Acquisitions - Narrative (Details)		3 Months Ended		6 Months Ended
	Jan. 06, 2022 USD ($) branch lease $ / shares shares	Jun. 30, 2022 USD ($)	Jun. 30, 2021 USD ($)	Jun. 30, 2022 USD ($)	Jun. 30, 2021 USD ($)	Dec. 31, 2021 USD ($)
Business Acquisition [Line Items]
Operating lease right-of-use assets		$ 26,244,000		$ 26,244,000		$ 15,222,000
Operating lease liabilities		27,639,000		27,639,000		$ 16,523,000
Merger related expenses		0	$ 0	4,585,000	$ 0
1st Constitution Bancorp
Business Acquisition [Line Items]
Number of operating bank branches | branch	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	$ 559,000
Number of operating bank branches, owned premises | branch	8
Number of lease obligations | lease	17
Operating lease right-of-use assets	$ 13,000,000
Operating lease liabilities	13,000,000
Other intangible assets	$ 9,018,000
Useful life	10 years
Business combination, integration related costs		$ 0	$ 0	$ 4,600,000	$ 0