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Consolidated Statements of Equity [Parenthetical] - shares | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Restricted stock issuances (in shares) | 48,482 | 59,038 | 41,322
Common Stock |  |  |
Common stock issuance from conversion of exchangeable notes (in shares) |  | 123,808,000 | 57,729,000
Conversion from Class B to common stock (in shares) | 2,271 |  |

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