Deferred Compensation Arrangement with Individual Deferred Compensation Percentage

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- Definition

Deferred Stock Units Outstanding

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- Definition

Share Based Compensation Stock Options Expiration Period.

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No definition available.

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- Definition

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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No definition available.

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- Definition

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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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
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- Definition

Amount of cost to be recognized for nonvested award under share-based payment arrangement. Excludes share and unit options.

+ References

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- Definition

Amount of cost to be recognized for option under share-based payment arrangement.

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- Definition

Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

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- Definition

The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

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- Definition

The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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- Definition

Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash.

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- Definition

Number of shares authorized for issuance under share-based payment arrangement.

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- Definition

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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- Definition

Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

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- Definition

The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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- Definition

Value of stock related to Restricted Stock Awards issued during the period, net of the stock value of such awards forfeited.

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Stock Based Compensation (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Stock options exercised intrinsic value	$ 0.5	$ 0.0	$ 0.3
Unrecognized compensation cost related to unvested option	$ 1.3
Weighted average period of recognition	2 years 9 months 18 days
Weighted average fair value of option granted	$ 6.20	$ 4.32	$ 10.69
Two Thousand And Eleven Plan [Member]
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Common stock shares authorized for issuance	7,800,000
Common stock available for future grant	2,500,000
Two Thousand And Eleven Plan [Member] \| Maximum [Member]
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Share based compensation stock options expiration period	10 years
Non Employee Director [Member]
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Deferred stock units outstanding	183,851	158,283
Non Employee Director [Member] \| Maximum [Member]
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Deferred percentage of director fees invested in deferred stock units	100.00%
Restricted Shares
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Weighted average period of recognition	2 years 3 months 18 days
Fair value of restricted stock awards released	$ 2.0	$ 1.5	$ 2.9
Unrecognized compensation cost related to unvested restricted stock awards	$ 4.7
Awards granted	474,877	661,784	224,835
Forfeited	283,121	107,309	80,305
Performance-Base Restricted Stock Awards
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Awards granted	94,591	100,281
Grant date fair value of awards	$ 0.9	$ 1.1
Forfeited	105,165	4,000
2020 Performance Based Awards [Member] \| Senior Management
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Vesting period of grants	3 years
2019 performance-based Awards [Member] \| Senior Management
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Vesting period of grants	3 years