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Share-Based Compensation (Narrative Disclosures) (Details) $ in Millions	9 Months Ended
	Sep. 30, 2021 USD ($) shares
Share-based Payment Arrangement [Abstract]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant	218,880
Deferred compensation expense yet to be recognized | $	$ 3.6
Period of time that deferred compensation expense will be recognized	2 years 2 months 12 days
Employee Stock Purchase Plan, Number of Shares Authorized for Grant	250,000
Stock Issued During Period, Shares, Employee Stock Purchase Plans	4,959
Employee Stock Purchase Plan, Number of Shares Available for Grant	241,074

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Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

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Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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Number of shares issued during the period as a result of an employee stock purchase plan.

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