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Equity Transactions - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands |  | 3 Months Ended | 6 Months Ended
--- | --- | --- | ---
May 13, 2021 | Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020
Equity [Abstract] |  |  |  |  |
Cash dividends declared per common share (in $ per share) | $ 0.82 | $ 0.82 | $ 0.67 | $ 1.64 | $ 1.34
Repurchases of common shares (in shares) |  | 26,921 |  | 46,833 |
Weighted average price (in $ per share) |  | $ 278.56 |  | $ 266.87 |
Total cost of shares repurchased |  | $ 7,500 | $ 7,500 | $ 12,499 | $ 17,500
Shares available for repurchase (in shares) |  | 675,809 |  | 675,809 |

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