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Consolidated Statement of Equity - USD ($) shares in Thousands, $ in Thousands | Total | Common Stock | Treasury Stock | Capital in Excess of Par Value | Retained Earnings [Member] | Accumulated Other Comprehensive Income | Noncontrolling Interest
--- | --- | --- | --- | --- | --- | --- | ---
Balance at beginning of period at Dec. 31, 2020 | $ 1,752,621 | $ 174,792 | $ (4,075) | $ 981,934 | $ 560,731 | $ 39,366 | $ (127)
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward] |  |  |  |  |  |  |
Comprehensive income | 233,960 | 0 | 0 | 0 | 228,879 | 5,005 | 76
Dividends, Common Stock | (35,568) | 0 | 0 | 0 | 35,568 | 0 | 0
Stock option exercises | 2,364 | 99 | 0 | 2,265 | 0 | 0 | 0
Restricted stock awards, net of forfeitures | 0 | 163 | 0 | (163) | 0 | 0 | 0
Employee share-based compensation earned | 3,500 | 0 | 0 | 3,500 | 0 | 0 | 0
Purchase of Company common stock | $ (106,217) | $ 0 | $ (2,142) | $ (12,304) | $ (91,771) | $ 0 | $ 0
Treasury Stock, Shares, Retired | 0 | 3 | 3 | 0 | 0 | 0 | 0
Balance at end of period at Mar. 31, 2021 | $ 1,850,660 | $ 175,051 | $ (6,214) | $ 975,232 | $ 662,271 | $ 44,371 | $ (51)
Balance at beginning of period at Dec. 31, 2020 | 1,752,621 | 174,792 | (4,075) | 981,934 | 560,731 | 39,366 | (127)
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward] |  |  |  |  |  |  |
Comprehensive income | 398,683 |  |  |  |  |  |
Balance at end of period at Jun. 30, 2021 | 1,918,111 | 175,725 | (7,756) | 984,791 | 714,073 | 51,305 | (27)
Balance at beginning of period at Mar. 31, 2021 | 1,850,660 | 175,051 | (6,214) | 975,232 | 662,271 | 44,371 | (51)
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward] |  |  |  |  |  |  |
Comprehensive income | 164,723 | 0 | 0 | 0 | 157,705 | 6,934 | 84
Dividends, Common Stock | (35,352) | 0 | 0 | 0 | 35,352 | 0 | 0
Stock option exercises | 13,972 | 644 | 0 | 13,328 | 0 | 0 | 0
Restricted stock awards, net of forfeitures | 0 | (3) | 0 | 3 | 0 | 0 | 0
Employee share-based compensation earned | 3,596 | 0 | 0 | 3,596 | 0 | 0 | 0
Purchase of Company common stock | (81,048) | 0 | (1,542) | (8,955) | (70,551) | 0 | 0
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders | 60 | 0 | 0 | 0 | 0 | 0 | 60
Other | (1,620) | (33) | 0 | (1,587) | 0 | 0 | 0
Balance at end of period at Jun. 30, 2021 | 1,918,111 | 175,725 | (7,756) | 984,791 | 714,073 | 51,305 | (27)
Balance at beginning of period at Dec. 31, 2021 | 1,909,449 | 166,822 | (3,708) | 979,096 | 727,021 | 40,214 | 4
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward] |  |  |  |  |  |  |
Comprehensive income | 226,846 | 0 | 0 | 0 | 219,513 | 7,279 | 54
Dividends, Common Stock | $ (39,964) | 0 | 0 | 0 | (39,964) | 0 | 0
Dividends declared per share | $ 250 |  |  |  |  |  |
Stock option exercises | $ 272 | 7 | 0 | 265 | 0 | 0 | 0
Restricted stock awards, net of forfeitures | 0 | 147 | 0 | (147) | 0 | 0 | 0
Employee share-based compensation earned | 3,687 | 0 | 0 | 3,687 | 0 | 0 | 0
Purchase of Company common stock | (256,355) | 0 | (4,104) | (24,613) | (227,638) | 0 | 0
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders | 162 | 0 | 0 | 0 | 0 | 0 | 162
Other | 1,127 | 0 | 0 | 1,127 | 0 | 0 | 0
Balance at end of period at Mar. 31, 2022 | 1,842,646 | 166,976 | (7,812) | 957,161 | 678,932 | 47,493 | (104)
Balance at beginning of period at Dec. 31, 2021 | 1,909,449 | 166,822 | (3,708) | 979,096 | 727,021 | 40,214 | 4
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward] |  |  |  |  |  |  |
Comprehensive income | 346,125 |  |  |  |  |  |
Balance at end of period at Jun. 30, 2022 | 1,839,583 | 167,576 | (9,357) | 968,455 | 679,052 | 33,627 | 230
Balance at beginning of period at Mar. 31, 2022 | 1,842,646 | 166,976 | (7,812) | 957,161 | 678,932 | 47,493 | (104)
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward] |  |  |  |  |  |  |
Comprehensive income | 119,279 | 0 | 0 | 0 | 132,670 | (13,866) | 475
Dividends, Common Stock | $ (39,663) | 0 | 0 | 0 | (39,663) | 0 | 0
Dividends declared per share | $ 250 |  |  |  |  |  |
Stock option exercises | $ 15,925 | 574 | 0 | 15,351 | 0 | 0 | 0
Restricted stock awards, net of forfeitures | 0 | 2 | 0 | (2) | 0 | 0 | 0
Employee share-based compensation earned | 3,713 | 0 | 0 | 3,713 | 0 | 0 | 0
Purchase of Company common stock | (103,759) | 0 | (1,545) | (9,327) | (92,887) | 0 | 0
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders | 141 | 0 | 0 | 0 | 0 | 0 | 141
Other | (1,583) | (24) | 0 | (1,559) | 0 | 0 | 0
Balance at end of period at Jun. 30, 2022 | $ 1,839,583 | $ 167,576 | $ (9,357) | $ 968,455 | $ 679,052 | $ 33,627 | $ 230

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