Stock-Based Compensation Plans (Tables)

9 Months Ended

Sep. 30, 2021

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Stock-Based Compensation Expense

Total stock-based compensation expense was as follows:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2021		2020		2021		2020
	(In thousands)
Employees	$	6,444	$	6,133	$	19,467	$	18,044
Non-employee directors		310		318		845		875
Total stock-based compensation	$	6,754	$	6,451	$	20,312	$	18,919