Other Noncurrent Assets, Net (Tables)

3 Months Ended

Mar. 31, 2019

Deferred Costs Capitalized Prepaid And Other Assets Disclosure [Abstract]

Summary of Other Noncurrent Assets

	December 31,		March 31,
	2018		2019
	(In thousands)
Restricted cash	$	1,003	$	1,006
Pension asset		1,898		1,986
Other		1,210		1,224
Total	$	4,111	$	4,216