Stock-Based Compensation Plans (Tables)

9 Months Ended

Sep. 30, 2019

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,
	2019		2018		2019		2018
	(In thousands)
Employees	$	7,706	$	3,654	$	18,267	$	10,739
Non-employee directors		238		296		802		812
Total stock-based compensation	$	7,944	$	3,950	$	19,069	$	11,551