Share-Based Compensation and Benefit Plans (Stock Option) (Narrative) (Details) - Stock option [Member] $ in Millions	12 Months Ended
Dec. 31, 2020 USD ($)
Share-Based Compensation and Benefit Plans
Remaining unrecognized compensation expense	$ 32.6
Weighted-average period for cost recognition	2 years 4 months 24 days
Employee stock option [Member]
Share-Based Compensation and Benefit Plans
Options expiration period	10 years
Vesting period	4 years
Option vesting rate per year	25.00%

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

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (i)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

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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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Estimated period over which an employee is required to provide service in exchange for the equity-based payment award, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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-Publisher FASB
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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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No definition available.

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Percentage of vesting of award under share-based payment arrangement.

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-Publisher FASB
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-SubTopic 10
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Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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