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Share-Based Compensation - Restricted Stock Units (Details) $ / shares in Units, $ in Millions | 9 Months Ended
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Sep. 30, 2023 USD ($) $ / shares shares
Restricted Stock Units |
RSU Activity |
Outstanding at the beginning of the period (in shares) | 940,512
Granted (in shares) | 386,987
Vested (in shares) | (370,493)
Forfeited (in shares) | (10,052)
Outstanding at the end of the period (in shares) | 946,954
Weighted-Average Grant-Date Fair Value |
Outstanding at the beginning of the period (in dollars per share) | $ / shares | $ 73.82
Granted (in dollars per share) | $ / shares | 74.59
Vested (in dollars per share) | $ / shares | 71.78
Forfeited (in dollars per share) | $ / shares | 76.02
Outstanding at the end of the period (in dollars per share) | $ / shares | $ 74.91
Additional disclosures |
Options vested (in shares) | 147,955
Total unrecognized compensation cost related to nonvested restricted stock and RSUs granted | $ | $ 30.7
Weighted-average period over which unrecognized compensation cost is expected to be recognized | 1 year 21 days
Total fair value of shares vested during the period | $ | $ 26.6
Restricted Stock Units | Maximum |
Additional disclosures |
Vesting period | 12 months
Performance based restricted stock units |
Additional disclosures |
Performance period | 3 years
Other Performance based restricted stock units | Minimum |
Additional disclosures |
Performance period | 1 year
Other Performance based restricted stock units | Maximum |
Additional disclosures |
Performance period | 2 years
Timed based restricted stock units | Minimum |
Additional disclosures |
Performance period | 2 years
Timed based restricted stock units | Maximum |
Additional disclosures |
Performance period | 4 years
2021 and 2022 LTI performance-based RSU grants | Restricted Stock Units |
Additional disclosures |
Additional shares authorized | 148,756
Vesting period | 3 years

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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://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(03) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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- Definition Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(03) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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- Definition The weighted average fair value at grant date for nonvested equity-based awards issued 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://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(01) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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- Definition Per share or unit weighted-average fair value of nonvested award under share-based payment arrangement. Excludes share and unit options. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2)(i) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2)(ii) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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