Years ended December 31,

2022

2023

2024

(In thousands)

Accumulated other comprehensive loss, net of tax:

Currency translation:

Balance at beginning of period

$

(171,235)

$

(178,191)

$

(177,119)

Other comprehensive income (loss)

(6,956)

1,072

(8,304)

Balance at end of period

$

(178,191)

$

(177,119)

$

(185,423)

Defined benefit pension plans:

Balance at beginning of period

$

(68,468)

$

(43,857)

$

(41,373)

Other comprehensive income (loss):

Amortization of prior service cost and net losses included in
net periodic pension cost

3,592

1,436

1,504

Net actuarial gain (loss) arising during the year

20,881

(3,094)

3,134

Plan settlement

138

4,142

69

Balance at end of period

$

(43,857)

$

(41,373)

$

(36,666)

OPEB plans:

Balance at beginning of period

$

(1,053)

$

(893)

$

(1,114)

Other comprehensive income (loss):

Amortization of net gain included in net periodic
OPEB cost

(369)

(357)

(195)

Net actuarial gain arising during the year

529

136

42

Balance at end of period

$

(893)

$

(1,114)

$

(1,267)

Marketable debt securities:

Balance at beginning of period

$

—

$

(50)

$

(15)

Other comprehensive income (loss) - unrealized gain (loss)
arising during the period

(50)

35

15

Balance at end of period

$

(50)

$

(15)

$

—

Total accumulated other comprehensive loss:

Balance at beginning of period

$

(240,756)

$

(222,991)

$

(219,621)

Other comprehensive income (loss)

17,765

3,370

(3,735)

Balance at end of period

$

(222,991)

$

(219,621)

$

(223,356)