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CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY - USD ($) $ in Thousands | Total | Common Stock | Additional Paid-in Capital | Retained Earnings | Treasury Stock | Accumulated Other Comprehensive (Loss)/Income | Reclassifications Related to Funded Status of Pension | Reclassifications Related to Unrealized Gains on Available for Sale Securities
--- | --- | --- | --- | --- | --- | --- | --- | ---
Beginning Balance at Dec. 31, 2017 |  | $ 884,031 | $ 90,326 | $ 216,106 | $ 628,107 | $ (32,081) | $ (18,427) |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |
Net income |  | 47,599 |  |  | 47,599 |  |  |  |
Other comprehensive income (loss), net of tax |  | (8,229) |  |  |  |  | (8,229) |  |
Reclassification of tax effects from the Tax Act | ASU No. 2018-02 | [1] | 0 |  |  | 3,427 |  | (3,427) | $ (3,660) | $ 233
Cash dividends declared |  | (16,391) |  |  | (16,391) |  |  |  |
Treasury stock issued for restricted awards |  | (656) |  |  | (1,492) | 836 |  |  |
Recognition of restricted stock compensation expense |  | 779 |  | 779 |  |  |  |  |
Ending Balance at Jun. 30, 2018 |  | 907,133 | 90,326 | 216,885 | 662,112 | (31,245) | (30,945) |  |
Beginning Balance at Mar. 31, 2018 |  | 895,407 | 90,326 | 216,618 | 649,925 | (31,509) | (29,953) |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |
Net income |  | 21,436 |  |  | 21,436 |  |  |  |
Other comprehensive income (loss), net of tax |  | (1,256) |  |  |  |  | (1,256) |  |
Reclassification of tax effects from the Tax Act | ASU No. 2018-02 | [2] | 0 |  |  | (264) |  | 264 |  |
Cash dividends declared |  | (8,722) |  |  | (8,722) |  |  |  |
Treasury stock issued for restricted awards |  | 1 |  |  | (263) | 264 |  |  |
Recognition of restricted stock compensation expense |  | 267 |  | 267 |  |  |  |  |
Ending Balance at Jun. 30, 2018 |  | 907,133 | 90,326 | 216,885 | 662,112 | (31,245) | (30,945) |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |
Effect of new accounting pronouncement on Consolidated Financial Statements | ASU No. 2016-01 | [3] | 0 |  |  | 862 |  | (862) |  |
Beginning Balance at Dec. 31, 2018 |  | 935,761 | 90,326 | 210,345 | 701,819 | (43,622) | (23,107) |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |
Net income |  | 49,029 |  |  | 49,029 |  |  |  |
Other comprehensive income (loss), net of tax |  | 13,588 |  |  |  |  | 13,588 |  |
Cash dividends declared |  | (18,559) |  |  | (18,559) |  |  |  |
Treasury stock issued for restricted awards |  | (891) |  |  | (1,879) | 988 |  |  |
Repurchase of common stock |  | (15,122) |  |  |  | (15,122) |  |  |
Recognition of restricted stock compensation expense |  | 980 |  | 980 |  |  |  |  |
Ending Balance at Jun. 30, 2019 |  | 964,953 | 90,326 | 211,325 | 730,577 | (57,756) | (9,519) |  |
Beginning Balance at Mar. 31, 2019 |  | 943,156 | 90,326 | 210,949 | 716,078 | (57,266) | (16,931) |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |
Net income |  | 26,101 |  |  | 26,101 |  |  |  |
Other comprehensive income (loss), net of tax |  | 7,412 |  |  |  |  | 7,412 |  |
Cash dividends declared |  | (9,242) |  |  | (9,242) |  |  |  |
Treasury stock issued for restricted awards |  | (15) |  |  | (2,360) | 2,345 |  |  |
Repurchase of common stock |  | (2,835) |  |  |  | (2,835) |  |  |
Recognition of restricted stock compensation expense |  | 376 |  | 376 |  |  |  |  |
Ending Balance at Jun. 30, 2019 |  | $ 964,953 | $ 90,326 | $ 211,325 | $ 730,577 | $ (57,756) | $ (9,519) |  |
[1] | Reclassification due to the adoption of ASU No. 2018-02, $(3,660) relates to funded status of pension and $233 relates to net unrealized gains on available-for-sale securities.
[2] | Reclassification due to the adoption of ASU No. 2018-02 related to funded status of pension.
[3] | Reclassification due to the adoption of ASU No. 2016-01.

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