Pension and Other Post Retirement Benefits (Tables)

9 Months Ended

Sep. 30, 2021

Pension Plans, Defined Benefit [Member]

Defined Benefit Plan Disclosure [Line Items]

Schedule of components of net periodic benefit costs - pension plans [Table Text Block]

Three Months Ended September 30,

Nine Months Ended September 30,

Other

Other

Postretirement

Postretirement

Pension Benefits

Benefits

Pension Benefits

Benefits

2021

2020

2021

2020

2021

2020

2021

2020

Service cost

$

289

$

1,227

$

(2)

$

2

$

921

$

3,565

$

1

$

5

Interest cost

1,078

1,527

(1)

25

3,262

4,782

20

77

Expected return on plan assets

(2,075)

(3,526)

—

—

(6,250)

(7,246)

—

—

Settlement charge

—

—

—

—

—

22,667

—

—

Actuarial loss amortization

737

626

(85)

15

2,449

2,288

(85)

46

Prior service cost amortization

3

(42)

—

—

8

(123)

—

—

Net periodic benefit cost

$

32

$

(188)

$

(88)

$

42

$

390

$

25,933

$

(64)

$

128