Components of Net Periodic Benefit Cost (Tables)

6 Months Ended

Jun. 30, 2023

Retirement Benefits [Abstract]

Schedule of Net Benefit Costs

Net periodic (income) benefit cost for the Pension Plan, RIM Plan, Post-retirement Plan and Split-Dollar Life Insurance plan benefits for the three and six months ended June 30, 2023 and 2022, includes the following components:

	For the Three Months Ended June 30,
	Pension Plan				RIM Plan				Post-retirement Plan				Split-Dollar Life Insurance
	2023		2022		2023		2022		2023		2022		2023		2022		Affected Line Item in the Consolidated Statements of Income
	(In thousands)
Service cost	$	1,199	$	1,966	$	69	$	93	$	54	$	87	$	69	$	128	Compensation and employee benefits
Interest cost	2,790		2,031		158		97		242		150		204		153		Other non-interest expense
Expected return on plan assets	(7,480)		(7,559)		—		—		—		—		—		—		Other non-interest expense
Amortization:
Prior service cost	—		—		14		—		—		—		14		14		Other non-interest expense
Net loss	—		—		—		111		—		78		—		151		Other non-interest expense
Net periodic (income) benefit cost	$	(3,491)	$	(3,562)	$	241	$	301	$	296	$	315	$	287	$	446

	For the Six Months Ended June 30,
	Pension Plan				RIM Plan				Post-retirement Plan				Split-Dollar Life Insurance
	2023		2022		2023		2022		2023		2022		2023		2022		Affected Line Item in the Consolidated Statements of Income
	(In thousands)
Service cost	$	2,398	$	3,932	$	138	$	186	$	108	$	174	$	139	$	253	Compensation and employee benefits
Interest cost	5,581		4,062		316		194		485		300		409		295		Other non-interest expense
Expected return on plan assets	(14,960)		(15,118)		—		—		—		—		—		—		Other non-interest expense
Amortization:
Prior service cost	—		—		28		—		—		—		28		28		Other non-interest expense
Net loss	—		—		—		222		—		156		—		302		Other non-interest expense
Net periodic (income) benefit cost	$	(6,981)	$	(7,124)	$	482	$	602	$	593	$	630	$	576	$	878

Net periodic (income) benefit cost for the Pension Plan and Post-retirement Plan for the three and six months ended June 30, 2023 and 2022, includes the following components:

	For the Three Months Ended June 30,
	Pension Plan				Post-retirement Plan				Affected Line Item in the Consolidated Statements of Income
	2023		2022		2023		2022
	(In thousands)
Service cost	$	—	$	—	$	17	$	23	Compensation and employee benefits
Interest cost	76		50		27		23		Other non-interest expense
Expected return on plan assets	(122)		(74)		—		—		Other non-interest expense
Amortization:
Net (gain)	—		—		(15)		—		Other non-interest expense
Net periodic (income) benefit cost	$	(46)	$	(24)	$	29	$	46

	For the Six Months Ended June 30,
	Pension Plan				Post-retirement Plan				Affected Line Item in the Consolidated Statements of Income
	2023		2022		2023		2022
	(In thousands)
Service cost	$	—	$	—	$	34	$	23	Compensation and employee benefits
Interest cost	152		50		53		23		Other non-interest expense
Expected return on plan assets	(243)		(74)		—		—		Other non-interest expense
Amortization:
Net (gain)	—		—		(30)		—		Other non-interest expense
Net periodic (income) benefit cost	$	(91)	$	(24)	$	57	$	46