Leases - Additional Information (Details) - USD ($)	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Jan. 06, 2022	Dec. 31, 2021
Business Acquisition [Line Items]
Operating lease liabilities	$ 28,694,000			$ 16,523,000
Operating lease right-of-use assets	27,281,000			$ 15,222,000
Right-of-use assets obtained in exchange for new operating lease liabilities	$ 89,000	$ 109,000
Operating lease, weighted average remaining lease term	11 years 10 months 20 days			9 years 1 month 28 days
Lessee, operating lease, discount rate	3.01%			3.41%
Operating lease, lease not yet commenced	$ 0
1st Constitution Bancorp
Business Acquisition [Line Items]
Operating lease liabilities			$ 13,000,000
Operating lease right-of-use assets			$ 13,000,000
Right-of-use assets obtained in exchange for new operating lease liabilities	$ 13,000,000