Loans Receivables and Allowance for Loan and Lease Losses - Narrative (Details)	12 Months Ended
	Dec. 31, 2022 USD ($) loan	Dec. 31, 2022 USD ($) loan	Dec. 31, 2022 USD ($) loan	Dec. 31, 2022 USD ($) loan transaction	Dec. 31, 2022 USD ($) loan	Dec. 31, 2022 USD ($) loan modification	Dec. 31, 2022 USD ($) default_loan loan	Dec. 31, 2021 USD ($) loan	Dec. 31, 2021 USD ($) loan transaction	Dec. 31, 2021 USD ($) loan	Dec. 31, 2021 USD ($) modification loan	Dec. 31, 2021 USD ($) default_loan loan	Dec. 31, 2020 USD ($)	Oct. 01, 2021	Jan. 01, 2021
Accounts, Notes, Loans and Financing Receivable [Line Items]
Purchased credit impaired loans	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0
Deteriorated loan transactions | transaction				0					0
Purchased credit impaired loans change													$ 2,000
Loans purchased		141,412,000						89,338,000					32,785,000
Maximum period of credit extension	18 months
Loans receivable, term to reset to FHLB rate	5 years
Period for charged off of open-end credits	180 days
Period for charged off of close-end credits	120 days
Interest lost on nonaccrual loans		372,000						802,000					904,000
Maximum period for charged off of consumer installment loans	180 days
Number of contract modifications					6	0				7	0
Number of contracts in default | default_loan							0					0
Commitments to advance additional funds	$ 0	0	0	$ 0	$ 0	$ 0	$ 0	0	$ 0	$ 0	$ 0	$ 0
Impaired loans	19,300,000	19,300,000	19,300,000	19,300,000	19,300,000	19,300,000	19,300,000	23,800,000	23,800,000	23,800,000	23,800,000	23,800,000
Impaired loans allowance	$ 6,000,000	$ 6,000,000	$ 6,000,000	$ 6,000,000	$ 6,000,000	$ 6,000,000	$ 6,000,000	$ 2,300,000	$ 2,300,000	$ 2,300,000	$ 2,300,000	$ 2,300,000
Number of impaired loans | loan	32	32	32	32	32	32	32	34	34	34	34	34
Individually evaluated for impairment | loan	21	21	21	21	21	21	21	23	23	23	23	23
Number of loans collectively evaluated for impairment | loan	11	11	11	11	11	11	11	11	11	11	11	11
Threshold balance	$ 100,000	$ 100,000	$ 100,000	$ 100,000	$ 100,000	$ 100,000	$ 100,000	$ 100,000	$ 100,000	$ 100,000	$ 100,000	$ 100,000
Collectively evaluated for impairment, amount	371,000	371,000	371,000	371,000	371,000	371,000	371,000	590,000	590,000	590,000	590,000	590,000
Allowance for credit losses, collectively evaluated for impairment	$ 2,000	$ 2,000	$ 2,000	$ 2,000	$ 2,000	$ 2,000	$ 2,000	$ 7,000	$ 7,000	$ 7,000	$ 7,000	$ 7,000
Discount to appraisal value	5.80%	5.80%	5.80%	5.80%	5.80%	5.80%	5.80%
Discount of appraisal value, selling costs	8.00%	8.00%	8.00%	8.00%	8.00%	8.00%	8.00%
SBA Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of principal balance guaranteed								75.00%	75.00%	75.00%	75.00%	75.00%		75.00%	90.00%
Syndicated and Leveraged Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	$ 5,800,000	$ 5,800,000	$ 5,800,000	$ 5,800,000	$ 5,800,000	$ 5,800,000	$ 5,800,000	$ 19,600,000	$ 19,600,000	$ 19,600,000	$ 19,600,000	$ 19,600,000
Non-Accrual Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Impaired financing receivable, interest income, cash basis		329,000						377,000					$ 156,000
Number of contract modifications | loan					2					3
Commercial Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Maximum percentage of credit extension based on market value of collateral			75.00%
Loans purchased		20,700,000						0
Number of contract modifications | loan					1					1
Multi-family Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Maximum percentage of credit extension based on market value of collateral			80.00%
Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of maximum loan to value			75.00%
Residential Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans purchased		0						72,300,000
Number of contract modifications | loan					3					3
Consumer and Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of contract modifications | loan					2					3
Consumer and Other | Unsecured Consumer Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans purchased		90,100,000						17,000,000
Loans receivable	$ 78,900,000	$ 78,900,000	$ 78,900,000	$ 78,900,000	$ 78,900,000	$ 78,900,000	$ 78,900,000	15,700,000	15,700,000	$ 15,700,000	15,700,000	15,700,000
Interest rate on loans receivable	8.70%	8.70%	8.70%	8.70%	8.70%	8.70%	8.70%
Charge-offs		$ 1,600,000						0
Consumer and Other | HELOC Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	$ 30,600,000	30,600,000	$ 30,600,000	$ 30,600,000	$ 30,600,000	$ 30,600,000	$ 30,600,000	0	0	0	0	0
Construction to Permanent - CRE | Minimum
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable term	20 years
Construction to Permanent - CRE | Maximum
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable term	25 years
Commercial and Industrial Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable								27,100,000	27,100,000	27,100,000	27,100,000	27,100,000
Loan receivable, reversal	$ (800,000)	(800,000)	(800,000)	(800,000)	(800,000)	(800,000)	(800,000)
Commercial and Industrial Loans | SBA CARES Act Paycheck Protection Program
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	$ 31,700,000	$ 31,700,000	$ 31,700,000	$ 31,700,000	$ 31,700,000	$ 31,700,000	$ 31,700,000	$ 919,000	$ 919,000	$ 919,000	$ 919,000	$ 919,000