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CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (Unaudited) - USD ($) $ in Thousands | Common Stock [Member] | Additional Paid-In Capital [Member] | Earnings Reinvested in the Business [Member] | Treasury Stock [Member] | Accumulated Other Comprehensive Income (Loss) [Member] | Total
--- | --- | --- | --- | --- | --- | ---
Beginning balance at Dec. 31, 2017 | $ 5,396 | $ 107,176 | $ 1,414,485 | $ (525,422) | $ (149,334) | $ 852,301
Beginning balance (in shares) at Dec. 31, 2017 |  |  |  | 10,759,291 |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Net earnings | 0 | 0 | 77,317 | $ 0 | 0 | 77,317
Other comprehensive income (loss) | 0 | 0 | 0 | 0 | (12,782) | (12,782)
Cash dividends paid | 0 | 0 | (28,244) | 0 | 0 | (28,244)
Share-based compensation | 0 | 1,783 | 0 | 0 | 0 | 1,783
Stock options exercised | 0 | (80) | 0 | $ 200 | 0 | 120
Stock options exercised (in shares) |  |  |  | (4,000) |  |
Non-vested stock issued upon vesting | 0 | (5,454) | 0 | $ 5,454 | 0 | 0
Non-vested stock issued upon vesting (in shares) |  |  |  | (111,185) |  |
Benefit plans | 0 | 350 | 0 | $ 769 | 0 | 1,119
Benefit plans (in shares) |  |  |  | (15,126) |  |
Purchase of treasury stock | 0 | 0 | 0 | $ (72,704) | 0 | (72,704)
Purchase of treasury stock (in shares) |  |  |  | 1,000,000 |  |
Other | 0 | (832) | 418 | $ (2,067) | 0 | (2,481)
Other (in shares) |  |  |  | 42,243 |  |
Ending balance at Jun. 30, 2018 | 5,396 | 102,943 | 1,463,976 | $ (593,770) | (162,116) | 816,429
Ending balance (in shares) at Jun. 30, 2018 |  |  |  | 11,671,223 |  |
Beginning balance at Mar. 31, 2018 | 5,396 | 103,099 | 1,438,823 | $ (594,392) | (125,470) | 827,456
Beginning balance (in shares) at Mar. 31, 2018 |  |  |  | 11,683,443 |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Net earnings | 0 | 0 | 39,123 | $ 0 | 0 | 39,123
Other comprehensive income (loss) | 0 | 0 | 0 | 0 | (36,646) | (36,646)
Cash dividends paid | 0 | 0 | (13,970) | 0 | 0 | (13,970)
Share-based compensation | 0 | 529 | 0 | 0 | 0 | 529
Stock options exercised | 0 | (42) | 0 | $ 102 | 0 | 60
Stock options exercised (in shares) |  |  |  | (2,000) |  |
Non-vested stock issued upon vesting | 0 | (612) | 0 | $ 612 | 0 | 0
Non-vested stock issued upon vesting (in shares) |  |  |  | (12,033) |  |
Other | 0 | (31) | 0 | $ (92) | 0 | (123)
Other (in shares) |  |  |  | 1,813 |  |
Ending balance at Jun. 30, 2018 | 5,396 | 102,943 | 1,463,976 | $ (593,770) | (162,116) | 816,429
Ending balance (in shares) at Jun. 30, 2018 |  |  |  | 11,671,223 |  |
Beginning balance at Dec. 31, 2018 | 5,396 | 101,663 | 1,516,243 | $ (597,800) | (165,555) | 859,947
Beginning balance (in shares) at Dec. 31, 2018 |  |  |  | 11,731,223 |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Net earnings | 0 | 0 | 67,138 | $ 0 | 0 | 67,138
Other comprehensive income (loss) | 0 | 0 | 0 | 0 | 2,012 | 2,012
Cash dividends paid | 0 | 0 | (30,453) | 0 | 0 | (30,453)
Share-based compensation | 0 | (1,155) | 0 | 0 | 0 | (1,155)
Non-vested stock issued upon vesting | 0 | (2,331) | 0 | $ 2,331 | 0 | 0
Non-vested stock issued upon vesting (in shares) |  |  |  | (45,741) |  |
Benefit plans | 0 | 72 | 0 | $ 948 | 0 | 1,020
Benefit plans (in shares) |  |  |  | (18,597) |  |
Other | 0 | (212) | 0 | $ (815) | 0 | (1,027)
Other (in shares) |  |  |  | 15,991 |  |
Ending balance at Jun. 30, 2019 | 5,396 | 98,037 | 1,552,928 | $ (595,336) | (163,543) | 897,482
Ending balance (in shares) at Jun. 30, 2019 |  |  |  | 11,682,876 |  |
Beginning balance at Mar. 31, 2019 | 5,396 | 100,485 | 1,533,832 | $ (595,718) | (166,271) | 877,724
Beginning balance (in shares) at Mar. 31, 2019 |  |  |  | 11,690,379 |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Net earnings | 0 | 0 | 34,331 | $ 0 | 0 | 34,331
Other comprehensive income (loss) | 0 | 0 | 0 | 0 | 2,728 | 2,728
Cash dividends paid | 0 | 0 | (15,235) | 0 | 0 | (15,235)
Share-based compensation | 0 | (1,842) | 0 | 0 | 0 | (1,842)
Non-vested stock issued upon vesting | 0 | (547) | 0 | $ 547 | 0 | 0
Non-vested stock issued upon vesting (in shares) |  |  |  | (10,725) |  |
Other | 0 | (59) | 0 | $ (165) | 0 | (224)
Other (in shares) |  |  |  | 3,222 |  |
Ending balance at Jun. 30, 2019 | $ 5,396 | $ 98,037 | $ 1,552,928 | $ (595,336) | $ (163,543) | $ 897,482
Ending balance (in shares) at Jun. 30, 2019 |  |  |  | 11,682,876 |  |

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