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SHAREHOLDERS' EQUITY (Tables) | 9 Months Ended
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Sep. 30, 2021
Equity [Abstract] |
COMMON SHARES ISSUED AND OUTSTANDING | The following table presents changes in common shares issued and outstanding:
|  | Three months ended September 30, |  | Nine months ended September 30, |
|  | 2021 |  | 2020 |  | 2021 |  | 2020 |
| Shares issued, balance at beginning of period | 176,580 |  |  | 176,580 |  |  | 176,580 |  |  | 176,580 |  |
| Shares issued | — |  |  | — |  |  | — |  |  | — |  |
| Total shares issued at end of period | 176,580 |  |  | 176,580 |  |  | 176,580 |  |  | 176,580 |  |
| Treasury shares, balance at beginning of period | (91,813) |  |  | (92,274) |  |  | (92,227) |  |  | (92,621) |  |
| Shares repurchased | (4) |  |  | (2) |  |  | (201) |  |  | (155) |  |
| Shares reissued | 10 |  |  | 5 |  |  | 621 |  |  | 505 |  |
| Total treasury shares at end of period | (91,807) |  |  | (92,271) |  |  | (91,807) |  |  | (92,271) |  |
| Total shares outstanding | 84,773 |  |  | 84,309 |  |  | 84,773 |  |  | 84,309 |  |
SHARE REPURCHASES | The following table presents common shares repurchased from shares held in Treasury:
|  | Three months ended September 30, |  | Nine months ended September 30, |
|  | 2021 |  | 2020 |  | 2021 |  | 2020 |
| In the open market: |  |  |  |  |  |  |  |
| Total shares | — |  |  | — |  |  | — |  |  | — |  |
| Total cost | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |
| Average price per share(1) | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |
| From employees:(2) |  |  |  |  |  |  |  |
| Total shares | 4 |  |  | 2 |  |  | 201 |  |  | 155 |  |
| Total cost | $ | 206 |  |  | $ | 84 |  |  | $ | 10,025 |  |  | $ | 8,685 |  |
| Average price per share(1) | $ | 49.91 |  |  | $ | 46.85 |  |  | $ | 49.87 |  |  | $ | 55.94 |  |
| Total shares repurchased: |  |  |  |  |  |  |  |
| Total shares | 4 |  |  | 2 |  |  | 201 |  |  | 155 |  |
| Total cost | $ | 206 |  |  | $ | 84 |  |  | $ | 10,025 |  |  | $ | 8,685 |  |
| Average price per share(1) | $ | 49.91 |  |  | $ | 46.85 |  |  | $ | 49.87 |  |  | $ | 55.94 |  |
(1) Calculated using whole numbers. (2) Shares are repurchased from employees to satisfy withholding tax liabilities related to the vesting of share-settled restricted stock units.
DIVIDENDS | The following table presents dividends declared and paid related to the Company's common and preferred shares:
|  | Per share data |
|  | Dividends declared |  | Dividends paid in period of declaration |  | Dividends paid in period following declaration |
| Three months ended September 30, 2021 |  |  |  |  |  |
| Common shares | $ | 0.42 |  |  | $ | — |  |  | $ | 0.42 |  |
| Series E preferred shares | $ | 34.38 |  |  | $ | — |  |  | $ | 34.38 |  |
| Three months ended September 30, 2020 |  |  |  |  |  |
| Common shares | $ | 0.41 |  |  | $ | — |  |  | $ | 0.41 |  |
| Series E preferred shares | $ | 34.38 |  |  | $ | — |  |  | $ | 34.38 |  |
| Nine months ended September 30, 2021 |  |  |  |  |  |
| Common shares | $ | 1.26 |  |  | $ | 0.84 |  |  | $ | 0.42 |  |
| Series E preferred shares | $ | 103.13 |  |  | $ | 68.75 |  |  | $ | 34.38 |  |
| Nine months ended September 30, 2020 |  |  |  |  |  |
| Common shares | $ | 1.23 |  |  | $ | 0.82 |  |  | $ | 0.41 |  |
| Series E preferred shares | $ | 103.13 |  |  | $ | 68.75 |  |  | $ | 34.38 |  |

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