Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation (Tables)

v2.4.0.6
Stock-Based Compensation (Tables)
6 Months Ended
Jun. 30, 2012
Share-based Compensation [Abstract]  
Summary Of Stock-Based Compensation Expense
Stock-based compensation expense consisted of the following (in thousands):
 
 
Three Months Ended June 30,
 
Six Months Ended June 30,
 
 
2012
 
2011
 
2012
 
2011
Stock options
 
$
869

 
$
885

 
$
1,777

 
$
1,727

Restricted stock units
 
1,322

 
1,106

 
2,526

 
2,077

Total
 
$
2,191

 
$
1,991

 
$
4,303

 
$
3,804

Schedule Of Weighted Average Assumptions
The following table presents the weighted average assumptions for stock options granted in the period:
 
Three Months Ended June 30,
 
Six Months Ended June 30,
 
2012
 
2011
 
2012
 
2011(1)
Expected term
7.69 years
 
7.27 years
 
4.79 years
 
5.13 years
Expected stock price volatility
29.66%
 
29.08%
 
32.20%
 
30.75%
Risk-free interest rate
1.09%
 
2.24%
 
0.89%
 
1.85%
Expected dividend yield
1.79%
 
1.34%
 
1.80%
 
1.31%
Weighted average grant date fair value
$12.85
 
$19.44
 
$11.57
 
$16.12
Schedule Of Weighted Average Assumptions For Restricted Stock Units
The following table presents the weighted average assumptions for restricted stock units granted in the period:
 
Three Months Ended June 30,
 
Six Months Ended June 30,
 
2012
 
2011
 
2012
 
2011
Vesting period
2.90 years
 
3.33 years
 
3.84 years
 
3.96 years
Expected dividend yield
1.78%
 
1.31%
 
1.79%
 
1.30%
Estimated average grant date fair value per restricted stock unit
$46.90
 
$64.06
 
$45.96
 
$59.06