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Stock-Based Compensation Plans (Tables)
 6 Months Ended
Jun. 30, 2020
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]  
Stock-Based Compensation Expense

Total stock-based compensation expense was as follows:

 

 

 

Three Months Ended June 30,

 

 

Six Months Ended June 30,

 

 

 

2020

 

 

2019

 

 

2020

 

 

2019

 

 

 

(In thousands)

 

Employees

 

$

5,512

 

 

$

5,645

 

 

$

11,911

 

 

$

10,561

 

Non-employee directors

 

 

279

 

 

 

284

 

 

 

557

 

 

 

564

 

Total stock-based compensation

 

$

5,791

 

 

$

5,929

 

 

$

12,468

 

 

$

11,125