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Note 13 - Subordinated Debentures (Details Textual) - Subordinated Debt [Member] - USD ($)				1 Months Ended	9 Months Ended	12 Months Ended
	Dec. 31, 2023	Jul. 03, 2023	Jun. 10, 2020	Dec. 31, 2003	Sep. 30, 2024	Dec. 31, 2023	Dec. 19, 2003
The 2020 Notes [Member]
Debt Instrument, Face Amount			$ 75,000,000
Debt Instrument, Interest Rate, Stated Percentage			5.75%
Secured Overnight Financing Rate (SOFR) [Member] | The 2020 Notes [Member]
Debt Instrument, Basis Spread on Variable Rate			5.605%
Center Bancorp Statutory Trust II [Member]
Debt Instrument, Face Amount	$ 5,000,000				$ 5,000,000	$ 5,000,000	$ 5,000,000
Proceeds from Issuance of Debt				$ 5,200,000
Debt Instrument, Interest Rate, Effective Percentage					8.37%
Center Bancorp Statutory Trust II [Member] | Secured Overnight Financing Rate (SOFR) [Member]
Debt Instrument, Basis Spread on Variable Rate		2.85%			2.85%	2.85%
Center Bancorp Statutory Trust II [Member] | Tenor Spread Adjustment [Member]
Debt Instrument, Basis Spread on Variable Rate	0.26161%	0.26161%			0.26161%

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- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

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- Definition

Face (par) amount of debt instrument at time of issuance.

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- Definition

Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

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Contractual interest rate for funds borrowed, under the debt agreement.

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- Definition

The cash inflow during the period from additional borrowings in aggregate debt. Includes proceeds from short-term and long-term debt.

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