Other Noncurrent Liabilities (Tables)

3 Months Ended

Mar. 31, 2022

Other Liabilities Disclosure [Abstract]

Summary of Other Noncurrent Liabilities

	December 31,		March 31,
	2021		2022
	(In thousands)
Reserve for uncertain tax positions	$	1,724	$	1,724
OPEB		787		718
Insurance claims and expenses		632		659
Other		347		322
Total	$	3,490	$	3,423