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Equity Compensation Plans (Tables) | 6 Months Ended
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Jun. 30, 2022
Share-Based Payment Arrangement [Abstract] |
Equity Compensation Costs by Award Type | The unamortized compensation cost of awards issued under the Incentive Plan, which are settled by delivery of shares of common stock and purchases under the Employee Stock Purchase Plan, totaled $39 million at June 30, 2022, as shown in the following table. Table 18.1 – Activities of Equity Compensation Costs by Award Type
|  |  |  | Six Months Ended June 30, 2022
(In Thousands) |  |  |  | Restricted Stock Awards |  | Restricted Stock Units |  | Deferred Stock Units |  | Performance Stock Units |  | Employee Stock Purchase Plan |  | Total
Unrecognized compensation cost at beginning of period |  |  |  | $ | 84 |  |  | $ | 3,589 |  |  | $ | 26,473 |  |  | $ | 12,237 |  |  | $ | — |  |  | $ | 42,383 |
Equity grants |  |  |  | — |  |  | 2,684 |  |  | 4,350 |  |  | — |  |  | 323 |  |  | 7,357 |
Performance-based valuation adjustment |  |  |  | — |  |  | — |  |  | — |  |  | (1,719) |  |  | — |  |  | (1,719) |
Equity grant forfeitures |  |  |  | (5) |  |  | (339) |  |  | — |  |  | — |  |  | — |  |  | (344) |
Equity compensation expense |  |  |  | (72) |  |  | (1,049) |  |  | (5,782) |  |  | (1,988) |  |  | (162) |  |  | (9,053) |
Unrecognized Compensation Cost at End of Period |  |  |  | $ | 7 |  |  | $ | 4,885 |  |  | $ | 25,041 |  |  | $ | 8,530 |  |  | $ | 161 |  |  | $ | 38,624 |

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- Definition Tabular disclosure of cost not yet recognized and weighted-average period over which cost is expected to be recognized for nonvested award under share-based payment arrangement. + 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 (i) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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