Stock-Based Compensation Plans (Tables)

9 Months Ended

Sep. 30, 2018

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Stock-Based Compensation Expense

Stock-based compensation expense for the three and nine months ended September 30, 2018 and 2017 was as follows:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2018		2017		2018		2017
	(In thousands)
Employees	$	3,654	$	3,280	$	10,739	$	10,273
Non-employee directors		296		241		812		716
Total stock-based compensation	$	3,950	$	3,521	$	11,551	$	10,989