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CONSOLIDATED STATEMENTS OF EQUITY - USD ($) $ in Thousands | Total | Cumulative Effect, Period of Adoption, Adjustment | Total Shareholders’ Equity | Total Shareholders’ Equity Cumulative Effect, Period of Adoption, Adjustment | Common Stock and Additional Paid-In Capital | Retained Earnings | Retained Earnings Cumulative Effect, Period of Adoption, Adjustment | Cumulative Translation Adjustment | Retirement Benefits Adjustments | Retirement Benefits Adjustments Cumulative Effect, Period of Adoption, Adjustment | Cumulative Unrealized Gain (Loss) on Derivatives | Cumulative Unrealized Gain (Loss) on Derivatives Cumulative Effect, Period of Adoption, Adjustment | Treasury Stock | Noncontrolling Interest
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Beginning balance at Dec. 31, 2017 | $ 1,886,542 |  | $ 1,886,542 |  | $ 717,808 | $ 2,057,915 |  | $ (46,306) | $ (29,154) |  | $ (14,047) |  | $ (799,674) | $ 0
Beginning balance (Accounting Standards Update 2016-16) at Dec. 31, 2017 |  | $ (645) |  | $ (645) |  |  | $ (645) |  |  |  |  |  |  |
Beginning balance (Accounting Standards Update 2018-02) at Dec. 31, 2017 |  | 0 |  | 0 |  |  | 6,435 |  |  | $ (3,411) |  | $ (3,024) |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income | 410,573 |  | 410,573 |  |  | 410,573 |  |  |  |  |  |  |  |
Cumulative translation adjustment | (48,114) |  | (48,114) |  |  |  |  | (48,114) |  |  |  |  |  |
Net change in retirement obligations, net of tax | 9,825 |  | 9,825 |  |  |  |  |  | 9,825 |  |  |  |  |
Net change on derivatives designated as cash flow hedges, net of tax | 5,006 |  | 5,006 |  |  |  |  |  |  |  | 5,006 |  |  |
Issuance of shares of common stock from issuance of unvested shares, performance share units and exercise of stock options | 27,701 |  | 27,701 |  |  |  |  |  |  |  |  |  | 27,701 |
Repurchase of common stock | (173,926) |  | (173,926) |  |  |  |  |  |  |  |  |  | (173,926) |
Share-based compensation | 21,432 |  | 21,432 |  | 21,432 |  |  |  |  |  |  |  |  |
Shares surrendered for tax withholding | (11,555) |  | (11,555) |  |  |  |  |  |  |  |  |  | (11,555) |
Cash dividends declared | (132,199) |  | (132,199) |  |  | (132,199) |  |  |  |  |  |  |  |
Ending balance at Dec. 31, 2018 | $ 1,994,640 | $ 28 | 1,994,640 | $ 28 | 739,240 | 2,342,079 | $ 28 | (94,420) | (22,740) |  | (12,065) |  | (957,454) | 0
Accounting Standards Update [Extensible List] | us-gaap:AccountingStandardsUpdate201602Member |  |  |  |  |  |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income | $ 425,521 |  | 425,521 |  |  | 425,521 |  |  |  |  |  |  |  |
Cumulative translation adjustment | 67 |  | 67 |  |  |  |  | 67 |  |  |  |  |  |
Net change in retirement obligations, net of tax | (3,069) |  | (3,069) |  |  |  |  |  | (3,069) |  |  |  |  |
Net change on derivatives designated as cash flow hedges, net of tax | 4,882 |  | 4,882 |  |  |  |  |  |  |  | 4,882 |  |  |
Issuance of shares of common stock from issuance of unvested shares, performance share units and exercise of stock options | 38,809 |  | 38,809 |  |  |  |  |  |  |  |  |  | 38,809 |
Repurchase of common stock | (54,668) |  | (54,668) |  |  |  |  |  |  |  |  |  | (54,668) |
Share-based compensation | 22,112 |  | 22,112 |  | 22,112 |  |  |  |  |  |  |  |  |
Shares surrendered for tax withholding | (12,596) |  | (12,596) |  |  |  |  |  |  |  |  |  | (12,596) |
Cash dividends declared | (152,497) |  | (152,497) |  |  | (152,497) |  |  |  |  |  |  |  |
Ending balance at Dec. 31, 2019 | 2,263,229 |  | 2,263,229 |  | 761,352 | 2,615,131 |  | (94,353) | (25,809) |  | (7,183) |  | (985,909) | 0
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income | 377,778 |  | 377,778 |  |  | 377,778 |  |  |  |  |  |  |  |
Cumulative translation adjustment | 107,783 |  | 107,783 |  |  |  |  | 107,783 |  |  |  |  |  |
Net change in retirement obligations, net of tax | 1,385 |  | 1,385 |  |  |  |  |  | 1,385 |  |  |  |  |
Net change on derivatives designated as cash flow hedges, net of tax | 4,652 |  | 4,652 |  |  |  |  |  |  |  | 4,652 |  |  |
Issuance of shares of common stock from issuance of unvested shares, performance share units and exercise of stock options | 44,587 |  | 44,587 |  |  |  |  |  |  |  |  |  | 44,587 |
Repurchase of common stock | (110,342) |  | (110,342) |  |  |  |  |  |  |  |  |  | (110,342) |
Share-based compensation | 14,702 |  | 14,702 |  | 14,702 |  |  |  |  |  |  |  |  |
Shares surrendered for tax withholding | (12,208) |  | (12,208) |  |  |  |  |  |  |  |  |  | (12,208) |
Cash dividends declared | (151,363) |  | (151,363) |  |  | (151,363) |  |  |  |  |  |  |  |
Contributions received from joint venture partner | 123 |  | 0 |  |  |  |  |  |  |  |  |  |  | 123
Ending balance at Dec. 31, 2020 | $ 2,540,326 |  | $ 2,540,203 |  | $ 776,054 | $ 2,841,546 |  | $ 13,430 | $ (24,424) |  | $ (2,531) |  | $ (1,063,872) | $ 123

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