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Common Shareholders' Equity (Details) |  | 1 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jan. 01, 2017 shares | Nov. 30, 2009 shares | Dec. 31, 2022 vote shares
Series A Common Shares |  |  |
Common shareholders' equity, other disclosures |  |  |
Number of votes | vote |  |  | 10
Voting rights for number of board of directors |  |  | 75%
Common Shares |  |  |
Share repurchases |  |  |
Repurchase authorization, cumulative shares authorized (in shares) |  |  | 1,927,000
Stock Repurchase Program Additional Number Of Shares Authorized To Be Repurchased Per Year |  | 1,300,000 |
Common shareholders' equity, other disclosures |  |  |
Number of votes | vote |  |  | 1
Voting rights for number of board of directors |  |  | 25%
Common Shares | Maximum |  |  |
Share repurchases |  |  |
Stock Repurchase Program Additional Number Of Shares Authorized To Be Repurchased Per Year | 1,300,000 |  |
Common Shares | Minimum |  |  |
Share repurchases |  |  |
Stock Repurchase Program Additional Number Of Shares Authorized To Be Repurchased Per Year | 0 |  |
Common Shares | 401(k) |  |  |
Common shareholders' equity, other disclosures |  |  |
Shares reserved (in shares) |  |  | 994,000

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