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Loans - Summary of Purchased Loans Pools (Details) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2023 USD ($) Segment	Dec. 31, 2022 USD ($) Segment
Accounts Notes And Loans Receivable [Line Items]
Original Balance	$ 230,200	$ 230,200
Current Balance	111,670	115,200
Unamortized Premium/ (Discount)	$ (6,908)	$ (7,004)
Number of Loans | Segment	3,856	4,063
Cumulative net charge-offs	$ 379	$ 310
Automobile Loans [Member]
Accounts Notes And Loans Receivable [Line Items]
Original Balance	50,400	50,400
Current Balance	3,400	4,200
Unamortized Premium/ (Discount)	$ 11	$ 128
Number of Loans | Segment	467	537
Cumulative net charge-offs	$ 266	$ 247
Automobile Loans [Member] | Minimum [Member]
Accounts Notes And Loans Receivable [Line Items]
Maturity Range	0 years	0 years
Automobile Loans [Member] | Maximum [Member]
Accounts Notes And Loans Receivable [Line Items]
Maturity Range	4 years	4 years
Commercial and Industrial Loans [Member]
Accounts Notes And Loans Receivable [Line Items]
Original Balance	$ 6,800	$ 6,800
Current Balance	$ 2,000	$ 2,100
Number of Loans | Segment	21	22
Commercial and Industrial Loans [Member] | Minimum [Member]
Accounts Notes And Loans Receivable [Line Items]
Maturity Range	3 years	3 years
Commercial and Industrial Loans [Member] | Maximum [Member]
Accounts Notes And Loans Receivable [Line Items]
Maturity Range	7 years	7 years
Home Equity Line of Credit [Member]
Accounts Notes And Loans Receivable [Line Items]
Original Balance	$ 21,900	$ 21,900
Current Balance	5,700	6,000
Unamortized Premium/ (Discount)	$ 178	$ 189
Number of Loans | Segment	144	143
Home Equity Line of Credit [Member] | Minimum [Member]
Accounts Notes And Loans Receivable [Line Items]
Maturity Range	1 year	1 year
Home Equity Line of Credit [Member] | Maximum [Member]
Accounts Notes And Loans Receivable [Line Items]
Maturity Range	27 years	27 years
Unsecured Consumer Loan Pool 2 [Member]
Accounts Notes And Loans Receivable [Line Items]
Original Balance	$ 26,600	$ 26,600
Current Balance	1,200	1,500
Unamortized Premium/ (Discount)	$ 8	$ 11
Number of Loans | Segment	229	320
Unsecured Consumer Loan Pool 2 [Member] | Minimum [Member]
Accounts Notes And Loans Receivable [Line Items]
Maturity Range	0 years	0 years
Unsecured Consumer Loan Pool 2 [Member] | Maximum [Member]
Accounts Notes And Loans Receivable [Line Items]
Maturity Range	2 years	2 years
Residential Mortgage [Member]
Accounts Notes And Loans Receivable [Line Items]
Original Balance	$ 4,300	$ 4,300
Current Balance	3,700	3,900
Unamortized Premium/ (Discount)	$ 236	$ 240
Number of Loans | Segment	49	49
Residential Mortgage [Member] | Minimum [Member]
Accounts Notes And Loans Receivable [Line Items]
Maturity Range	16 years	16 years
Residential Mortgage [Member] | Maximum [Member]
Accounts Notes And Loans Receivable [Line Items]
Maturity Range	22 years	22 years
Unsecured Consumer Loan Pool 1 [Member]
Accounts Notes And Loans Receivable [Line Items]
Original Balance	$ 5,400	$ 5,400
Current Balance	$ 1,400	$ 1,600
Number of Loans | Segment	48	50
Unsecured Consumer Loan Pool 1 [Member] | Minimum [Member]
Accounts Notes And Loans Receivable [Line Items]
Maturity Range	1 year	1 year
Unsecured Consumer Loan Pool 1 [Member] | Maximum [Member]
Accounts Notes And Loans Receivable [Line Items]
Maturity Range	4 years	4 years
Unsecured Consumer Installment Loans Pool 3 [Member]
Accounts Notes And Loans Receivable [Line Items]
Original Balance	$ 10,300	$ 10,300
Current Balance	770	1,000
Unamortized Premium/ (Discount)	$ 32	$ 38
Number of Loans | Segment	329	354
Cumulative net charge-offs	$ 63	$ 63
Unsecured Consumer Installment Loans Pool 3 [Member] | Minimum [Member]
Accounts Notes And Loans Receivable [Line Items]
Maturity Range	0 years	0 years
Unsecured Consumer Installment Loans Pool 3 [Member] | Maximum [Member]
Accounts Notes And Loans Receivable [Line Items]
Maturity Range	9 years	9 years
Secured Consumer Installment Loans Pool 4 [Member]
Accounts Notes And Loans Receivable [Line Items]
Original Balance	$ 14,500	$ 14,500
Current Balance	11,200	11,300
Unamortized Premium/ (Discount)	$ (1,418)	$ (1,484)
Number of Loans | Segment	516	518
Secured Consumer Installment Loans Pool 4 [Member] | Minimum [Member]
Accounts Notes And Loans Receivable [Line Items]
Maturity Range	23 years	23 years
Secured Consumer Installment Loans Pool 4 [Member] | Maximum [Member]
Accounts Notes And Loans Receivable [Line Items]
Maturity Range	24 years	24 years
Unsecured Consumer Loan Pool 5 [Member]
Accounts Notes And Loans Receivable [Line Items]
Original Balance	$ 24,400	$ 24,400
Current Balance	17,100	17,300
Unamortized Premium/ (Discount)	$ (463)	$ (485)
Number of Loans | Segment	675	678
Unsecured Consumer Loan Pool 5 [Member] | Minimum [Member]
Accounts Notes And Loans Receivable [Line Items]
Maturity Range	8 years	8 years
Unsecured Consumer Loan Pool 5 [Member] | Maximum [Member]
Accounts Notes And Loans Receivable [Line Items]
Maturity Range	23 years	24 years
Revolving Commercial Line of Credit 1 [Member]
Accounts Notes And Loans Receivable [Line Items]
Original Balance	$ 11,600	$ 11,600
Current Balance	11,300	11,400
Unamortized Premium/ (Discount)	$ 11	$ 14
Number of Loans | Segment	1	1
Revolving Commercial Line of Credit 1 [Member] | Minimum [Member]
Accounts Notes And Loans Receivable [Line Items]
Maturity Range	0 years	0 years
Revolving Commercial Line of Credit 1 [Member] | Maximum [Member]
Accounts Notes And Loans Receivable [Line Items]
Maturity Range	1 year	1 year
Secured Consumer Installment Loans [Member]
Accounts Notes And Loans Receivable [Line Items]
Original Balance	$ 21,300	$ 21,300
Current Balance	19,200	19,700
Unamortized Premium/ (Discount)	$ (3,159)	$ (3,237)
Number of Loans | Segment	839	850
Cumulative net charge-offs	$ 50
Secured Consumer Installment Loans [Member] | Minimum [Member]
Accounts Notes And Loans Receivable [Line Items]
Maturity Range	18 years	18 years
Secured Consumer Installment Loans [Member] | Maximum [Member]
Accounts Notes And Loans Receivable [Line Items]
Maturity Range	25 years	25 years
Revolving Commercial Line of Credit 2 [Member]
Accounts Notes And Loans Receivable [Line Items]
Original Balance	$ 10,500	$ 10,500
Current Balance	15,000	15,000
Unamortized Premium/ (Discount)	$ 20	$ 23
Number of Loans | Segment	1	1
Revolving Commercial Line of Credit 2 [Member] | Minimum [Member]
Accounts Notes And Loans Receivable [Line Items]
Maturity Range	0 years	0 years
Revolving Commercial Line of Credit 2 [Member] | Maximum [Member]
Accounts Notes And Loans Receivable [Line Items]
Maturity Range	1 year	1 year
Unsecured Consumer Loan Pool 6 [Member]
Accounts Notes And Loans Receivable [Line Items]
Original Balance	$ 22,200	$ 22,200
Current Balance	19,700	20,200
Unamortized Premium/ (Discount)	$ (2,364)	$ (2,441)
Number of Loans | Segment	537	540
Unsecured Consumer Loan Pool 6 [Member] | Minimum [Member]
Accounts Notes And Loans Receivable [Line Items]
Maturity Range	8 years	8 years
Unsecured Consumer Loan Pool 6 [Member] | Maximum [Member]
Accounts Notes And Loans Receivable [Line Items]
Maturity Range	24 years	24 years

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