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Commitments and Off-balance Sheet Items (Summary of Commitments and Contingencies) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Commitment to Sell Loans, Mandatory
Commitments and Contingent Liabilities [Line Items]
Fixed Rate	$ 0	$ 0
Variable Rate	0	0
Commitment to Sell Loans, Non-Mandatory
Commitments and Contingent Liabilities [Line Items]
Fixed Rate	19,724	19,406
Variable Rate	0	0
Standby Letters of Credit
Commitments and Contingent Liabilities [Line Items]
Fixed Rate	2,122	1,138
Variable Rate	5,463	6,549
Commitment to Fund Loans
Commitments and Contingent Liabilities [Line Items]
Fixed Rate	101,605	88,601
Variable Rate	873,973	767,580
Commitment to Fund Loans | Consumer Lines
Commitments and Contingent Liabilities [Line Items]
Fixed Rate	15,319	11,637
Variable Rate	424,441	381,050
Commitment to Fund Loans | Commercial Operating Lines
Commitments and Contingent Liabilities [Line Items]
Fixed Rate	33,892	47,310
Variable Rate	447,270	384,513
Commitment to Fund Loans | Residential Mortgages
Commitments and Contingent Liabilities [Line Items]
Fixed Rate	52,394	29,654
Variable Rate	$ 2,262	$ 2,017

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- Definition

Reflects the amount of cash required to fully fund agreements to provide advances to borrowers and lessees at stated interest rates.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 825
-Section 50
-Paragraph 1
-Subparagraph (b)(2)
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- Definition

Reflects the amount of cash required to fully fund agreements to provide advances to borrowers and lessees at interest rates that increase or decrease depending on certain facts or circumstances.

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