Allowance for Credit Losses - Rollforward of the Reserve for Unfunded Commitments (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Reserve for unfunded commitments:
Reserve for unfunded commitments, beginning balance	$ 28,958	$ 34,103
Provision		(4,881)
Reserve for unfunded commitments, ending balance	28,958	29,222	$ 28,958	$ 29,222
Commercial and Industrial
Reserve for unfunded commitments:
Reserve for unfunded commitments, beginning balance	9,308	16,129
Provision	(1,668)	(3,321)
Reserve for unfunded commitments, ending balance	7,640	12,808	7,640	12,808
Commercial real estate
Reserve for unfunded commitments:
Reserve for unfunded commitments, beginning balance	1,789	1,112
Provision	1,961	(134)
Reserve for unfunded commitments, ending balance	3,750	978	3,750	978
Construction
Reserve for unfunded commitments:
Reserve for unfunded commitments, beginning balance	8,046	8,313
Provision	(1,962)	(440)
Reserve for unfunded commitments, ending balance	6,084	7,873	6,084	7,873
Residential mortgage
Reserve for unfunded commitments:
Reserve for unfunded commitments, beginning balance	3
Provision	29
Reserve for unfunded commitments, ending balance	32		32
Home equity line
Reserve for unfunded commitments:
Reserve for unfunded commitments, beginning balance	9,766	8,500
Provision	1,657	(979)
Reserve for unfunded commitments, ending balance	11,423	7,521	11,423	7,521
Consumer
Reserve for unfunded commitments:
Reserve for unfunded commitments, beginning balance	46	49
Provision	(17)	(7)
Reserve for unfunded commitments, ending balance	29	42	29	42
Reserve for unfunded commitments
Reserve for unfunded commitments:
Reserve for unfunded commitments, beginning balance			30,322	30,603
Provision			(1,364)	(1,381)
Reserve for unfunded commitments, ending balance	28,958	29,222	28,958	29,222
Reserve for unfunded commitments | Commercial and Industrial
Reserve for unfunded commitments:
Reserve for unfunded commitments, beginning balance			8,615	11,719
Provision			(975)	1,089
Reserve for unfunded commitments, ending balance	7,640	12,808	7,640	12,808
Reserve for unfunded commitments | Commercial real estate
Reserve for unfunded commitments:
Reserve for unfunded commitments, beginning balance			2,114	1,328
Provision			1,636	(350)
Reserve for unfunded commitments, ending balance	3,750	978	3,750	978
Reserve for unfunded commitments | Construction
Reserve for unfunded commitments:
Reserve for unfunded commitments, beginning balance			8,963	9,037
Provision			(2,879)	(1,164)
Reserve for unfunded commitments, ending balance	6,084	7,873	6,084	7,873
Reserve for unfunded commitments | Residential mortgage
Reserve for unfunded commitments:
Reserve for unfunded commitments, beginning balance			15	2
Provision			17	(2)
Reserve for unfunded commitments, ending balance	32		32
Reserve for unfunded commitments | Home equity line
Reserve for unfunded commitments:
Reserve for unfunded commitments, beginning balance			10,546	8,452
Provision			877	(931)
Reserve for unfunded commitments, ending balance	11,423	7,521	11,423	7,521
Reserve for unfunded commitments | Consumer
Reserve for unfunded commitments:
Reserve for unfunded commitments, beginning balance			69	65
Provision			(40)	(23)
Reserve for unfunded commitments, ending balance	$ 29	$ 42	$ 29	$ 42