Annual report pursuant to Section 13 and 15(d)

Stock Based Compensation - Restricted Share Awards (Details)

v2.4.0.8
Stock Based Compensation - Restricted Share Awards (Details) (USD $)
In Millions, except Share data, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]      
Fair value of restricted share units vested $ 3.8 $ 5.6 $ 4.9
Restricted Share Awards [Member]
     
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Other Than Options, Vested, Beginning 864,288 652,803 490,832
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]      
Other Than Options, Nonvested, Number, Beginning 149,803 331,003 193,339
Other Than Options, Granted 141,609 36,884 303,168
Other Than Options, Vested During Year (158,657) (211,485) (161,971)
Other Than Options, Forfeited (2,940) (6,599) (3,533)
Other Than Options, Nonvested, Number, Beginning 129,815 149,803 331,003
Other Than Options, Vested, Ending 1,022,945 864,288 652,803
Other Than Options, Vested, Weighted Average Grant Date Fair Value, Beginning $ 29.65 $ 30.06 $ 30.20
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]      
Other Than Options, Nonvested, Weighted Average Grant Date Fair Value $ 27.37 $ 28.39 $ 27.71
Other Than Options, Granted, Weighted Average Grant Date Fair Value $ 26.30 $ 26.40 $ 29.48
Other Than Options, Vested During Year, Weighted Average Grant Date Fair Value $ 26.66 $ 28.39 $ 29.80
Other Than Options, Forfeited, Weighted Average Grant Date Fair Value $ 27.80 $ 27.61 $ 28.10
Other Than Options, Nonvested, Weighted Average Grant Date Fair Value $ 27.06 $ 27.37 $ 28.39
Other Than Options, Vested, Weighted Average Grant Date Fair Value, Ending $ 29.19 $ 29.65 $ 30.06
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized $ 1.8    
Total compensation cost not yet recognized, period for recognition 21 months