Other Noncurrent Liabilities (Tables)

6 Months Ended

Jun. 30, 2019

Other Liabilities Disclosure [Abstract]

Summary of Other Noncurrent Liabilities

	December 31,		June 30,
	2018		2019
	(In thousands)
Reserve for uncertain tax positions	$	7,312	$	7,312
OPEB		1,519		1,423
Insurance claims and expenses		621		597
Other		463		462
Total	$	9,915	$	9,794