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CONSOLIDATED STATEMENTS OF EQUITY - USD ($) $ in Thousands | Common Stock | Additional Paid-In Capital | Retained Earnings | Accumulated Other Comprehensive Income (Loss) | Treasury Shares | Noncontrolling Interests | Total
--- | --- | --- | --- | --- | --- | --- | ---
Accumulated other comprehensive loss, Beginning Balance at Dec. 31, 2019 | $ 9,858 | $ 389,446 | $ 2,736,481 | $ (275,850) | $ (2,041,763) | $ 905 | $ 819,077
Beginning Balance (in shares) at Dec. 31, 2019 | 60,592,000 |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |  |
Net income |  |  | 55,562 |  |  | (7) | 55,555
Unrecognized amounts from defined benefit pension plans, net of tax |  |  |  | 609 |  |  | 609
Unrealized gain (loss) on derivatives designated and qualifying as cash flow hedges, net of tax |  |  |  | (2,369) |  |  | (2,369)
Currency translation adjustment |  |  |  | (70,567) |  | (41) | (70,608)
Cash dividends declared |  |  | (29,280) |  |  |  | (29,280)
Stock-based compensation activity |  | 2,826 |  |  | 1,912 |  | 4,738
Stock-based compensation activity (in shares) | 152,000 |  |  |  |  |  |
Purchase of shares for treasury |  |  |  |  | (109,762) |  | (109,762)
Purchase of shares for treasury (in shares) | (1,357,000) |  |  |  |  |  |
Other |  | (5,176) | 5,176 |  |  |  |
Accumulated other comprehensive loss, Ending Balance at Mar. 31, 2020 | $ 9,858 | 387,096 | 2,767,939 | (348,177) | (2,149,613) | 857 | 667,960
Ending Balance (in shares) at Mar. 31, 2020 | 59,387,000 |  |  |  |  |  |
Accumulated other comprehensive loss, Beginning Balance at Dec. 31, 2019 | $ 9,858 | 389,446 | 2,736,481 | (275,850) | (2,041,763) | 905 | 819,077
Beginning Balance (in shares) at Dec. 31, 2019 | 60,592,000 |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |  |
Net income |  |  |  |  |  |  | 82,568
Unrecognized amounts from defined benefit pension plans, net of tax |  |  |  |  |  |  | (22,427)
Unrealized gain (loss) on derivatives designated and qualifying as cash flow hedges, net of tax |  |  |  |  |  |  | (1,261)
Currency translation adjustment |  |  |  |  |  |  | (56,140)
Accumulated other comprehensive loss, Ending Balance at Jun. 30, 2020 | $ 9,858 | 394,692 | 2,762,833 | (355,620) | (2,152,509) | 857 | 660,111
Ending Balance (in shares) at Jun. 30, 2020 | 59,367,000 |  |  |  |  |  |
Accumulated other comprehensive loss, Beginning Balance at Mar. 31, 2020 | $ 9,858 | 387,096 | 2,767,939 | (348,177) | (2,149,613) | 857 | 667,960
Beginning Balance (in shares) at Mar. 31, 2020 | 59,387,000 |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |  |
Net income |  |  | 26,996 |  |  | 17 | 27,013
Unrecognized amounts from defined benefit pension plans, net of tax |  |  |  | (23,036) |  |  | (23,036)
Unrealized gain (loss) on derivatives designated and qualifying as cash flow hedges, net of tax |  |  |  | 1,108 |  |  | 1,108
Currency translation adjustment |  |  |  | 14,485 |  | (17) | 14,468
Cash dividends declared |  |  | (29,260) |  |  |  | (29,260)
Stock-based compensation activity |  | 4,754 |  |  | 317 |  | 5,071
Stock-based compensation activity (in shares) | 25,000 |  |  |  |  |  |
Purchase of shares for treasury |  |  |  |  | (3,213) |  | (3,213)
Purchase of shares for treasury (in shares) | (45,000) |  |  |  |  |  |
Other |  | 2,842 | (2,842) |  |  |  |
Accumulated other comprehensive loss, Ending Balance at Jun. 30, 2020 | $ 9,858 | 394,692 | 2,762,833 | (355,620) | (2,152,509) | 857 | 660,111
Ending Balance (in shares) at Jun. 30, 2020 | 59,367,000 |  |  |  |  |  |
Accumulated other comprehensive loss, Beginning Balance at Dec. 31, 2020 | $ 9,858 | 409,958 | 2,821,359 | (302,190) | (2,149,714) | 979 | 790,250
Beginning Balance (in shares) at Dec. 31, 2020 | 59,641,000 |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |  |
Net income |  |  | 74,177 |  |  | (44) | 74,133
Unrecognized amounts from defined benefit pension plans, net of tax |  |  |  | 5,060 |  |  | 5,060
Unrealized gain (loss) on derivatives designated and qualifying as cash flow hedges, net of tax |  |  |  | 7,290 |  |  | 7,290
Currency translation adjustment |  |  |  | (22,584) |  | (159) | (22,743)
Cash dividends declared |  |  | (30,572) |  |  |  | (30,572)
Stock-based compensation activity |  | 7,680 |  |  | 1,502 |  | 9,182
Stock-based compensation activity (in shares) | 134,000 |  |  |  |  |  |
Purchase of shares for treasury |  |  |  |  | (28,459) |  | (28,459)
Purchase of shares for treasury (in shares) | (237,000) |  |  |  |  |  |
Other |  | 891 | (741) |  |  | (883) | (733)
Accumulated other comprehensive loss, Ending Balance at Mar. 31, 2021 | $ 9,858 | 418,529 | 2,864,223 | (312,424) | (2,176,671) | (107) | 803,408
Ending Balance (in shares) at Mar. 31, 2021 | 59,538,000 |  |  |  |  |  |
Accumulated other comprehensive loss, Beginning Balance at Dec. 31, 2020 | $ 9,858 | 409,958 | 2,821,359 | (302,190) | (2,149,714) | 979 | 790,250
Beginning Balance (in shares) at Dec. 31, 2020 | 59,641,000 |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |  |
Net income |  |  |  |  |  |  | 170,413
Unrecognized amounts from defined benefit pension plans, net of tax |  |  |  |  |  |  | 3,358
Unrealized gain (loss) on derivatives designated and qualifying as cash flow hedges, net of tax |  |  |  |  |  |  | 2,536
Currency translation adjustment |  |  |  |  |  |  | $ (9,164)
Purchase of shares for treasury (in shares) |  |  |  |  |  |  | (400,000)
Accumulated other comprehensive loss, Ending Balance at Jun. 30, 2021 | $ 9,858 | 427,576 | 2,928,819 | (305,191) | (2,201,397) | (42) | $ 859,623
Ending Balance (in shares) at Jun. 30, 2021 | 59,387,000 |  |  |  |  |  |
Accumulated other comprehensive loss, Beginning Balance at Mar. 31, 2021 | $ 9,858 | 418,529 | 2,864,223 | (312,424) | (2,176,671) | (107) | 803,408
Beginning Balance (in shares) at Mar. 31, 2021 | 59,538,000 |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |  |
Net income |  |  | 96,105 |  |  | 175 | 96,280
Unrecognized amounts from defined benefit pension plans, net of tax |  |  |  | (1,702) |  |  | (1,702)
Unrealized gain (loss) on derivatives designated and qualifying as cash flow hedges, net of tax |  |  |  | (4,754) |  |  | (4,754)
Currency translation adjustment |  |  |  | 13,689 |  | (110) | 13,579
Cash dividends declared |  |  | (30,552) |  |  |  | (30,552)
Stock-based compensation activity |  | 8,638 |  |  | 503 |  | 9,141
Stock-based compensation activity (in shares) | 46,000 |  |  |  |  |  |
Purchase of shares for treasury |  |  |  |  | (25,229) |  | $ (25,229)
Purchase of shares for treasury (in shares) | (197,000) |  |  |  |  |  | (200,000)
Other |  | 409 | (957) |  |  |  | $ (548)
Accumulated other comprehensive loss, Ending Balance at Jun. 30, 2021 | $ 9,858 | $ 427,576 | $ 2,928,819 | $ (305,191) | $ (2,201,397) | $ (42) | $ 859,623
Ending Balance (in shares) at Jun. 30, 2021 | 59,387,000 |  |  |  |  |  |

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