Note 11 - 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	1 Months Ended	6 Months Ended
	Dec. 31, 2003	Jun. 30, 2022
Securities issued	$ 5	$ 5,000
Liquidation value (in dollars per share)		$ 1,000
Coupon rate		2.85%
Maturity	Jan. 23, 2034	Jan. 23, 2034
Redeemable by issuer beginning		Jan. 23, 2009