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v3.20.1

Capital Stock (Details) | 3 Months Ended | 40 Months Ended |  |
--- | --- | --- | --- | ---
Mar. 31, 2020 USD ($) director common_share | Mar. 31, 2019 USD ($) $ / shares | Feb. 29, 2020 USD ($) | Feb. 28, 2020 USD ($) | Nov. 30, 2016 USD ($)
Class of Stock [Line Items] |  |  |  |  |
Classes of common shares | common_share | 2 |  |  |  |
Stock repurchased during period, value |  | $ 584,000 |  |  |
Minimum |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |
Minimum number of directors up for election to entitle shareholders to vote | director | 0.3333 |  |  |  |
Maximum |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |
Minimum number of directors up for election to entitle shareholders to vote | director | 3 |  |  |  |
Common stock, Class A |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |
Stock repurchase program, authorized amount |  |  |  | $ 100,000,000 | $ 100,000,000
Stock repurchased during period, value | $ 0 | $ 600,000 | $ 50,300,000 |  |
Common stock, Class A | Minimum |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |
Stock repurchased during period (in dollars per share) | $ / shares |  | $ 15.54 |  |  |
Common stock, Class A | Maximum |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |
Stock repurchased during period (in dollars per share) | $ / shares |  | $ 18.72 |  |  |

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