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v3.20.2

Consolidated Statements of Shareholders' Equity - USD ($) shares in Thousands, $ in Thousands | Common Stock | Surplus | Retained Earnings | Other Comprehensive Income (Loss) | Treasury Stock | Total
--- | --- | --- | --- | --- | --- | ---
Balance at Dec. 31, 2018 | $ 96,104 | $ 145,283 | $ 2,064,134 | $ (54,634) | $ (311,305) | $ 1,939,582
Balance (in shares) at Dec. 31, 2018 | 96,104 |  |  |  |  |
Increase (decrease) in shareholders' equity |  |  |  |  |  |
Net Income |  |  | 101,926 |  |  | 101,926
Dividends: |  |  |  |  |  |
Cash |  |  | (32,821) |  |  | (32,821)
Purchase of treasury stock |  |  |  |  | (128) | (128)
Exercise of stock options | $ 47 | 827 |  |  |  | 874
Exercise of stock options (in shares) | 47 |  |  |  |  |
Stock compensation expense recognized in earnings |  | 504 |  |  |  | 504
Other comprehensive income, net of tax: |  |  |  |  |  |
Net change in unrealized gains and losses on available for sale securities, net of reclassification adjustments |  |  |  | 50,382 |  | 50,382
Balance at Jun. 30, 2019 | $ 96,151 | 146,614 | 2,133,239 | (4,252) | (311,433) | 2,060,319
Balance (in shares) at Jun. 30, 2019 | 96,151 |  |  |  |  |
Balance at Mar. 31, 2019 | $ 96,137 | 146,113 | 2,083,219 | (29,405) | (311,359) | 1,984,705
Balance (in shares) at Mar. 31, 2019 | 96,137 |  |  |  |  |
Increase (decrease) in shareholders' equity |  |  |  |  |  |
Net Income |  |  | 50,020 |  |  | 50,020
Dividends: |  |  |  |  |  |
Purchase of treasury stock |  |  |  |  | (74) | (74)
Exercise of stock options | $ 14 | 262 |  |  |  | 276
Exercise of stock options (in shares) | 14 |  |  |  |  |
Stock compensation expense recognized in earnings |  | 239 |  |  |  | 239
Other comprehensive income, net of tax: |  |  |  |  |  |
Net change in unrealized gains and losses on available for sale securities, net of reclassification adjustments |  |  |  | 25,153 |  | 25,153
Balance at Jun. 30, 2019 | $ 96,151 | 146,614 | 2,133,239 | (4,252) | (311,433) | 2,060,319
Balance (in shares) at Jun. 30, 2019 | 96,151 |  |  |  |  |
Balance at Dec. 31, 2019 | $ 96,215 | 148,075 | 2,200,568 | 2,345 | (329,150) | 2,118,053
Balance (in shares) at Dec. 31, 2019 | 96,215 |  |  |  |  |
Increase (decrease) in shareholders' equity |  |  |  |  |  |
Net Income |  |  | 76,348 |  |  | 76,348
Dividends: |  |  |  |  |  |
Cash |  |  | (35,128) |  |  | (35,128)
Purchase of treasury stock |  |  |  |  | (48,737) | (48,737)
Exercise of stock options | $ 14 | 274 |  |  |  | 288
Exercise of stock options (in shares) | 14 |  |  |  |  |
Stock compensation expense recognized in earnings |  | 395 |  |  |  | 395
Other comprehensive income, net of tax: |  |  |  |  |  |
Net change in unrealized gains and losses on available for sale securities, net of reclassification adjustments |  |  |  | 38,974 |  | 38,974
Balance at Jun. 30, 2020 | $ 96,229 | 148,744 | 2,233,455 | 41,319 | (377,887) | 2,141,860
Balance (in shares) at Jun. 30, 2020 | 96,229 |  |  |  |  |
Balance at Mar. 31, 2020 | $ 96,226 | 148,508 | 2,191,946 | 64,352 | (358,521) | 2,142,511
Balance (in shares) at Mar. 31, 2020 | 96,226 |  |  |  |  |
Increase (decrease) in shareholders' equity |  |  |  |  |  |
Net Income |  |  | 41,509 |  |  | 41,509
Dividends: |  |  |  |  |  |
Purchase of treasury stock |  |  |  |  | (19,366) | (19,366)
Exercise of stock options | $ 3 | 59 |  |  |  | 62
Exercise of stock options (in shares) | 3 |  |  |  |  |
Stock compensation expense recognized in earnings |  | 177 |  |  |  | 176
Other comprehensive income, net of tax: |  |  |  |  |  |
Net change in unrealized gains and losses on available for sale securities, net of reclassification adjustments |  |  |  | (23,033) |  | (23,033)
Balance at Jun. 30, 2020 | $ 96,229 | $ 148,744 | 2,233,455 | $ 41,319 | $ (377,887) | 2,141,860
Balance (in shares) at Jun. 30, 2020 | 96,229 |  |  |  |  |
Dividends: |  |  |  |  |  |
Cumulative adjustment for adoption of new accounting standards, net of tax |  |  | $ (8,333) |  |  | $ (8,333)

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