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Condensed Consolidated Statements Of Shareholders' Equity - USD ($)
shares in Thousands, $ in Thousands
Common Stock [Member]
Additional Paid-In Capital [Member]
Treasury Stock [Member]
Retained Earnings [Member]
Accumulated Other Comprehensive Income (Loss) [Member]
Total
Balance at Dec. 31, 2020 $ 367 $ 1,549,909 $ (2,802,075) $ 3,276,163 $ (4,229) $ 2,020,135
Balance, Shares at Dec. 31, 2020 36,704   8,703      
Stock-based compensation $ 0 55,960 $ 0 0 0 55,960
Stock-based compensation, Shares 0   0      
Stock plan transactions and other $ 2 632 $ 0 0 0 634
Stock plan transactions and other, Shares 232   0      
Acquisition of treasury stock $ 0 0 $ (106,036) 0 0 (106,036)
Acquisition of treasury stock, Shares 0   74      
Net income $ 0 0 $ 0 127,101 0 127,101
Other comprehensive income (loss), net of income tax 0 0 0 0 (263) (263)
Balance at Mar. 31, 2021 $ 369 1,606,501 $ (2,908,111) 3,403,264 (4,492) 2,097,531
Balance, Shares at Mar. 31, 2021 36,936   8,777      
Balance at Dec. 31, 2020 $ 367 1,549,909 $ (2,802,075) 3,276,163 (4,229) 2,020,135
Balance, Shares at Dec. 31, 2020 36,704   8,703      
Net income           519,509
Balance at Sep. 30, 2021 $ 371 1,690,806 $ (3,170,798) 3,795,672 (5,143) 2,310,908
Balance, Shares at Sep. 30, 2021 37,102   8,947      
Balance at Mar. 31, 2021 $ 369 1,606,501 $ (2,908,111) 3,403,264 (4,492) 2,097,531
Balance, Shares at Mar. 31, 2021 36,936   8,777      
Stock-based compensation $ 0 47,670 $ 0 0 0 47,670
Stock-based compensation, Shares 0   0      
Stock plan transactions and other $ 1 24 $ 0 0 0 25
Stock plan transactions and other, Shares 52   0      
Acquisition of treasury stock $ 0 0 $ (159,347) 0 0 (159,347)
Acquisition of treasury stock, Shares 0   113      
Net income $ 0 0 $ 0 187,974 0 187,974
Other comprehensive income (loss), net of income tax 0 0 0 0 305 305
Balance at Jun. 30, 2021 $ 370 1,654,195 $ (3,067,458) 3,591,238 (4,187) 2,174,158
Balance, Shares at Jun. 30, 2021 36,988   8,890      
Stock-based compensation $ 0 36,693 $ 0 0 0 36,693
Stock-based compensation, Shares 0   0      
Stock plan transactions and other $ 1 (82) $ 0 0 0 (81)
Stock plan transactions and other, Shares 114   0      
Acquisition of treasury stock $ 0 0 $ (103,340) 0 0 (103,340)
Acquisition of treasury stock, Shares 0   57      
Net income $ 0 0 $ 0 204,434 0 204,434
Other comprehensive income (loss), net of income tax 0 0 0 0 (956) (956)
Balance at Sep. 30, 2021 $ 371 1,690,806 $ (3,170,798) 3,795,672 (5,143) 2,310,908
Balance, Shares at Sep. 30, 2021 37,102   8,947      
Balance at Dec. 31, 2021 $ 371 1,729,312 $ (3,356,102) 3,929,147 (5,354) 2,297,374
Balance, Shares at Dec. 31, 2021 37,132   9,052      
Stock-based compensation $ 0 24,077 $ 0 0 0 24,077
Stock-based compensation, Shares 0   0      
Stock plan transactions and other $ 2 (61) $ 0 0 0 (59)
Stock plan transactions and other, Shares 134   0      
Acquisition of treasury stock $ 0 0 $ (345,921) 0 0 (345,921)
Acquisition of treasury stock, Shares 0   230      
Net income $ 0 0 $ 0 158,294 0 158,294
Other comprehensive income (loss), net of income tax 0 0 0 0 195 195
Balance at Mar. 31, 2022 $ 373 1,753,328 $ (3,702,023) 4,087,441 (5,159) 2,133,960
Balance, Shares at Mar. 31, 2022 37,266   9,282      
Balance at Dec. 31, 2021 $ 371 1,729,312 $ (3,356,102) 3,929,147 (5,354) 2,297,374
Balance, Shares at Dec. 31, 2021 37,132   9,052      
Net income           675,374
Balance at Sep. 30, 2022 $ 373 1,807,938 $ (4,076,555) 4,604,521 (8,896) 2,327,381
Balance, Shares at Sep. 30, 2022 37,306   9,555      
Balance at Mar. 31, 2022 $ 373 1,753,328 $ (3,702,023) 4,087,441 (5,159) 2,133,960
Balance, Shares at Mar. 31, 2022 37,266   9,282      
Stock-based compensation $ 0 29,142 $ 0 0 0 29,142
Stock-based compensation, Shares 18          
Stock plan transactions and other $ 0 (167) 0 0 0 (167)
Acquisition of treasury stock 0 0 $ (267,198) 0 0 (267,198)
Acquisition of treasury stock, Shares     198      
Net income 0 0 $ 0 259,942 0 259,942
Other comprehensive income (loss), net of income tax 0 0 0 0 (1,480) (1,480)
Balance at Jun. 30, 2022 $ 373 1,782,303 $ (3,969,221) 4,347,383 (6,639) 2,154,199
Balance, Shares at Jun. 30, 2022 37,284   9,480      
Stock-based compensation $ 0 25,587 $ 0 0 0 25,587
Stock-based compensation, Shares 0   0      
Stock plan transactions and other $ 0 48 $ 0 0 0 48
Stock plan transactions and other, Shares 22   0      
Acquisition of treasury stock $ 0 0 $ (107,334) 0 0 (107,334)
Acquisition of treasury stock, Shares 0   75      
Net income $ 0 0 $ 0 257,138 0 257,138
Other comprehensive income (loss), net of income tax 0 0 0 0 (2,257) (2,257)
Balance at Sep. 30, 2022 $ 373 $ 1,807,938 $ (4,076,555) $ 4,604,521 $ (8,896) $ 2,327,381
Balance, Shares at Sep. 30, 2022 37,306   9,555