Components of Net Periodic Benefit Costs (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 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	$ 10,000		$ 10,000
Pension Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	1,267	$ 1,872	5,199	$ 6,172
Interest cost	2,799	1,902	6,911	5,414
Expected return on plan assets	(7,183)	(6,661)	(22,375)	(19,297)
Amortization of Prior service cost	0	0	0	0
Amortization of Net loss	660	0	660	2,000
Net periodic (income) benefit cost	(2,457)	(2,887)	(9,605)	(5,711)
RIM Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	93	100	279	300
Interest cost	97	86	291	258
Expected return on plan assets	0	0	0	0
Amortization of Prior service cost	0	0	0	0
Amortization of Net loss	111	166	333	498
Net periodic (income) benefit cost	301	352	903	1,056
Post-retirement Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	122	130	319	390
Interest cost	185	141	508	423
Expected return on plan assets	0	0	0	0
Amortization of Prior service cost	0	0	0	0
Amortization of Net loss	78	153	234	459
Net periodic (income) benefit cost	385	424	1,061	1,272
Split-Dollar Life Insurance
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	130	141	383	423
Interest cost	158	125	453	375
Expected return on plan assets	0	0	0	0
Amortization of Prior service cost	14	14	42	42
Amortization of Net loss	151	191	453	573
Net periodic (income) benefit cost	453	471	1,331	1,413
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	$ 2	9	$ 6
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		6
Former RSI Bank President | RIM Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Net periodic (income) benefit cost	$ 16		$ 27