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Stock-Based Compensation Plans (Narrative) (Details) | 1 Months Ended | 12 Months Ended |
--- | --- | --- | ---
May 31, 2020 shares | Feb. 29, 2020 | Feb. 28, 2019 | Feb. 28, 2018 | Dec. 31, 2021 item shares | Dec. 31, 2020 shares | Dec. 31, 2019 shares | Mar. 31, 2022 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Number of stock incentive plans | item |  |  |  |  | 3 |  |  |
Number of shares authorized |  |  |  |  | 5,100,000 |  |  |
Options granted |  |  |  |  | 326,806 | 298,670 | 287,010 |
Performance Stock Units [Member] |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Shares vesting period, years |  | 3 years | 3 years | 3 years |  |  |  |
Performance Stock Units [Member] | Maximum [Member] |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Percentage participant can ultimately receive of the targeted PSUs |  |  |  |  | 200.00% |  |  |
Performance Stock Units [Member] | Forecast [Member] |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Vested share units that will be converted |  |  |  |  |  |  |  | 23,196
Stock Options [Member] |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Shares vesting period, years |  |  |  |  | 3 years |  |  |
Shares contractual life |  |  |  |  | 5 years |  |  |
Options granted |  |  |  |  | 326,806 |  |  |
Stock Options [Member] | Prior to Year 2014 [Member] |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Shares contractual life |  |  |  |  | 10 years |  |  |
Outside Directors [Member] |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Options granted | 2,430 |  |  |  |  |  |  |

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- Definition Number of Nonvested Target Units, Vested or expected to vest at December 31, 2015 + References No definition available. + Details
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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. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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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. + References No definition available. + Details
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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. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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