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v3.8.0.1

Consolidated Statements of Shareholders' Equity - USD ($) $ in Thousands | Total | Common stock [Member] | Additional paid-in capital [Member] | Retained earnings (deficit) [Member]
--- | --- | --- | --- | ---
Balance at Dec. 31, 2014 | $ 2,018,418 | $ 1,016 | $ 1,194,929 | $ 822,473
Balance (in shares) at Dec. 31, 2014 |  | 101,603,000 |  |
Net income | 931,216 |  |  | 931,216
Issuance of common stock under employee benefit plans, net of forfeitures and shares withheld to cover taxes | 11,630 |  | 11,630 |
Issuance of common stock under employee benefit plans, net of forfeitures and shares withheld to cover taxes, shares |  | 59,000 |  |
Net issuance of common stock upon exercise of stock options | 52,911 | $ 10 | 52,901 |
Net issuance of common stock upon exercise of stock options, shares |  | 976,000 |  |
Excess tax benefit from share-based compensation | 63,078 |  | 63,078 |
Share based compensation | 20,274 |  | 20,274 |
Share repurchases, including fees | (1,136,213) | $ (49) | (61,315) | (1,074,849)
Share repurchases, shares |  | (4,901,000) |  |
Balance at Dec. 31, 2015 | 1,961,314 | $ 977 | 1,281,497 | 678,840
Balance (in shares) at Dec. 31, 2015 |  | 97,737,000 |  |
Net income | 1,037,691 |  |  | 1,037,691
Issuance of common stock under employee benefit plans, net of forfeitures and shares withheld to cover taxes | 12,614 | $ 1 | 12,613 |
Issuance of common stock under employee benefit plans, net of forfeitures and shares withheld to cover taxes, shares |  | 56,000 |  |
Net issuance of common stock upon exercise of stock options | 47,394 | $ 8 | 47,386 |
Net issuance of common stock upon exercise of stock options, shares |  | 757,000 |  |
Excess tax benefit from share-based compensation | 55,994 |  | 55,994 |
Share based compensation | 17,566 |  | 17,566 |
Share repurchases, including fees | $ (1,505,437) | $ (57) | (78,349) | (1,427,031)
Share repurchases, shares | (5,698,000) | (5,698,000) |  |
Balance at Dec. 31, 2016 | $ 1,627,136 | $ 929 | 1,336,707 | 289,500
Balance (in shares) at Dec. 31, 2016 | 92,851,815 | 92,852,000 |  |
Cumulative effective adjustment from adoption of ASU 2016-09 | Adoption of ASU 2016-09 [Member] | $ 168 |  | 434 | (266)
Net income | 1,133,804 |  |  | 1,133,804
Issuance of common stock under employee benefit plans, net of forfeitures and shares withheld to cover taxes | 13,466 |  | 13,466 |
Issuance of common stock under employee benefit plans, net of forfeitures and shares withheld to cover taxes, shares |  | 66,000 |  |
Net issuance of common stock upon exercise of stock options | 33,229 | $ 7 | 33,222 |
Net issuance of common stock upon exercise of stock options, shares |  | 685,000 |  |
Share based compensation | 17,773 |  | 17,773 |
Share repurchases, including fees | $ (2,172,530) | $ (93) | (136,559) | (2,035,878)
Share repurchases, shares | (9,301,000) | (9,301,000) |  |
Balance at Dec. 31, 2017 | $ 653,046 | $ 843 | $ 1,265,043 | $ (612,840)
Balance (in shares) at Dec. 31, 2017 | 84,302,187 | 84,302,000 |  |

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