Pension and Postretirement Benefits (Tables)

9 Months Ended

Sep. 30, 2020

General Discussion Of Pension And Other Postretirement Benefits [Abstract]

Pension [Table Text Block]

Three Months Ended September 30,

Nine Months Ended September 30,

Other

Other

Postretirement

Postretirement

Pension Benefits

Benefits

Pension Benefits

Benefits

2020

2019

2020

2019

2020

2019

2020

2019

Service cost

$

1,227

$

993

$

2

$

2

$

3,565

$

2,956

$

5

$

5

Interest cost

1,527

1,852

25

36

4,782

4,068

77

107

Expected return on plan assets

(3,526)

(2,140)

—

—

(7,246)

(4,102)

—

—

Settlement charge

—

—

—

—

22,667

—

—

—

Actuarial loss amortization

626

799

15

—

2,288

2,348

46

—

Prior service cost amortization

(42)

(34)

—

—

(123)

(117)

—

—

Net periodic benefit (income)

cost

$

(188)

$

1,470

$

42

$

38

$

25,933

$

5,153

$

128

$

112