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Earnings Per Common Share - Textual (Details) - USD ($) |  |  |  |  | 1 Months Ended | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Jul. 24, 2018 | Jul. 20, 2017 | Jul. 21, 2016 | Sep. 30, 2009 | Jan. 31, 2020 | Oct. 31, 2019 | Jul. 31, 2019 | Jan. 17, 2017 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016 | Feb. 28, 2014 | Dec. 31, 2013
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Antidilutive shares excluded from computation of diluted weighted-average shares (shares) |  |  |  |  |  |  |  |  | 100,000 | 0 | 200,000 |  |  |
Common stock repurchased |  |  |  |  |  |  |  |  | $ 45,900,000 |  | $ 38,100,000 |  |  |
Cash dividends declared per common share (in dollars per share) |  |  |  |  |  |  |  |  | $ 1.1 | $ 1.04 | $ 0.98 |  |  |
Common stock issued (shares) |  |  |  | 5,000,000.0 |  |  |  | 700,000 |  |  |  |  |  |
Common stock warrants issued |  |  |  | 8,200,000 |  |  |  | 0 |  |  |  | 8,200,000 |  |
Exercise price of warrants (in dollars per share) |  |  |  | $ 41.40 |  |  |  | $ 41.40 |  |  |  | $ 41.40 |  |
Proceeds from exercising stock warrants |  |  |  |  |  |  |  | $ 26,700,000 | $ 0 | $ 0 | $ 26,600,000 |  |  |
Common Stock |  |  |  |  |  |  |  |  |  |  |  |  |  |
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common stock repurchase authorization | $ 250,000,000 |  |  |  |  |  |  |  |  |  |  |  | $ 250,000,000 | $ 200,000,000
Common stock repurchased (shares) |  |  |  |  |  |  |  |  | 800,000 | 0 | 900,000 |  |  |
Common stock repurchased |  |  |  |  |  |  |  |  | $ 45,900,000 |  | $ 38,100,000 |  |  |
Cash dividends declared per common share (in dollars per share) | $ 0.27 | $ 0.25 | $ 0.24 |  |  | $ 0.27 | $ 0.28 |  |  |  |  |  |  |
Cash dividends paid per common share (in dollars per share) | $ 0.27 | $ 0.25 |  |  |  | $ 0.28 |  |  |  |  |  |  |  |
Accrued common stock dividends |  |  |  |  |  |  |  |  | $ 29,000,000.0 | $ 28,400,000 |  |  |  |
Common Stock | Subsequent Event |  |  |  |  |  |  |  |  |  |  |  |  |  |
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash dividends paid per common share (in dollars per share) |  |  |  |  | $ 0.28 |  |  |  |  |  |  |  |  |

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