XML 76 R94.htm IDEA: XBRL DOCUMENT v2.4.0.8
Share-based compensation (Details 5) (USD $)
In Millions, except Share data, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
LTIP linked to TRS and other performance conditions (in shares)      
Granted (in shares) 0    
Weighted-average grant-date fair value per share      
Total weighted-average grant-date fair value $ 3.0 $ 2.6 $ 2.5
Tax benefits realized for the tax deductions 2.8 2.4 1.5
LTIP awards linked to other performance conditions
      
LTIP linked to TRS and other performance conditions (in shares)      
Outstanding, beginning of period (in shares) 247,175 182,498 161,310
Granted (in shares) 120,399 125,157 113,831
Vested (in shares) (18,280) 0 0
Cancelled (in shares) (41,599) (50,786) (81,908)
Forfeited (in shares) (10,852) (9,694) (10,735)
Outstanding, end of period (in shares) 296,843 247,175 182,498
Weighted-average grant-date fair value per share      
Outstanding, beginning of period (in dollars per share) $ 25.04 $ 22.63 $ 18.66
Granted (in dollars per share) $ 26.89 $ 26.05 $ 24.96
Vested (in dollars per share) $ 18.95 $ 0.00 $ 0.00
Cancelled (in dollars per share) $ 24.97 $ 18.95 $ 18.38
Forfeited (in dollars per share) $ 26.20 $ 24.44 $ 20.12
Outstanding, end of period (in dollars per share) $ 26.14 $ 25.04 $ 22.63
Total weighted-average grant-date fair value 3.2 3.3 2.8
Fair value of vested stock (in dollars) 0.6    
Tax benefits realized for the tax deductions 0.2    
2012-2014 LTIP linked to other performance conditions
      
Weighted-average grant-date fair value per share      
Unrecognized compensation cost 3.1    
Weighted-average period over which unrecognized compensation cost expected to be recognized 1 year 6 months    
Long-term incentive plan (LTIP)
      
Share-based compensation      
Payout low end of range (as a percent) 0.00%    
Payout high end of range (as a percent) 200.00%    
Performance period 3 years    
LTIP linked to TRS
      
LTIP linked to TRS and other performance conditions (in shares)      
Outstanding, beginning of period (in shares) 239,256 197,385 126,782
Granted (in shares) 91,038 81,223 75,015
Vested (in shares) (87,753) (35,397) 0
Forfeited (in shares) (10,414) (3,955) (4,412)
Outstanding, end of period (in shares) 232,127 239,256 197,385
Weighted-average grant-date fair value per share      
Outstanding, beginning of period (in dollars per share) $ 29.12 $ 25.94 $ 20.33
Granted (in dollars per share) $ 32.69 $ 30.71 $ 35.46
Vested (in dollars per share) $ 22.45 $ 14.85 $ 0.00
Forfeited (in dollars per share) $ 32.72 $ 30.82 $ 29.56
Outstanding, end of period (in dollars per share) $ 32.88 $ 29.12 $ 25.94
Total weighted-average grant-date fair value 3.0 2.5 2.7
Risk-free interest rate (as a percent) 0.38% 0.33% 1.25%
Expected life 3 years 3 years 3 years
Expected volatility (as a percent) 19.40% 25.30% 27.80%
Range of expected volatility for Peer Group, minimum (as a percent) 12.40% 15.50% 21.20%
Range of expected volatility for Peer Group, maximum (as a percent) 25.30% 34.50% 82.60%
Grant date fair value (in dollars per share) $ 32.69 $ 30.71 $ 35.46
Fair value of vested stock (in dollars) 2.2 0.6  
Tax benefits realized for the tax deductions 0.9 0.2  
Unrecognized compensation cost $ 2.4    
Weighted-average period over which unrecognized compensation cost expected to be recognized 1 year 6 months