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CONSOLIDATED STATEMENTS OF STOCKHOLDERS' INVESTMENT - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Dec. 31, 2018 | Mar. 31, 2018 | Dec. 31, 2017 | Mar. 31, 2017 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016 | Jan. 01, 2018
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Beginning Balance |  | $ 1,425,745 |  | $ 1,257,847 | $ 1,425,745 | $ 1,257,847 | $ 1,150,450 |
Net income | $ 187,150 | $ 142,297 | $ 152,556 | $ 122,080 | 664,505 | 504,893 | 513,384 |
Cumulative Effect Change - ASU 2014-09 |  |  |  |  |  |  |  | $ 9,239
Foreign currency translation |  |  |  |  | (53,475) | 42,982 | (23,496) |
Dividends declared, $1.88 in 2018, $1.81 in 2017, and $1.74 in 2016 per share |  |  |  |  | (265,244) | (258,378) | (245,426) |
Stock issued for employee benefit plans |  |  |  |  | $ 30,018 | 16,572 | (17,405) |
Issuance of restricted stock (in shares) |  |  |  |  | 1,696,609 |  |  |
Issuance of restricted stock |  |  |  |  | $ 0 | 0 | 0 |
Stock-based compensation expense |  |  |  |  | 87,791 | 41,814 | 38,554 |
Excess tax benefit on deferred compensation and employee stock plans |  |  |  |  |  |  | 18,462 |
Repurchase of common stock |  |  |  |  | (303,492) | (179,985) | (176,676) |
Ending Balance | $ 1,595,087 |  | $ 1,425,745 |  | $ 1,595,087 | $ 1,425,745 | $ 1,257,847 |
Common Stock |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Beginning Balance (in shares) |  | 139,542,000 |  | 141,258,000 | 139,542,000 | 141,258,000 | 143,455,000 |
Beginning Balance |  | $ 13,954 |  | $ 14,126 | $ 13,954 | $ 14,126 | $ 14,345 |
Stock issued for employee benefit plans (in shares) |  |  |  |  | 764,000 | 612,000 | 32,000 |
Stock issued for employee benefit plans |  |  |  |  | $ 76 | $ 61 | $ 3 |
Issuance of restricted stock (in shares) |  |  |  |  | 297,000 | 97,000 | 221,000 |
Issuance of restricted stock |  |  |  |  | $ 30 | $ 10 | $ 22 |
Stock-based compensation expense (in shares) |  |  |  |  | 0 | 1,000 | 17,000 |
Stock-based compensation expense |  |  |  |  | $ 0 | $ 0 | $ 3 |
Repurchase of common stock (in shares) |  |  |  |  | (3,319,000) | (2,426,000) | (2,467,000) |
Repurchase of common stock |  |  |  |  | $ (332) | $ (243) | $ (247) |
Ending Balance (in shares) | 137,284,000 |  | 139,542,000 |  | 137,284,000 | 139,542,000 | 141,258,000 |
Ending Balance | $ 13,728 |  | $ 13,954 |  | $ 13,728 | $ 13,954 | $ 14,126 |
Additional Paid-in Capital |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Beginning Balance |  | 444,280 |  | 419,280 | 444,280 | 419,280 | 379,444 |
Stock issued for employee benefit plans |  |  |  |  | (10,547) | (16,760) | (16,121) |
Issuance of restricted stock |  |  |  |  | (30) | (10) | (22) |
Stock-based compensation expense |  |  |  |  | 87,783 | 41,770 | 37,517 |
Excess tax benefit on deferred compensation and employee stock plans |  |  |  |  |  |  | 18,462 |
Ending Balance | 521,486 |  | 444,280 |  | 521,486 | 444,280 | 419,280 |
Retained Earnings |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Beginning Balance |  | 3,437,093 |  | 3,190,578 | 3,437,093 | 3,190,578 | 2,922,620 |
Net income |  |  |  |  | 664,505 | 504,893 | 513,384 |
Dividends declared, $1.88 in 2018, $1.81 in 2017, and $1.74 in 2016 per share |  |  |  |  | (265,244) | (258,378) | (245,426) |
Ending Balance | 3,845,593 |  | 3,437,093 |  | 3,845,593 | 3,437,093 | 3,190,578 |
Accumulated Other Comprehensive Loss |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Beginning Balance |  | (18,460) |  | (61,442) | (18,460) | (61,442) | (37,946) |
Foreign currency translation |  |  |  |  | (53,475) | 42,982 | (23,496) |
Ending Balance | (71,935) |  | (18,460) |  | (71,935) | (18,460) | (61,442) |
Treasury Stock |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Beginning Balance |  | (2,451,122) |  | $ (2,304,695) | (2,451,122) | (2,304,695) | (2,128,013) |
Stock issued for employee benefit plans |  |  |  |  | 40,489 | 33,271 | (1,287) |
Stock-based compensation expense |  |  |  |  | 8 | 44 | 1,034 |
Repurchase of common stock |  |  |  |  | (303,160) | (179,742) | (176,429) |
Ending Balance | (2,713,785) |  | $ (2,451,122) |  | $ (2,713,785) | $ (2,451,122) | $ (2,304,695) |
ASU No. 2014-09 |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Net income | $ (4,200) | $ 2,100 |  |  |  |  |  |
ASU No. 2014-09 | Retained Earnings |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Cumulative Effect Change - ASU 2014-09 |  |  |  |  |  |  |  | $ 9,239

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