Stockholders' equity (Tables)

3 Months Ended

Mar. 31, 2024

Stockholders' equity

Schedule of Changes in Accumulated Other Comprehensive Loss

	Three months ended
	March 31,
	2023		2024
	(In thousands)
Accumulated other comprehensive loss, (net of tax and noncontrolling interest):
Currency translation:
Balance at beginning of period	$	(178,191)	$	(177,119)
Other comprehensive loss		(1,666)		(4,966)
Balance at end of period	$	(179,857)	$	(182,085)
Defined benefit pension plans:
Balance at beginning of period	$	(43,857)	$	(41,373)
Other comprehensive income -
Amortization of prior service cost and net losses included in   net periodic pension cost		393		379
Balance at end of period	$	(43,464)	$	(40,994)
OPEB plans:
Balance at beginning of period	$	(893)	$	(1,114)
Other comprehensive loss -
Amortization of net gain included in net periodic   OPEB cost		(60)		(47)
Balance at end of period	$	(953)	$	(1,161)
Marketable debt securities:
Balance at beginning of period	$	(50)	$	(15)
Other comprehensive income (loss) - unrealized gain (loss) arising during the period		(44)		15
Balance at end of period	$	(94)	$	—
Total accumulated other comprehensive loss:
Balance at beginning of period	$	(222,991)	$	(219,621)
Other comprehensive loss		(1,377)		(4,619)
Balance at end of period	$	(224,368)	$	(224,240)