The compensation expense recognized during the period pertaining to the deferred compensation arrangement.

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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.

+ References

No definition available.

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Number of shares issued pursuant to the terms of a deferred compensation 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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Amount of cost to be recognized for option under share-based payment arrangement.

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Compensation Plans (Deferred Stock) (Details) - Deferred Stock [Member] - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Compensation expense	$ 0.8	$ 0.8	$ 0.7
Unrecognized compensation expense	$ 0.8
Unrecognized compensation cost, recognition period	3 years
Director [Member] \| Vesting May 2022 [Member]
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Deferred stock awards issued	5,113		7,720
Director [Member] \| Vesting in May 2024 [Member]
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Deferred stock awards issued	6,615
Director [Member] \| Vesting in May 2021 [Member]
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Deferred stock awards issued		6,244
Director [Member] \| Vesting in May 2023 [Member]
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Deferred stock awards issued		8,078
Director [Member] \| Vesting in May 2020 [Member]
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Deferred stock awards issued			6,337