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Share-Based and Other Compensation - Share-Based Compensation Grants (Details) - shares |  |  |  |  | 1 Months Ended | 2 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | --- | --- | ---
Jan. 31, 2020 | Feb. 01, 2019 | Dec. 27, 2018 | Feb. 14, 2018 | Jan. 31, 2020 | Feb. 28, 2019 | Dec. 31, 2018 | Feb. 28, 2018 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Restricted Stock Units (RSUs) [Member] |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |
Grants in period (in shares) |  |  |  |  | 263,626 |  |  |  |  |  |
Restricted Stock Units (RSUs) [Member] | Executive officer share-based compensation programs [Member] |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |
Grants in period (in shares) |  |  | 161,290 |  |  | 288,378 |  | 282,038 |  |  |
Restricted Stock Units (RSUs) [Member] | Chief Executive Officer [Member] | Executive officer share-based compensation programs [Member] |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |
Grants in period (in shares) |  |  | 483,871 |  |  |  |  |  |  |  |
Market measure-based Restricted Stock Units (RSUs) [Member] |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |
Grants in period (in shares) |  |  |  |  | 154,267 |  |  |  |  |  |
Market measure-based Restricted Stock Units (RSUs) [Member] | Executive officer share-based compensation programs [Member] |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |
Grants in period (in shares) | 154,267 | 143,396 | 80,647 | 158,205 |  |  |  |  |  |  |
Market measure-based Restricted Stock Units (RSUs) [Member] | Chief Executive Officer [Member] | Executive officer share-based compensation programs [Member] |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |
Grants in period (in shares) |  |  | 266,130 |  |  |  |  |  |  |  |
Time-Based Restricted Stock Units (RSUs) [Member] |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |
Grants in period (in shares) |  |  |  |  | 109,359 |  |  |  |  |  |
Time-Based Restricted Stock Units (RSUs) [Member] | Executive officer share-based compensation programs [Member] |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |
Grants in period (in shares) |  |  | 80,643 |  |  | 144,982 |  | 123,833 |  |  | 14,999
Forfeited in period (in shares) |  |  |  |  |  |  |  |  | 5,148 | 10,733 |
Time-Based Restricted Stock Units (RSUs) [Member] | Chief Executive Officer [Member] | Executive officer share-based compensation programs [Member] |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |
Grants in period (in shares) |  |  | 217,741 |  |  |  |  |  |  |  |
Performance-Based RSUs [Member] | Executive officer share-based compensation programs [Member] |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |
Forfeited in period (in shares) |  |  |  |  |  |  |  |  | 12,263 | 24,353 |
December 2018 Market-Based RSUs [Member] |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |
Grants in period (in shares) |  |  |  |  |  |  | 346,777 |  |  |  |
December 2018 Market-Based RSUs [Member] | Executive officer share-based compensation programs [Member] |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |
Grants in period (in shares) |  |  |  |  |  | 143,396 |  | 158,205 |  |  |
Time-Based Restricted Stock Units (RSUs), 2018 Special Time-Based RSU Grant [Member] |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |
Grants in period (in shares) |  |  | 298,384 |  |  |  |  |  |  |  |
Time-Based Restricted Stock Units (RSUs), 2018 Special Time-Based RSU Grant [Member] | Executive officer share-based compensation programs [Member] |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |
Forfeited in period (in shares) |  |  |  |  |  |  |  |  | 6,441 | 98,844 |

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- Definition The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period. + 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 (c)(1)(iv)(3) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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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). + 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 (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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