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Loans and Allowance for Credit Losses on Loans (Troubled Debt Restructuring by Portfolio Segment) (Details)	12 Months Ended
	Dec. 31, 2021 USD ($) loan	Dec. 31, 2020 USD ($) loan	Dec. 31, 2019 USD ($) loan
Financing Receivable, Modifications [Line Items]
Number of Contracts	3	0	2
Pre-Modification Outstanding Recorded Investment	$ 346,000	$ 0	$ 64,000
Post-Modification Outstanding Recorded Investment	357,000	0	69,000
Specific Reserve	$ 6,000	$ 0	$ 15,000
Home equity | Interest Rate Concession and Payment Deferral
Financing Receivable, Modifications [Line Items]
Number of Contracts | loan	1	0
Pre-Modification Outstanding Recorded Investment	$ 159,000	$ 0
Post-Modification Outstanding Recorded Investment	170,000	0
Specific Reserve	$ 0	$ 0
Home equity | Extended Maturity
Financing Receivable, Modifications [Line Items]
Number of Contracts | loan	2	0	0
Pre-Modification Outstanding Recorded Investment	$ 187,000	$ 0	$ 0
Post-Modification Outstanding Recorded Investment	187,000	0	0
Specific Reserve	$ 6,000	$ 0	$ 0
Home Equity Loan | Interest Rate and Maturity Concession
Financing Receivable, Modifications [Line Items]
Number of Contracts | loan	0	0	2
Pre-Modification Outstanding Recorded Investment	$ 0	$ 0	$ 64,000
Post-Modification Outstanding Recorded Investment	0	0	69,000
Specific Reserve	$ 0	$ 0	$ 15,000

X

- Definition

Allowance Related to Troubled Debt Restructurings assigned during period

+ References

No definition available.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

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- Definition

Number of financing receivables that have been modified by troubled debt restructurings.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 33
-URI http://asc.fasb.org/extlink&oid=123577603&loc=SL6953676-111524

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- Definition

Amount, after troubled debt restructuring, of modified financing receivable.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 33
-URI http://asc.fasb.org/extlink&oid=123577603&loc=SL6953676-111524

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- Definition

Amount, before troubled debt restructuring, of financing receivable to be modified.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 33
-URI http://asc.fasb.org/extlink&oid=123577603&loc=SL6953676-111524

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