Loans and Allowance for Credit Losses - Summary of the Modifications Which Occurred During the Periods and the Change in the Recorded Investment Subsequent to the Modifications Occurring (Details) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2023 USD ($) contract	Sep. 30, 2022 USD ($)	Sep. 30, 2023 USD ($) contract	Sep. 30, 2022 USD ($)	Dec. 31, 2022 loan
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts	21		38		257
Pre- Modification Outstanding Recorded Investment	$ 5,687		$ 9,636
Post-Modification Modification Outstanding Recorded Investment	$ 5,687	$ 5,687	$ 9,644	$ 9,644
Commercial and industrial | Commercial Portfolio Segment
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts	3		4		11
Pre- Modification Outstanding Recorded Investment	$ 2,997		$ 5,415
Post-Modification Modification Outstanding Recorded Investment	$ 2,997		$ 5,415
Business banking | Commercial Portfolio Segment
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts	9		20		33
Pre- Modification Outstanding Recorded Investment	$ 284		$ 854
Post-Modification Modification Outstanding Recorded Investment	$ 284		$ 862
Residential real estate | Residential Real Estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts	5		8		142
Pre- Modification Outstanding Recorded Investment	$ 1,170		$ 1,899
Post-Modification Modification Outstanding Recorded Investment	$ 1,170		$ 1,899
Consumer home equity | Consumer Portfolio Segment
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Contracts	4		6		70
Pre- Modification Outstanding Recorded Investment	$ 1,236		$ 1,468
Post-Modification Modification Outstanding Recorded Investment	$ 1,236		$ 1,468