Components of Net Periodic Benefit Costs (Tables)

3 Months Ended

Mar. 31, 2022

Retirement Benefits [Abstract]

Schedule of Net Benefit Costs

Net periodic benefit (income) cost for Pension Plan, RIM Plan, Post-retirement Plan and Split-Dollar Life Insurance plan benefits for the three months ended March 31, 2022 and 2021, includes the following components:

	For the Three Months Ended March 31,
	Pension Plan				RIM Plan				Post-retirement Plan				Split-Dollar Life Insurance
	2022		2021		2022		2021		2022		2021		2022		2021		Affected Line Item in the Consolidated Statements of Income
	(In thousands)
Service cost	$	1,966	$	2,150	$	93	$	100	$	87	$	130	$	125	$	141	Compensation and employee benefits
Interest cost	2,031		1,756		97		86		150		141		142		125		Other non-interest expense
Expected return on plan assets	(7,559)		(6,318)		—		—		—		—		—		—		Other non-interest expense
Amortization:
Prior service cost	—		—		—		—		—		—		14		14		Other non-interest expense
Net loss	—		1,000		111		166		78		153		151		191		Other non-interest expense
Net periodic (income) benefit cost	$	(3,562)	$	(1,412)	$	301	$	352	$	315	$	424	$	432	$	471