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Stock-Based Compensation (Tables) | 12 Months Ended
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Dec. 31, 2021
Share-based Payment Arrangement [Abstract] |
Summary of restricted stock units, stock grants and stock units | The following table is a summary of awards granted and the weighted-average grant date fair value for each of the last three years:
| Restricted Stock Units, Stock Grants, and Stock Units (a) |  | Performance Shares (b)
| 2021 |  | 2020 |  | 2019 |  | 2021 |  | 2020 |  | 2019
Units granted | 152,345 |  |  | 118,403 |  |  | 109,106 |  |  | 161,840 |  |  | 122,830 |  |  | 142,874 |
Weighted-average grant date fair value | $ | 76.72 |  |  | $ | 71.70 |  |  | $ | 89.15 |  |  | $ | 82.42 |  |  | $ | 104.74 |  |  | $ | 92.16 |
(a)Units granted includes awards that will be cash settled of 51,074 in 2021, 45,646 in 2020, and 48,972 in 2019. (b)Reflects the target payout level. The following table is a summary of the status of non-vested awards as of December 31, 2021, and changes during the year:
| Restricted Stock Units, Stock Grants, and Stock Units |  | Performance Shares
| Shares |  | Weighted-Average Grant Date Fair Value |  | Shares (b) |  | Weighted-Average Grant Date Fair Value
Nonvested at January 1, 2021 | 220,557 |  |  | $ | 77.93 |  |  | 260,004 |  |  | $ | 98.28 |
Granted | 152,345 |  |  | 76.72 |  |  | 161,840 |  |  | 82.42 |
Vested | (115,099) |  |  | 80.50 |  |  | (136,070) |  |  | 92.16 |
Forfeited (c) | (4,647) |  |  | 80.11 |  |  | (5,092) |  |  | 95.07 |
Nonvested at December 31, 2021 | 253,156 |  | (a) | 79.37 |  |  | 280,682 |  |  | 92.16 |
Vested Awards Outstanding at December 31, 2021 | 88,706 |  |  |  |  | 136,070 |  |  |
(a)Includes 118,538 of awards that will be cash settled. (b)The nonvested performance shares are reflected at target payout level. (c)We account for forfeitures as they occur.
Summary of nonvested performance shares | The following table is a summary of awards granted and the weighted-average grant date fair value for each of the last three years:
| Restricted Stock Units, Stock Grants, and Stock Units (a) |  | Performance Shares (b)
| 2021 |  | 2020 |  | 2019 |  | 2021 |  | 2020 |  | 2019
Units granted | 152,345 |  |  | 118,403 |  |  | 109,106 |  |  | 161,840 |  |  | 122,830 |  |  | 142,874 |
Weighted-average grant date fair value | $ | 76.72 |  |  | $ | 71.70 |  |  | $ | 89.15 |  |  | $ | 82.42 |  |  | $ | 104.74 |  |  | $ | 92.16 |
(a)Units granted includes awards that will be cash settled of 51,074 in 2021, 45,646 in 2020, and 48,972 in 2019. (b)Reflects the target payout level. The following table is a summary of the status of non-vested awards as of December 31, 2021, and changes during the year:
| Restricted Stock Units, Stock Grants, and Stock Units |  | Performance Shares
| Shares |  | Weighted-Average Grant Date Fair Value |  | Shares (b) |  | Weighted-Average Grant Date Fair Value
Nonvested at January 1, 2021 | 220,557 |  |  | $ | 77.93 |  |  | 260,004 |  |  | $ | 98.28 |
Granted | 152,345 |  |  | 76.72 |  |  | 161,840 |  |  | 82.42 |
Vested | (115,099) |  |  | 80.50 |  |  | (136,070) |  |  | 92.16 |
Forfeited (c) | (4,647) |  |  | 80.11 |  |  | (5,092) |  |  | 95.07 |
Nonvested at December 31, 2021 | 253,156 |  | (a) | 79.37 |  |  | 280,682 |  |  | 92.16 |
Vested Awards Outstanding at December 31, 2021 | 88,706 |  |  |  |  | 136,070 |  |  |
(a)Includes 118,538 of awards that will be cash settled. (b)The nonvested performance shares are reflected at target payout level. (c)We account for forfeitures as they occur.

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- Definition Disclosure of the number and weighted-average grant date fair value for restricted stock and restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock and restricted stock units that were granted, vested, or forfeited during the year. + References No definition available. + Details
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- Definition Tabular disclosure of number and weighted-average grant date fair value for nonvested performance 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) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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