XML 94 R77.htm IDEA: XBRL DOCUMENT v3.3.1.900
Share-based compensation plans (restricted stock units, restricted shares and performance share awards) (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Restricted stock units [Member]      
Changes in share-based compensation awards (in thousands)      
Outstanding, beginning of year 166 150 123
Granted 34 30 45
Vested (30) (13) (11)
Forfeited (3) (1) (7)
Outstanding, end of year 167 166 150
Weighted-average grant date fair value      
Outstanding, beginning of year $ 30.51 $ 27.11 $ 24.56
Granted 63.28 53.64 36.74
Vested 25.05 23.42 24.33
Forfeited 58.04 34.08 26.78
Outstanding, end of year $ 34.74 $ 30.51 $ 27.11
Additional disclosures      
Weighted-average remaining contractual term, outstanding, end of year 3 years 11 months    
Fair value, awards vested $ 1,970 $ 654 $ 390
Restricted stock units classified as liabilities [Member]      
Changes in share-based compensation awards (in thousands)      
Outstanding, end of year 28    
Additional disclosures      
Aggregate intrinsic value, outstanding, end of year $ 1,513    
Weighted-average remaining contractual term, outstanding, end of year 7 months    
Fair value per unit, end of year $ 54.54    
Cash payments to settle restricted stock units $ 120 $ 25 $ 64
Restricted shares [Member]      
Changes in share-based compensation awards (in thousands)      
Outstanding, beginning of year 120 21 40
Granted 72 121 17
Vested (14) (11) (33)
Forfeited (8) (11) (3)
Outstanding, end of year 170 120 21
Weighted-average grant date fair value      
Outstanding, beginning of year $ 49.96 $ 35.24 $ 23.73
Granted 66.99 51.08 37.50
Vested 50.72 37.06 23.68
Forfeited 58.58 48.14 23.45
Outstanding, end of year $ 56.35 $ 49.96 $ 35.24
Additional disclosures      
Weighted-average remaining contractual term, outstanding, end of year 1 year 6 months    
Fair value, awards vested $ 925 $ 624 $ 1,233
Performance share awards [Member]      
Assumptions, Monte Carlo simulation model      
Risk-free interest rate 1.00% 0.70%  
Dividend yield 1.90% 2.40%  
Expected volatility 22.70% 30.50%  
Changes in share-based compensation awards (in thousands)      
Outstanding, beginning of year 69 0  
Granted 62 74  
Forfeited (9) (5)  
Outstanding, end of year 122 69 0
Weighted-average grant date fair value      
Outstanding, beginning of year $ 50.14 $ 0.00  
Granted 67.09 50.14  
Forfeited 58.28 50.14  
Outstanding, end of year $ 58.13 $ 50.14 $ 0.00
Additional disclosures      
Weighted-average remaining contractual term, outstanding, end of year 1 year 7 months