Years ended December 31,

2020

2021

2022

(In thousands)

Accumulated other comprehensive loss, net of tax:

Currency translation:

Balance at beginning of period

$

(172,843)

$

(169,575)

$

(171,235)

Other comprehensive income (loss)

3,268

(1,660)

(6,956)

Balance at end of period

$

(169,575)

$

(171,235)

$

(178,191)

Defined benefit pension plans:

Balance at beginning of period

$

(78,257)

$

(80,704)

$

(68,468)

Other comprehensive income (loss):

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

4,330

4,813

3,592

Net actuarial gain (loss) arising during the year

(6,777)

7,423

20,881

Plan settlement

—

138

Balance at end of period

$

(80,704)

$

(68,468)

$

(43,857)

OPEB plans and other:

Balance at beginning of period

$

(590)

$

(910)

$

(1,053)

Other comprehensive income (loss):

Amortization of net gain included in net periodic
OPEB cost

(320)

(143)

(369)

Net actuarial gain arising during the year

—

529

Change in value of debt securities

—

(50)

Balance at end of period

$

(910)

$

(1,053)

$

(943)

Total accumulated other comprehensive loss:

Balance at beginning of period

$

(251,690)

$

(251,189)

$

(240,756)

Other comprehensive income

501

10,433

17,765

Balance at end of period

$

(251,189)

$

(240,756)

$

(222,991)