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v3.10.0.1

Consolidated Statements of Changes in Equity - USD ($) shares in Thousands, $ in Thousands | Total | Common Stock | Capital In Excess of Par Value | Retained Earnings | Accumulated Other Comprehensive Loss
--- | --- | --- | --- | --- | ---
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Cumulative effect upon adoption of ASUs |  |  | $ 0 |  |
Cumulative effect upon adoption of ASUs | Accounting Standards Update 2014-09 |  |  |  | $ 0 |
Cumulative effect upon adoption of ASUs | Accounting Standards Update 2016-09 |  |  |  | 0 |
Beginning balance at Dec. 31, 2015 |  | $ 1,637 | 910,513 | 402,860 | $ (25,290)
Beginning balance, shares at Dec. 31, 2015 |  | 163,733 |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Purchase and retirement of common stock |  | $ (66) | (28,306) | (266,002) |
Purchase and retirement of common stock, shares |  | (6,600) |  |  |
Issuance of common stock under the employee stock purchase plan |  | $ 1 | 3,357 |  |
Issuance of common stock under the employee stock purchase plan, shares |  | 88 |  |  |
Issuance of common stock upon exercise of stock options |  | $ 18 | 44,896 |  |
Issuance of common stock upon exercise of stock options, shares | 1,809 | 1,810 |  |  |
Stock-based compensation | $ (16,017) |  | 16,017 |  |
Tax benefit on stock options exercised |  |  | 8,984 |  |
Net income | 333,817 |  |  | 333,817 |
Dividends declared ($0.63, $0.58 and $0.54 per share) | (86,657) |  |  | (86,657) |
Other comprehensive (loss) gain | (12,665) |  |  |  | (12,665)
Ending balance at Dec. 31, 2016 | $ 1,303,114 | $ 1,590 | 955,461 | 384,018 | (37,955)
Ending balance, shares at Dec. 31, 2016 |  | 159,031 |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Cumulative effect upon adoption of ASUs |  |  | 2,582 |  |
Cumulative effect upon adoption of ASUs | Accounting Standards Update 2014-09 |  |  |  | 0 |
Cumulative effect upon adoption of ASUs | Accounting Standards Update 2016-09 |  |  |  | (1,669) |
Purchase and retirement of common stock |  | $ (44) | (20,243) | (227,827) |
Purchase and retirement of common stock, shares |  | (4,403) |  |  |
Issuance of common stock under the employee stock purchase plan |  | $ 1 | 3,280 |  |
Issuance of common stock under the employee stock purchase plan, shares |  | 71 |  |  |
Issuance of common stock upon exercise of stock options |  | $ 24 | 50,263 |  |
Issuance of common stock upon exercise of stock options, shares | 2,370 | 2,370 |  |  |
Stock-based compensation | $ (36,366) |  | 36,366 |  |
Tax benefit on stock options exercised |  |  | 0 |  |
Net income | 404,389 |  |  | 404,389 |
Dividends declared ($0.63, $0.58 and $0.54 per share) | (91,444) |  |  | (91,444) |
Other comprehensive (loss) gain | 18,047 |  |  |  | 18,047
Ending balance at Dec. 31, 2017 | $ 1,476,839 | $ 1,571 | 1,027,709 | 467,467 | (19,908)
Ending balance, shares at Dec. 31, 2017 | 157,069 | 157,069 |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Cumulative effect upon adoption of ASUs |  |  | 0 |  |
Cumulative effect upon adoption of ASUs | Accounting Standards Update 2014-09 |  |  |  | 14,402 |
Cumulative effect upon adoption of ASUs | Accounting Standards Update 2016-09 |  |  |  | 0 |
Purchase and retirement of common stock |  | $ (67) | (32,823) | (371,867) |
Purchase and retirement of common stock, shares |  | (6,744) |  |  |
Issuance of common stock under the employee stock purchase plan |  | $ 0 | 4,170 |  |
Issuance of common stock under the employee stock purchase plan, shares |  | 77 |  |  |
Issuance of common stock upon exercise of stock options |  | $ 32 | 83,780 |  |
Issuance of common stock upon exercise of stock options, shares | 3,232 | 3,232 |  |  |
Stock-based compensation | $ (23,805) |  | 23,805 |  |
Tax benefit on stock options exercised |  |  | 0 |  |
Net income | 505,868 |  |  | 505,868 |
Dividends declared ($0.63, $0.58 and $0.54 per share) | (97,900) |  |  | (97,900) |
Other comprehensive (loss) gain | (13,092) |  |  |  | (13,092)
Ending balance at Dec. 31, 2018 | $ 1,593,147 | $ 1,536 | $ 1,106,641 | $ 517,970 | $ (33,000)
Ending balance, shares at Dec. 31, 2018 | 153,634 | 153,634 |  |  |

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