Three Months Ended

Nine Months Ended

September 30,

September 30,

(In thousands)

2023

2022

2023

2022

Pension Benefits

Components of net periodic benefit cost:

Service cost

$

723

$

1,266

$

2,169

$

3,798

Interest cost

4,330

2,791

12,989

8,371

Expected return on assets

(6,312

)

(7,848

)

(18,936

)

(23,543

)

Amortization of:

Prior service credit

—

(5

)

—

(15

)

Actuarial loss

440

604

1,320

1,812

Net periodic benefit (credit) cost

$

(819

)

$

(3,192

)

$

(2,458

)

$

(9,577

)

Postretirement Benefits

Components of net periodic benefit cost:

Service cost

$

195

$

323

$

585

$

970

Interest cost

827

485

2,481

1,455

Expected return on assets

(649

)

(842

)

(1,946

)

(2,524

)

Amortization of:

Transition obligation

1

1

2

2

Prior service credit

—

(74

)

—

(223

)

Actuarial (gain) loss

(48

)

37

(143

)

109

Net periodic benefit (credit) cost

$

326

$

(70

)

$

979

$

(211

)