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CONSOLIDATED STATEMENTS OF STOCKHOLDERS' INVESTMENT - USD ($) shares in Thousands, $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |
Beginning Balance | $ 1,879,933 | $ 1,670,730 | $ 1,595,087
Net income | 844,245 | 506,421 | 576,968
Foreign currency adjustments | (15,136) | 30,151 | (4,214)
Dividends declared | (280,217) | (278,422) | (277,727)
Stock issued for employee benefit plans | 43,949 | 89,803 | 47,977
Issuance of restricted stock, net of forfeitures | 0 |  |
Issuance of restricted stock |  | 0 | 0
Stock-based compensation expense | 129,977 | 43,995 | 39,083
Repurchase of common stock | (580,817) | (182,745) | (306,444)
Ending Balance | $ 2,021,934 | $ 1,879,933 | $ 1,670,730
Common Stock |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |
Beginning Balance (in shares) | 134,298 | 134,895 | 137,284
Beginning Balance | $ 13,430 | $ 13,490 | $ 13,728
Stock issued for employee benefit plans (in shares) | 1,068 | 1,754 | 1,017
Stock issued for employee benefit plans | $ 107 | $ 175 | $ 102
Issuance of restricted stock, net of forfeitures | $ (3) |  |
Issuance of restricted stock, net of forfeitures | (26) |  |
Issuance of restricted stock (in shares) |  | 192 | 28
Issuance of restricted stock |  | $ 19 | $ 3
Stock-based compensation expense (in shares) | 0 | 0 | 0
Stock-based compensation expense | $ 0 | $ 0 | $ 0
Repurchase of common stock (in shares) | (6,154) | (2,543) | (3,434)
Repurchase of common stock | $ (615) | $ (254) | $ (343)
Ending Balance (in shares) | 129,186 | 134,298 | 134,895
Ending Balance | $ 12,919 | $ 13,430 | $ 13,490
Additional Paid-in Capital |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |
Beginning Balance | 566,022 | 546,646 | 521,486
Stock issued for employee benefit plans | (22,374) | (24,600) | (13,920)
Issuance of restricted stock, net of forfeitures | 3 |  |
Issuance of restricted stock |  | (19) | (3)
Stock-based compensation expense | 129,977 | 43,995 | 39,083
Ending Balance | 673,628 | 566,022 | 546,646
Retained Earnings |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |
Beginning Balance | 4,372,833 | 4,144,834 | 3,845,593
Net income | 844,245 | 506,421 | 576,968
Dividends declared | (280,217) | (278,422) | (277,727)
Ending Balance | 4,936,861 | 4,372,833 | 4,144,834
Accumulated Other Comprehensive Loss |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |
Beginning Balance | (45,998) | (76,149) | (71,935)
Foreign currency adjustments | (15,136) | 30,151 | (4,214)
Ending Balance | (61,134) | (45,998) | (76,149)
Treasury Stock |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |
Beginning Balance | (3,026,354) | (2,958,091) | (2,713,785)
Stock issued for employee benefit plans | 66,216 | 114,228 | 61,795
Stock-based compensation expense | 0 | 0 | 0
Repurchase of common stock | (580,202) | (182,491) | (306,101)
Ending Balance | $ (3,540,340) | $ (3,026,354) | $ (2,958,091)

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