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v3.19.3.a.u2

Subsequent Events (Details) |  |  | 3 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Feb. 26, 2020 $ / shares | Feb. 03, 2020 day $ / shares shares | Dec. 31, 2019 $ / shares | Sep. 30, 2019 $ / shares | Jun. 30, 2019 $ / shares | Mar. 31, 2019 $ / shares | Dec. 31, 2019 $ / shares | Dec. 31, 2018 $ / shares | Dec. 31, 2017 $ / shares
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |
Cash dividends declared per common share (in $ per share) |  |  | $ 0.67 | $ 0.67 | $ 0.55 | $ 0.55 | $ 2.44 | $ 2 | $ 1.8
Subsequent Event |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |
Preferred stock conversion, threshold consecutive trading days | day |  | 20 |  |  |  |  |  |  |
Cash dividends declared per common share (in $ per share) | $ 0.67 |  |  |  |  |  |  |  |
Convertible preferred stock | Subsequent Event |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |
Preferred stock, shares issuable upon conversion (in shares) | shares |  | 1,150,000 |  |  |  |  |  |  |
Conversion ratio |  | 0.7938 |  |  |  |  |  |  |
Conversion price of stock ($ per share) |  | $ 125.97 |  |  |  |  |  |  |
Common Stock | Subsequent Event |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |
Shares issued during period, conversion of convertible preferred stock (in shares) | shares |  | 912,870 |  |  |  |  |  |  |

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