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Incentive Plans (Tables) | 12 Months Ended
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Dec. 31, 2019
Restricted Stock [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Summary of restricted stock awards activity | The following is a summary of restricted stock award activity for 2019:
| Shares (in thousands) |  | Weighted Average Grant Date Fair Value
Non-vested - December 31, 2018 | 582 |  |  | $ | 49.48 |
Granted | 200 |  |  | 124.04 |
Vested | (320 | ) |  | 43.75 |
Canceled | (19 | ) |  | 77.83 |
Non-vested - December 31, 2019 | 443 |  |  | $ | 86.10 |
Performance Shares [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Summary of restricted stock awards activity | The following is a summary of LTIP award activity, at 100% of targeted amount, for 2019:
| Number of Performance Units (in thousands) |  | Weighted Average Grant Date Fair Value
Unvested at December 31, 2018 | 426 |  |  | $ | 46.35 |
Granted | 59 |  |  | 139.71 |
Vested | (207 | ) |  | 29.57 |
Canceled | (6 | ) |  | 61.47 |
Unvested at December 31, 2019 | 272 |  |  | $ | 79.95 |

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- Definition Tabular disclosure of the changes in outstanding nonvested shares. + 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) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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