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Guarantees, Commitments, and Contingencies - Narrative (Details) $ in Thousands		3 Months Ended	9 Months Ended		12 Months Ended		33 Months Ended
	Nov. 30, 2021 USD ($) Apartment Shop Building	Jun. 30, 2020 Apartment	Sep. 30, 2022 USD ($)	Sep. 30, 2021 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Sep. 30, 2022 USD ($)
Reserve for Off-balance Sheet Activities
Commitments, Contingencies and Guarantees [Line Items]
Valuation allowances and reserves, balance			$ 85		$ 72		$ 85
PPP Loans | Small Business Administration
Commitments, Contingencies and Guarantees [Line Items]
Nonrefundable loan processing fees received			3,700		18,000	$ 20,900	$ 42,600
Cumberland County, Pennsylvania
Commitments, Contingencies and Guarantees [Line Items]
Number of apartments under the project | Apartment		39
Limited partner capital contribution				$ 10,800
Total LIHTCs amount awarded for the project				1,200
Total anticipated LIHTCs amount under the housing project				$ 12,000
Project investment amortization period				10 years
Riverview
Commitments, Contingencies and Guarantees [Line Items]
Number of apartments under the project | Apartment	17
Limited partner capital contribution	$ 4,400
Total LIHTCs amount awarded for the project	484
Total anticipated LIHTCs amount under the housing project	$ 4,800
Project investment amortization period	10 years
Number of buildings | Building	3
Number of shops under the project | Shop	2
Principal amount of construction loan	$ 3,500
Debt instrument, interest rate, effective percentage	5.50%
Term of construction loan	24 months
Financial Standby Letters of Credit
Commitments, Contingencies and Guarantees [Line Items]
Commitments to extend credit			$ 51,700		$ 55,600

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