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Equity (Details) - USD ($) $ / shares in Units, $ in Thousands |  |  | 3 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Feb. 26, 2020 | Feb. 15, 2020 | Dec. 31, 2019 | Sep. 30, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |  |  |  |  |
Common stock authorized to be repurchased (in shares) |  |  | 4,200,000 |  |  |  | 4,200,000 |  |
Remaining common stock authorized for repurchase (in shares) |  |  |  |  |  |  |  | 252,438 |
Shares repurchased during period |  |  |  |  |  |  | 372,365 |  |
Value of shares repurchased |  |  |  |  |  |  | $ 40,000 | $ 27,501 | $ 7,502
Treasury stock, common shares |  |  | 3,927,607 |  |  |  | 3,927,607 |  |
Cost of shares repurchased |  |  |  |  |  |  | $ 419,200 |  |
Weighted average price (in $ per share) |  |  |  |  |  |  | $ 106.72 |  |
Cash dividends declared per common share (in $ per share) |  |  | $ 0.67 | $ 0.67 | $ 0.55 | $ 0.55 | $ 2.44 | $ 2 | $ 1.8
Cash dividends declared, common |  |  |  |  |  |  | $ 18,130 | $ 15,267 | $ 13,545
Cash dividends declared per preferred share (in $ per share) |  |  | $ 1.8125 | $ 1.8125 | $ 1.8125 | $ 1.8125 | $ 7.25 | $ 7.25 | $ 7.25
Cash dividends declared. preferred |  |  |  |  |  |  | $ 8,337 | $ 8,337 | $ 8,337
Dividends payable |  |  | $ 8,915 |  |  |  | $ 8,915 | $ 7,762 |
Subsequent Event |  |  |  |  |  |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |  |  |  |  |
Cash dividends declared per common share (in $ per share) | $ 0.67 |  |  |  |  |  |  |  |
Cash dividends declared, common |  | $ 6,800 |  |  |  |  |  |  |
Cash dividends declared. preferred |  | $ 2,100 |  |  |  |  |  |  |

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