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CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY - USD ($) $ in Thousands | Total | Common Stock | Retained earnings | Accumulated other comprehensive income (loss) | Treasury stock
--- | --- | --- | --- | --- | ---
Beginning Balances (in shares) at Dec. 31, 2017 |  | 68,730,731 |  |  | (6,661,644)
Beginning Balances at Dec. 31, 2017 | $ 930,664 | $ 573,109 | $ 491,847 | $ (20,390) | $ (113,902)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification | 0 |  | 5,093 | (5,093) |
Net income | 30,506 |  | 30,506 |  |
Other comprehensive income (loss) | (9,351) |  |  | (9,351) |
Cash dividends declared : |  |  |  |  |
Common stock at $0.22 per share in 2019 and $0.19 per share in 2018 | (11,797) |  | (11,797) |  |
Stock Issued During Period, Shares, Other |  |  |  |  | 1,428
Adjustments to Additional Paid in Capital, Other | 0 | (24) |  |  | $ 24
Exercise of stock options, net of shares purchased (in shares) |  |  |  |  | 11,800
Exercise of stock options, net of shares purchased | 137 | (65) |  |  | $ 202
Restricted stock awards, net of forfeitures (in shares) |  |  |  |  | 131,508
Restricted stock awards, net of forfeitures | (2,128) | (3,517) |  |  | $ 1,389
Share-based compensation expense | 1,954 | $ 1,954 |  |  |
Ending Balances (in shares) at Mar. 31, 2018 |  | 68,730,731 |  |  | (6,516,908)
Ending Balances at Mar. 31, 2018 | 939,985 | $ 571,457 | 515,649 | (34,834) | $ (112,287)
Beginning Balances (in shares) at Dec. 31, 2018 |  | 104,281,794 |  |  | (6,387,508)
Beginning Balances at Dec. 31, 2018 | 2,078,249 | $ 1,633,256 | 600,014 | (44,408) | $ (110,613)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification | 3,127 |  | 2,221 | 906 |
Net income | 45,839 |  | 45,839 |  |
Other comprehensive income (loss) | 23,867 |  |  | 23,867 |
Cash dividends declared : |  |  |  |  |
Common stock at $0.22 per share in 2019 and $0.19 per share in 2018 | (21,666) |  | (21,666) |  |
Stock Issued During Period, Shares, Other |  |  |  |  | 452,134
Adjustments to Additional Paid in Capital, Other | 0 | (7,830) |  |  | $ 7,830
Exercise of stock options, net of shares purchased (in shares) |  |  |  |  | 20,424
Exercise of stock options, net of shares purchased | 90 | (264) |  |  | $ 354
Restricted stock awards, net of forfeitures (in shares) |  |  |  |  | 247,028
Restricted stock awards, net of forfeitures | (2,083) | (5,604) |  |  | $ 3,521
Share-based compensation expense | 2,996 | $ 2,996 |  |  |
Ending Balances (in shares) at Mar. 31, 2019 |  | 104,281,794 |  |  | (5,667,922)
Ending Balances at Mar. 31, 2019 | $ 2,130,419 | $ 1,622,554 | $ 626,408 | $ (19,635) | $ (98,908)

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