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Note 13 - Subordinated Debentures - Summary of Mandatory Redeemable Trust Preferred Securities (Details) - Subordinated Debt [Member] - Center Bancorp Statutory Trust II [Member] - USD ($)			9 Months Ended	12 Months Ended
	Dec. 31, 2023	Jul. 03, 2023	Sep. 30, 2024	Dec. 31, 2023	Dec. 19, 2003
Securities issued	$ 5,000,000		$ 5,000,000	$ 5,000,000	$ 5,000,000
Liquidation value (in dollars per share)	$ 1,000		$ 1,000	$ 1,000
Maturity			Jan. 23, 2034	Jan. 23, 2034
Redeemable by issuer beginning			Jan. 23, 2009	Jan. 23, 2009
Tenor Spread Adjustment [Member]
Coupon rate	0.26161%	0.26161%	0.26161%
Secured Overnight Financing Rate (SOFR) [Member]
Coupon rate		2.85%	2.85%	2.85%

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