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CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (DEFICIT) - USD ($) shares in Thousands, $ in Thousands | Total | Common Stock | Additional Paid-in Capital | Deferred Stock Units | Retained Earnings | Accumulated Other Comprehensive Loss | Treasury Stock | Noncontrolling Interest
--- | --- | --- | --- | --- | --- | --- | --- | ---
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Cumulative effect of accounting changes | $ (12,648) |  |  |  | $ (12,648) |  |  |
Beginning balance, adjusted | (66,490) | $ 10,428 | $ 1,073,931 | $ 5,988 | 790,897 | $ (36,470) | $ (1,911,528) | $ 264
Balance beginning of period (in shares) at Dec. 31, 2017 |  | 104,275 |  |  |  |  |  |
Balance beginning of period at Dec. 31, 2017 | (53,842) | $ 10,428 | 1,073,931 | 5,988 | 803,545 | (36,470) | (1,911,528) | 264
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Net income (loss) | 89,476 |  |  |  | 89,451 |  |  | 25
Other comprehensive income (loss), net | 2,264 |  |  |  |  | 2,264 |  |
Repurchases of common stock, net | (94,285) |  |  |  |  |  | (94,285) |
Common stock issued under stock plans (in shares) |  | 401 |  |  |  |  |  |
Common stock issued under stock plans | 14,092 | $ 40 | 14,311 | (259) |  |  |  |
Share-based compensation cost | 5,960 |  | 5,917 | 43 |  |  |  |
Balance end of period (in shares) at Mar. 31, 2018 |  | 104,676 |  |  |  |  |  |
Balance end of period at Mar. 31, 2018 | (48,983) | $ 10,468 | 1,094,159 | 5,772 | 880,348 | (34,206) | (2,005,813) | 289
Balance beginning of period (in shares) at Dec. 31, 2017 |  | 104,275 |  |  |  |  |  |
Balance beginning of period at Dec. 31, 2017 | (53,842) | $ 10,428 | 1,073,931 | 5,988 | 803,545 | (36,470) | (1,911,528) | 264
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Net income (loss) | 291,370 |  |  |  |  |  |  |
Other comprehensive income (loss), net | (5,717) |  |  |  |  |  |  |
Balance end of period (in shares) at Sep. 30, 2018 |  | 105,042 |  |  |  |  |  |
Balance end of period at Sep. 30, 2018 | (1,365) | $ 10,504 | 1,128,484 | 4,455 | 1,082,290 | (42,187) | (2,185,152) | 241
Balance beginning of period (in shares) at Mar. 31, 2018 |  | 104,676 |  |  |  |  |  |
Balance beginning of period at Mar. 31, 2018 | (48,983) | $ 10,468 | 1,094,159 | 5,772 | 880,348 | (34,206) | (2,005,813) | 289
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Net income (loss) | 108,680 |  |  |  | 108,691 |  |  | (11)
Other comprehensive income (loss), net | (8,353) |  |  |  |  | (8,353) |  |
Repurchases of common stock, net | (105,834) |  |  |  |  |  | (105,834) |
Common stock issued under stock plans (in shares) |  | 171 |  |  |  |  |  |
Common stock issued under stock plans | 7,249 | $ 17 | 9,053 | (1,821) |  |  |  |
Deferred stock units activity | 0 |  | (385) | 385 |  |  |  |
Share-based compensation cost | 6,392 |  | 6,330 | 62 |  |  |  |
Balance end of period (in shares) at Jun. 30, 2018 |  | 104,847 |  |  |  |  |  |
Balance end of period at Jun. 30, 2018 | (40,849) | $ 10,485 | 1,109,157 | 4,398 | 989,039 | (42,559) | (2,111,647) | 278
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Net income (loss) | 93,214 |  |  |  | 93,251 |  |  | (37)
Other comprehensive income (loss), net | 372 |  |  |  |  | 372 |  |
Repurchases of common stock, net | (73,505) |  |  |  |  |  | (73,505) |
Common stock issued under stock plans (in shares) |  | 195 |  |  |  |  |  |
Common stock issued under stock plans | 12,807 | $ 19 | 12,800 | (12) |  |  |  |
Share-based compensation cost | 6,596 |  | 6,527 | 69 |  |  |  |
Balance end of period (in shares) at Sep. 30, 2018 |  | 105,042 |  |  |  |  |  |
Balance end of period at Sep. 30, 2018 | $ (1,365) | $ 10,504 | 1,128,484 | 4,455 | 1,082,290 | (42,187) | (2,185,152) | 241
Balance beginning of period (in shares) at Dec. 31, 2018 | 105,087 | 105,087 |  |  |  |  |  |
Balance beginning of period at Dec. 31, 2018 | $ (9,233) | $ 10,509 | 1,138,216 | 4,524 | 1,167,928 | (41,791) | (2,288,899) | 280
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Net income (loss) | 102,709 |  |  |  | 102,681 |  |  | 28
Other comprehensive income (loss), net | 1,776 |  |  |  |  | 1,776 |  |
Repurchases of common stock, net | (61,135) |  |  |  |  |  | (61,135) |
Common stock issued under stock plans (in shares) |  | 258 |  |  |  |  |  |
Common stock issued under stock plans | 11,419 | $ 26 | 11,393 |  |  |  |  |
Share-based compensation cost | 6,334 |  | 6,266 | 68 |  |  |  |
Balance end of period (in shares) at Mar. 31, 2019 |  | 105,345 |  |  |  |  |  |
Balance end of period at Mar. 31, 2019 | $ 51,870 | $ 10,535 | 1,155,875 | 4,592 | 1,270,609 | (40,015) | (2,350,034) | 308
Balance beginning of period (in shares) at Dec. 31, 2018 | 105,087 | 105,087 |  |  |  |  |  |
Balance beginning of period at Dec. 31, 2018 | $ (9,233) | $ 10,509 | 1,138,216 | 4,524 | 1,167,928 | (41,791) | (2,288,899) | 280
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Net income (loss) | 337,248 |  |  |  |  |  |  |
Other comprehensive income (loss), net | $ (3,774) |  |  |  |  |  |  |
Balance end of period (in shares) at Sep. 30, 2019 | 105,594 | 105,594 |  |  |  |  |  |
Balance end of period at Sep. 30, 2019 | $ 202,722 | $ 10,559 | 1,189,554 | 4,416 | 1,505,152 | (45,565) | (2,461,698) | 304
Balance beginning of period (in shares) at Mar. 31, 2019 |  | 105,345 |  |  |  |  |  |
Balance beginning of period at Mar. 31, 2019 | 51,870 | $ 10,535 | 1,155,875 | 4,592 | 1,270,609 | (40,015) | (2,350,034) | 308
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Net income (loss) | 125,701 |  |  |  | 125,706 |  |  | (5)
Other comprehensive income (loss), net | (568) |  |  |  |  | (568) |  |
Repurchases of common stock, net | (20,343) |  |  |  |  |  | (20,343) |
Common stock issued under stock plans (in shares) |  | 133 |  |  |  |  |  |
Common stock issued under stock plans | 7,991 | $ 13 | 8,556 | (578) |  |  |  |
Deferred stock units activity | 0 |  | (324) | 324 |  |  |  |
Share-based compensation cost | 6,898 |  | 6,855 | 43 |  |  |  |
Balance end of period (in shares) at Jun. 30, 2019 |  | 105,478 |  |  |  |  |  |
Balance end of period at Jun. 30, 2019 | 171,549 | $ 10,548 | 1,170,962 | 4,381 | 1,396,315 | (40,583) | (2,370,377) | 303
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Net income (loss) | 108,838 |  |  |  | 108,837 |  |  | 1
Other comprehensive income (loss), net | (4,982) |  |  |  |  | (4,982) |  |
Repurchases of common stock, net | (91,321) |  |  |  |  |  | (91,321) |
Common stock issued under stock plans (in shares) |  | 116 |  |  |  |  |  |
Common stock issued under stock plans | 9,247 | $ 11 | 9,247 | (11) |  |  |  |
Share-based compensation cost | $ 9,391 |  | 9,345 | 46 |  |  |  |
Balance end of period (in shares) at Sep. 30, 2019 | 105,594 | 105,594 |  |  |  |  |  |
Balance end of period at Sep. 30, 2019 | $ 202,722 | $ 10,559 | $ 1,189,554 | $ 4,416 | $ 1,505,152 | $ (45,565) | $ (2,461,698) | $ 304

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