44
Other Than Options, Forfeited (3,533,000) (1,120,000) (1,751,000)
Other Than Options, Forfeited, Weighted Average Grant Date Fair Value $ 30 $ 28.45 $ 29.77
Other Than Options, Nonvested, Number, Beginning 331,003,000 193,339,000 160,276,000
Other Than Options, Nonvested, Weighted Average Grant Date Fair Value $ 28.39 $ 27.71 $ 28.13
Other Than Options, Vested, Ending 652,803,000 490,832,000 423,145,000
Other Than Options, Vested, Weighted Average Grant Date Fair Value, Ending $ 30.06 $ 30.20 $ 30.24
Share Grants [Member]
     
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Other Than Options, Total Compensation Cost Not yet Recognized $ 5.9    
Other Than Options, Compensation costs, Costs not yet Recognized, Period for Recognition 29