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Treasury Stock and Share Based Awards (Tables) | 9 Months Ended
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Sep. 30, 2022
Summary of Treasury Stock Activity | Below is a summary of treasury stock activity for the nine months ended September 30, 2022:
|  | Number of |  |  |  |
|  | Treasury |  |  |  |
|  | Shares |  |  | Cost |
Balance at January 1, 2022 |  |  | 5.35 |  |  | $ | 91.1 |
Restricted stock withholdings (1) |  |  | 0.24 |  |  |  | 4.1 |
Restricted stock forfeitures |  |  | 0.07 |  |  |  | — |
Balance at September 30, 2022 |  |  | 5.66 |  |  | $ | 95.2 |
(1) Holdings withheld shares as a result of the election by certain employees to satisfy their tax liabilities upon vesting of restricted stock and restricted stock units. Holdings determined the number of shares to be withheld based upon market values of the common stock of Holdings on the vest dates, which ranged from $15.18 to $18.33 per share.
Summary of Restricted Stock Activity | Below is a summary of restricted stock activity for the nine months ended September 30, 2022:
|  | Shares of |  |  | Weighted Average |
|  | Restricted |  |  | Grant Date |
|  | Stock |  |  | Fair Value |
Outstanding at January 1, 2022 |  |  | 2.00 |  |  | $ | 21.73 |
Granted |  |  | 0.88 |  |  | $ | 16.40 |
Vested |  |  | (0.90 | ) |  | $ | 19.00 |
Forfeited |  |  | (0.07 | ) |  | $ | 18.80 |
Outstanding at September 30, 2022 |  |  | 1.91 |  |  | $ | 20.66 |
Unvested restricted stock at September 30, 2022 |  |  | 1.91 |  |  | $ | 20.66 |
CUSA |
Summary of Restricted Stock and Restricted Stock Unit Award Activity |
|  | Nine Months Ended September 30, |
|  | 2022 |  |  | 2021 |
Compensation expense recognized during the period |  |  |  |  |  |
CUSA employees |  | $ | 11.3 |  |  | $ | 13.1 |
Holdings directors |  |  | 0.7 |  |  |  | 0.7 |
Total recognized by Holdings |  | $ | 12.0 |  |  | $ | 13.8 |
Fair value of vested restricted stock held by: |  |  |  |  |  |
CUSA employees |  | $ | 14.6 |  |  | $ | 1.2 |
Holdings directors |  |  | 0.6 |  |  |  | 1.3 |
Holdings total |  | $ | 15.2 |  |  | $ | 2.5 |
Income tax benefit (cost) related to vested restricted stock held by: |  |  |  |  |  |
CUSA employees |  | $ | 2.4 |  |  | $ | (0.4 | )
Holdings directors |  |  | 0.1 |  |  |  | 0.3 |
Holdings total income tax benefit (cost) |  | $ | 2.5 |  |  | $ | (0.1 | )
Restricted Stock |
Summary of Restricted Stock and Restricted Stock Unit Award Activity | As of September 30, 2022, the estimated remaining unrecognized compensation expense related to unvested restricted stock awards was as follows:
|  | Estimated |
|  | Remaining |
|  | Expense |
CUSA employees (1) |  | $ | 23.0 |
Holdings directors |  |  | 0.8 |
Total remaining - Holdings (1) |  | $ | 23.8 |
Restricted Stock Units (RSUs) |
Summary of Restricted Stock and Restricted Stock Unit Award Activity | Below is a summary of restricted stock unit activity for the periods presented:
|  | Nine Months Ended September 30, |
|  | 2022 |  |  | 2021 |
Number of restricted stock units that vested during the period |  |  | 0.10 |  |  |  | 0.01 |
Fair value of restricted stock units that vested during the period |  | $ | 1.7 |  |  | $ | 0.3 |
Accumulated dividends paid upon vesting of restricted stock units |  | $ | 0.3 |  |  | $ | 0.1 |
Compensation expense recognized during the period |  | $ | 4.2 |  |  | $ | 2.8 |
Income tax benefit (cost) related to restricted stock units |  | $ | 0.1 |  |  | $ | (0.5 | )

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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 https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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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 treasury stock, including, but not limited to, average cost per share, description of share repurchase program, shares repurchased, shares held for each class of treasury stock. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 50 -Paragraph 3 -URI https://asc.fasb.org/extlink&oid=6405834&loc=d3e23309-112656 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 45 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=6405813&loc=d3e23239-112655 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 50 -Paragraph 4 -URI https://asc.fasb.org/extlink&oid=6405834&loc=d3e23315-112656 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 50 -Paragraph 2 -URI https://asc.fasb.org/extlink&oid=6405834&loc=d3e23285-112656 + Details
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