Allowance for Credit Losses - Rollforward of the Reserve for Unfunded Commitments (Details) - Reserve for unfunded commitments - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Reserve for unfunded commitments:
Reserve for unfunded commitments, beginning balance	$ 33,835	$ 30,322
Provision	2,364	(1,364)
Reserve for unfunded commitments, ending balance	36,199	28,958
Commercial and Industrial
Reserve for unfunded commitments:
Reserve for unfunded commitments, beginning balance	7,811	8,615
Provision	(658)	693
Reserve for unfunded commitments, ending balance	7,153	9,308
Commercial real estate
Reserve for unfunded commitments:
Reserve for unfunded commitments, beginning balance	2,004	2,114
Provision	(312)	(325)
Reserve for unfunded commitments, ending balance	1,692	1,789
Construction
Reserve for unfunded commitments:
Reserve for unfunded commitments, beginning balance	7,470	8,963
Provision	1,482	(917)
Reserve for unfunded commitments, ending balance	8,952	8,046
Residential Lending: Residential Mortgage
Reserve for unfunded commitments:
Reserve for unfunded commitments, beginning balance	30	15
Provision	(13)	(12)
Reserve for unfunded commitments, ending balance	17	3
Home equity line
Reserve for unfunded commitments:
Reserve for unfunded commitments, beginning balance	16,483	10,546
Provision	1,853	(780)
Reserve for unfunded commitments, ending balance	18,336	9,766
Consumer Portfolio Segment [Member]
Reserve for unfunded commitments:
Reserve for unfunded commitments, beginning balance	37	69
Provision	12	(23)
Reserve for unfunded commitments, ending balance	$ 49	$ 46