Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation (Tables)

v3.8.0.1
Stock-Based Compensation (Tables)
 3 Months Ended
Mar. 31, 2018
Share-based Compensation [Abstract]  
Schedule Of Stock-Based Compensation Expense
Stock-based compensation expense consisted of the following (in thousands):
 
Three Months Ended March 31,
 
2018
 
2017
Stock options
$
1,072

 
$
1,004

Restricted stock units
2,041

 
1,937

Total
$
3,113

 
$
2,941

Schedule Of Weighted Average Assumptions For Employee Stock Options
The following table presents the weighted average assumptions for stock options granted in the periods:
 
Three Months Ended March 31,
 
2018
 
2017
Expected option term
4.31 years
 
4.34 years
Expected stock price volatility
28.48%
 
28.95%
Risk-free interest rate
2.43%
 
1.70%
Expected annual dividend yield
1.17%
 
1.30%
Weighted average grant date fair value
$18.10
 
$12.73
Schedule Of Weighted Average Assumptions For Restricted Stock Units
The following table presents the weighted average assumptions for restricted stock units granted in the periods:
 
Three Months Ended March 31,
 
2018
 
2017
Vesting period
4.00 years
 
3.91 years
Expected annual dividend yield
1.16%
 
1.31%
Estimated average grant date fair value per restricted stock unit
$71.99
 
$52.40