Retirement and Postretirement Benefit Plans (Tables)

3 Months Ended

Mar. 31, 2021

Compensation And Retirement Disclosure [Abstract]

Net Periodic Benefit Cost Components

Net periodic benefit (credit) cost for our pension and other postretirement benefit plans consisted of the following:

	Pension Plans
	Three Months Ended March 31,
	2021			2020
Interest cost	$	687		$	1,097
Expected return on plan assets		(1,916	)		(1,855	)
Amortization of net loss		850			581
Settlement loss recognized		500			—
Net periodic benefit cost (credit)	$	121		$	(177	)

	Other Post Retirement Plans
	Three Months Ended March 31,
	2021		2020
Service cost	$	19	$	17
Interest cost		68		107
Amortization of prior service cost		11		11
Amortization of net loss		—		(2	)
Net periodic benefit cost	$	98	$	133