Loans - Summary of Purchased Loans Pools (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2021 USD ($) Loan	Dec. 31, 2020 USD ($) Loan
Residential Mortgage [Member]
Accounts Notes And Loans Receivable [Line Items]
Original Balance	$ 4,300	$ 4,300
Current Balance	4,100	4,300
Unamortized Premium	$ 257	$ 273
Percent Owned	100.00%	100.00%
Number of Loans | Loan	51	51
Purchased Residential Real Estate Loans Two [Member]
Accounts Notes And Loans Receivable [Line Items]
Original Balance	$ 21,300
Current Balance	21,400
Unamortized Premium	$ 3,642
Percent Owned	62.00%
Number of Loans | Loan	900
Commercial Loan [Member]
Accounts Notes And Loans Receivable [Line Items]
Original Balance	$ 6,800	$ 6,800
Current Balance	$ 3,900	$ 5,500
Percent Owned	100.00%	100.00%
Number of Loans | Loan	33	39
Purchased Commercial Line of Credit 1 [Member]
Accounts Notes And Loans Receivable [Line Items]
Original Balance	$ 11,600
Current Balance	7,100
Unamortized Premium	$ 26
Percent Owned	5.00%
Number of Loans | Loan	1
Purchased Commercial Line of Credit 2 [Member]
Accounts Notes And Loans Receivable [Line Items]
Original Balance	$ 10,500
Current Balance	9,300
Unamortized Premium	$ 35
Percent Owned	28.00%
Number of Loans | Loan	1
Home Equity Line of Credit [Member]
Accounts Notes And Loans Receivable [Line Items]
Original Balance	$ 21,900	$ 21,900
Current Balance	8,400	13,900
Unamortized Premium	$ 243	$ 309
Percent Owned	100.00%	100.00%
Number of Loans | Loan	187	275
Automobile Loans [Member]
Accounts Notes And Loans Receivable [Line Items]
Original Balance	$ 50,400	$ 50,400
Current Balance	8,800	17,000
Unamortized Premium	$ 301	$ 602
Percent Owned	90.00%	90.00%
Number of Loans | Loan	855	1,257
Cumulative net charge-offs	$ 239	$ 230
Consumer Loan Pool 1 [Member]
Accounts Notes And Loans Receivable [Line Items]
Original Balance	5,400	5,400
Current Balance	$ 2,600	$ 3,600
Percent Owned	100.00%	100.00%
Number of Loans | Loan	66	76
Consumer Loan Pool 2 [Member]
Accounts Notes And Loans Receivable [Line Items]
Original Balance	$ 26,600	$ 26,600
Current Balance	6,300	15,400
Unamortized Premium	$ 30	$ 63
Percent Owned	59.00%	59.00%
Number of Loans | Loan	1,438	2,246
Cumulative net charge-offs	$ 42
Consumer Loan Pool 3 [Member]
Accounts Notes And Loans Receivable [Line Items]
Original Balance	10,300	$ 10,300
Current Balance	2,200	5,500
Unamortized Premium	$ 74	$ 138
Percent Owned	100.00%	100.00%
Number of Loans | Loan	1,356	2,958
Cumulative net charge-offs	$ 296
Consumer Loan Pool 4 [Member]
Accounts Notes And Loans Receivable [Line Items]
Original Balance	14,500	$ 14,500
Current Balance	12,600	14,500
Unamortized Premium	$ 1,776	$ 2,124
Percent Owned	68.00%	68.00%
Number of Loans | Loan	563	619
Maturity Range	15 years	25 years
Consumer Loan Pool 5 [Member]
Accounts Notes And Loans Receivable [Line Items]
Original Balance	$ 24,400
Current Balance	19,700
Unamortized Premium	$ 583
Percent Owned	100.00%
Number of Loans | Loan	756
Consumer Loan Pool 6 [Member]
Accounts Notes And Loans Receivable [Line Items]
Original Balance	$ 22,200
Current Balance	22,100
Unamortized Premium	$ 2,785
Percent Owned	100.00%
Number of Loans | Loan	564
Minimum [Member] | Residential Mortgage [Member]
Accounts Notes And Loans Receivable [Line Items]
Maturity Range	17 years	17 years
Minimum [Member] | Purchased Residential Real Estate Loans Two [Member]
Accounts Notes And Loans Receivable [Line Items]
Maturity Range	19 years
Minimum [Member] | Commercial Loan [Member]
Accounts Notes And Loans Receivable [Line Items]
Maturity Range	4 years	5 years
Minimum [Member] | Purchased Commercial Line of Credit 1 [Member]
Accounts Notes And Loans Receivable [Line Items]
Maturity Range	0 years
Minimum [Member] | Purchased Commercial Line of Credit 2 [Member]
Accounts Notes And Loans Receivable [Line Items]
Maturity Range	0 years
Minimum [Member] | Home Equity Line of Credit [Member]
Accounts Notes And Loans Receivable [Line Items]
Maturity Range	2 years	3 years
Minimum [Member] | Automobile Loans [Member]
Accounts Notes And Loans Receivable [Line Items]
Maturity Range	0 years	0 years
Minimum [Member] | Consumer Loan Pool 1 [Member]
Accounts Notes And Loans Receivable [Line Items]
Maturity Range	3 years	3 years
Minimum [Member] | Consumer Loan Pool 2 [Member]
Accounts Notes And Loans Receivable [Line Items]
Maturity Range	1 year	2 years
Minimum [Member] | Consumer Loan Pool 3 [Member]
Accounts Notes And Loans Receivable [Line Items]
Maturity Range	0 years	0 years
Maximum [Member] | Residential Mortgage [Member]
Accounts Notes And Loans Receivable [Line Items]
Maturity Range	23 years	25 years
Maximum [Member] | Purchased Residential Real Estate Loans Two [Member]
Accounts Notes And Loans Receivable [Line Items]
Maturity Range	25 years
Maximum [Member] | Commercial Loan [Member]
Accounts Notes And Loans Receivable [Line Items]
Maturity Range	8 years	9 years
Maximum [Member] | Purchased Commercial Line of Credit 1 [Member]
Accounts Notes And Loans Receivable [Line Items]
Maturity Range	1 year
Maximum [Member] | Purchased Commercial Line of Credit 2 [Member]
Accounts Notes And Loans Receivable [Line Items]
Maturity Range	1 year
Maximum [Member] | Home Equity Line of Credit [Member]
Accounts Notes And Loans Receivable [Line Items]
Maturity Range	28 years	29 years
Maximum [Member] | Automobile Loans [Member]
Accounts Notes And Loans Receivable [Line Items]
Maturity Range	5 years	6 years
Maximum [Member] | Consumer Loan Pool 1 [Member]
Accounts Notes And Loans Receivable [Line Items]
Maturity Range	5 years	6 years
Maximum [Member] | Consumer Loan Pool 2 [Member]
Accounts Notes And Loans Receivable [Line Items]
Maturity Range	3 years	4 years
Maximum [Member] | Consumer Loan Pool 3 [Member]
Accounts Notes And Loans Receivable [Line Items]
Maturity Range	6 years	6 years
Maximum [Member] | Consumer Loan Pool 5 [Member]
Accounts Notes And Loans Receivable [Line Items]
Maturity Range	15 years
Maximum [Member] | Consumer Loan Pool 6 [Member]
Accounts Notes And Loans Receivable [Line Items]
Maturity Range	15 years