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Consolidated Statements of Changes in Stockholders' Equity - USD ($) $ in Thousands | Total | Cumulative Effect Period of Adoption Adjustment | Cumulative Effect Period of Adoption Adjusted Balance | Common Stock - Number of Shares, Shares Issued | Common Stock - Number of Shares, Shares Issued Cumulative Effect Period of Adoption Adjusted Balance | Common Stock - Number of Shares, Treasury Shares | Common Stock - Number of Shares, Treasury Shares Cumulative Effect Period of Adoption Adjusted Balance | Additional Paid-in Capital | Additional Paid-in Capital Cumulative Effect Period of Adoption Adjusted Balance | Accumulated Other Comprehensive Income (Loss) | Accumulated Other Comprehensive Income (Loss) Cumulative Effect Period of Adoption Adjusted Balance | Retained Earnings | Retained Earnings Cumulative Effect Period of Adoption Adjustment | Retained Earnings Cumulative Effect Period of Adoption Adjusted Balance
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Balance at beginning of period at Dec. 31, 2018 | $ 552,568 |  |  | $ 33 |  | $ (108,637) |  | $ 569,712 |  | $ (6,079) |  | $ 97,539 |  |
Beginning balance, shares issued (shares) at Dec. 31, 2018 |  |  |  | 33,202,369 |  |  |  |  |  |  |  |  |  |
Beginning balance, treasury stock (shares) at Dec. 31, 2018 |  |  |  |  |  | (2,273,932) |  |  |  |  |  |  |  |
Beginning balance, shares outstanding (shares) at Dec. 31, 2018 |  |  |  | 30,928,437 |  |  |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock options exercised | 2,979 |  |  |  |  |  |  | 2,979 |  |  |  |  |  |
Stock options exercised (shares) |  |  |  | 181,900 |  |  |  |  |  |  |  |  |  |
Restricted stock awards, net of forfeitures (shares) |  |  |  | 91,133 |  |  |  |  |  |  |  |  |  |
Share-based compensation expense | 3,125 |  |  |  |  |  |  | 3,125 |  |  |  |  |  |
Restricted stock surrendered due to employee tax liability | (517) |  |  |  |  | $ (517) |  |  |  |  |  |  |  |
Restricted stock surrendered due to employee tax liability (shares) |  |  |  | (26,846) |  | (26,846) |  |  |  |  |  |  |  |
Repurchase of common stock | (7,362) |  |  |  |  | $ (7,362) |  |  |  |  |  |  |  |
Repurchase of common stock (shares) |  |  |  | (375,000) |  | (375,000) |  |  |  |  |  |  |  |
Cash dividends paid (common stock, $0.96/share, $0.52/share, $0.52/share) | (29,776) |  |  |  |  |  |  |  |  |  |  | (29,776) |  |
Net income | 32,788 |  |  |  |  |  |  |  |  |  |  | 32,788 |  |
Change in unrealized gain (loss) on securities available for sale, net of income taxes | 9,461 |  |  |  |  |  |  |  |  | 9,461 |  |  |  |
Balance at end of period at Dec. 31, 2019 | 563,267 |  |  | $ 33 |  | $ (116,515) |  | 575,816 |  | 3,382 |  | 100,551 |  |
Balance at end of period (ASU 2016-13) at Dec. 31, 2019 |  | $ (12,167) |  |  |  |  |  |  |  |  |  |  | $ (12,167) |
Ending balance, shares issued (shares) at Dec. 31, 2019 |  |  |  | 33,475,402 | 33,475,402 |  |  |  |  |  |  |  |  |
Ending balance, treasury stock (shares) at Dec. 31, 2019 |  |  |  |  |  | (2,675,778) | (2,675,778) |  |  |  |  |  |  |
Ending balance, shares outstanding (shares) at Dec. 31, 2019 |  |  |  | 30,799,624 | 30,799,624 |  |  |  |  |  |  |  |  |
Adjusted balance at Dec. 31, 2019 |  |  | $ 551,100 |  | $ 33 |  | $ (116,515) |  | $ 575,816 |  | $ 3,382 |  |  | $ 88,384
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restricted stock awards, net of forfeitures (shares) |  |  |  | 85,399 |  |  |  |  |  |  |  |  |  |
Share-based compensation expense | 2,544 |  |  |  |  |  |  | 2,544 |  |  |  |  |  |
Restricted stock surrendered due to employee tax liability | (335) |  |  |  |  | $ (335) |  |  |  |  |  |  |  |
Restricted stock surrendered due to employee tax liability (shares) |  |  |  | (31,788) |  | (31,788) |  |  |  |  |  |  |  |
Repurchase of common stock | (2,196) |  |  |  |  | $ (2,196) |  |  |  |  |  |  |  |
Repurchase of common stock (shares) |  |  |  | (135,400) |  | (135,400) |  |  |  |  |  |  |  |
Cash dividends paid (common stock, $0.96/share, $0.52/share, $0.52/share) | (15,960) |  |  |  |  |  |  |  |  |  |  | (15,960) |  |
Net income | 42,196 |  |  |  |  |  |  |  |  |  |  | 42,196 |  |
Change in unrealized gain (loss) on securities available for sale, net of income taxes | (306) |  |  |  |  |  |  |  |  | (306) |  |  |  |
Balance at end of period at Dec. 31, 2020 | $ 577,044 |  |  | $ 33 |  | $ (119,046) |  | 578,360 |  | 3,076 |  | 114,621 |  |
Ending balance, shares issued (shares) at Dec. 31, 2020 |  |  |  | 33,560,801 |  |  |  |  |  |  |  |  |  |
Ending balance, treasury stock (shares) at Dec. 31, 2020 | (2,842,966) |  |  |  |  | (2,842,966) |  |  |  |  |  |  |  |
Ending balance, shares outstanding (shares) at Dec. 31, 2020 |  |  |  | 30,717,835 |  |  |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restricted stock awards, net of forfeitures (shares) |  |  |  | 43,038 |  |  |  |  |  |  |  |  |  |
Share-based compensation expense | $ 2,436 |  |  |  |  |  |  | 2,436 |  |  |  |  |  |
Restricted stock surrendered due to employee tax liability | (572) |  |  |  |  | $ (572) |  |  |  |  |  |  |  |
Restricted stock surrendered due to employee tax liability (shares) |  |  |  | (24,953) |  | (24,953) |  |  |  |  |  |  |  |
Repurchase of common stock | (6,135) |  |  |  |  | $ (6,135) |  |  |  |  |  |  |  |
Repurchase of common stock (shares) |  |  |  | (328,659) |  | (328,659) |  |  |  |  |  |  |  |
Cash dividends paid (common stock, $0.96/share, $0.52/share, $0.52/share) | (16,514) |  |  |  |  |  |  |  |  |  |  | (16,514) |  |
Net income | 98,677 |  |  |  |  |  |  |  |  |  |  | 98,677 |  |
Change in unrealized gain (loss) on securities available for sale, net of income taxes | (11,519) |  |  |  |  |  |  |  |  | (11,519) |  |  |  |
Balance at end of period at Dec. 31, 2021 | $ 643,417 |  |  | $ 33 |  | $ (125,753) |  | $ 580,796 |  | $ (8,443) |  | $ 196,784 |  |
Ending balance, shares issued (shares) at Dec. 31, 2021 |  |  |  | 33,603,839 |  |  |  |  |  |  |  |  |  |
Ending balance, treasury stock (shares) at Dec. 31, 2021 | (3,196,578) |  |  |  |  | (3,196,578) |  |  |  |  |  |  |  |
Ending balance, shares outstanding (shares) at Dec. 31, 2021 |  |  |  | 30,407,261 |  |  |  |  |  |  |  |  |  |

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