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Stock Based Compensation (Schedule of Outstanding Stock Options) (Details) - $ / shares	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options Outstanding	226,075	215,970	199,825
Average Exercise Price	$ 26.37	$ 25.73	$ 24.78
Remaining Life, Years	6 years 4 months 24 days
Options Exercisable	182,575	182,220
Average Exercise Price	$ 26.50	$ 25.51
Average Exercise Price 1 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options Outstanding	21,450
Average Exercise Price	$ 18.03
Remaining Life, Years	1 year
Options Exercisable	21,450
Average Exercise Price	$ 18.03
Average Exercise Price 2 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options Outstanding	1,650
Average Exercise Price	$ 18.36
Remaining Life, Years	1 year
Options Exercisable	1,650
Average Exercise Price	$ 18.36
Average Exercise Price 3 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options Outstanding	19,375
Average Exercise Price	$ 17.93
Remaining Life, Years	2 years
Options Exercisable	19,375
Average Exercise Price	$ 17.93
Average Exercise Price 4 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options Outstanding	8,250
Average Exercise Price	$ 19.39
Remaining Life, Years	2 years 10 months 24 days
Options Exercisable	8,250
Average Exercise Price	$ 19.39
Average Exercise Price 5 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options Outstanding	9,375
Average Exercise Price	$ 19.03
Remaining Life, Years	3 years 10 months 24 days
Options Exercisable	9,375
Average Exercise Price	$ 19.03
Average Exercise Price 6 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options Outstanding	14,375
Average Exercise Price	$ 22.37
Remaining Life, Years	5 years
Options Exercisable	14,375
Average Exercise Price	$ 22.37
Average Exercise Price 7 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options Outstanding	26,750
Average Exercise Price	$ 32.81
Remaining Life, Years	6 years
Options Exercisable	26,750
Average Exercise Price	$ 32.81
Average Exercise Price 8 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options Outstanding	23,600
Average Exercise Price	$ 32.34
Remaining Life, Years	7 years
Options Exercisable	23,600
Average Exercise Price	$ 32.34
Average Exercise Price 9 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options Outstanding	24,000
Average Exercise Price	$ 36.02
Remaining Life, Years	8 years
Options Exercisable	24,000
Average Exercise Price	$ 36.02
Average Exercise Price 10 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options Outstanding	33,750
Average Exercise Price	$ 26.93
Remaining Life, Years	9 years
Options Exercisable	33,750
Average Exercise Price	$ 26.93
Average Exercise Price 11 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options Outstanding	1,000
Average Exercise Price	$ 26.35
Remaining Life, Years	9 years 3 months 18 days
Average Exercise Price 12 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options Outstanding	1,000
Average Exercise Price	$ 25.38
Remaining Life, Years	9 years 6 months
Average Exercise Price - 13 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options Outstanding	41,500
Average Exercise Price	$ 25.80
Remaining Life, Years	9 years 10 months 24 days

X

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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.

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The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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