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Note 9 - Subordinated Debentures - Summary of Mandatory Redeemable Trust Preferred Securities (Details) - Subordinated Debt [Member] - Center Bancorp Statutory Trust II [Member] - USD ($) $ / shares in Units, $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2022 | Dec. 19, 2003
Securities issued | $ 5,000 | $ 5
Liquidation value (in dollars per share) | $ 1,000 |
Coupon rate | 2.85% |
Maturity | Jan. 23, 2034 |
Redeemable by issuer beginning | Jan. 23, 2009 |

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