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Stockholders' Equity (Narrative) (Details) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2019 vote shares | Dec. 31, 2018 shares
Class of Stock [Line Items] |  |
Common stock, number of votes | vote | 1 |
Preferred stock, shares authorized (in shares) | shares | 1,000,000 | 1,000,000
Preferred stock, shares outstanding (in shares) | shares | 0 |
Common Class B |  |
Class of Stock [Line Items] |  |
Common stock, number of votes | vote | 10 |
Conversion ratio | 1 |

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