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Franchising and Marketing Activities (Tables) | 12 Months Ended
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Dec. 31, 2020
Franchising and Marketing Activities [Abstract] |
Schedule of the Number of Franchised and Company Owned Outlets in Operation [Table Text Block] | The number of franchised and company owned offices in operation are as follows:
| (Unaudited) As of December 31,
| 2020 |  | 2019 |  | 2018
Franchised (domestic and international): |  |  |  |  |
Century 21® | 13,222 |  |  | 11,640 |  |  | 9,637 |
ERA® | 2,318 |  |  | 2,301 |  |  | 2,331 |
Coldwell Banker® | 2,263 |  |  | 2,323 |  |  | 2,380 |
Coldwell Banker Commercial® | 168 |  |  | 159 |  |  | 171 |
Sotheby’s International Realty® | 952 |  |  | 962 |  |  | 949 |
Better Homes and Gardens® Real Estate | 389 |  |  | 391 |  |  | 362 |
Corcoran® | 74 |  |  | — |  |  | — |
Total Franchised | 19,386 |  |  | 17,776 |  |  | 15,830 |
Company owned: |  |  |  |  |
Coldwell Banker® | 605 |  |  | 634 |  |  | 672 |
Sotheby’s International Realty® | 39 |  |  | 37 |  |  | 41 |
Corcoran® | 29 |  |  | 42 |  |  | 42 |
Total Company Owned | 673 |  |  | 713 |  |  | 755 |
Schedule of the Changes in the Number of Franchised and Company Owned Outlets [Table Text Block] | The number of franchised and company owned offices (in the aggregate) changed as follows:
| (Unaudited) For the Year Ended December 31,
| 2020 |  | 2019 |  | 2018
Franchised (domestic and international): |  |  |  |  |
Beginning balance | 17,776 |  |  | 15,830 |  |  | 14,039 |
Additions | 2,109 |  |  | 2,399 |  |  | 2,149 |
Terminations | (499) |  |  | (453) |  |  | (358) |
Ending balance | 19,386 |  |  | 17,776 |  |  | 15,830 |
Company owned: |  |  |  |  |
Beginning balance | 713 |  |  | 755 |  |  | 789 |
Additions | 5 |  |  | 4 |  |  | 8 |
Closures | (45) |  |  | (46) |  |  | (42) |
Ending balance | 673 |  |  | 713 |  |  | 755 |

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