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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, 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] |  |  |  |  |
Net income | 45,839 |  | 45,839 |  |
Other comprehensive income (loss) | 23,867 |  |  | 23,867 |
Cash dividends declared : |  |  |  |  |
Common stock at $0.23 per share in 2020 and $0.22 per share in 2019 | (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)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Cumulative Effect of New Accounting Principle in Period of Adoption | 3,127 |  | 2,221 | 906 |
Beginning Balances (in shares) at Dec. 31, 2019 |  | 104,281,794 |  |  | (5,790,796)
Beginning Balances at Dec. 31, 2019 | 2,247,705 | $ 1,640,771 | 711,249 | 13,323 | $ (117,638)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Net income | 28,628 |  | 28,628 |  |
Other comprehensive income (loss) | (1,535) |  |  | (1,535) |
Cash dividends declared : |  |  |  |  |
Common stock at $0.23 per share in 2020 and $0.22 per share in 2019 | (22,342) |  | (22,342) |  |
Treasury Stock, Shares, Acquired |  |  |  |  | (880,000)
Treasury Stock, Value, Acquired, Cost Method | (16,686) |  |  |  | $ (16,686)
Exercise of stock options, net of shares purchased (in shares) |  |  |  |  | 10,405
Exercise of stock options, net of shares purchased | (72) | (140) |  |  | $ (212)
Restricted stock awards, net of forfeitures (in shares) |  |  |  |  | 347,555
Restricted stock awards, net of forfeitures | (1,114) | (8,218) |  |  | $ 7,104
Share-based compensation expense | 1,537 | $ 1,537 |  |  |
Ending Balances (in shares) at Mar. 31, 2020 |  | 104,281,794 |  |  | (6,312,836)
Ending Balances at Mar. 31, 2020 | 2,179,383 | $ 1,633,950 | 660,653 | $ 11,788 | $ (127,008)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Cumulative Effect of New Accounting Principle in Period of Adoption | $ (56,882) |  | $ (56,882) |  |

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