Components of Net Periodic Benefit Costs (Details) - USD ($)	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Retirement Benefits [Abstract]
Years of employment benefits are based upon	5 years
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined contribution plan, employer contribution amount	$ 0
Pension Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	1,966,000	$ 2,150,000
Interest cost	2,031,000	1,756,000
Expected return on plan assets	(7,559,000)	(6,318,000)
Amortization of Prior service cost	0	0
Amortization of Net loss	0	1,000,000
Net periodic (income) benefit cost	(3,562,000)	(1,412,000)
RIM Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	93,000	100,000
Interest cost	97,000	86,000
Expected return on plan assets	0	0
Amortization of Prior service cost	0	0
Amortization of Net loss	111,000	166,000
Net periodic (income) benefit cost	301,000	352,000
Post-retirement Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	87,000	130,000
Interest cost	150,000	141,000
Expected return on plan assets	0	0
Amortization of Prior service cost	0	0
Amortization of Net loss	78,000	153,000
Net periodic (income) benefit cost	315,000	424,000
Split-Dollar Life Insurance
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	125,000	141,000
Interest cost	142,000	125,000
Expected return on plan assets	0	0
Amortization of Prior service cost	14,000	14,000
Amortization of Net loss	151,000	191,000
Net periodic (income) benefit cost	432,000	471,000
Former Roselle Bank President | RIM Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Net periodic (income) benefit cost	3,000	$ 2,000
Former Freehold Bank President | RIM Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Net periodic (income) benefit cost	$ 2,000