Stock-Based Compensation Plans (Tables)

6 Months Ended

Jun. 30, 2018

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Stock-Based Compensation Expense

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

	Three Months Ended June 30,				Six Months Ended June 30,
	2018		2017		2018		2017
	(In thousands)
Employees	$	3,393	$	3,292	$	7,085	$	6,993
Non-employee directors		257		232		516		475
Total stock-based compensation	$	3,650	$	3,524	$	7,601	$	7,468