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Compensation Plans (Deferred Stock) (Details) - Deferred Stock [Member] - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Compensation expense	$ 0.7	$ 0.7	$ 0.7
Unrecognized compensation expense	$ 0.9
Unrecognized compensation cost, recognition period	3 years
Director [Member] | Vesting in May 2020 [Member]
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Deferred stock awards issued	6,336		6,360
Director [Member] | Vesting in May 2022 [Member]
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Deferred stock awards issued	7,719
Director [Member] | Vesting in May 2019 [Member]
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Deferred stock awards issued		5,767
Director [Member] | Vesting May 2021 [Member]
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Deferred stock awards issued		6,751
Director [Member] | Vesting May 2018 [Member]
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Deferred stock awards issued			5,432

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- Definition

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

+ References

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-Publisher FASB
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+ References

No definition available.

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