Allowance for Credit Losses - Rollforward of the Reserve for Unfunded Commitments (Details) - Reserve for unfunded commitments - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Reserve for unfunded commitments:
Reserve for unfunded commitments, beginning balance	$ 36,199	$ 28,958	$ 33,835	$ 30,322
Provision			2,364	(1,364)
Reserve for unfunded commitments, ending balance	36,199	28,958	36,199	28,958
Commercial and Industrial
Reserve for unfunded commitments:
Reserve for unfunded commitments, beginning balance	7,153	9,308	7,811	8,615
Provision	(799)	(1,668)	(1,457)	(975)
Reserve for unfunded commitments, ending balance	6,354	7,640	6,354	7,640
Commercial real estate
Reserve for unfunded commitments:
Reserve for unfunded commitments, beginning balance	1,692	1,789	2,004	2,114
Provision	299	1,961	(13)	1,636
Reserve for unfunded commitments, ending balance	1,991	3,750	1,991	3,750
Construction
Reserve for unfunded commitments:
Reserve for unfunded commitments, beginning balance	8,952	8,046	7,470	8,963
Provision	837	(1,962)	2,319	(2,879)
Reserve for unfunded commitments, ending balance	9,789	6,084	9,789	6,084
Residential Lending: Residential Mortgage
Reserve for unfunded commitments:
Reserve for unfunded commitments, beginning balance	17	3	30	15
Provision	2	29	(11)	17
Reserve for unfunded commitments, ending balance	19	32	19	32
Home equity line
Reserve for unfunded commitments:
Reserve for unfunded commitments, beginning balance	18,336	9,766	16,483	10,546
Provision	(321)	1,657	1,532	877
Reserve for unfunded commitments, ending balance	18,015	11,423	18,015	11,423
Consumer Portfolio Segment [Member]
Reserve for unfunded commitments:
Reserve for unfunded commitments, beginning balance	49	46	37	69
Provision	(18)	(17)	(6)	(40)
Reserve for unfunded commitments, ending balance	$ 31	$ 29	$ 31	$ 29