XML 17 R37.htm IDEA: XBRL DOCUMENT v2.4.0.6
STOCK-BASED COMPENSATION PLANS (Details 2) (USD $)
3 Months Ended
Mar. 31, 2013
Stock option
 
Assumptions used in valuation related to stock option grants  
Dividend yield (as a percent) 1.40%
Expected option life 4 years 9 months 18 days
Volatility factor percentage of market price 40.10%
Discount rate (as a percent) 0.90%
Stock option | Minimum
 
Weighted Average Grant-Date Fair Value  
Vesting period 4 years
Stock option | Maximum
 
Weighted Average Grant-Date Fair Value  
Vesting period 5 years
2011 Stock Plan | Restricted Stock
 
Restricted stock and restricted stock units  
Outstanding at the beginning of the period (in shares) 123,941
Granted (in shares) 5,526
Forfeited (in shares) (2,225)
Outstanding at the end of the period (in shares) 127,242
Weighted Average Grant-Date Fair Value  
Outstanding at the beginning of the period (in dollars per share) 24.24
Granted (in dollars per share) 40.64
Forfeited (in dollars per share) 29.06
Outstanding at the end of the period (in dollars per share) 24.87
Vested (in shares) 0
2011 Stock Plan | Time Vesting Restricted Stock Units
 
Restricted stock and restricted stock units  
Outstanding at the beginning of the period (in shares) 171,937
Granted (in shares) 7,622
Outstanding at the end of the period (in shares) 179,559
Weighted Average Grant-Date Fair Value  
Outstanding at the beginning of the period (in dollars per share) 36.16
Granted (in dollars per share) 41.52
Outstanding at the end of the period (in dollars per share) 36.39
Vesting period 3 years
Vested (in shares) 0
2011 Stock Plan | Performance Vesting Restricted Stock Units
 
Restricted stock and restricted stock units  
Granted (in shares) 45,327
Outstanding at the end of the period (in shares) 45,327
Weighted Average Grant-Date Fair Value  
Granted (in dollars per share) 42.19
Outstanding at the end of the period (in dollars per share) 42.19
Vested (in shares) 0
2011 Stock Plan | Performance Vesting Restricted Stock Units | Minimum
 
Weighted Average Grant-Date Fair Value  
Vesting percentage 0.00%
2011 Stock Plan | Performance Vesting Restricted Stock Units | Maximum
 
Weighted Average Grant-Date Fair Value  
Vesting percentage 200.00%