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Share-Based Compensation Plans (Tables) | 12 Months Ended
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Dec. 31, 2023
Share-Based Payment Arrangement [Abstract] |
Schedule of Nonvested Share Activity [Table Text Block] | The following represents a summary of the non-vested shares for the three years ended December 31, 2023 (in thousands):
|  | Restricted Stock |  | Restricted Stock Units
|  | Shares |  | Weighted Average Grant Date Fair Value |  | Units |  | Weighted Average Grant Date Fair Value
Non-vested at January 1, 2021 |  | 420,234 |  |  |  |  | 69,669 |  |  |
Granted |  | 247,917 |  |  | $ | 73.01 |  |  | 17,570 |  |  | $ | 88.25 |
Vested |  | (166,965) |  |  | 94.96 |  |  | — |  |  | — |
Forfeited |  | (11,632) |  |  | 75.83 |  |  | — |  |  | — |
Non-vested at December 31, 2021 |  | 489,554 |  |  |  |  | 87,239 |  |  |
Granted |  | 183,809 |  |  | $ | 108.23 |  |  | 25,416 |  |  | $ | 103.79 |
Vested |  | (139,859) |  |  | 76.80 |  |  | (61,645) |  |  | 91.38 |
Forfeited |  | (40,620) |  |  | 79.60 |  |  | — |  |  | — |
Non-vested at December 31, 2022 |  | 492,884 |  |  |  |  | 51,010 |  |  |
Granted |  | 180,178 |  |  | $ | 97.56 |  |  | 7,275 |  |  | $ | 102.35 |
Vested |  | (103,515) |  |  | 82.85 |  |  | (6,894) |  |  | 77.36 |
Forfeited |  | (30,557) |  |  | 95.17 |  |  | — |  |  | — |
Non-vested at December 31, 2023 |  | 538,990 |  |  |  |  | 51,391 |  |  |

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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 -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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