Subsequent Event (Unaudited) (Details) - 1st Constitution Bancorp - Subsequent Event $ / shares in Units, $ in Thousands	Jan. 06, 2022 USD ($) branch $ / shares shares	Feb. 28, 2022 branch
Subsequent Event [Line Items]
Number of operating bank branches	25
Business combination, consideration transferred, equity interests issued and issuable, entity shares issued per acquiree share (in shares) | shares	1.3577
Consideration paid through common stock (in shares) | shares	14,020,495
Business acquisition, share price (in usd per share) | $ / shares	$ 25.55
Business acquisition, average strike price (in usd per share) | $ / shares	$ 15.95
Payments to acquire businesses, gross | $	$ 559
1st Constitution
Subsequent Event [Line Items]
Business acquisition, number of bank branches closed		3
Lakeland Bank
Subsequent Event [Line Items]
Business acquisition, number of bank branches closed		1