Pension and Other Postretirement Benefits (Tables)

9 Months Ended

Sep. 30, 2019

Retirement Benefits [Abstract]

Schedule of Net Benefit Costs

Pension and other postretirement benefits expenses consisted of the following:

	Three Months Ended September 30,						Nine Months Ended September 30,
Pensions	2019			2018			2019			2018
Service cost	$	1,356		$	1,491		$	4,064		$	4,479
Interest cost	4,539			4,336			13,647			13,028
Expected return on plan assets	(7,389		)	(7,615		)	(21,816		)	(22,392		)
Amortization of prior service cost	101			141			302			422
Amortization of actuarial losses	2,215			2,879			6,658			8,719
Settlement loss	93			—			340			—
Net periodic benefit cost	$	915		$	1,232		$	3,195		$	4,256

	Three Months Ended September 30,				Nine Months Ended September 30,
Other Postretirement Benefits	2019		2018		2019		2018
Service cost	$	18	$	22	$	53	$	64
Interest cost	335		338		1,008		1,019
Amortization of prior service cost	6		5		19		15
Amortization of actuarial losses	3		135		10		421
Net periodic benefit cost	$	362	$	500	$	1,090	$	1,519