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Consolidated Statements of Changes in Shareholders' Equity - Unaudited - USD ($) $ in Thousands | Total | Preferred Stock | Common Stock | Additional Paid in Capital | Retained Earnings | Accumulated Other Comprehensive Income (Loss) | Treasury Stock
--- | --- | --- | --- | --- | --- | --- | ---
Beginning balance, preferred stock (shares) at Dec. 31, 2017 |  | 9,000,000 |  |  |  |  |
Beginning balance, common stock (shares) at Dec. 31, 2017 |  |  | 31,382,503 |  |  |  |
Beginning balance at Dec. 31, 2017 | $ 920,964 | $ 217,471 | $ 31,913 | $ 422,096 | $ 258,076 | $ (359) | $ (8,233)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Net income | 53,833 |  |  |  | 53,833 |  |
Other comprehensive income (loss) | (18,555) |  |  |  |  | (18,555) |
Preferred stock dividends | (10,844) |  |  |  | (10,844) |  |
Share-based compensation expense | 5,641 |  |  | 5,641 |  |  |
Exercise of warrants (shares) |  |  | 5,242 |  |  |  |
Exercise of warrants | 112 |  | $ 5 | 107 |  |  |
Issuance of common stock under share-based compensation arrangements (shares) |  |  | 299,595 |  |  |  |
Issuance of common stock under share-based compensation arrangements | 3,661 |  | $ 300 | 3,361 |  |  |
Ending balance, preferred stock (shares) at Sep. 30, 2018 |  | 9,000,000 |  |  |  |  |
Ending balance, common stock (shares) at Sep. 30, 2018 |  |  | 31,687,340 |  |  |  |
Ending balance at Sep. 30, 2018 | 954,812 | $ 217,471 | $ 32,218 | 431,205 | 302,404 | (20,253) | (8,233)
Beginning balance, preferred stock (shares) at Jun. 30, 2018 |  | 9,000,000 |  |  |  |  |
Beginning balance, common stock (shares) at Jun. 30, 2018 |  |  | 31,669,643 |  |  |  |
Beginning balance at Jun. 30, 2018 | 936,227 | $ 217,471 | $ 32,200 | 428,796 | 299,990 | (33,997) | (8,233)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Net income | 6,029 |  |  |  | 6,029 |  |
Other comprehensive income (loss) | 13,744 |  |  |  |  | 13,744 |
Preferred stock dividends | (3,615) |  |  |  | (3,615) |  |
Share-based compensation expense | 1,980 |  |  | 1,980 |  |  |
Issuance of common stock under share-based compensation arrangements (shares) |  |  | 17,697 |  |  |  |
Issuance of common stock under share-based compensation arrangements | 447 |  | $ 18 | 429 | 0 |  |
Ending balance, preferred stock (shares) at Sep. 30, 2018 |  | 9,000,000 |  |  |  |  |
Ending balance, common stock (shares) at Sep. 30, 2018 |  |  | 31,687,340 |  |  |  |
Ending balance at Sep. 30, 2018 | $ 954,812 | $ 217,471 | $ 32,218 | 431,205 | 302,404 | (20,253) | (8,233)
Beginning balance, preferred stock (shares) at Dec. 31, 2018 | 9,000,000 | 9,000,000 |  |  |  |  |
Beginning balance, common stock (shares) at Dec. 31, 2018 | 31,003,028 |  | 31,003,028 |  |  |  |
Beginning balance at Dec. 31, 2018 | $ 956,816 | $ 217,471 | $ 32,252 | 434,314 | 316,651 | (22,663) | (21,209)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Net income | 51,801 |  |  |  | 51,801 |  |
Other comprehensive income (loss) | 14,489 |  |  |  |  | 14,489 |
Preferred stock dividends | (10,844) |  |  |  | (10,844) |  |
Share-based compensation expense | 6,557 |  |  | 6,557 |  |  |
Issuance of common stock under share-based compensation arrangements (shares) |  |  | 273,907 |  |  |  |
Issuance of common stock under share-based compensation arrangements | 902 |  | $ 274 | 628 |  |  |
Repurchase of common shares (shares) |  |  | (31,159) |  |  |  |
Repurchase of common shares | $ (571) |  |  |  |  |  | (571)
Ending balance, preferred stock (shares) at Sep. 30, 2019 | 9,000,000 | 9,000,000 |  |  |  |  |
Ending balance, common stock (shares) at Sep. 30, 2019 | 31,245,776 |  | 31,245,776 |  |  |  |
Ending balance at Sep. 30, 2019 | $ 1,019,150 | $ 217,471 | $ 32,526 | 441,499 | 357,608 | (8,174) | (21,780)
Beginning balance, preferred stock (shares) at Jun. 30, 2019 |  | 9,000,000 |  |  |  |  |
Beginning balance, common stock (shares) at Jun. 30, 2019 |  |  | 31,202,023 |  |  |  |
Beginning balance at Jun. 30, 2019 | 991,405 | $ 217,471 | $ 32,483 | 439,067 | 334,157 | (9,993) | (21,780)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Net income | 27,066 |  |  |  | 27,066 |  |
Other comprehensive income (loss) | 1,819 |  |  |  |  | 1,819 |
Preferred stock dividends | (3,615) |  |  |  | (3,615) |  |
Share-based compensation expense | 2,133 |  |  | 2,133 |  |  |
Issuance of common stock under share-based compensation arrangements (shares) |  |  | 43,753 |  |  |  |
Issuance of common stock under share-based compensation arrangements | $ 342 |  | $ 43 | 299 |  |  |
Ending balance, preferred stock (shares) at Sep. 30, 2019 | 9,000,000 | 9,000,000 |  |  |  |  |
Ending balance, common stock (shares) at Sep. 30, 2019 | 31,245,776 |  | 31,245,776 |  |  |  |
Ending balance at Sep. 30, 2019 | $ 1,019,150 | $ 217,471 | $ 32,526 | $ 441,499 | $ 357,608 | $ (8,174) | $ (21,780)

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