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Loans and Allowance for Credit Losses on Loans (Credit Risk Exposure Indicators by Portfolio Segment) (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Financing Receivable, Recorded Investment [Line Items]
Loans	$ 3,431,474	$ 3,219,822	$ 3,095,023
Residential real estate
Financing Receivable, Recorded Investment [Line Items]
Loans	1,306,447	1,054,798	1,070,374
Commercial real estate
Financing Receivable, Recorded Investment [Line Items]
Loans			1,243,397
Commercial
Financing Receivable, Recorded Investment [Line Items]
Loans	363,695	381,494	442,701
Home equity
Financing Receivable, Recorded Investment [Line Items]
Loans	210,403	258,573	312,779
Consumer
Financing Receivable, Recorded Investment [Line Items]
Loans	$ 19,516	$ 20,392	$ 25,772

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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

No definition available.

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- Definition

Amount before allowance and after deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=124259787&loc=d3e4428-111522

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=123577603&loc=d3e5074-111524

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