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v3.20.2

Condensed Consolidated Statements Of Shareholders' Equity - USD ($) shares in Thousands, $ in Thousands | Common Stock [Member] Revision of Prior Period, Accounting Standards Update, Adjustment [Member] | Common Stock [Member] | Additional Paid-In Capital [Member] Revision of Prior Period, Accounting Standards Update, Adjustment [Member] | Additional Paid-In Capital [Member] | Treasury Stock [Member] Revision of Prior Period, Accounting Standards Update, Adjustment [Member] | Treasury Stock [Member] | Retained Earnings [Member] Revision of Prior Period, Accounting Standards Update, Adjustment [Member] | Retained Earnings [Member] | Available-For-Sale Securities [Member] Revision of Prior Period, Accounting Standards Update, Adjustment [Member] | Available-For-Sale Securities [Member] | Foreign Currency Translation [Member] Revision of Prior Period, Accounting Standards Update, Adjustment [Member] | Foreign Currency Translation [Member] | Revision of Prior Period, Accounting Standards Update, Adjustment [Member] | Total
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Balance (Accounting Standards Update 2016-02 [Member]) at Dec. 31, 2018 | $ 0 |  | $ 0 |  | $ 0 |  | $ (2,327) |  | $ 0 |  | $ 0 |  | $ (2,327) |
Balance at Dec. 31, 2018 |  | $ 360 |  | $ 1,374,154 |  | $ (2,500,556) |  | $ 2,573,617 |  | $ (147) |  | $ (6,089) |  | $ 1,441,339
Balance, Shares at Dec. 31, 2018 |  | 35,973 |  |  |  | 8,276 |  |  |  |  |  |  |  |
Stock-based compensation |  | $ 0 |  | 19,342 |  | $ 0 |  | 0 |  | 0 |  | 0 |  | 19,342
Stock-based compensation, Shares |  | 0 |  |  |  | 0 |  |  |  |  |  |  |  |
Stock plan transactions and other |  | $ 1 |  | (212) |  | $ 0 |  | 0 |  | 0 |  | 0 |  | (211)
Stock plan transactions and other, Shares |  | 135 |  |  |  | 0 |  |  |  |  |  |  |  |
Acquisition of treasury stock (value) |  | $ 0 |  | 0 |  | $ (62,854) |  | 0 |  | 0 |  | 0 |  | (62,854)
Acquisition of treasury stock (shares) |  | 0 |  |  |  | 110 |  |  |  |  |  |  |  |
Net income |  | $ 0 |  | 0 |  | $ 0 |  | 88,132 |  | 0 |  | 0 |  | 88,132
Other comprehensive income (loss), net of income tax |  | 0 |  | 0 |  | 0 |  | 0 |  | 100 |  | 278 |  | 378
Balance at Mar. 31, 2019 |  | $ 361 |  | 1,393,284 |  | $ (2,563,410) |  | 2,659,422 |  | (47) |  | (5,811) |  | 1,483,799
Balance, Shares at Mar. 31, 2019 |  | 36,108 |  |  |  | 8,386 |  |  |  |  |  |  |  |
Balance (Accounting Standards Update 2016-02 [Member]) at Dec. 31, 2018 | 0 |  | 0 |  | 0 |  | (2,327) |  | 0 |  | 0 |  | (2,327) |
Balance at Dec. 31, 2018 |  | $ 360 |  | 1,374,154 |  | $ (2,500,556) |  | 2,573,617 |  | (147) |  | (6,089) |  | 1,441,339
Balance, Shares at Dec. 31, 2018 |  | 35,973 |  |  |  | 8,276 |  |  |  |  |  |  |  |
Net income |  |  |  |  |  |  |  |  |  |  |  |  |  | 277,742
Other comprehensive income (loss), net of income tax |  |  |  |  |  |  |  |  |  |  |  |  |  | 349
Balance at Sep. 30, 2019 |  | $ 363 |  | 1,439,811 |  | $ (2,660,872) |  | 2,849,032 |  | 0 |  | (5,887) |  | 1,622,447
Balance, Shares at Sep. 30, 2019 |  | 36,320 |  |  |  | 8,519 |  |  |  |  |  |  |  |
Balance at Mar. 31, 2019 |  | $ 361 |  | 1,393,284 |  | $ (2,563,410) |  | 2,659,422 |  | (47) |  | (5,811) |  | 1,483,799
Balance, Shares at Mar. 31, 2019 |  | 36,108 |  |  |  | 8,386 |  |  |  |  |  |  |  |
Stock-based compensation |  | $ 0 |  | 21,322 |  | $ 0 |  | 0 |  | 0 |  | 0 |  | 21,322
Stock-based compensation, Shares |  | 0 |  |  |  |  |  |  |  |  |  |  |  |
Stock plan transactions and other |  | $ 1 |  | (186) |  | 0 |  | 0 |  | 0 |  | 0 |  | (185)
Stock plan transactions and other, Shares |  | 85 |  |  |  |  |  |  |  |  |  |  |  |
Acquisition of treasury stock (value) |  | $ 0 |  | 0 |  | $ (58,512) |  | 0 |  | 0 |  | 0 |  | (58,512)
Acquisition of treasury stock (shares) |  | 0 |  |  |  | 83 |  |  |  |  |  |  |  |
Net income |  | $ 0 |  | 0 |  | $ 0 |  | 91,028 |  | 0 |  | 0 |  | 91,028
Other comprehensive income (loss), net of income tax |  | 0 |  | 0 |  | 0 |  | 0 |  | 42 |  | 555 |  | 597
Balance at Jun. 30, 2019 |  | $ 362 |  | 1,414,420 |  | $ (2,621,922) |  | 2,750,450 |  | (5) |  | (5,256) |  | 1,538,049
Balance, Shares at Jun. 30, 2019 |  | 36,193 |  |  |  | 8,469 |  |  |  |  |  |  |  |
Stock-based compensation |  | $ 0 |  | 25,506 |  | $ 0 |  | 0 |  | 0 |  | 0 |  | 25,506
Stock plan transactions and other |  | $ 1 |  | (115) |  | $ 0 |  | 0 |  | 0 |  | 0 |  | (114)
Stock plan transactions and other, Shares |  | 127 |  |  |  | 0 |  |  |  |  |  |  |  |
Acquisition of treasury stock (value) |  | $ 0 |  | 0 |  | $ (38,950) |  | 0 |  | 0 |  | 0 |  | (38,950)
Acquisition of treasury stock (shares) |  | 0 |  |  |  | 50 |  |  |  |  |  |  |  |
Net income |  | $ 0 |  | 0 |  | $ 0 |  | 98,582 |  | 0 |  | 0 |  | 98,582
Other comprehensive income (loss), net of income tax |  | 0 |  | 0 |  | 0 |  | 0 |  | 5 |  | (631) |  | (626)
Balance at Sep. 30, 2019 |  | $ 363 |  | 1,439,811 |  | $ (2,660,872) |  | 2,849,032 |  | 0 |  | (5,887) |  | 1,622,447
Balance, Shares at Sep. 30, 2019 |  | 36,320 |  |  |  | 8,519 |  |  |  |  |  |  |  |
Balance (Accounting Standards Update 2016-13 [Member]) at Dec. 31, 2019 | 0 |  | 0 |  | 0 |  | (1,051) |  | 0 |  | 0 |  | (1,051) |
Balance at Dec. 31, 2019 |  | $ 363 |  | 1,465,697 |  | $ (2,699,119) |  | 2,921,448 |  | 0 |  | (5,363) |  | 1,683,026
Balance, Shares at Dec. 31, 2019 |  | 36,323 |  |  |  | 8,568 |  |  |  |  |  |  |  |
Stock-based compensation |  | $ 0 |  | 17,708 |  | $ 0 |  | 0 |  | 0 |  | 0 |  | 17,708
Stock-based compensation, Shares |  | 0 |  |  |  | 0 |  |  |  |  |  |  |  |
Stock plan transactions and other |  | $ 2 |  | (181) |  | $ 0 |  | 0 |  | 0 |  | 0 |  | (179)
Stock plan transactions and other, Shares |  | 194 |  |  |  | 0 |  |  |  |  |  |  |  |
Acquisition of treasury stock (value) |  | $ 0 |  | 0 |  | $ (102,031) |  | 0 |  | 0 |  | 0 |  | (102,031)
Acquisition of treasury stock (shares) |  | 0 |  |  |  | 134 |  |  |  |  |  |  |  |
Net income |  | $ 0 |  | 0 |  | $ 0 |  | 76,388 |  | 0 |  | 0 |  | 76,388
Other comprehensive income (loss), net of income tax |  | 0 |  | 0 |  | 0 |  | 0 |  | 0 |  | (1,841) |  | (1,841)
Balance at Mar. 31, 2020 |  | $ 365 |  | 1,483,224 |  | $ (2,801,150) |  | 2,996,785 |  | 0 |  | (7,204) |  | 1,672,020
Balance, Shares at Mar. 31, 2020 |  | 36,517 |  |  |  | 8,702 |  |  |  |  |  |  |  |
Balance (Accounting Standards Update 2016-13 [Member]) at Dec. 31, 2019 | $ 0 |  | $ 0 |  | $ 0 |  | $ (1,051) |  | $ 0 |  | $ 0 |  | $ (1,051) |
Balance at Dec. 31, 2019 |  | $ 363 |  | 1,465,697 |  | $ (2,699,119) |  | 2,921,448 |  | 0 |  | (5,363) |  | 1,683,026
Balance, Shares at Dec. 31, 2019 |  | 36,323 |  |  |  | 8,568 |  |  |  |  |  |  |  |
Net income |  |  |  |  |  |  |  |  |  |  |  |  |  | 164,807
Other comprehensive income (loss), net of income tax |  |  |  |  |  |  |  |  |  |  |  |  |  | (81)
Balance at Sep. 30, 2020 |  | $ 367 |  | 1,526,955 |  | $ (2,801,496) |  | 3,085,204 |  | 0 |  | (5,444) |  | 1,805,586
Balance, Shares at Sep. 30, 2020 |  | 36,682 |  |  |  | 8,703 |  |  |  |  |  |  |  |
Balance at Mar. 31, 2020 |  | $ 365 |  | 1,483,224 |  | $ (2,801,150) |  | 2,996,785 |  | 0 |  | (7,204) |  | 1,672,020
Balance, Shares at Mar. 31, 2020 |  | 36,517 |  |  |  | 8,702 |  |  |  |  |  |  |  |
Stock-based compensation |  | $ 0 |  | 23,676 |  | $ 0 |  | 0 |  | 0 |  | 0 |  | 23,676
Stock-based compensation, Shares |  | 0 |  |  |  |  |  |  |  |  |  |  |  |
Stock plan transactions and other |  | $ 2 |  | (115) |  | 0 |  | 0 |  | 0 |  | 0 |  | (113)
Stock plan transactions and other, Shares |  | 150 |  |  |  |  |  |  |  |  |  |  |  |
Acquisition of treasury stock (value) |  | $ 0 |  | 0 |  | $ (317) |  | 0 |  | 0 |  | 0 |  | (317)
Acquisition of treasury stock (shares) |  | 0 |  |  |  | 1 |  |  |  |  |  |  |  |
Net income |  | $ 0 |  | 0 |  | $ 0 |  | 8,175 |  | 0 |  | 0 |  | 8,175
Other comprehensive income (loss), net of income tax |  | 0 |  | 0 |  | 0 |  | 0 |  | 0 |  | 1,055 |  | 1,055
Balance at Jun. 30, 2020 |  | $ 367 |  | 1,506,785 |  | $ (2,801,467) |  | 3,004,960 |  | 0 |  | (6,149) |  | 1,704,496
Balance, Shares at Jun. 30, 2020 |  | 36,667 |  |  |  | 8,703 |  |  |  |  |  |  |  |
Stock-based compensation |  | $ 0 |  | 20,128 |  | $ 0 |  | 0 |  | 0 |  | 0 |  | 20,128
Stock-based compensation, Shares |  | 0 |  |  |  | 0 |  |  |  |  |  |  |  |
Stock plan transactions and other |  | $ 0 |  | 42 |  | $ 0 |  | 0 |  | 0 |  | 0 |  | 42
Stock plan transactions and other, Shares |  | 15 |  |  |  | 0 |  |  |  |  |  |  |  |
Acquisition of treasury stock (value) |  | $ 0 |  | 0 |  | $ (29) |  | 0 |  | 0 |  | 0 |  | (29)
Acquisition of treasury stock (shares) |  | 0 |  |  |  | 0 |  |  |  |  |  |  |  |
Net income |  | $ 0 |  | 0 |  | $ 0 |  | 80,244 |  | 0 |  | 0 |  | 80,244
Other comprehensive income (loss), net of income tax |  | 0 |  | 0 |  | 0 |  | 0 |  | 0 |  | 705 |  | 705
Balance at Sep. 30, 2020 |  | $ 367 |  | $ 1,526,955 |  | $ (2,801,496) |  | $ 3,085,204 |  | $ 0 |  | $ (5,444) |  | $ 1,805,586
Balance, Shares at Sep. 30, 2020 |  | 36,682 |  |  |  | 8,703 |  |  |  |  |  |  |  |

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