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CONDENSED CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) shares in Thousands, $ in Thousands | Total | Common Stock | Additional Paid-in Capital | Accumulated Other Comprehensive Income (Loss) | Retained Earnings
--- | --- | --- | --- | --- | ---
Balance at Jan. 01, 2018 | $ 1,953,646 | $ 24,444 | $ 1,638,413 | $ 18,776 | $ 272,013
Balance, Shares at Jan. 01, 2018 |  | 195,548 |  |  |
Net issuance of common stock under stock-based plans | (8,086) | $ 157 | (8,243) |  |
Net issuance of common stock under stock-based plans (in shares) |  | 1,253 |  |  |
Stock-based compensation expense | 15,509 |  | 15,509 |  |
Repurchase of common stock | (367,191) | $ (1,106) |  |  | (366,085)
Repurchase of common stock (in shares) |  | (8,839) |  |  |
Cash dividends | (34,703) |  |  |  | (34,703)
Net income | 188,010 |  |  |  | 188,010
Other comprehensive Income (loss) | (19,924) |  |  | (19,924) |
Reclassification of unrealized gains on equity securities |  |  |  | (3,125) | 3,125
Reclassification of tax effects resulting from the Tax Reform Act |  |  |  | 769 | (769)
Balance at Jul. 01, 2018 | 1,739,940 | $ 23,495 | 1,645,679 | (3,504) | 74,270
Balance, Shares at Jul. 01, 2018 |  | 187,962 |  |  |
Balance at Apr. 01, 2018 | 1,904,983 | $ 24,226 | 1,638,756 | 25,881 | 216,120
Balance, Shares at Apr. 01, 2018 |  | 193,808 |  |  |
Net issuance of common stock under stock-based plans | (107) | $ 7 | (114) |  |
Net issuance of common stock under stock-based plans (in shares) |  | 54 |  |  |
Stock-based compensation expense | 7,037 |  | 7,037 |  |
Repurchase of common stock | (226,520) | $ (738) |  |  | (225,782)
Repurchase of common stock (in shares) |  | (5,900) |  |  |
Cash dividends | (17,105) |  |  |  | (17,105)
Net income | 101,037 |  |  |  | 101,037
Other comprehensive Income (loss) | (29,385) |  |  | (29,385) |
Reclassification of tax effects resulting from the Tax Reform Act |  |  |  | 260 |
Balance at Jul. 01, 2018 | 1,739,940 | $ 23,495 | 1,645,679 | (3,504) | 74,270
Balance, Shares at Jul. 01, 2018 |  | 187,962 |  |  |
Cumulative effect of changes in accounting principle related to revenue recognition | 12,679 |  |  |  | 12,679
Balance at Dec. 31, 2018 | 1,522,354 | $ 21,940 | 1,671,645 | (13,040) | (158,191)
Balance, Shares at Dec. 31, 2018 |  | 175,522 |  |  |
Net issuance of common stock under stock-based plans | 643 | $ 174 | 469 |  |
Net issuance of common stock under stock-based plans (in shares) |  | 1,385 |  |  |
Stock-based compensation expense | 16,097 |  | 16,097 |  |
Repurchase of common stock | (240,624) | $ (809) |  |  | (239,815)
Repurchase of common stock (in shares) |  | (6,471) |  |  |
Cash dividends | (31,042) |  |  |  | (31,042)
Net income | 206,535 |  |  |  | 206,535
Other comprehensive Income (loss) | 5,449 |  |  | 5,449 |
Reclassification of tax effects resulting from the Tax Reform Act |  |  |  | 171 |
Balance at Jun. 30, 2019 | 1,479,412 | $ 21,305 | 1,688,211 | (7,591) | (222,513)
Balance, Shares at Jun. 30, 2019 |  | 170,436 |  |  |
Balance at Mar. 31, 2019 | 1,470,228 | $ 21,544 | 1,679,997 | (15,706) | (215,607)
Balance, Shares at Mar. 31, 2019 |  | 172,353 |  |  |
Net issuance of common stock under stock-based plans | 692 | $ 13 | 679 |  |
Net issuance of common stock under stock-based plans (in shares) |  | 99 |  |  |
Stock-based compensation expense | 7,535 |  | 7,535 |  |
Repurchase of common stock | (89,154) | $ (252) |  |  | (88,902)
Repurchase of common stock (in shares) |  | (2,016) |  |  |
Cash dividends | (15,401) |  |  |  | (15,401)
Net income | 97,397 |  |  |  | 97,397
Other comprehensive Income (loss) | 8,115 |  |  | 8,115 |
Reclassification of tax effects resulting from the Tax Reform Act |  |  |  | 64 |
Balance at Jun. 30, 2019 | $ 1,479,412 | $ 21,305 | $ 1,688,211 | $ (7,591) | $ (222,513)
Balance, Shares at Jun. 30, 2019 |  | 170,436 |  |  |

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