Pension and Other Postretirement Plans (Tables)

9 Months Ended

Sep. 30, 2021

Compensation and Retirement Disclosure [Abstract]

Schedule of Net Periodic Benefit Costs

The following table presents the components of net periodic benefit costs recognized.

	Three Months Ended						Nine Months Ended
	September 30,						September 30,
(In thousands)	2021			2020			2021			2020
Pension Benefits
Components of net periodic benefit cost:
Service cost	$	1,432		$	1,324		$	4,296		$	3,972
Interest cost		2,280			3,052			6,840			9,157
Expected return on assets		(7,372	)		(6,807	)		(22,115	)		(20,422	)
Amortization of:
Prior service credit		(31	)		(31	)		(93	)		(93	)
Actuarial loss		1,662			1,339			4,985			4,018
Net periodic benefit (credit) cost	$	(2,029	)	$	(1,123	)	$	(6,087	)	$	(3,368	)
Postretirement Benefits
Components of net periodic benefit cost:
Service cost	$	362		$	316		$	1,086		$	948
Interest cost		387			570			1,161			1,709
Expected return on assets		(819	)		(789	)		(2,457	)		(2,366	)
Amortization of:
Transition obligation		1			1			2			2
Prior service credit		(379	)		(667	)		(1,138	)		(2,001	)
Actuarial loss		123			55			370			165
Net periodic benefit (credit) cost	$	(325	)	$	(514	)	$	(976	)	$	(1,543	)